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cryptokitties.co

cryptokitties.co is SSL secured

Free website and domain report on cryptokitties.co

Last Updated: 12th January, 2021 Update Now
Overview

Snoop Summary for cryptokitties.co

This is a free and comprehensive report about cryptokitties.co. Cryptokitties.co is expected to earn an estimated $19 USD per day from advertising revenue. The sale of cryptokitties.co would possibly be worth $14,083 USD. This figure is based on the daily revenue potential of the website over a 24 month period. Cryptokitties.co is very popular with an estimated 6,764 daily unique visitors. This report was last updated 12th January, 2021.

About cryptokitties.co

Site Preview: cryptokitties.co cryptokitties.co
Title: CryptoKitties | Collect and breed digital cats!
Description: Collect and trade CryptoKitties in one of the world’s first blockchain games. Breed your rarest cats to create the purrfect furry friend. The future is meow!
Keywords and Tags: banking, finance, hardware, software
Related Terms: breed, cats meow design, collect en go collishop, collect it.de, declawing cats, doberman breed, geelong cats, global collect login, rarest pokemon in pokemon go, superstore click and collect
Fav Icon:
Age: Over 7 years old
Domain Created: 13th September, 2017
Domain Updated: 17th August, 2020
Domain Expires: 9th December, 2021
Review

Snoop Score

2/5

Valuation

$14,083 USD
Note: All valuation figures are estimates.

Popularity

High
Note: Popularity is estimated.

Rank, Reach and Authority

Alexa Rank: 66,199
Alexa Reach:
SEMrush Rank (US):
SEMrush Authority Score:
Moz Domain Authority: 0
Moz Page Authority: 0

Organic vs Paid (Google Ads)

Traffic

Visitors

Daily Visitors: 6,764
Monthly Visitors: 205,875
Yearly Visitors: 2,468,860
Note: All visitors figures are estimates.

Visitors By Country

Revenue

Revenue

Daily Revenue: $19 USD
Monthly Revenue: $587 USD
Yearly Revenue: $7,036 USD
Note: All revenue figures are estimates.

Revenue By Country

SEO

Backlinks Analysis (SEMrush)

Top New Follow Links

Top Ranking Keywords (US)

Domain Analysis

Value Length
Domain: cryptokitties.co 16
Domain Name: cryptokitties 13
Extension (TLD): co 2
Expiry Check:

Page Speed Analysis

Average Load Time:
Load Time Comparison:

PageSpeed Insights

Avg. (All Categories) 61
Performance 34
Accessibility 83
Best Practices 86
SEO 82
Progressive Web App 19
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
URL: https://www.cryptokitties.co/
Updated: 12th January, 2021

1.61 seconds
First Contentful Paint (FCP)
50%
42%
8%

0.00 seconds
First Input Delay (FID)
98%
1%
1%

Simulate loading on desktop
34

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for cryptokitties.co. This includes details about optimizing page load times which can result in a better user experience.

Opportunities

Eliminate render-blocking resources — Potential savings of 20 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. Cryptokitties.co should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.
URL Transfer Size (Bytes) Potential Savings (Ms)
https://www.cryptokitties.co/92.e52136a8975c4bcca0f6.css
2224
70
https://www.cryptokitties.co/index.e28620011227c1e39391.css
27731
230
Defer offscreen images
Time to Interactive can be slowed down by resources on the page. Cryptokitties.co should consider lazy-loading offscreen and hidden images.
Minify CSS
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Cryptokitties.co should consider minifying CSS files.
Minify JavaScript
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Cryptokitties.co should consider minifying JS files.
Remove unused CSS — Potential savings of 25 KiB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Cryptokitties.co should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://www.cryptokitties.co/index.e28620011227c1e39391.css
27731
25395
Efficiently encode images
Unoptimized images can consume more cellular data than what is necessary.
Serve images in next-gen formats — Potential savings of 91 KiB
Image formats like PNG and JPEG have poor compression when compared to other next-gen formats, such as JPEG 200, JPEG XR and WebP.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://www.cryptokitties.co/images/landing/fanciesFront.png
65306
25320
https://www.cryptokitties.co/images/landing/colortunnel.png
69130
22534
https://www.cryptokitties.co/images/landing/fanciesMid.png
78486
20350
https://www.cryptokitties.co/images/landing/fanciesBack.png
85020
15546
https://www.cryptokitties.co/profile/profile-8.png
14286
9408
Enable text compression
Text-based resources should be served with compression, such as gzip, deflate or brotli.
Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.
Initial server response time was short — Root document took 160 ms
It is advised to keep the server response time short for the main document, because all other requests depend on it.
URL Time Spent (Ms)
https://www.cryptokitties.co/
157.754
Avoid multiple page redirects — Potential savings of 190 ms
Redirects can cause additional delays before the page can begin loading. Cryptokitties.co should avoid multiple or unnecessary page redirects.
URL Time Spent (Ms)
http://cryptokitties.co/
190
https://www.cryptokitties.co/
0
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.
Remove duplicate modules in JavaScript bundles
Ensure that no duplicate JavaScript modules from bundles exist to reduce bytes consumed by network activity.
Avoid serving legacy JavaScript to modern browsers — Potential savings of 31 KiB
Polyfills and transforms enable legacy browsers to use new JavaScript features. For bundled JavaScript it is recommended to adopt a modern script deployment strategy using module/nomodule feature detection. This will reduce the amount of code shipped to modern browsers.
URL Potential Savings (Bytes)
https://connect.facebook.net/signals/config/708919165966544?v=2.9.32&r=stable
12048
https://cdn.mxpnl.com/libs/mixpanel-2-latest.min.js
6698
https://www.cryptokitties.co/vendors.a6d26e7946be9995254d.bundle.js
6464
https://cdn.segment.com/analytics.js/v1/WollPzSg2YbRMflpsUycVBC7rxApqsFn/analytics.min.js
3814
https://www.cryptokitties.co/index.df3da66cf1ff62311254.js
2970
https://connect.facebook.net/en_US/fbevents.js
45
https://www.cryptokitties.co/57.416199e363b68eb613b2.bundle.js
22

Diagnostics

Avoids enormous network payloads — Total size was 2,273 KiB
Large network payloads can cost users money and are linked to long load times.
URL Transfer Size (Bytes)
https://www.cryptokitties.co/vendors.a6d26e7946be9995254d.bundle.js
539108
https://storage.googleapis.com/ck-kitty-image/0x06012c8cf97bead5deae237070f9587f8e7a266d/1971733.svg
246205
https://www.cryptokitties.co/index.df3da66cf1ff62311254.js
226705
https://storage.googleapis.com/ck-kitty-image/0x06012c8cf97bead5deae237070f9587f8e7a266d/1975860.svg
213360
https://storage.googleapis.com/ck-kitty-image/0x06012c8cf97bead5deae237070f9587f8e7a266d/1971702.svg
109371
https://storage.googleapis.com/ck-kitty-image/0x06012c8cf97bead5deae237070f9587f8e7a266d/992151.svg
89507
https://www.cryptokitties.co/images/landing/fanciesBack.png
85746
https://www.cryptokitties.co/images/landing/fanciesMid.png
79212
https://connect.facebook.net/signals/config/708919165966544?v=2.9.32&r=stable
72706
https://www.cryptokitties.co/images/landing/colortunnel.png
69856
Avoid chaining critical requests — 6 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Cryptokitties.co should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
User Timing marks and measures
Make use of the User Timing API to measure an app's real-world performance during key user experiences.
Minimizes main-thread work — 2.0 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
Category Time Spent (Ms)
Script Evaluation
1415.663
Other
189.488
Style & Layout
114.594
Rendering
107.672
Garbage Collection
75.902
Script Parsing & Compilation
70.486
Parse HTML & CSS
17.326
Keep request counts low and transfer sizes small — 89 requests • 2,273 KiB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.
Resource Type Requests Transfer Size (Bytes)
Total
89
2327435
Image
34
1113211
Script
16
1091146
Font
2
63431
Stylesheet
3
33581
Other
33
24006
Document
1
2060
Media
0
0
Third-party
43
965784
Minimize third-party usage — Third-party code blocked the main thread for 0 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.
Third-Party Transfer Size (Bytes) Main-Thread Blocking Time (Ms)
SHOW DETAILS
659189
0
SHOW DETAILS
98635
0
SHOW DETAILS
69990
0
SHOW DETAILS
49072
0
SHOW DETAILS
28772
0
SHOW DETAILS
20686
0
SHOW DETAILS
16348
0
SHOW DETAILS
10649
0
SHOW DETAILS
3473
0
SHOW DETAILS
2882
0
Largest Contentful Paint element — 1 element found
The element which was identified as the Largest Contentful Paint.
Element
Knight Kitty
Avoid large layout shifts — 5 elements found
Below is a list of all DOM elements that contribute to the CLS of the page.
Element CLS Contribution
My Profile Activity Search KittyVerse FAQs Player's Guide Latest updates Email …
0.23743104806935
CryptoKitties Collect and breed furrever friends! Get your own Kitty Buy & se…
0.19189913870849
What is CryptoKitties? CryptoKitties is a game centered around breedable, coll…
0.050758367390675
Get your own Kitty Buy & sell cats with our community Crack puzzles alongside o…
0.035111247065345
CryptoKitties No wallet Catalogue Search Guides More Start Community Feed
0.033638790197135
Uses passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
Avoids `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.
Avoid long main-thread tasks — 5 long tasks found
Below is a list of the longest tasks on the main thread, which is useful when identifying the worst input delay contributors.
URL Start Time (Ms) Duration (Ms)
https://www.cryptokitties.co/vendors.a6d26e7946be9995254d.bundle.js
2140
450
https://www.cryptokitties.co/57.416199e363b68eb613b2.bundle.js
4600
142
https://cdn.ravenjs.com/3.20.1/raven.min.js
2820
92
https://cdn.ravenjs.com/3.20.1/raven.min.js
3052
90
https://cdn.segment.com/analytics.js/v1/WollPzSg2YbRMflpsUycVBC7rxApqsFn/analytics.min.js
2590
75
Avoid non-composited animations
It is recommended to avoid non-composited animations which are often janky and increase CLS.
Avoids large JavaScript libraries with smaller alternatives — 0 large libraries found
It is recommended to work with smaller JavaScript libraries to reduce your bundle size and avoid poor performance.

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.
Timing budget
It is advised to set a timing budget to monitor the performance of your site.

Other

Network Requests
Below is a list of network requests that were made during page load.
URL Start Time (Ms) End Time (Ms) Transfer Size (Bytes) Resource Size (Bytes) Status Code MIME Type Resource Type
http://cryptokitties.co/
0
39.292000001296
267
0
307
text/html
https://www.cryptokitties.co/
39.74100004416
196.49699999718
2060
3676
200
text/html
Document
https://www.cryptokitties.co/92.e52136a8975c4bcca0f6.css
209.61499999976
321.28000003286
2224
5048
200
text/css
Stylesheet
https://www.cryptokitties.co/index.e28620011227c1e39391.css
209.93200002704
342.6230000332
27731
183339
200
text/css
Stylesheet
https://cdn.ravenjs.com/3.20.1/raven.min.js
210.08300001267
226.17900004843
10649
27135
200
application/javascript
Script
https://www.cryptokitties.co/vendors.a6d26e7946be9995254d.bundle.js
210.57200001087
347.67700004159
539108
1888155
200
application/javascript
Script
https://www.cryptokitties.co/index.df3da66cf1ff62311254.js
210.72400000412
365.54000002798
226705
978789
200
application/javascript
Script
https://www.googletagmanager.com/gtm.js?id=GTM-MPBB7JJ
212.25199999753
243.8919999986
49072
134290
200
application/javascript
Script
https://www.google-analytics.com/analytics.js
272.05800003139
275.68100002827
19451
47051
200
text/javascript
Script
https://www.googleadservices.com/pagead/conversion_async.js
272.98700000392
367.02000000514
13377
31077
200
text/javascript
Script
https://static.ads-twitter.com/uwt.js
276.93300001556
291.76500003086
2509
5160
200
application/javascript
Script
https://connect.facebook.net/en_US/fbevents.js
282.9250000068
300.69100001128
24915
91651
200
application/x-javascript
Script
https://www.google-analytics.com/j/collect?v=1&_v=j87&a=1625826624&t=pageview&_s=1&dl=https%3A%2F%2Fwww.cryptokitties.co%2F&ul=en-us&de=UTF-8&dt=CryptoKitties%20%7C%20Collect%20and%20breed%20digital%20cats!&sd=24-bit&sr=800x600&vp=1350x940&je=0&_u=YEBAAEABAAAAAC~&jid=51119051&gjid=1499118965&cid=1175542508.1610467332&tid=UA-37966141-26&_gid=110047431.1610467332&_r=1&gtm=2wgbu0MPBB7JJ&z=837863810
303.67300001672
306.54100002721
629
2
200
text/plain
XHR
https://www.google-analytics.com/collect?v=1&_v=j87&a=1625826624&t=pageview&_s=1&dl=https%3A%2F%2Fwww.cryptokitties.co%2F&ul=en-us&de=UTF-8&dt=CryptoKitties%20%7C%20Collect%20and%20breed%20digital%20cats!&sd=24-bit&sr=800x600&vp=1350x940&je=0&_u=YEDAAEABAAAAAC~&jid=&gjid=&cid=1175542508.1610467332&tid=UA-37966141-26&_gid=110047431.1610467332&gtm=2wgbu0MPBB7JJ&z=1669862939
309.53900003806
312.28300003568
606
35
200
image/gif
Image
https://stats.g.doubleclick.net/j/collect?t=dc&aip=1&_r=3&v=1&_v=j87&tid=UA-37966141-26&cid=1175542508.1610467332&jid=51119051&gjid=1499118965&_gid=110047431.1610467332&_u=YEBAAEAAAAAAAC~&z=707057121
312.73200002033
315.66700001713
701
1
200
text/plain
XHR
https://t.co/i/adsct?type=javascript&version=1.1.0&p_id=Twitter&p_user_id=0&txn_id=o0438&events=%5B%5B%22pageview%22%2Cnull%5D%5D&tw_sale_amount=0&tw_order_quantity=0&tw_iframe_status=0&tw_document_href=https%3A%2F%2Fwww.cryptokitties.co%2F
315.40800002404
349.81500002323
689
43
200
image/gif
Image
https://connect.facebook.net/signals/config/708919165966544?v=2.9.32&r=stable
327.18000002205
387.57000002079
72706
246939
200
application/x-javascript
Script
https://googleads.g.doubleclick.net/pagead/viewthroughconversion/868474399/?random=1610467332208&cv=9&fst=1610467332208&num=1&guid=ON&resp=GooglemKTybQhCsO&u_h=600&u_w=800&u_ah=600&u_aw=800&u_cd=24&u_his=2&u_tz=-480&u_java=false&u_nplug=0&u_nmime=0&gtm=2wgbu0&sendb=1&ig=1&frm=0&url=https%3A%2F%2Fwww.cryptokitties.co%2F&tiba=CryptoKitties%20%7C%20Collect%20and%20breed%20digital%20cats!&hn=www.googleadservices.com&async=1&rfmt=3&fmt=4
377.16299999738
385.26400004048
2270
1608
200
text/javascript
Script
https://www.google.com/pagead/1p-user-list/868474399/?random=1610467332208&cv=9&fst=1610467200000&num=1&guid=ON&u_h=600&u_w=800&u_ah=600&u_aw=800&u_cd=24&u_his=2&u_tz=-480&u_java=false&u_nplug=0&u_nmime=0&gtm=2wgbu0&sendb=1&frm=0&url=https%3A%2F%2Fwww.cryptokitties.co%2F&tiba=CryptoKitties%20%7C%20Collect%20and%20breed%20digital%20cats!&async=1&fmt=3&is_vtc=1&random=1148024415&resp=GooglemKTybQhCsO&rmt_tld=0&ipr=y
388.20600003237
432.4520000373
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42
200
image/gif
Image
https://www.facebook.com/tr/?id=708919165966544&ev=PageView&dl=https%3A%2F%2Fwww.cryptokitties.co%2F&rl=&if=false&ts=1610467332254&sw=800&sh=600&v=2.9.32&r=stable&ec=0&o=30&par[0]=%7B%22extractorID%22%3A%222572851552994380%22%2C%22jsonLD%22%3A%7B%22%40context%22%3A%22http%3A%2F%2Fschema.org%22%2C%22%40type%22%3A%22Product%22%2C%22offers%22%3A%7B%22priceCurrency%22%3A%22USD%22%7D%7D%7D&par[1]=%7B%22extractorID%22%3A%22478318529746264%22%2C%22jsonLD%22%3A%7B%22%40context%22%3A%22http%3A%2F%2Fschema.org%22%2C%22%40type%22%3A%22Product%22%2C%22offers%22%3A%7B%7D%7D%7D&fbp=fb.1.1610467332251.1415269326&it=1610467332160&coo=false&rqm=GET
421.52800003532
436.17500003893
507
44
200
image/gif
Image
https://cdn.segment.com/analytics.js/v1/WollPzSg2YbRMflpsUycVBC7rxApqsFn/analytics.min.js
834.20800004387
859.41100004129
67730
362662
200
text/javascript
Script
https://api.cryptokitties.co/V2/exchange-rates?currency=ETH
869.85700001242
992.6170000108
2886
4427
200
application/json
XHR
https://analytics.twitter.com/i/adsct?type=javascript&version=1.1.0&p_id=Twitter&p_user_id=0&txn_id=o0438&events=%5B%5B%22pageview%22%2Cnull%5D%5D&tw_sale_amount=0&tw_order_quantity=0&tw_iframe_status=0&tpx_cb=twttr.conversion.loadPixels&tw_document_href=https%3A%2F%2Fwww.cryptokitties.co%2F
870.87400001474
907.87600004114
964
31
200
application/javascript
Script
https://www.cryptokitties.co/images/loader.gif
871.28100002883
902.48300001258
23746
23021
200
image/gif
Image
https://xid.cryptokitties.co/v1/id/WollPzSg2YbRMflpsUycVBC7rxApqsFn
940.5460000271
1326.3310000184
392
37
200
application/json
XHR
https://xid.meetdapper.com/v1/id/WollPzSg2YbRMflpsUycVBC7rxApqsFn
940.84200001089
1357.938000001
392
37
200
application/json
XHR
https://xid.cheezewizards.com/v1/id/WollPzSg2YbRMflpsUycVBC7rxApqsFn
941.25600002008
1340.3950000065
392
37
200
application/json
XHR
https://api.segment.io/v1/p
965.73600004194
1059.1840000125
226
21
200
application/json
XHR
https://www.facebook.com/tr/?id=708919165966544&ev=Microdata&dl=https%3A%2F%2Fwww.cryptokitties.co%2F&rl=&if=false&ts=1610467332806&cd[DataLayer]=%5B%5D&cd[Meta]=%7B%22title%22%3A%22CryptoKitties%20%7C%20Collect%20and%20breed%20digital%20cats!%22%2C%22meta%3Adescription%22%3A%22Collect%20and%20trade%20CryptoKitties%20in%20one%20of%20the%20world%E2%80%99s%20first%20blockchain%20games.%20Breed%20your%20rarest%20cats%20to%20create%20the%20purrfect%20furry%20friend.%20The%20future%20is%20meow!%22%7D&cd[OpenGraph]=%7B%22og%3Atype%22%3A%22website%22%2C%22og%3Asite_name%22%3A%22CryptoKitties%22%2C%22og%3Atitle%22%3A%22CryptoKitties%20%7C%20Collect%20and%20breed%20digital%20cats!%22%2C%22og%3Adescription%22%3A%22Collect%20and%20trade%20CryptoKitties%20in%20one%20of%20the%20world%E2%80%99s%20first%20blockchain%20games.%20Breed%20your%20rarest%20cats%20to%20create%20the%20purrfect%20furry%20friend.%20The%20future%20is%20meow!%22%2C%22og%3Aimage%22%3A%22https%3A%2F%2Fwww.cryptokitties.co%2Fimages%2Fshare.png%22%2C%22og%3Aurl%22%3A%22https%3A%2F%2Fwww.cryptokitties.co%22%7D&cd[Schema.org]=%5B%5D&cd[JSON-LD]=%5B%5D&sw=800&sh=600&v=2.9.32&r=stable&ec=1&o=30&fbp=fb.1.1610467332251.1415269326&it=1610467332160&coo=false&es=automatic&tm=3&rqm=GET
973.64400001243
988.54200000642
507
44
200
image/gif
Image
https://cdn.mxpnl.com/libs/mixpanel-2-latest.min.js
973.95600000164
978.83100004401
28257
82429
200
text/javascript
Script
https://api-js.mixpanel.com/decide/?verbose=1&version=1&lib=web&token=f59c8a840fb076d139dcc9e6c780c0fc&ip=1&_=1610467332831
997.87400005152
1028.6429999978
515
65
200
application/json
XHR
https://api.segment.io/v1/t
1011.176
1111.0040000058
226
21
200
application/json
XHR
https://www.cryptokitties.co/4.c211d337676a5736e335.bundle.js
1032.0510000456
1059.7530000377
12238
31937
200
application/javascript
Script
https://www.cryptokitties.co/57.a48a5e90919a53a6c12b.css
1032.5550000416
1055.6160000269
3626
18021
200
text/css
Stylesheet
https://www.cryptokitties.co/57.416199e363b68eb613b2.bundle.js
1032.9600000405
1100.2549999976
18358
180354
200
application/javascript
Script
https://app.launchdarkly.com/sdk/goals/5d274546bcd80b076903f677
1042.6270000171
1086.9079999975
774
0
200
Other
https://app.launchdarkly.com/sdk/evalx/5d274546bcd80b076903f677/users/eyJhbm9ueW1vdXMiOnRydWUsImtleSI6IkFOT05ZTU9VU19VU0VSIn0
1093.1120000314
1125.9680000367
774
0
200
Other
https://app.launchdarkly.com/sdk/goals/5d274546bcd80b076903f677
1087.5780000351
1102.9700000072
896
2
200
application/json
XHR
https://app.launchdarkly.com/sdk/evalx/5d274546bcd80b076903f677/users/eyJhbm9ueW1vdXMiOnRydWUsImtleSI6IkFOT05ZTU9VU19VU0VSIn0
1126.6330000362
1146.3590000058
1170
1177
200
application/json
XHR
https://www.cryptokitties.co/icons/paw.svg
1093.234000029
1116.9800000498
1423
1190
200
image/svg+xml
Image
https://www.cryptokitties.co/icons/icon-message.svg
1093.3170000208
1117.9390000179
974
365
200
image/svg+xml
Image
https://www.cryptokitties.co/icons/icon-discord-white.svg
1093.4710000292
1148.3630000148
1221
927
200
image/svg+xml
Image
https://www.cryptokitties.co/api/banner?lng=en
1096.7730000266
1295.4170000157
875
223
200
application/json
XHR
https://www.cryptokitties.co/icons/logo.svg
1099.1110000177
1155.9160000179
2395
4583
200
image/svg+xml
Image
https://www.cryptokitties.co/fonts/Calibre-Regular.woff2
1103.4070000169
1170.9410000476
32253
31515
200
application/font-woff2
Font
https://www.cryptokitties.co/fonts/Calibre-Medium.woff2
1103.6390000372
1184.2230000184
31178
30440
200
application/font-woff2
Font
https://www.cryptokitties.co/images/landing/bgpattern.svg
1180.4020000272
1210.1250000414
956
417
200
image/svg+xml
Image
https://www.cryptokitties.co/images/landing/colortunnel.png
1182.8280000482
1211.4470000379
69856
69130
200
image/png
Image
https://www.cryptokitties.co/images/pattern-tile.svg
1328.8480000338
1357.4920000392
5556
30786
200
image/svg+xml
Image
https://www.cryptokitties.co/images/ether-diamond.gif
1329.058000003
1358.1819999963
20556
19831
200
image/gif
Image
https://www.cryptokitties.co/78.d26e1fcf07cc9875fc1f.bundle.js
1387.320000038
1419.3850000156
2837
10234
200
application/javascript
Script
https://www.cryptokitties.co/images/landing/fanciesFront.png
1413.2330000284
1437.2720000101
66031
65306
200
image/png
Image
https://www.cryptokitties.co/images/landing/fanciesMid.png
1413.4020000347
1441.9530000305
79212
78486
200
image/png
Image
https://www.cryptokitties.co/images/landing/fanciesBack.png
1413.6130000115
1500.8550000493
85746
85020
200
image/png
Image
https://www.cryptokitties.co/images/kitty-eth.svg
1413.8890000177
1438.1510000094
7981
17913
200
image/svg+xml
Image
https://www.cryptokitties.co/images/breeding-heart/breeding-kitties.svg
1414.1030000173
1448.6510000424
32102
86172
200
image/svg+xml
Image
https://www.cryptokitties.co/icons/coins.svg
1414.3020000192
1484.4990000129
3350
6766
200
image/svg+xml
Image
https://www.cryptokitties.co/icons/puzzles.svg
1414.5850000205
1463.2229999988
2006
3238
200
image/svg+xml
Image
https://www.cryptokitties.co/icons/gift.svg
1414.8000000278
1473.2930000173
1755
2074
200
image/svg+xml
Image
https://www.cryptokitties.co/icons/eggCrack.svg
1414.9850000395
1479.3210000498
1698
2109
200
image/svg+xml
Image
https://www.cryptokitties.co/icons/eggplant.svg
1415.5470000114
1482.0760000148
1874
2162
200
image/svg+xml
Image
https://www.cryptokitties.co/icons/games.svg
1416.5590000339
1472.5970000145
2166
3066
200
image/svg+xml
Image
https://api.cryptokitties.co/v2/collections/featured
1516.0120000364
1575.4220000235
1647
6885
200
application/json
XHR
https://api.cryptokitties.co/v2/kitties/recommend?offset=0&limit=4
1516.4520000108
3082.7520000166
2729
15462
200
application/json
XHR
https://api.cryptokitties.co/v2/browse/cattributes?offset=0&limit=2
1516.8399999966
1694.4740000181
2744
13843
200
application/json
XHR
https://api.cryptokitties.co/v2/browse/latest-fancies?offset=0&limit=3
1517.2770000063
1642.3720000312
822
1754
200
application/json
XHR
https://api.cryptokitties.co/v2/browse/latest-exclusives?offset=0&limit=3
1517.7180000464
1666.0000000265
807
1605
200
application/json
XHR
https://api.cryptokitties.co/v2/browse/latest-special-editions?offset=0&limit=3
1518.1730000186
1707.9690000392
804
1627
200
application/json
XHR
https://www.cryptokitties.co/icons/cross.svg
1539.242000028
1602.9190000263
878
143
200
image/svg+xml
Image
https://api.segment.io/v1/t
1570.2660000534
1665.5050000409
226
21
200
application/json
XHR
https://xid.cryptokitties.co/v1/saveId?writeKey=WollPzSg2YbRMflpsUycVBC7rxApqsFn&xid=7c059fb0-4a07-46d6-a24d-c2da083fe8c3
1594.0500000142
1966.3540000329
529
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200
text/plain
XHR
https://api.segment.io/v1/i
1601.6440000385
1692.4080000026
226
21
200
application/json
XHR
https://clientstream.launchdarkly.com/eval/5d274546bcd80b076903f677/eyJhbm9ueW1vdXMiOnRydWUsImtleSI6IkFOT05ZTU9VU19VU0VSIn0
1624.988000025
0
0
-1
EventSource
https://api.segment.io/v1/t
1651.4410000527
1744.2589999991
226
21
200
application/json
XHR
https://api.segment.io/v1/t
1671.8519999995
1762.9860000452
226
21
200
application/json
XHR
https://api.segment.io/v1/t
1726.8370000529
1817.5740000443
226
21
200
application/json
XHR
https://api.segment.io/v1/t
1733.3809999982
1825.6540000439
226
21
200
application/json
XHR
https://api.segment.io/v1/t
1753.8500000373
1863.8430000283
226
21
200
application/json
XHR
https://api.segment.io/v1/t
3088.2650000276
3181.7350000492
226
21
200
application/json
XHR
https://storage.googleapis.com/ck-kitty-image/0x06012c8cf97bead5deae237070f9587f8e7a266d/1971733.svg
3125.3020000295
3195.6040000077
246205
245267
200
image/svg+xml
Image
https://pbs.twimg.com/profile_images/1165645847956250625/7GGHR-Nw_bigger.jpg
3125.5540000275
3146.7740000226
2882
2261
200
image/jpeg
Image
https://storage.googleapis.com/ck-kitty-image/0x06012c8cf97bead5deae237070f9587f8e7a266d/1975860.svg
3125.7980000228
3180.9240000439
213360
212415
200
image/svg+xml
Image
https://www.cryptokitties.co/profile/profile-11.png
3125.8760000346
3157.4550000369
9768
9045
200
image/png
Image
https://storage.googleapis.com/ck-kitty-image/0x06012c8cf97bead5deae237070f9587f8e7a266d/992151.svg
3126.8990000244
3183.7620000006
89507
88571
200
image/svg+xml
Image
https://www.cryptokitties.co/profile/profile-12.png
3129.151000001
3159.781000053
12571
11847
200
image/png
Image
https://storage.googleapis.com/ck-kitty-image/0x06012c8cf97bead5deae237070f9587f8e7a266d/1971702.svg
3129.4120000093
3210.2060000179
109371
108433
200
image/svg+xml
Image
https://www.cryptokitties.co/profile/profile-8.png
3129.5540000428
3160.2080000448
15010
14286
200
image/png
Image
https://events.launchdarkly.com/events/bulk/5d274546bcd80b076903f677
3721.9550000154
3742.0100000454
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0
204
application/json
Other
https://events.launchdarkly.com/events/bulk/5d274546bcd80b076903f677
3746.1430000258
3842.5040000002
509
0
202
application/json
XHR
Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.
Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.
Tasks
Below is a list of the top-level main thread tasks that executed during page load.
Start Time (Ms) End Time (Ms)
230.897
7.42
285.235
11.489
297.301
17.232
318.323
22.725
346.792
11.398
401.961
6.521
429.209
23.513
452.901
450.418
923.281
75.22
1014.585
21.018
1036.823
91.692
1128.545
20.955
1162.87
283.951
1446.862
13.298
1460.219
89.83
1561.355
33.705
1595.961
20.395
1618.262
5.041
1623.318
11.735
1659.02
18.347
1677.643
6.7
1687.906
6.768
1697.438
7.268
1705.168
22.812
1728.542
18.455
1752.069
6.837
1760.21
6.074
1766.678
12.949
1779.641
7.298
1789.117
13.778
1805.624
9.726
1830.334
10.037
1852.077
12.221
1884.079
7.075
1905.134
37.666
1954.392
12.613
1983.634
10.824
2012.504
7.954
2020.87
10.361
2043.025
8.115
2073.799
9.994
2120.906
37.745
2158.964
10.701
2184.899
5.522
2209.557
10.034
2238.74
12.166
2259.074
5.419
2279.367
14.425
2307.17
9.481
2350.809
6.478
2375.719
12.548
2408.355
11.902
2439.712
6.223
2467.956
10.794
2493.33
7.932
2513.72
5.581
2541.256
6.433
2567.013
8.348
2597.268
6.458
2626.768
29.533
2656.689
9.096
2688.917
5.236
2715.542
12.779
2740.758
9.12
2800.371
7.733
2824.765
10.539
2872.75
20.329
2902.759
12.989
2947.77
7.937
2963.251
16.424
3013.223
7.519
3046.594
9.448
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data

Metrics

Speed Index — 2.1 s
The time taken for the page contents to be visibly populated.
Time to Interactive — 3.8 s
The time taken for the page to become fully interactive.

Other

First CPU Idle — 2.9 s
The time taken for the page's main thread to be quiet enough to handle input.
Estimated Input Latency — 70 ms
The time taken for the page to respond to user input (during the busiest 5 second window of page load). Users are likely to perceive cryptokitties.co as laggy when the latency is higher than 0.05 seconds.

Opportunities

Properly size images — Potential savings of 200 KiB
Images can slow down the page's load time. Cryptokitties.co should consider serving more appropriate-sized images.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://www.cryptokitties.co/images/landing/fanciesBack.png
85020
63724
https://www.cryptokitties.co/images/landing/fanciesMid.png
78486
58827
https://www.cryptokitties.co/images/landing/fanciesFront.png
65306
48948
https://www.cryptokitties.co/profile/profile-8.png
14286
13442
https://www.cryptokitties.co/profile/profile-12.png
11847
11147
https://www.cryptokitties.co/profile/profile-11.png
9045
8511
Remove unused JavaScript — Potential savings of 433 KiB
It is advised to remove unused JavaScript in order to reduce bytes consumed by network activity.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://www.cryptokitties.co/vendors.a6d26e7946be9995254d.bundle.js
539108
265822
https://www.cryptokitties.co/index.df3da66cf1ff62311254.js
226705
101998
https://connect.facebook.net/signals/config/708919165966544?v=2.9.32&r=stable
72706
53212
https://www.googletagmanager.com/gtm.js?id=GTM-MPBB7JJ
49072
22267

Diagnostics

Avoid an excessive DOM size — 936 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.
Statistic Element Value
Total DOM Elements
936
Maximum DOM Depth
SHOW DETAILS
26
Maximum Child Elements
SHOW DETAILS
94
Reduce JavaScript execution time — 1.4 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
URL Total CPU Time (Ms) Script Evaluation (Ms) Script Parse (Ms)
https://www.cryptokitties.co/index.df3da66cf1ff62311254.js
625.60699999999
610.25599999999
14.539
https://cdn.ravenjs.com/3.20.1/raven.min.js
502.255
385.106
1.658
https://www.cryptokitties.co/57.416199e363b68eb613b2.bundle.js
293.765
220.742
3.58
https://www.cryptokitties.co/
141.077
2.924
1.111
https://www.cryptokitties.co/vendors.a6d26e7946be9995254d.bundle.js
101.36
12.657
26.412
Unattributable
90.741
1.369
0.179
https://cdn.segment.com/analytics.js/v1/WollPzSg2YbRMflpsUycVBC7rxApqsFn/analytics.min.js
87.501
62.72
8.142

Metrics

First Contentful Paint — 2.0 s
The time taken for the first image or text on the page to be rendered.
Largest Contentful Paint — 3.9 s
The timing of the largest text or image that is painted.
Total Blocking Time — 540 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).
Cumulative Layout Shift — 0.596
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Other

Max Potential First Input Delay — 450 ms
Users could experience a delay when interacting with the page.
First Meaningful Paint — 2.1 s
The time taken for the primary content of the page to be rendered.

Opportunities

Preload key requests — Potential savings of 1,590 ms
Key requests can be preloaded by using '<link rel=preload>'. Cryptokitties.co should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
URL Potential Savings (Ms)
https://www.cryptokitties.co/57.a48a5e90919a53a6c12b.css
1590
https://www.cryptokitties.co/fonts/Calibre-Regular.woff2
230

Diagnostics

Serve static assets with an efficient cache policy — 39 resources found
Cryptokitties.co can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.
URL Cache TTL (Ms) Transfer Size (Bytes)
https://cdn.segment.com/analytics.js/v1/WollPzSg2YbRMflpsUycVBC7rxApqsFn/analytics.min.js
300000
67730
https://cdn.mxpnl.com/libs/mixpanel-2-latest.min.js
600000
28257
https://connect.facebook.net/signals/config/708919165966544?v=2.9.32&r=stable
1200000
72706
https://connect.facebook.net/en_US/fbevents.js
1200000
24915
https://www.google-analytics.com/analytics.js
7200000
19451
https://www.cryptokitties.co/vendors.a6d26e7946be9995254d.bundle.js
14400000
539108
https://www.cryptokitties.co/index.df3da66cf1ff62311254.js
14400000
226705
https://www.cryptokitties.co/images/landing/fanciesBack.png
14400000
85746
https://www.cryptokitties.co/images/landing/fanciesMid.png
14400000
79212
https://www.cryptokitties.co/images/landing/colortunnel.png
14400000
69856
https://www.cryptokitties.co/images/landing/fanciesFront.png
14400000
66031
https://www.cryptokitties.co/fonts/Calibre-Regular.woff2
14400000
32253
https://www.cryptokitties.co/images/breeding-heart/breeding-kitties.svg
14400000
32102
https://www.cryptokitties.co/fonts/Calibre-Medium.woff2
14400000
31178
https://www.cryptokitties.co/index.e28620011227c1e39391.css
14400000
27731
https://www.cryptokitties.co/images/loader.gif
14400000
23746
https://www.cryptokitties.co/images/ether-diamond.gif
14400000
20556
https://www.cryptokitties.co/57.416199e363b68eb613b2.bundle.js
14400000
18358
https://www.cryptokitties.co/profile/profile-8.png
14400000
15010
https://www.cryptokitties.co/profile/profile-12.png
14400000
12571
https://www.cryptokitties.co/4.c211d337676a5736e335.bundle.js
14400000
12238
https://www.cryptokitties.co/profile/profile-11.png
14400000
9768
https://www.cryptokitties.co/images/kitty-eth.svg
14400000
7981
https://www.cryptokitties.co/images/pattern-tile.svg
14400000
5556
https://www.cryptokitties.co/57.a48a5e90919a53a6c12b.css
14400000
3626
https://www.cryptokitties.co/icons/coins.svg
14400000
3350
https://www.cryptokitties.co/78.d26e1fcf07cc9875fc1f.bundle.js
14400000
2837
https://www.cryptokitties.co/icons/logo.svg
14400000
2395
https://www.cryptokitties.co/92.e52136a8975c4bcca0f6.css
14400000
2224
https://www.cryptokitties.co/icons/games.svg
14400000
2166
https://www.cryptokitties.co/icons/puzzles.svg
14400000
2006
https://www.cryptokitties.co/icons/eggplant.svg
14400000
1874
https://www.cryptokitties.co/icons/gift.svg
14400000
1755
https://www.cryptokitties.co/icons/eggCrack.svg
14400000
1698
https://www.cryptokitties.co/icons/paw.svg
14400000
1423
https://www.cryptokitties.co/icons/icon-discord-white.svg
14400000
1221
https://www.cryptokitties.co/icons/icon-message.svg
14400000
974
https://www.cryptokitties.co/images/landing/bgpattern.svg
14400000
956
https://www.cryptokitties.co/icons/cross.svg
14400000
878
Ensure text remains visible during webfont load
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.
URL Potential Savings (Ms)
https://www.cryptokitties.co/fonts/Calibre-Regular.woff2
67.534000030719
https://www.cryptokitties.co/fonts/Calibre-Medium.woff2
80.583999981172
83

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of cryptokitties.co. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.
The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.
`[id]` attributes on active, focusable elements are unique
Ensure all focusable elements have a unique id value to allow them to be visible to users of assistive technologies, like a screen reader.
Heading elements appear in a sequentially-descending order
Properly order all headers and do not skip heading levels to better the navigation and readability for users of assistive technologies, like a screen reader.
No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`[aria-*]` attributes match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.
`[aria-hidden="true"]` is not present on the document `<body>`
If aria-hidden=true is set on the document body, assistive technologies, like a screen reader will work inconsistently.
`[aria-hidden="true"]` elements do not contain focusable descendents
Interactive elements within an aria-hidden=true element are unavailable to users of assistive technologies, like a screen reader.
ARIA input fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when an input field does not have an accessible name specified.
`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.
`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.
`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.
ARIA toggle fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when a toggle field does not have an accessible name specified.
`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.
`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.
ARIA IDs are unique
Ensure all ARIA ID values are unique to prevent elements from being overlooked by assistive technologies, like a screen reader.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.
Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
It is advised to not include data elements in tables which are used for layout purposes, as it may create confusion for screen reader and other assistive technology users.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Names and labels

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
No form fields have multiple labels
Having multiple labels for form fields can be confusing to assistive technologies, like a screen reader.
`<frame>` or `<iframe>` elements have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
Form elements have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
Links have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.
`<object>` elements have `[alt]` text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Internationalization and localization

`<html>` element has a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.
`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.
`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
Cryptokitties.co may provide assistance to deaf or hearing-impaired users with captions on videos.
`<video>` elements contain a `<track>` element with `[kind="description"]`
Cryptokitties.co may provide relevant information that dialogue cannot, by using audio descriptions.

Names and labels

Buttons do not have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.
Failing Elements
div
div

Contrast

Background and foreground colors do not have a sufficient contrast ratio.
Many (if not most) users find low-contrast text difficult or impossible to read.
Failing Elements
Events Page
Start
Get your own Kitty
115 kitties 31
31
Curated by
32 kitties 12
12
Curated by
18 kitties 12
12
Curated by
6 kitties 9
Curated by
Teach me how to breed
My Profile
Activity
Search
KittyVerse
FAQs
Player's Guide
Latest updates
Email us
About
Press
Tech details
White Pa-purr
Our Newsletter
Cheeze Wizards
NBA Top Shot
Flow Blockchain
Reddit
Twitter
YouTube
Discord
Pick of the litter at Dapper Labs
View our job openings
Terms of use
Privacy policy

Best practices

`[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.
Failing Elements
meta

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.
Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.
Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.
The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.
User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.
Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.
Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.
Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.
Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.
HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.
86

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that cryptokitties.co should incorporate. This includes practices such as protecting pages with HTTPS.

Audits

Links to cross-origin destinations are safe
Improve performance and prevent security vulnerabilities by adding rel="noopener" and rel="noreferrer" to external links.
Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids front-end JavaScript libraries with known security vulnerabilities
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.

Audits

Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.
Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.
Serves images with appropriate resolution
For maximum image clarity, ensure images have natural dimensions and are proportional to the display size and pixel ratio.
Fonts with `font-display: optional` are preloaded
It is recommended that optional fonts are preloaded.

Audits

Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.
Properly defines charset
It is advised to declare a character encoding, optionally via a <meta> tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header.

Audits

Avoids Application Cache
Application cache is deprecated and is no longer recommended.
Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Name Version
React
core-js
3.0.0: pure, 2.5.7: global, 2.5.7: pure
Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.
No browser errors logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.

Audits

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://cryptokitties.co/

Audits

Registers an `unload` listener
The 'unload' event does not fire reliably, causing issues with browser optimizations such as the Back-Forward Cache. It is recommended that 'pagehide' or 'visibilitychange' events are used instead.
URL
SHOW DETAILS
SHOW DETAILS
Missing source maps for large first-party JavaScript
Consider deploying source maps for added benefits such as the ability to debug while in production.
URL Map URL
https://www.cryptokitties.co/vendors.a6d26e7946be9995254d.bundle.js
https://www.cryptokitties.co/index.df3da66cf1ff62311254.js
https://cdn.ravenjs.com/3.20.1/raven.min.js
https://cdn.ravenjs.com/3.20.1/raven.min.js.map
82

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for cryptokitties.co. This includes optimizations such as providing meta data.

Mobile Friendly

Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of cryptokitties.co on mobile screens.
Document uses legible font sizes
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.
Tap targets are sized appropriately
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
Document has a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.
Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.
Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.
Links are crawlable
Ensure that the 'href' attribute of anchor elements links to the appropriate destination. This allows for more pages of the site to be discovered by search engines.
Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.

Content Best Practices

Links do not have descriptive text — 1 link found
Make use of descriptive link text to assist search engines in understanding the content.

Crawling and Indexing

robots.txt is not valid — 52 errors found
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.
Line # Content Error
1
<!DOCTYPE html>
Syntax not understood
2
<html lang="en">
Syntax not understood
4
<head>
Syntax not understood
5
<meta charset="UTF-8">
Syntax not understood
6
<title>CryptoKitties | Collect and breed digital cats!</title>
Syntax not understood
7
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
Syntax not understood
8
<meta name="description" content="Collect and trade CryptoKitties in one of the world’s first blockchain games. Breed your rarest cats to create the purrfect furry friend. The future is meow!">
Syntax not understood
9
<meta name="author" content="CryptoKitties">
Syntax not understood
10
<meta name="twitter:card" content="summary_large_image" />
Unknown directive
11
<meta name="twitter:site" content="@CryptoKitties" />
Unknown directive
12
<meta name="twitter:title" content="CryptoKitties | Collect and breed digital cats!" />
Unknown directive
13
<meta name="twitter:description" content="Collect and trade CryptoKitties in one of the world’s first blockchain games. Breed your rarest cats to create the purrfect furry friend. The future is meow!" />
Unknown directive
14
<meta name="twitter:image" content="https://www.cryptokitties.co/images/share.png" />
Unknown directive
15
<meta name="twitter:url" content="https://www.cryptokitties.co" />
Unknown directive
16
<meta name="google-site-verification" content="sZu6_ZGzpfvQSOhqx_tJeDNK6xsXaIOs97D7XdoTmK4" />
Syntax not understood
17
<meta property="og:type" content="website" />
Unknown directive
18
<meta property="og:site_name" content="CryptoKitties" />
Unknown directive
19
<meta property="og:title" content="CryptoKitties | Collect and breed digital cats!" />
Unknown directive
20
<meta property="og:description" content="Collect and trade CryptoKitties in one of the world’s first blockchain games. Breed your rarest cats to create the purrfect furry friend. The future is meow!" />
Unknown directive
21
<meta property="og:image" content="https://www.cryptokitties.co/images/share.png" />
Unknown directive
22
<meta property="og:url" content="https://www.cryptokitties.co" />
Unknown directive
23
<link rel="shortcut icon" href="/icons/favicon.ico">
Syntax not understood
24
<link rel="apple-touch-icon" sizes="57x57" href="/icons/apple-icon-57x57.png">
Syntax not understood
25
<link rel="apple-touch-icon" sizes="60x60" href="/icons/apple-icon-60x60.png">
Syntax not understood
26
<link rel="apple-touch-icon" sizes="72x72" href="/icons/apple-icon-72x72.png">
Syntax not understood
27
<link rel="apple-touch-icon" sizes="76x76" href="/icons/apple-icon-76x76.png">
Syntax not understood
28
<link rel="apple-touch-icon" sizes="114x114" href="/icons/apple-icon-114x114.png">
Syntax not understood
29
<link rel="apple-touch-icon" sizes="120x120" href="/icons/apple-icon-120x120.png">
Syntax not understood
30
<link rel="apple-touch-icon" sizes="144x144" href="/icons/apple-icon-144x144.png">
Syntax not understood
31
<link rel="apple-touch-icon" sizes="152x152" href="/icons/apple-icon-152x152.png">
Syntax not understood
32
<link rel="apple-touch-icon" sizes="180x180" href="/icons/apple-icon-180x180.png">
Syntax not understood
33
<link rel="icon" type="image/png" sizes="192x192" href="/icons/android-icon-192x192.png">
Syntax not understood
35
<!-- Google Tag Manager -->
Syntax not understood
36
<script>
Syntax not understood
37
(function (w, d, s, l, i) {
Syntax not understood
38
w[l] = w[l] || []; w[l].push({
Syntax not understood
39
'gtm.start':
Unknown directive
40
new Date().getTime(), event: 'gtm.js'
Unknown directive
41
}); var f = d.getElementsByTagName(s)[0],
Syntax not understood
42
j = d.createElement(s), dl = l != 'dataLayer' ? '&l=' + l : ''; j.async = true; j.src =
Unknown directive
43
'https://www.googletagmanager.com/gtm.js?id=' + i + dl; f.parentNode.insertBefore(j, f);
Unknown directive
44
})(window, document, 'script', 'dataLayer', window.location.host === "www.cryptokitties.co" ? 'GTM-MPBB7JJ' : 'GTM-5LGLQ56');
Unknown directive
45
</script>
Syntax not understood
46
<!-- End Google Tag Manager -->
Syntax not understood
47
<link href="/92.e52136a8975c4bcca0f6.css" rel="stylesheet"><link href="/index.e28620011227c1e39391.css" rel="stylesheet"></head>
Syntax not understood
49
<body>
Syntax not understood
50
<div id="app"></div>
Syntax not understood
51
<!-- Sentry logging -->
Syntax not understood
52
<script src="https://cdn.ravenjs.com/3.20.1/raven.min.js" crossorigin="anonymous"></script>
Unknown directive
53
<!-- End Sentry logging -->
Syntax not understood
54
<script type="text/javascript" src="/vendors.a6d26e7946be9995254d.bundle.js"></script><script type="text/javascript" src="/index.df3da66cf1ff62311254.js"></script></body>
Syntax not understood
56
</html>
Syntax not understood

Manual Checks

Structured data is valid
Structured data can be validated through the use of the Structured Data Testing Tool and the Structured Data Linter.
19

Progressive Web App

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of cryptokitties.co. This includes details about web app manifests.

PWA Optimized

Redirects HTTP traffic to HTTPS
It is advised to redirect all HTTP traffic to HTTPS, in order to enable secure web features for all users.
Content is sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of cryptokitties.co on mobile screens.
Provides a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.

Fast and reliable

Page load is not fast enough on mobile networks — Interactive on simulated mobile network at 15.7 s
Ensure that the page loads fast enough over a cellular network, to ensure good mobile user experience.
Current page does not respond with a 200 when offline
In order for Progressive Web Apps to be made available offline, ensure that the app is using a service worker.
`start_url` does not respond with a 200 when offline
Consider using a service worker for Progressive Web Apps to ensure greater reliability for the user, in the case of poor network conditions.

Installable

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://cryptokitties.co/
Does not register a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.
Web app manifest does not meet the installability requirements
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
View Data

PWA Optimized

Is not configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Does not set a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data
Does not provide fallback content when JavaScript is not available
Apps should display alternative content for when JavaScript is disabled.
Manifest doesn't have a maskable icon
Maskable icons are great to ensure that images fill the entire shape when installing the app on a device.

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.
Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.
Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.
Avg. (All Categories) 56
Performance 4
Accessibility 81
Best Practices 86
SEO 87
Progressive Web App 21
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
URL: https://www.cryptokitties.co/
Updated: 12th January, 2021

3.36 seconds
First Contentful Paint (FCP)
7%
63%
30%

0.05 seconds
First Input Delay (FID)
92%
6%
2%

Simulate loading on mobile
4

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for cryptokitties.co. This includes details about optimizing page load times which can result in a better user experience.

Opportunities

Defer offscreen images — Potential savings of 83 KiB
Time to Interactive can be slowed down by resources on the page. Cryptokitties.co should consider lazy-loading offscreen and hidden images.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://www.cryptokitties.co/images/landing/fanciesBack.png
85020
85020
Minify CSS
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Cryptokitties.co should consider minifying CSS files.
Minify JavaScript
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Cryptokitties.co should consider minifying JS files.
Efficiently encode images
Unoptimized images can consume more cellular data than what is necessary.
Enable text compression
Text-based resources should be served with compression, such as gzip, deflate or brotli.
Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.
Initial server response time was short — Root document took 130 ms
It is advised to keep the server response time short for the main document, because all other requests depend on it.
URL Time Spent (Ms)
https://www.cryptokitties.co/
134.695
Avoid multiple page redirects — Potential savings of 630 ms
Redirects can cause additional delays before the page can begin loading. Cryptokitties.co should avoid multiple or unnecessary page redirects.
URL Time Spent (Ms)
http://cryptokitties.co/
630
https://www.cryptokitties.co/
0
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.
Remove duplicate modules in JavaScript bundles
Ensure that no duplicate JavaScript modules from bundles exist to reduce bytes consumed by network activity.

Diagnostics

Avoids enormous network payloads — Total size was 2,273 KiB
Large network payloads can cost users money and are linked to long load times.
URL Transfer Size (Bytes)
https://www.cryptokitties.co/vendors.a6d26e7946be9995254d.bundle.js
539108
https://storage.googleapis.com/ck-kitty-image/0x06012c8cf97bead5deae237070f9587f8e7a266d/1971733.svg
246205
https://www.cryptokitties.co/index.df3da66cf1ff62311254.js
226697
https://storage.googleapis.com/ck-kitty-image/0x06012c8cf97bead5deae237070f9587f8e7a266d/1975860.svg
213360
https://storage.googleapis.com/ck-kitty-image/0x06012c8cf97bead5deae237070f9587f8e7a266d/1971702.svg
109371
https://storage.googleapis.com/ck-kitty-image/0x06012c8cf97bead5deae237070f9587f8e7a266d/992151.svg
89514
https://www.cryptokitties.co/images/landing/fanciesBack.png
85746
https://www.cryptokitties.co/images/landing/fanciesMid.png
79212
https://connect.facebook.net/signals/config/708919165966544?v=2.9.32&r=stable
72706
https://www.cryptokitties.co/images/landing/colortunnel.png
69856
Avoid chaining critical requests — 6 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Cryptokitties.co should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
User Timing marks and measures
Make use of the User Timing API to measure an app's real-world performance during key user experiences.
Keep request counts low and transfer sizes small — 89 requests • 2,273 KiB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.
Resource Type Requests Transfer Size (Bytes)
Total
89
2327108
Image
34
1113267
Script
16
1091275
Font
2
63431
Stylesheet
3
33581
Other
33
23494
Document
1
2060
Media
0
0
Third-party
43
965477
Largest Contentful Paint element — 1 element found
The element which was identified as the Largest Contentful Paint.
Element
Get your own Kitty Buy & sell cats with our community Crack puzzles alongside o…
Avoid large layout shifts — 5 elements found
Below is a list of all DOM elements that contribute to the CLS of the page.
Element CLS Contribution
My Profile Activity Search KittyVerse FAQs Player's Guide Latest updates Email …
0.396875
Get your own Kitty Buy & sell cats with our community Crack puzzles alongside o…
0.11705032379272
CryptoKitties Collect and breed furrever friends! Get your own Kitty Buy & se…
0.072957573632539
div
0.049811917761148
Knight Kitty
0.037788351405009
Uses passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
Avoids `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.
Avoid long main-thread tasks — 20 long tasks found
Below is a list of the longest tasks on the main thread, which is useful when identifying the worst input delay contributors.
URL Start Time (Ms) Duration (Ms)
https://www.cryptokitties.co/vendors.a6d26e7946be9995254d.bundle.js
9630
2129
https://www.cryptokitties.co/57.416199e363b68eb613b2.bundle.js
17820
724
https://cdn.ravenjs.com/3.20.1/raven.min.js
13410
562
https://cdn.ravenjs.com/3.20.1/raven.min.js
12539
511
https://cdn.segment.com/analytics.js/v1/WollPzSg2YbRMflpsUycVBC7rxApqsFn/analytics.min.js
11759
297
https://cdn.ravenjs.com/3.20.1/raven.min.js
15052
193
https://cdn.mxpnl.com/libs/mixpanel-2-latest.min.js
13050
122
https://connect.facebook.net/signals/config/708919165966544?v=2.9.32&r=stable
5850
121
https://www.cryptokitties.co/78.d26e1fcf07cc9875fc1f.bundle.js
18544
96
https://www.googletagmanager.com/gtm.js?id=GTM-MPBB7JJ
2844
86
https://cdn.ravenjs.com/3.20.1/raven.min.js
14130
79
https://www.cryptokitties.co/vendors.a6d26e7946be9995254d.bundle.js
8019
73
https://cdn.ravenjs.com/3.20.1/raven.min.js
8314
68
Unattributable
677
68
https://www.google-analytics.com/analytics.js
4170
65
https://connect.facebook.net/en_US/fbevents.js
4320
63
https://www.cryptokitties.co/vendors.a6d26e7946be9995254d.bundle.js
8135
60
https://cdn.ravenjs.com/3.20.1/raven.min.js
13172
58
https://cdn.ravenjs.com/3.20.1/raven.min.js
8488
58
https://www.googletagmanager.com/gtm.js?id=GTM-MPBB7JJ
2790
54
Avoid non-composited animations
It is recommended to avoid non-composited animations which are often janky and increase CLS.
Avoids large JavaScript libraries with smaller alternatives — 0 large libraries found
It is recommended to work with smaller JavaScript libraries to reduce your bundle size and avoid poor performance.

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.
Timing budget
It is advised to set a timing budget to monitor the performance of your site.

Other

Network Requests
Below is a list of network requests that were made during page load.
URL Start Time (Ms) End Time (Ms) Transfer Size (Bytes) Resource Size (Bytes) Status Code MIME Type Resource Type
http://cryptokitties.co/
0
43.274000054225
270
0
307
text/html
https://www.cryptokitties.co/
43.72900002636
177.42700001691
2060
3676
200
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Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.
Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.
Tasks
Below is a list of the top-level main thread tasks that executed during page load.
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210.712
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6.813
2436.761
6.418
2453.398
29.189
2483.045
6.736
2503.308
10.716
2519.997
6.298
2536.816
9.808
2553.655
6.302
2570.049
24.8
2595.125
6.205
2603.379
6.007
2620.166
7.097
2636.661
6.808
2653.429
7.518
2670.246
6.801
2686.691
6.643
2703.485
11.091
2720.06
5.903
2737.058
10.556
2753.269
5.564
2770.135
7.107
2786.637
9.473
2820.01
16.453
2869.918
7.174
2903.419
7.987
2953.244
9.239
2986.631
10.049
3036.592
7.005
3069.917
7.467
3119.894
5.797
3153.196
7.523
3203.196
9.338
3286.684
7.711
3319.905
7.457
3370.295
10.025
3403.176
5.029
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data

Opportunities

Eliminate render-blocking resources — Potential savings of 210 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. Cryptokitties.co should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.
URL Transfer Size (Bytes) Potential Savings (Ms)
https://www.cryptokitties.co/92.e52136a8975c4bcca0f6.css
2224
180
https://www.cryptokitties.co/index.e28620011227c1e39391.css
27731
1080
Properly size images — Potential savings of 127 KiB
Images can slow down the page's load time. Cryptokitties.co should consider serving more appropriate-sized images.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://www.cryptokitties.co/images/landing/fanciesMid.png
78486
55578
https://www.cryptokitties.co/images/landing/fanciesFront.png
65306
46245
https://www.cryptokitties.co/profile/profile-8.png
14286
11552
https://www.cryptokitties.co/profile/profile-12.png
11847
9579
https://www.cryptokitties.co/profile/profile-11.png
9045
7314
Remove unused CSS — Potential savings of 25 KiB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Cryptokitties.co should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://www.cryptokitties.co/index.e28620011227c1e39391.css
27731
25768
Serve images in next-gen formats — Potential savings of 91 KiB
Image formats like PNG and JPEG have poor compression when compared to other next-gen formats, such as JPEG 200, JPEG XR and WebP.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://www.cryptokitties.co/images/landing/fanciesFront.png
65306
25320
https://www.cryptokitties.co/images/landing/colortunnel.png
69130
22534
https://www.cryptokitties.co/images/landing/fanciesMid.png
78486
20350
https://www.cryptokitties.co/images/landing/fanciesBack.png
85020
15546
https://www.cryptokitties.co/profile/profile-8.png
14286
9408
Avoid serving legacy JavaScript to modern browsers — Potential savings of 31 KiB
Polyfills and transforms enable legacy browsers to use new JavaScript features. For bundled JavaScript it is recommended to adopt a modern script deployment strategy using module/nomodule feature detection. This will reduce the amount of code shipped to modern browsers.
URL Potential Savings (Bytes)
https://connect.facebook.net/signals/config/708919165966544?v=2.9.32&r=stable
12048
https://cdn.mxpnl.com/libs/mixpanel-2-latest.min.js
6700
https://www.cryptokitties.co/vendors.a6d26e7946be9995254d.bundle.js
6464
https://cdn.segment.com/analytics.js/v1/WollPzSg2YbRMflpsUycVBC7rxApqsFn/analytics.min.js
3813
https://www.cryptokitties.co/index.df3da66cf1ff62311254.js
2970
https://connect.facebook.net/en_US/fbevents.js
45
https://www.cryptokitties.co/57.416199e363b68eb613b2.bundle.js
22

Diagnostics

Avoid an excessive DOM size — 927 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.
Statistic Element Value
Total DOM Elements
927
Maximum DOM Depth
SHOW DETAILS
26
Maximum Child Elements
SHOW DETAILS
94

Metrics

First Contentful Paint — 9.2 s
The time taken for the first image or text on the page to be rendered.
Speed Index — 9.2 s
The time taken for the page contents to be visibly populated.
Largest Contentful Paint — 16.7 s
The timing of the largest text or image that is painted.
Time to Interactive — 16.4 s
The time taken for the page to become fully interactive.
Total Blocking Time — 3,560 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).
Cumulative Layout Shift — 0.732
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Other

First CPU Idle — 14.1 s
The time taken for the page's main thread to be quiet enough to handle input.
Max Potential First Input Delay — 2,130 ms
Users could experience a delay when interacting with the page.
First Meaningful Paint — 10.1 s
The time taken for the primary content of the page to be rendered.
Estimated Input Latency — 1,320 ms
The time taken for the page to respond to user input (during the busiest 5 second window of page load). Users are likely to perceive cryptokitties.co as laggy when the latency is higher than 0.05 seconds.
First Contentful Paint (3G) — 17609 ms
The time taken for the first image or text on the page to be rendered while on a 3G network.

Opportunities

Remove unused JavaScript — Potential savings of 435 KiB
It is advised to remove unused JavaScript in order to reduce bytes consumed by network activity.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://www.cryptokitties.co/vendors.a6d26e7946be9995254d.bundle.js
539108
266929
https://www.cryptokitties.co/index.df3da66cf1ff62311254.js
226697
102513
https://connect.facebook.net/signals/config/708919165966544?v=2.9.32&r=stable
72706
53251
https://www.googletagmanager.com/gtm.js?id=GTM-MPBB7JJ
49072
22267
Preload key requests — Potential savings of 7,830 ms
Key requests can be preloaded by using '<link rel=preload>'. Cryptokitties.co should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
URL Potential Savings (Ms)
https://www.cryptokitties.co/57.a48a5e90919a53a6c12b.css
7830
https://www.cryptokitties.co/fonts/Calibre-Regular.woff2
780
https://www.cryptokitties.co/fonts/Calibre-Medium.woff2
600

Diagnostics

Serve static assets with an efficient cache policy — 39 resources found
Cryptokitties.co can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.
URL Cache TTL (Ms) Transfer Size (Bytes)
https://cdn.segment.com/analytics.js/v1/WollPzSg2YbRMflpsUycVBC7rxApqsFn/analytics.min.js
300000
67720
https://cdn.mxpnl.com/libs/mixpanel-2-latest.min.js
600000
28264
https://connect.facebook.net/signals/config/708919165966544?v=2.9.32&r=stable
1200000
72706
https://connect.facebook.net/en_US/fbevents.js
1200000
24915
https://www.google-analytics.com/analytics.js
7200000
19452
https://www.cryptokitties.co/vendors.a6d26e7946be9995254d.bundle.js
14400000
539108
https://www.cryptokitties.co/index.df3da66cf1ff62311254.js
14400000
226697
https://www.cryptokitties.co/images/landing/fanciesBack.png
14400000
85746
https://www.cryptokitties.co/images/landing/fanciesMid.png
14400000
79212
https://www.cryptokitties.co/images/landing/colortunnel.png
14400000
69856
https://www.cryptokitties.co/images/landing/fanciesFront.png
14400000
66031
https://www.cryptokitties.co/fonts/Calibre-Regular.woff2
14400000
32253
https://www.cryptokitties.co/images/breeding-heart/breeding-kitties.svg
14400000
32102
https://www.cryptokitties.co/fonts/Calibre-Medium.woff2
14400000
31178
https://www.cryptokitties.co/index.e28620011227c1e39391.css
14400000
27731
https://www.cryptokitties.co/images/loader.gif
14400000
23746
https://www.cryptokitties.co/images/ether-diamond.gif
14400000
20556
https://www.cryptokitties.co/57.416199e363b68eb613b2.bundle.js
14400000
18350
https://www.cryptokitties.co/profile/profile-8.png
14400000
15010
https://www.cryptokitties.co/profile/profile-12.png
14400000
12571
https://www.cryptokitties.co/4.c211d337676a5736e335.bundle.js
14400000
12238
https://www.cryptokitties.co/profile/profile-11.png
14400000
9768
https://www.cryptokitties.co/images/kitty-eth.svg
14400000
7974
https://www.cryptokitties.co/images/pattern-tile.svg
14400000
5556
https://www.cryptokitties.co/57.a48a5e90919a53a6c12b.css
14400000
3626
https://www.cryptokitties.co/icons/coins.svg
14400000
3350
https://www.cryptokitties.co/78.d26e1fcf07cc9875fc1f.bundle.js
14400000
2837
https://www.cryptokitties.co/icons/logo.svg
14400000
2395
https://www.cryptokitties.co/92.e52136a8975c4bcca0f6.css
14400000
2224
https://www.cryptokitties.co/icons/games.svg
14400000
2166
https://www.cryptokitties.co/icons/puzzles.svg
14400000
2006
https://www.cryptokitties.co/icons/eggplant.svg
14400000
1874
https://www.cryptokitties.co/icons/gift.svg
14400000
1755
https://www.cryptokitties.co/icons/eggCrack.svg
14400000
1698
https://www.cryptokitties.co/icons/paw.svg
14400000
1423
https://www.cryptokitties.co/icons/icon-discord-white.svg
14400000
1221
https://www.cryptokitties.co/icons/icon-message.svg
14400000
974
https://www.cryptokitties.co/images/landing/bgpattern.svg
14400000
956
https://www.cryptokitties.co/icons/cross.svg
14400000
878
Reduce JavaScript execution time — 7.3 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
URL Total CPU Time (Ms) Script Evaluation (Ms) Script Parse (Ms)
https://www.cryptokitties.co/index.df3da66cf1ff62311254.js
3338.0439999999
3151.7599999999
56.504
https://cdn.ravenjs.com/3.20.1/raven.min.js
2094.58
1655.244
7.608
https://www.cryptokitties.co/57.416199e363b68eb613b2.bundle.js
1571.192
1199.792
17.084
Unattributable
708.44
6.804
0.556
https://www.cryptokitties.co/
601.048
15.288
5.948
https://www.cryptokitties.co/vendors.a6d26e7946be9995254d.bundle.js
485.272
79.376
107.824
https://cdn.segment.com/analytics.js/v1/WollPzSg2YbRMflpsUycVBC7rxApqsFn/analytics.min.js
361.704
314.18
34.432
https://www.googletagmanager.com/gtm.js?id=GTM-MPBB7JJ
174.132
154.952
13.36
https://connect.facebook.net/signals/config/708919165966544?v=2.9.32&r=stable
164.832
117.916
16.636
https://www.google-analytics.com/analytics.js
142.636
127.056
4.38
https://cdn.mxpnl.com/libs/mixpanel-2-latest.min.js
111.74
85.792
8.584
https://www.cryptokitties.co/78.d26e1fcf07cc9875fc1f.bundle.js
95.848
91.652
2.824
https://connect.facebook.net/en_US/fbevents.js
62.792
53.216
7.016
Minimize main-thread work — 10.0 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
Category Time Spent (Ms)
Script Evaluation
7076.2159999999
Other
1092.296
Style & Layout
609.192
Rendering
466.66
Garbage Collection
365.424
Script Parsing & Compilation
292.104
Parse HTML & CSS
93.676
Ensure text remains visible during webfont load
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.
URL Potential Savings (Ms)
https://www.cryptokitties.co/fonts/Calibre-Regular.woff2
163.37399999611
https://www.cryptokitties.co/fonts/Calibre-Medium.woff2
52.113999961875
Reduce the impact of third-party code — Third-party code blocked the main thread for 490 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.
Third-Party Transfer Size (Bytes) Main-Thread Blocking Time (Ms)
SHOW DETAILS
69980
198.824
SHOW DETAILS
10649
120.388
SHOW DETAILS
20688
66.648
SHOW DETAILS
98635
48.228
SHOW DETAILS
28779
29.68
SHOW DETAILS
49072
27.832
SHOW DETAILS
659196
0
SHOW DETAILS
16495
0
SHOW DETAILS
3473
0
SHOW DETAILS
2937
0
81

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of cryptokitties.co. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.
The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.
`[id]` attributes on active, focusable elements are unique
Ensure all focusable elements have a unique id value to allow them to be visible to users of assistive technologies, like a screen reader.
Heading elements appear in a sequentially-descending order
Properly order all headers and do not skip heading levels to better the navigation and readability for users of assistive technologies, like a screen reader.
No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`[aria-*]` attributes match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.
`[aria-hidden="true"]` is not present on the document `<body>`
If aria-hidden=true is set on the document body, assistive technologies, like a screen reader will work inconsistently.
`[aria-hidden="true"]` elements do not contain focusable descendents
Interactive elements within an aria-hidden=true element are unavailable to users of assistive technologies, like a screen reader.
ARIA input fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when an input field does not have an accessible name specified.
`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.
`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.
`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.
ARIA toggle fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when a toggle field does not have an accessible name specified.
`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.
`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.
ARIA IDs are unique
Ensure all ARIA ID values are unique to prevent elements from being overlooked by assistive technologies, like a screen reader.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.
Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
It is advised to not include data elements in tables which are used for layout purposes, as it may create confusion for screen reader and other assistive technology users.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Names and labels

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
No form fields have multiple labels
Having multiple labels for form fields can be confusing to assistive technologies, like a screen reader.
`<frame>` or `<iframe>` elements have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
Form elements have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
`<object>` elements have `[alt]` text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Internationalization and localization

`<html>` element has a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.
`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.
`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
Cryptokitties.co may provide assistance to deaf or hearing-impaired users with captions on videos.
`<video>` elements contain a `<track>` element with `[kind="description"]`
Cryptokitties.co may provide relevant information that dialogue cannot, by using audio descriptions.

Names and labels

Buttons do not have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.
Failing Elements
div
div
div
div
Links do not have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.

Contrast

Background and foreground colors do not have a sufficient contrast ratio.
Many (if not most) users find low-contrast text difficult or impossible to read.
Failing Elements
Events Page
Start
Get your own Kitty
CryptoKitties is a game centered around breedable, collectible, and oh-so-adora…
In CryptoKitties you can breed and adopt Kitties of all colours and shapes. Cre…
115 kitties 31
31
Curated by
32 kitties 12
12
Curated by
18 kitties 12
12
Curated by
6 kitties 9
Curated by
Join our Kitten Class and learn how to get started with breeding CryptoKitties …
Teach me how to breed
My Profile
Activity
Search
KittyVerse
FAQs
Player's Guide
Latest updates
Email us
About
Press
Tech details
White Pa-purr
Our Newsletter
Cheeze Wizards
NBA Top Shot
Flow Blockchain
Reddit
Twitter
YouTube
Discord
Pick of the litter at Dapper Labs
View our job openings
Terms of use
Privacy policy

Best practices

`[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.
Failing Elements
meta

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.
Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.
Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.
The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.
User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.
Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.
Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.
Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.
Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.
HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.
86

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that cryptokitties.co should incorporate. This includes practices such as protecting pages with HTTPS.

Audits

Links to cross-origin destinations are safe
Improve performance and prevent security vulnerabilities by adding rel="noopener" and rel="noreferrer" to external links.
Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids front-end JavaScript libraries with known security vulnerabilities
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.

Audits

Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.
Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.
Serves images with appropriate resolution
For maximum image clarity, ensure images have natural dimensions and are proportional to the display size and pixel ratio.
Fonts with `font-display: optional` are preloaded
It is recommended that optional fonts are preloaded.

Audits

Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.
Properly defines charset
It is advised to declare a character encoding, optionally via a <meta> tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header.

Audits

Avoids Application Cache
Application cache is deprecated and is no longer recommended.
Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Name Version
React
core-js
2.5.7: global, 2.5.7: pure, 3.0.0: pure
Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.
No browser errors logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.

Audits

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://cryptokitties.co/

Audits

Registers an `unload` listener
The 'unload' event does not fire reliably, causing issues with browser optimizations such as the Back-Forward Cache. It is recommended that 'pagehide' or 'visibilitychange' events are used instead.
URL
SHOW DETAILS
SHOW DETAILS
Missing source maps for large first-party JavaScript
Consider deploying source maps for added benefits such as the ability to debug while in production.
URL Map URL
https://www.cryptokitties.co/vendors.a6d26e7946be9995254d.bundle.js
https://www.cryptokitties.co/index.df3da66cf1ff62311254.js
https://cdn.ravenjs.com/3.20.1/raven.min.js
https://cdn.ravenjs.com/3.20.1/raven.min.js.map
87

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for cryptokitties.co. This includes optimizations such as providing meta data.

Mobile Friendly

Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of cryptokitties.co on mobile screens.
Document uses legible font sizes — 100% legible text
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.
Source Selector % of Page Text Font Size
SHOW DETAILS
100.00%
≥ 12px

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
Document has a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.
Links have descriptive text
Make use of descriptive link text to assist search engines in understanding the content.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.
Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.
Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.
Links are crawlable
Ensure that the 'href' attribute of anchor elements links to the appropriate destination. This allows for more pages of the site to be discovered by search engines.
Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.

Crawling and Indexing

robots.txt is not valid — 52 errors found
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.
Line # Content Error
1
<!DOCTYPE html>
Syntax not understood
2
<html lang="en">
Syntax not understood
4
<head>
Syntax not understood
5
<meta charset="UTF-8">
Syntax not understood
6
<title>CryptoKitties | Collect and breed digital cats!</title>
Syntax not understood
7
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
Syntax not understood
8
<meta name="description" content="Collect and trade CryptoKitties in one of the world’s first blockchain games. Breed your rarest cats to create the purrfect furry friend. The future is meow!">
Syntax not understood
9
<meta name="author" content="CryptoKitties">
Syntax not understood
10
<meta name="twitter:card" content="summary_large_image" />
Unknown directive
11
<meta name="twitter:site" content="@CryptoKitties" />
Unknown directive
12
<meta name="twitter:title" content="CryptoKitties | Collect and breed digital cats!" />
Unknown directive
13
<meta name="twitter:description" content="Collect and trade CryptoKitties in one of the world’s first blockchain games. Breed your rarest cats to create the purrfect furry friend. The future is meow!" />
Unknown directive
14
<meta name="twitter:image" content="https://www.cryptokitties.co/images/share.png" />
Unknown directive
15
<meta name="twitter:url" content="https://www.cryptokitties.co" />
Unknown directive
16
<meta name="google-site-verification" content="sZu6_ZGzpfvQSOhqx_tJeDNK6xsXaIOs97D7XdoTmK4" />
Syntax not understood
17
<meta property="og:type" content="website" />
Unknown directive
18
<meta property="og:site_name" content="CryptoKitties" />
Unknown directive
19
<meta property="og:title" content="CryptoKitties | Collect and breed digital cats!" />
Unknown directive
20
<meta property="og:description" content="Collect and trade CryptoKitties in one of the world’s first blockchain games. Breed your rarest cats to create the purrfect furry friend. The future is meow!" />
Unknown directive
21
<meta property="og:image" content="https://www.cryptokitties.co/images/share.png" />
Unknown directive
22
<meta property="og:url" content="https://www.cryptokitties.co" />
Unknown directive
23
<link rel="shortcut icon" href="/icons/favicon.ico">
Syntax not understood
24
<link rel="apple-touch-icon" sizes="57x57" href="/icons/apple-icon-57x57.png">
Syntax not understood
25
<link rel="apple-touch-icon" sizes="60x60" href="/icons/apple-icon-60x60.png">
Syntax not understood
26
<link rel="apple-touch-icon" sizes="72x72" href="/icons/apple-icon-72x72.png">
Syntax not understood
27
<link rel="apple-touch-icon" sizes="76x76" href="/icons/apple-icon-76x76.png">
Syntax not understood
28
<link rel="apple-touch-icon" sizes="114x114" href="/icons/apple-icon-114x114.png">
Syntax not understood
29
<link rel="apple-touch-icon" sizes="120x120" href="/icons/apple-icon-120x120.png">
Syntax not understood
30
<link rel="apple-touch-icon" sizes="144x144" href="/icons/apple-icon-144x144.png">
Syntax not understood
31
<link rel="apple-touch-icon" sizes="152x152" href="/icons/apple-icon-152x152.png">
Syntax not understood
32
<link rel="apple-touch-icon" sizes="180x180" href="/icons/apple-icon-180x180.png">
Syntax not understood
33
<link rel="icon" type="image/png" sizes="192x192" href="/icons/android-icon-192x192.png">
Syntax not understood
35
<!-- Google Tag Manager -->
Syntax not understood
36
<script>
Syntax not understood
37
(function (w, d, s, l, i) {
Syntax not understood
38
w[l] = w[l] || []; w[l].push({
Syntax not understood
39
'gtm.start':
Unknown directive
40
new Date().getTime(), event: 'gtm.js'
Unknown directive
41
}); var f = d.getElementsByTagName(s)[0],
Syntax not understood
42
j = d.createElement(s), dl = l != 'dataLayer' ? '&l=' + l : ''; j.async = true; j.src =
Unknown directive
43
'https://www.googletagmanager.com/gtm.js?id=' + i + dl; f.parentNode.insertBefore(j, f);
Unknown directive
44
})(window, document, 'script', 'dataLayer', window.location.host === "www.cryptokitties.co" ? 'GTM-MPBB7JJ' : 'GTM-5LGLQ56');
Unknown directive
45
</script>
Syntax not understood
46
<!-- End Google Tag Manager -->
Syntax not understood
47
<link href="/92.e52136a8975c4bcca0f6.css" rel="stylesheet"><link href="/index.e28620011227c1e39391.css" rel="stylesheet"></head>
Syntax not understood
49
<body>
Syntax not understood
50
<div id="app"></div>
Syntax not understood
51
<!-- Sentry logging -->
Syntax not understood
52
<script src="https://cdn.ravenjs.com/3.20.1/raven.min.js" crossorigin="anonymous"></script>
Unknown directive
53
<!-- End Sentry logging -->
Syntax not understood
54
<script type="text/javascript" src="/vendors.a6d26e7946be9995254d.bundle.js"></script><script type="text/javascript" src="/index.df3da66cf1ff62311254.js"></script></body>
Syntax not understood
56
</html>
Syntax not understood

Mobile Friendly

Tap targets are not sized appropriately — 34% appropriately sized tap targets
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.
Tap Target Size Overlapping Target
FAQs
34x20
KittyVerse
FAQs
34x20
Player's Guide
Press
35x20
Tech details
Press
35x20
About
Reddit
41x20
Facebook
Reddit
41x20
Twitter
Search
42x20
Activity
Search
42x20
KittyVerse
Twitch
42x20
Discord
Twitter
44x20
YouTube
Activity
51x20
My Profile
Player's Guide
91x20
Latest updates
Email us
54x20
Latest updates
Tech details
76x20
White Pa-purr
White Pa-purr
87x20
Our Newsletter
Our Newsletter
94x20
Cheeze Wizards
Cheeze Wizards
100x20
NBA Top Shot
NBA Top Shot
90x20
Flow Blockchain
YouTube
55x20
Instagram
Discord
49x20
Instagram
Terms of use
330x22
Privacy policy

Manual Checks

Structured data is valid
Structured data can be validated through the use of the Structured Data Testing Tool and the Structured Data Linter.
21

Progressive Web App

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of cryptokitties.co. This includes details about web app manifests.

PWA Optimized

Redirects HTTP traffic to HTTPS
It is advised to redirect all HTTP traffic to HTTPS, in order to enable secure web features for all users.
Content is sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of cryptokitties.co on mobile screens.
Provides a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.

Fast and reliable

Page load is not fast enough on mobile networks — Interactive at 16.4 s
Ensure that the page loads fast enough over a cellular network, to ensure good mobile user experience.
Current page does not respond with a 200 when offline
In order for Progressive Web Apps to be made available offline, ensure that the app is using a service worker.
`start_url` does not respond with a 200 when offline
Consider using a service worker for Progressive Web Apps to ensure greater reliability for the user, in the case of poor network conditions.

Installable

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://cryptokitties.co/
Does not register a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.
Web app manifest does not meet the installability requirements
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
View Data

PWA Optimized

Is not configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Does not set a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data
Does not provide fallback content when JavaScript is not available
Apps should display alternative content for when JavaScript is disabled.
Manifest doesn't have a maskable icon
Maskable icons are great to ensure that images fill the entire shape when installing the app on a device.

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.
Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.
Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.
Hosting

Server Location

Server IP Address: 35.237.183.119
Continent:
Country:
Region:
City:
Longitude:
Latitude:
Currencies:
Languages:

Web Hosting Provider

Name IP Address
Google LLC
Registration

Domain Registrant

Private Registration: No
Name:
Organization:
Country:
City:
State:
Post Code:
Email:
Phone:
Note: Registration information is derived from various sources and may be inaccurate.

Domain Registrar

Name IP Address
.CO Internet, S.A.S. 190.60.223.37
Security

Visitor Safety

Mature Content: Not Likely
McAfee WebAdvisor Rating: Safe
WOT Rating:
WOT Trustworthiness:
WOT Child Safety:
Note: Safety information is not guaranteed.

SSL/TLS Certificate

Issued To: sni.cloudflaressl.com
Issued By: Cloudflare Inc ECC CA-3
Valid From: 9th September, 2020
Valid To: 9th September, 2021
Subject: CN = sni.cloudflaressl.com
O = Cloudflare, Inc.
L = San Francisco
S = US
Hash: 4d04c09a
Issuer: CN = Cloudflare Inc ECC CA-3
O = Cloudflare, Inc.
S = US
Version: 2
Serial Number: 16916087813591498236195339769155901503
Serial Number (Hex): 0CB9EB8586DF6C1166155A6CC97B583F
Valid From: 9th September, 2024
Valid To: 9th September, 2024
Signature Algorithm (Short Name): ecdsa-with-SHA256
Signature Algorithm (Long Name): ecdsa-with-SHA256
Authority Key Identifier: keyid:A5:CE:37:EA:EB:B0:75:0E:94:67:88:B4:45:FA:D9:24:10:87:96:1F
Extended Key Usage: TLS Web Server Authentication, TLS Web Client Authentication
CRL Distribution Points:
Full Name:
URI:http://crl3.digicert.com/CloudflareIncECCCA-3.crl

Full Name:
URI:http://crl4.digicert.com/CloudflareIncECCCA-3.crl
Certificate Policies: Policy: 2.16.840.1.114412.1.1
CPS: https://www.digicert.com/CPS
Policy: 2.23.140.1.2.2
Authority Information Access: OCSP - URI:http://ocsp.digicert.com
CA Issuers - URI:http://cacerts.digicert.com/CloudflareIncECCCA-3.crt
SCT List: Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : F6:5C:94:2F:D1:77:30:22:14:54:18:08:30:94:56:8E:
E3:4D:13:19:33:BF:DF:0C:2F:20:0B:CC:4E:F1:64:E3
Timestamp : Sep 9 22:23:22.623 2020 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:45:02:20:2B:A2:5A:5E:EF:11:2A:22:0D:48:50:06:
B9:B5:EF:FB:1D:3C:79:1A:89:F4:2D:25:41:97:70:36:
49:FC:CD:D2:02:21:00:8C:30:86:A5:F1:9F:DF:56:57:
9B:FB:C1:D8:3D:A4:64:2E:FB:33:D0:63:29:57:4F:8B:
4C:22:95:FD:7A:1F:FC
Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : 5C:DC:43:92:FE:E6:AB:45:44:B1:5E:9A:D4:56:E6:10:
37:FB:D5:FA:47:DC:A1:73:94:B2:5E:E6:F6:C7:0E:CA
Timestamp : Sep 9 22:23:22.668 2020 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:45:02:21:00:B7:6F:EE:B7:DE:24:B3:F6:66:F2:CE:
B3:84:C9:BD:14:55:99:63:8E:2B:90:0D:CA:70:9A:20:
EC:2E:2D:33:39:02:20:5F:B9:9F:9C:70:56:59:55:71:
7D:73:1B:52:CF:A4:36:2C:4D:4B:60:08:2C:E1:9D:BA:
A4:C7:1C:FC:0F:7E:8C
Key Usage: Digital Signature
Basic Constraints: CA:FALSE
Subject Alternative Name: DNS:sni.cloudflaressl.com
DNS:www.cryptokitties.co
Technical

DNS Lookup

A Records

Host IP Address Class TTL
cryptokitties.co. 35.237.183.119 IN 21599

NS Records

Host Nameserver Class TTL
cryptokitties.co. ns-1221.awsdns-24.org. IN 21599
cryptokitties.co. ns-1818.awsdns-35.co.uk. IN 21599
cryptokitties.co. ns-275.awsdns-34.com. IN 21599
cryptokitties.co. ns-907.awsdns-49.net. IN 21599

MX Records

Priority Host Server Class TTL
1 cryptokitties.co. aspmx.l.google.com. IN 299
10 cryptokitties.co. aspmx2.googlemail.com. IN 299
10 cryptokitties.co. aspmx3.googlemail.com. IN 299
5 cryptokitties.co. alt1.aspmx.l.google.com. IN 299
5 cryptokitties.co. alt2.aspmx.l.google.com. IN 299

SOA Records

Domain Name Primary NS Responsible Email TTL
cryptokitties.co. ns-1221.awsdns-24.org. awsdns-hostmaster.amazon.com. 899

TXT Records

Host Value Class TTL
cryptokitties.co. facebook-domain-verification=21o3g5ferjxljoik8yrxgxyexzr5vj IN 1799
cryptokitties.co. google-site-verification=02eAvTmcIChwR-giqQ5w8OMXrNo3shucbRID-6wHZEE IN 1799
cryptokitties.co. google-site-verification=RRKDirS0lunUVKNBSovwnODeU0QPmDQ4XEor7UerJF4 IN 1799
cryptokitties.co. postman-domain-verification=2ffcff6f0bee328f5e705bf99ec0d1f455e4d370bb7b2ea6028248c896991247517911867bc265ee52a9e618f645a0a0705dfba408427c5f47894eec1767f773 IN 1799
cryptokitties.co. v=spf1 IN 1799

HTTP Response Headers

HTTP-Code: HTTP/1.1 200 OK
Date: 12th January, 2021
Content-Type: text/html; charset=utf-8
Server: cloudflare
Connection: keep-alive
Set-Cookie: *
Access-Control-Allow-Origin: *
Vary: Accept-Encoding
Via: 1.1 vegur
X-Frame-Options: SAMEORIGIN
X-Powered-By: Express
CF-Cache-Status: DYNAMIC
cf-request-id: 0798ee405f00003dcc9a1de000000001
Expect-CT: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
Strict-Transport-Security: max-age=15552000; includeSubDomains
X-Content-Type-Options: nosniff
CF-RAY: 6108197a2e813dcc-EWR

Whois Lookup

Created: 13th September, 2017
Changed: 17th August, 2020
Expires: 9th December, 2021
Registrar: CCI REG S.A.
Status: clientTransferProhibited
Nameservers: ns-1221.awsdns-24.org
ns-1818.awsdns-35.co.uk
ns-275.awsdns-34.com
ns-907.awsdns-49.net
Owner Name: REDACTED FOR PRIVACY
Owner Organization: Domain Protection Services, Inc.
Owner Street: REDACTED FOR PRIVACY
REDACTED FOR PRIVACY
REDACTED FOR PRIVACY
Owner Post Code: REDACTED FOR PRIVACY
Owner City: REDACTED FOR PRIVACY
Owner State: CO
Owner Country: US
Owner Phone: REDACTED FOR PRIVACY
Owner Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Admin Name: REDACTED FOR PRIVACY
Admin Organization: REDACTED FOR PRIVACY
Admin Street: REDACTED FOR PRIVACY
REDACTED FOR PRIVACY
REDACTED FOR PRIVACY
Admin Post Code: REDACTED FOR PRIVACY
Admin City: REDACTED FOR PRIVACY
Admin State: REDACTED FOR PRIVACY
Admin Country: REDACTED FOR PRIVACY
Admin Phone: REDACTED FOR PRIVACY
Admin Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Tech Name: REDACTED FOR PRIVACY
Tech Organization: REDACTED FOR PRIVACY
Tech Street: REDACTED FOR PRIVACY
REDACTED FOR PRIVACY
REDACTED FOR PRIVACY
Tech Post Code: REDACTED FOR PRIVACY
Tech City: REDACTED FOR PRIVACY
Tech State: REDACTED FOR PRIVACY
Tech Country: REDACTED FOR PRIVACY
Tech Phone: REDACTED FOR PRIVACY
Tech Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Full Whois: Domain Name: cryptokitties.co
Registry Domain ID: D365589970-CO
Registrar-Reseller Name: GANDI SAS
Registrar WHOIS Server: whois.ccireg.com
Registrar URL: www.ccireg.com
Updated Date: 2020-08-17T21:03:55Z
Creation Date: 2017-09-13T23:13:58Z
Registry Expiry Date: 2021-09-12T23:59:59Z
Registrar: CCI REG S.A.
Registrar IANA ID: 1607
Registrar Abuse Contact Email:
Registrar Abuse Contact Phone:
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registry Registrant ID: REDACTED FOR PRIVACY
Registrant Name: REDACTED FOR PRIVACY
Registrant Organization: Domain Protection Services, Inc.
Registrant Street: REDACTED FOR PRIVACY
Registrant Street: REDACTED FOR PRIVACY
Registrant Street: REDACTED FOR PRIVACY
Registrant City: REDACTED FOR PRIVACY
Registrant State/Province: CO
Registrant Postal Code: REDACTED FOR PRIVACY
Registrant Country: US
Registrant Phone: REDACTED FOR PRIVACY
Registrant Phone Ext: REDACTED FOR PRIVACY
Registrant Fax: REDACTED FOR PRIVACY
Registrant Fax Ext: REDACTED FOR PRIVACY
Registrant Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Registry Admin ID: REDACTED FOR PRIVACY
Admin Name: REDACTED FOR PRIVACY
Admin Organization: REDACTED FOR PRIVACY
Admin Street: REDACTED FOR PRIVACY
Admin Street: REDACTED FOR PRIVACY
Admin Street: REDACTED FOR PRIVACY
Admin City: REDACTED FOR PRIVACY
Admin State/Province: REDACTED FOR PRIVACY
Admin Postal Code: REDACTED FOR PRIVACY
Admin Country: REDACTED FOR PRIVACY
Admin Phone: REDACTED FOR PRIVACY
Admin Phone Ext: REDACTED FOR PRIVACY
Admin Fax: REDACTED FOR PRIVACY
Admin Fax Ext: REDACTED FOR PRIVACY
Admin Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Registry Tech ID: REDACTED FOR PRIVACY
Tech Name: REDACTED FOR PRIVACY
Tech Organization: REDACTED FOR PRIVACY
Tech Street: REDACTED FOR PRIVACY
Tech Street: REDACTED FOR PRIVACY
Tech Street: REDACTED FOR PRIVACY
Tech City: REDACTED FOR PRIVACY
Tech State/Province: REDACTED FOR PRIVACY
Tech Postal Code: REDACTED FOR PRIVACY
Tech Country: REDACTED FOR PRIVACY
Tech Phone: REDACTED FOR PRIVACY
Tech Phone Ext: REDACTED FOR PRIVACY
Tech Fax: REDACTED FOR PRIVACY
Tech Fax Ext: REDACTED FOR PRIVACY
Tech Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Name Server: ns-1818.awsdns-35.co.uk
Name Server: ns-907.awsdns-49.net
Name Server: ns-275.awsdns-34.com
Name Server: ns-1221.awsdns-24.org
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2021-01-12T16:02:04Z <<<

For more information on Whois status codes, please visit https://icann.org/epp

The above WHOIS results have been redacted to remove potential personal data. The full WHOIS output may be available to individuals and organisations with a legitimate interest in accessing this data not outweighed by the fundamental privacy rights of the data subject. To find out more, or to make a request for access, please visit: RDDSrequest.nic.co.

.CO Internet, S.A.S., the Administrator for .CO, has collected this information for the WHOIS database through Accredited Registrars. This information is provided to you for informational purposes only and is designed to assist persons in determining contents of a domain name registration record in the .CO Internet registry database. .CO Internet makes this information available to you "as is" and does not guarantee its accuracy.

By submitting a WHOIS query, you agree that you will use this data only for lawful purposes and that, under no circumstances will you use this data: (1) to allow, enable, or otherwise support the transmission of mass unsolicited, commercial advertising or solicitations via direct mail, electronic mail, or by telephone; (2) in contravention of any applicable data and privacy protection laws; or (3) to enable high volume, automated, electronic processes that apply to the registry (or its systems). Compilation, repackaging, dissemination, or other use of the WHOIS database in its entirety, or of a substantial portion thereof, is not allowed without .CO Internet's prior written permission. .CO Internet reserves the right to modify or change these conditions at any time without prior or subsequent notification of any kind. By executing this query, in any manner whatsoever, you agree to abide by these terms. In some limited cases, domains that might appear as available in whois might not actually be available as they could be already registered and the whois not yet updated and/or they could be part of the Restricted list. In this cases, performing a check through your Registrar's (EPP check) will give you the actual status of the domain. Additionally, domains currently or previously used as extensions in 3rd level domains will not be available for registration in the 2nd level. For example, org.co, mil.co, edu.co, com.co, net.co, nom.co, arts.co, firm.co, info.co, int.co, web.co, rec.co, co.co.

NOTE: FAILURE TO LOCATE A RECORD IN THE WHOIS DATABASE IS NOT INDICATIVE OF THE AVAILABILITY OF A DOMAIN NAME. All domain names are subject to certain additional domain name registration rules. For details, please visit our site at www.cointernet.co <http://www.cointernet.co>.

View Raw Whois

Nameservers

Name IP Address
ns-1221.awsdns-24.org 205.251.196.197
ns-1818.awsdns-35.co.uk 205.251.199.26
ns-275.awsdns-34.com 205.251.193.19
ns-907.awsdns-49.net 205.251.195.139
Related

Subdomains

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