b-ok.cc
Free website and domain report on b-ok.cc
Last Updated: 27th November, 2022 Update Now
Overview
Snoop Summary for b-ok.cc
This is a free and comprehensive report about b-ok.cc. B-ok.cc is hosted in Switzerland on a server with an IP address of 81.17.17.254, where CHE is the local currency and the local language is French. B-ok.cc is expected to earn an estimated $17,601 USD per day from advertising revenue. The sale of b-ok.cc would possibly be worth $12,848,904 USD. This figure is based on the daily revenue potential of the website over a 24 month period. B-ok.cc receives an estimated 1,890,395 unique visitors every day - an unbelievable amount of traffic! This report was last updated 27th November, 2022.
About b-ok.cc
| Site Preview: |   |
| Title: | Electronic library. Download books free. Finding books |
| Description: | Electronic library. Download books free. Finding books | B–OK. Download books for free. Find books |
| Keywords and Tags: | b cc ok, b ok books, b ok cc, b ok cc pdf, b ok cc site, https b ok cc, z lib, z library, z library project, zlibrary |
| Related Terms: | bargain books, best fiction books, best programming books, books malayalamm, children s books, historical fiction books, kobo books, malayalam story books, non fiction books, www ebook777 com medical books |
| Fav Icon: | |
| Age: | Over 5 years old |
| Domain Created: | 10th August, 2018 |
| Domain Updated: | 23rd August, 2019 |
| Domain Expires: | 10th September, 2020 |
Review
Snoop Score
4/5 (Excellent!)
Valuation
$12,848,904 USD
Note: All valuation figures are estimates.
Popularity
Worldwide Sensation
Note: Popularity is estimated.
Rank, Reach and Authority
| Alexa Rank: | 1,413 |
| Alexa Reach: | |
| SEMrush Rank (US): | 255,593 |
| SEMrush Authority Score: | 63 |
| Moz Domain Authority: | 45 |
| Moz Page Authority: | 48 |
Organic vs Paid (Google Ads)
| Organic | Paid | |
|---|---|---|
| Keywords: | 66,563 | 0 |
| Traffic: | 5,472 | 0 |
| Cost: | $8,886 USD | $0 USD |
Traffic
Visitors
| Daily Visitors: | 1,890,395 |
| Monthly Visitors: | 57,537,676 |
| Yearly Visitors: | 689,994,256 |
Note: All visitors figures are estimates.
Visitors By Country
Revenue
Revenue
| Daily Revenue: | $17,601 USD |
| Monthly Revenue: | $535,726 USD |
| Yearly Revenue: | $6,424,447 USD |
Note: All revenue figures are estimates.
Revenue By Country
SEO
Backlinks Analysis (SEMrush)
| Backlinks: | 33,184,501 |
| Referring Domains: | 2,203 |
| Referring IPs: | 2,665 |
B-ok.cc has 33,184,501 backlinks according to SEMrush. 100% of these backlinks are "dofollow" (follow) links which allow the flow of link equity to pass through, which may improve b-ok.cc's search engine rankings. Other links are treated as 'hints' by search engines and may also pass link equity, depending on what search engines decide in each case.
100% of b-ok.cc's backlinks are text and image links, which are ideal for SEO. Other backlink types may be unrecognized or ignored by search engines.
Top New Follow Links
1
Source: https://z-lib.org/
Target: https://b-ok.cc/
2
Source: https://z-lib.org/
Target: https://b-ok.cc/
3
Source: https://z-lib.org/
Target: https://b-ok.cc/
4
Source: https://z-lib.org/
Target: https://b-ok.cc/
5
Source: https://z-lib.org/
Target: https://b-ok.cc/
Top Ranking Keywords (US)
1
Keyword: b ok cc
Ranked Page: https://b-ok.cc/categories
2
Keyword: z library
Ranked Page: https://wap.b-ok.cc/g/RD?p=4&page=3&order=bestmatch
3
Keyword: zlibrary
Ranked Page: https://wap.b-ok.cc/g/RD?p=4&page=3&order=bestmatch
4
Keyword: b ok cc
Ranked Page: https://b-ok.cc/s/
5
Keyword: b ok cc
Ranked Page: https://b-ok.cc/g/E.
Domain Analysis
| Value | Length | |
|---|---|---|
| Domain: | b-ok.cc | 7 |
| Domain Name: | b-ok | 4 |
| Extension (TLD): | cc | 2 |
| Expiry Check: | |
Page Speed Analysis
| Average Load Time: | |
| Load Time Comparison: |
PageSpeed Insights
Avg. (All Categories)
Performance
Accessibility
Best Practices
SEO
Progressive Web App
0–49 (Fail) 50–89 (Average) 90–100 (Pass) 
URL: https://b-ok.cc/
Updated: 2nd June, 2020
1.91 seconds
First Contentful Paint (FCP)
0.01 seconds
First Input Delay (FID) Simulate loading on desktop
Performance
Indicates how well the page is performing and highlights opportunities where performance may be improved for b-ok.cc. This includes details about optimizing page load times which can result in a better user experience.Metrics
First Contentful Paint — 0.6 s The time taken for the first image or text on the page to be rendered.
Time to Interactive — 0.7 s The time taken for the page to become fully interactive.
Total Blocking Time — 0 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).
Other
First CPU Idle — 0.7 s The time taken for the page's main thread to be quiet enough to handle input.
Max Potential First Input Delay — 40 ms Users could experience a delay when interacting with the page.
First Meaningful Paint — 0.7 s The time taken for the primary content of the page to be rendered.
Estimated Input Latency — 10 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 b-ok.cc as laggy when the latency is higher than 0.05 seconds.
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://b-ok.cc/ | 0 | 468.99200003827 | 250 | 0 | 301 | text/html | |
| https://b-ok.cc/ | 469.31000001496 | 926.85899999924 | 9841 | 39700 | 200 | text/html | Document |
| https://b-ok.cc/resources/build/global.css?0.191 | 945.30200003646 | 1423.7079999875 | 27304 | 157671 | 200 | text/css | Stylesheet |
| https://b-ok.cc/resources/build/global.js?0.191 | 945.59299998218 | 1953.8940000348 | 59441 | 193096 | 200 | application/javascript | Script |
| https://connect.facebook.net/en_GB/sdk.js | 1965.269999986 | 1979.8890000093 | 2659 | 3224 | 200 | application/x-javascript | Script |
| https://static.zlibcdn.com/covers300/books/75/c6/32/75c6327cbc43eeed270122436431de74.jpg | 1993.3099999907 | 2745.6550000352 | 22230 | 22015 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/c0/44/96/c04496dd5c065362357c36636a6ce91f.jpg | 1993.4120000107 | 2628.4590000287 | 3500 | 3289 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/96/f9/97/96f997237d1fffe83467f130c350f275.jpg | 1993.4910000302 | 2721.1419999949 | 28294 | 28079 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/36/92/c8/3692c8b9288c21d0247aaad0ca217ded.jpg | 1994.3170000333 | 2819.5399999968 | 22930 | 22714 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/9c/de/95/9cde954bfb23fd3969b30fb0a0441b09.jpg | 1994.8940000031 | 2732.2719999938 | 19009 | 18794 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/f8/8e/da/f88eda422a061bb715245c6c3e6dc4a0.jpg | 1995.0360000366 | 2814.6790000028 | 27286 | 27071 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/65/fa/60/65fa60176928697c4cca7ca91fedd02e.jpg | 1995.1730000321 | 2720.6960000331 | 28138 | 27922 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/92/62/88/92628898ed488f11aad59014618abe7b.jpg | 1995.2679999988 | 2839.3240000005 | 24927 | 24711 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/18/45/6c/18456cab8d6fa8b18cffdcd0cf14dfb3.jpg | 1995.4450000077 | 2807.872000034 | 19691 | 19476 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/f7/a0/e4/f7a0e40c3bf0d10622f23188435bbd0e.jpg | 1995.6230000244 | 2964.0540000401 | 45944 | 45728 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/e5/37/e1/e537e1c828e250b097134dc8014ed1a6.jpg | 1995.717999991 | 2849.0950000123 | 37147 | 36931 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/ab/02/77/ab0277c8cc5b33e51564114b062fd8d6.jpg | 1995.9760000347 | 2689.2140000127 | 10572 | 10359 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/81/73/f4/8173f45bf7d20f09d19376b83356bf8a.jpg | 1996.1510000285 | 2746.3829999906 | 21022 | 20807 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/65/a4/c3/65a4c3f886fe61989d0c6c168e89fce4.jpg | 1996.7100000358 | 2847.3010000307 | 20149 | 19934 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/e0/c9/0f/e0c90f5e3639d7322be560a7663b1251.jpg | 1996.9290000154 | 2849.5340000372 | 24965 | 24750 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/f9/56/4b/f9564b3a82da094ca51bddc04328b675.jpg | 1997.0500000054 | 2734.4930000254 | 24797 | 24581 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/d4/c1/05/d4c1051abc09fa5a46851f613fbe0894.jpg | 1997.1890000161 | 2829.1339999996 | 33143 | 32930 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/e7/dd/a4/e7dda489122e98d21c0f833d6fbb49d9.jpg | 1997.6979999919 | 2734.9040000117 | 25928 | 25712 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/bb/70/a5/bb70a5b75b5950cc07f21a1a9fb03de2.jpg | 1997.7950000321 | 2844.9580000015 | 17524 | 17309 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/70/32/d8/7032d82ffdc013053cb5ba5e04c8bc74.jpg | 1997.8809999884 | 2838.0630000029 | 23236 | 23020 | 200 | image/jpeg | Image |
| https://b-ok.cc/resources/ext/freewall.js | 1425.0970000285 | 1982.004999998 | 11107 | 45844 | 200 | application/javascript | Script |
| https://b-ok.cc/resources/fonts/stolzl-book-webfont.4.woff2 | 2004.6389999916 | 2236.7190000368 | 19567 | 19332 | 200 | font/woff2 | Font |
| https://b-ok.cc/resources/fonts/glyphicons-halflings-regular.woff2 | 2005.3390000248 | 2468.5189999873 | 18263 | 18028 | 200 | font/woff2 | Font |
| https://connect.facebook.net/en_GB/sdk.js?hash=27a9c4985a6e8bb5efb1f896381ca298&ua=modern_es6 | 2061.4640000276 | 2083.2120000268 | 61926 | 202837 | 200 | application/x-javascript | Script |
| https://counter.yadro.ru/hit;bookzz?r;s800*600*24;uhttps%3A//b-ok.cc/;0.7027291403758111 | 2069.513000024 | 2615.75300002 | 498 | 0 | 302 | text/html | |
| https://counter.yadro.ru/hit;bookzz?q;r;s800*600*24;uhttps%3A//b-ok.cc/;0.7027291403758111 | 2615.9029999981 | 3204.2840000358 | 421 | 43 | 200 | image/gif | Image |
| https://www.facebook.com/v4.0/plugins/like.php?action=recommend&app_id=334612670670810&channel=https%3A%2F%2Fstaticxx.facebook.com%2Fx%2Fconnect%2Fxd_arbiter%2F%3Fversion%3D46%23cb%3Df27c04a45f9e684%26domain%3Db-ok.cc%26origin%3Dhttps%253A%252F%252Fb-ok.cc%252Ff1488b0d38a4d34%26relation%3Dparent.parent&container_width=0&href=https%3A%2F%2Fz-lib.org%2F&layout=button_count&locale=en_GB&sdk=joey&share=false&show_faces=false&size=small | 3363.1090000272 | 3439.5559999975 | 17764 | 58710 | 200 | text/html | Document |
| https://static.xx.fbcdn.net/rsrc.php/v3/yr/r/zSKZHMh8mXU.png | 3452.6070000138 | 3467.1190000372 | 938 | 388 | 200 | image/png | Image |
| https://static.xx.fbcdn.net/rsrc.php/v3izfz4/yA/l/en_GB/3TuKvReewqn.js?_nc_x=Ij3Wp8lg5Kz | 3457.1400000132 | 3483.264999988 | 132135 | 521322 | 200 | application/x-javascript | XHR |
| https://www.facebook.com/common/cavalry_endpoint.php?t_cstart=1591115021989&t_start=1591115021989&t_domcontent=1591115022009&t_layout=1591115022022&t_onload=1591115022022&t_paint=1591115022022&t_creport=1591115022022&t_tti=1591115022009&lid=6833786980883446026-0 | 3487.6330000116 | 3514.0370000154 | 1304 | 67 | 200 | image/png | Image |
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) |
|---|---|
| 956.4 | 8.135 |
| 970.629 | 7.435 |
| 1452.362 | 11.55 |
| 1992.843 | 30.91 |
| 2023.767 | 28.418 |
| 2058.876 | 28.244 |
| 2095.951 | 76.397 |
| 2188.669 | 17.685 |
| 2269.004 | 9.229 |
| 2499.629 | 8.951 |
| 2657.04 | 41.807 |
| 2719.422 | 32.421 |
| 2757.428 | 29.505 |
| 2786.964 | 35.782 |
| 2830.687 | 40.292 |
| 2871.008 | 38.567 |
| 2909.604 | 30.824 |
| 2944.009 | 32.287 |
| 2976.331 | 38.858 |
| 3024.299 | 32.964 |
| 3057.291 | 29.212 |
| 3086.531 | 35.336 |
| 3121.908 | 32.951 |
| 3157.262 | 26.298 |
| 3183.584 | 26.177 |
| 3209.789 | 26.54 |
| 3236.36 | 38.054 |
| 3274.455 | 30.519 |
| 3305.002 | 30.553 |
| 3335.588 | 28.07 |
| 3366.281 | 24.715 |
| 3469.036 | 7.284 |
| 3479.644 | 8.45 |
| 3488.318 | 7.149 |
| 3495.479 | 5.691 |
Opportunities
Defer offscreen images Time to Interactive can be slowed down by resources on the page. B-ok.cc should consider lazy-loading offscreen and hidden images.
Minify CSS Cascading Style Sheets (CSS) files can contribute to network payload sizes. B-ok.cc should consider minifying CSS files.
Minify JavaScript — Potential savings of 6 KB JavaScript (JS) files can contribute to network payload sizes and increase script parse times. B-ok.cc should consider minifying JS files.
| URL | Transfer Size (Bytes) | Potential Savings (Bytes) |
|---|---|---|
| https://b-ok.cc/resources/ext/freewall.js | 11107 | 5932 |
Remove unused CSS — Potential savings of 25 KB Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. B-ok.cc 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://b-ok.cc/resources/build/global.css?0.191 | 27304 | 25608 |
Remove unused JavaScript — Potential savings of 82 KB It is advised to remove unused JavaScript in order to reduce bytes consumed by network activity.
| URL | Transfer Size (Bytes) | Potential Savings (Bytes) |
|---|---|---|
| https://b-ok.cc/resources/build/global.js?0.191 | 59441 | 43497 |
| https://connect.facebook.net/en_GB/sdk.js?hash=27a9c4985a6e8bb5efb1f896381ca298&ua=modern_es6 | 61926 | 36918 |
| https://b-ok.cc/resources/ext/freewall.js | 11107 | 3203 |
Efficiently encode images Unoptimized images can consume more cellular data than what is necessary.
Serve images in next-gen formats — Potential savings of 14 KB 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://static.zlibcdn.com/covers300/books/d4/c1/05/d4c1051abc09fa5a46851f613fbe0894.jpg | 32930 | 14698 |
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 460 ms It is advised to keep the server response time short for the main document, because all other requests depend on it.
Avoid multiple page redirects — Potential savings of 190 ms Redirects can cause additional delays before the page can begin loading. B-ok.cc should avoid multiple or unnecessary page redirects.
| URL | Time Spent (Ms) |
|---|---|
| (Start) http://b-ok.cc/ | 0 |
| https://b-ok.cc/ | 190 |
Preload key requests Key requests can be preloaded by using '<link rel=preload>'. B-ok.cc should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
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.
Diagnostics
Avoids enormous network payloads — Total size was 824 KB Large network payloads can cost users money and are linked to long load times.
| URL | Transfer Size (Bytes) |
|---|---|
| https://static.xx.fbcdn.net/rsrc.php/v3izfz4/yA/l/en_GB/3TuKvReewqn.js?_nc_x=Ij3Wp8lg5Kz | 132135 |
| https://connect.facebook.net/en_GB/sdk.js?hash=27a9c4985a6e8bb5efb1f896381ca298&ua=modern_es6 | 61926 |
| https://b-ok.cc/resources/build/global.js?0.191 | 59441 |
| https://static.zlibcdn.com/covers300/books/f7/a0/e4/f7a0e40c3bf0d10622f23188435bbd0e.jpg | 45944 |
| https://static.zlibcdn.com/covers300/books/e5/37/e1/e537e1c828e250b097134dc8014ed1a6.jpg | 37147 |
| https://static.zlibcdn.com/covers300/books/d4/c1/05/d4c1051abc09fa5a46851f613fbe0894.jpg | 33143 |
| https://static.zlibcdn.com/covers300/books/96/f9/97/96f997237d1fffe83467f130c350f275.jpg | 28294 |
| https://static.zlibcdn.com/covers300/books/65/fa/60/65fa60176928697c4cca7ca91fedd02e.jpg | 28138 |
| https://b-ok.cc/resources/build/global.css?0.191 | 27304 |
| https://static.zlibcdn.com/covers300/books/f8/8e/da/f88eda422a061bb715245c6c3e6dc4a0.jpg | 27286 |
Avoids an excessive DOM size — 534 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 | 534 | |
| Maximum DOM Depth | 16 | |
| Maximum Child Elements | 102 |
Avoid chaining critical requests — 5 chains found Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. B-ok.cc 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.
JavaScript execution time — 0.6 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://b-ok.cc/resources/build/global.js?0.191 | 751.786 | 571.391 | 3.074 |
| https://b-ok.cc/ | 151.644 | 16.094 | 2.823 |
Minimizes main-thread work — 1.0 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 | 634.13 |
| Style & Layout | 237.072 |
| Other | 77.435 |
| Parse HTML & CSS | 39.306 |
| Rendering | 31.188 |
| Script Parsing & Compilation | 19.03 |
| Garbage Collection | 6.658 |
Keep request counts low and transfer sizes small — 35 requests • 824 KB 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 | 35 | 843850 |
| Image | 23 | 483095 |
| Script | 4 | 135133 |
| Other | 3 | 132883 |
| Font | 2 | 37830 |
| Document | 2 | 27605 |
| Stylesheet | 1 | 27304 |
| Media | 0 | 0 |
| Third-party | 28 | 698077 |
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) |
|---|---|---|
| 216726 | 0 |
Largest Contentful Paint element — 1 element found The element which was identified as the Largest Contentful Paint.
| Element |
|---|
Avoid large layout shifts — No elements found Below is a list of all DOM elements that contribute to the CLS of the page.
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.
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.
Metrics
Speed Index — 2.1 s The time taken for the page contents to be visibly populated.
Largest Contentful Paint — 1.6 s The timing of the largest text or image that is painted.
Opportunities
Eliminate render-blocking resources — Potential savings of 230 ms Resources, such as JavaScript and style sheets, can block the first paint of the page. B-ok.cc 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://b-ok.cc/resources/build/global.css?0.191 | 27304 | 110 |
| https://b-ok.cc/resources/build/global.js?0.191 | 59441 | 110 |
Properly size images — Potential savings of 281 KB Images can slow down the page's load time. B-ok.cc should consider serving more appropriate-sized images.
| URL | Resource Size (Bytes) | Potential Savings (Bytes) |
|---|---|---|
| https://static.zlibcdn.com/covers300/books/f7/a0/e4/f7a0e40c3bf0d10622f23188435bbd0e.jpg | 45728 | 28204 |
| https://static.zlibcdn.com/covers300/books/e5/37/e1/e537e1c828e250b097134dc8014ed1a6.jpg | 36931 | 22796 |
| https://static.zlibcdn.com/covers300/books/d4/c1/05/d4c1051abc09fa5a46851f613fbe0894.jpg | 32930 | 17878 |
| https://static.zlibcdn.com/covers300/books/96/f9/97/96f997237d1fffe83467f130c350f275.jpg | 28079 | 17297 |
| https://static.zlibcdn.com/covers300/books/65/fa/60/65fa60176928697c4cca7ca91fedd02e.jpg | 27922 | 17213 |
| https://static.zlibcdn.com/covers300/books/f8/8e/da/f88eda422a061bb715245c6c3e6dc4a0.jpg | 27071 | 16679 |
| https://static.zlibcdn.com/covers300/books/e7/dd/a4/e7dda489122e98d21c0f833d6fbb49d9.jpg | 25712 | 15847 |
| https://static.zlibcdn.com/covers300/books/e0/c9/0f/e0c90f5e3639d7322be560a7663b1251.jpg | 24750 | 15270 |
| https://static.zlibcdn.com/covers300/books/92/62/88/92628898ed488f11aad59014618abe7b.jpg | 24711 | 15234 |
| https://static.zlibcdn.com/covers300/books/f9/56/4b/f9564b3a82da094ca51bddc04328b675.jpg | 24581 | 15143 |
| https://static.zlibcdn.com/covers300/books/70/32/d8/7032d82ffdc013053cb5ba5e04c8bc74.jpg | 23020 | 14177 |
| https://static.zlibcdn.com/covers300/books/36/92/c8/3692c8b9288c21d0247aaad0ca217ded.jpg | 22714 | 14006 |
| https://static.zlibcdn.com/covers300/books/75/c6/32/75c6327cbc43eeed270122436431de74.jpg | 22015 | 13583 |
| https://static.zlibcdn.com/covers300/books/81/73/f4/8173f45bf7d20f09d19376b83356bf8a.jpg | 20807 | 12839 |
| https://static.zlibcdn.com/covers300/books/65/a4/c3/65a4c3f886fe61989d0c6c168e89fce4.jpg | 19934 | 12296 |
| https://static.zlibcdn.com/covers300/books/18/45/6c/18456cab8d6fa8b18cffdcd0cf14dfb3.jpg | 19476 | 11998 |
| https://static.zlibcdn.com/covers300/books/9c/de/95/9cde954bfb23fd3969b30fb0a0441b09.jpg | 18794 | 11575 |
| https://static.zlibcdn.com/covers300/books/bb/70/a5/bb70a5b75b5950cc07f21a1a9fb03de2.jpg | 17309 | 10677 |
| https://static.zlibcdn.com/covers300/books/ab/02/77/ab0277c8cc5b33e51564114b062fd8d6.jpg | 10359 | 5453 |
Metrics
Cumulative Layout Shift — 1.541 Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data
Diagnostics
Serve static assets with an efficient cache policy — 26 resources found B-ok.cc 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://b-ok.cc/resources/build/global.js?0.191 | 0 | 59441 |
| https://static.zlibcdn.com/covers300/books/f7/a0/e4/f7a0e40c3bf0d10622f23188435bbd0e.jpg | 0 | 45944 |
| https://static.zlibcdn.com/covers300/books/e5/37/e1/e537e1c828e250b097134dc8014ed1a6.jpg | 0 | 37147 |
| https://static.zlibcdn.com/covers300/books/d4/c1/05/d4c1051abc09fa5a46851f613fbe0894.jpg | 0 | 33143 |
| https://static.zlibcdn.com/covers300/books/96/f9/97/96f997237d1fffe83467f130c350f275.jpg | 0 | 28294 |
| https://static.zlibcdn.com/covers300/books/65/fa/60/65fa60176928697c4cca7ca91fedd02e.jpg | 0 | 28138 |
| https://b-ok.cc/resources/build/global.css?0.191 | 0 | 27304 |
| https://static.zlibcdn.com/covers300/books/f8/8e/da/f88eda422a061bb715245c6c3e6dc4a0.jpg | 0 | 27286 |
| https://static.zlibcdn.com/covers300/books/e7/dd/a4/e7dda489122e98d21c0f833d6fbb49d9.jpg | 0 | 25928 |
| https://static.zlibcdn.com/covers300/books/e0/c9/0f/e0c90f5e3639d7322be560a7663b1251.jpg | 0 | 24965 |
| https://static.zlibcdn.com/covers300/books/92/62/88/92628898ed488f11aad59014618abe7b.jpg | 0 | 24927 |
| https://static.zlibcdn.com/covers300/books/f9/56/4b/f9564b3a82da094ca51bddc04328b675.jpg | 0 | 24797 |
| https://static.zlibcdn.com/covers300/books/70/32/d8/7032d82ffdc013053cb5ba5e04c8bc74.jpg | 0 | 23236 |
| https://static.zlibcdn.com/covers300/books/36/92/c8/3692c8b9288c21d0247aaad0ca217ded.jpg | 0 | 22930 |
| https://static.zlibcdn.com/covers300/books/75/c6/32/75c6327cbc43eeed270122436431de74.jpg | 0 | 22230 |
| https://static.zlibcdn.com/covers300/books/81/73/f4/8173f45bf7d20f09d19376b83356bf8a.jpg | 0 | 21022 |
| https://static.zlibcdn.com/covers300/books/65/a4/c3/65a4c3f886fe61989d0c6c168e89fce4.jpg | 0 | 20149 |
| https://static.zlibcdn.com/covers300/books/18/45/6c/18456cab8d6fa8b18cffdcd0cf14dfb3.jpg | 0 | 19691 |
| https://b-ok.cc/resources/fonts/stolzl-book-webfont.4.woff2 | 0 | 19567 |
| https://static.zlibcdn.com/covers300/books/9c/de/95/9cde954bfb23fd3969b30fb0a0441b09.jpg | 0 | 19009 |
| https://b-ok.cc/resources/fonts/glyphicons-halflings-regular.woff2 | 0 | 18263 |
| https://static.zlibcdn.com/covers300/books/bb/70/a5/bb70a5b75b5950cc07f21a1a9fb03de2.jpg | 0 | 17524 |
| https://b-ok.cc/resources/ext/freewall.js | 0 | 11107 |
| https://static.zlibcdn.com/covers300/books/ab/02/77/ab0277c8cc5b33e51564114b062fd8d6.jpg | 0 | 10572 |
| https://static.zlibcdn.com/covers300/books/c0/44/96/c04496dd5c065362357c36636a6ce91f.jpg | 0 | 3500 |
| https://connect.facebook.net/en_GB/sdk.js | 1200000 | 2659 |
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://b-ok.cc/resources/fonts/stolzl-book-webfont.4.woff2 | 232.08000004524 |
| https://b-ok.cc/resources/fonts/glyphicons-halflings-regular.woff2 | 463.17999996245 |
Accessibility
Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of b-ok.cc. 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.
`<input type="image">` elements have `[alt]` text Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
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 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.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5. For users with low vision who rely on screen magnification, ensure that zooming is not disabled.
Audio and video
`<video>` elements contain a `<track>` element with `[kind="captions"]` B-ok.cc may provide assistance to deaf or hearing-impaired users with captions on videos.
`<video>` elements contain a `<track>` element with `[kind="description"]` B-ok.cc 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 |
|---|
Image elements do not have `[alt]` attributes Provide short and descriptive alternative text where possible on informative elements.
| Failing Elements |
|---|
Form elements do not have associated labels Screen readers and other assistive technologies rely on labels to properly announce form controls.
| Failing Elements |
|---|
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 |
|---|
Internationalization and localization
`<html>` element does not have 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.
| Failing Elements |
|---|
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.
Best Practices
Indicates the recommended, best practices currently in place on the page and highlights the best practices that b-ok.cc 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.
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.
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 |
|---|---|
| Bootstrap | 3.3.7 |
| jQuery | 2.2.4 |
| Underscore | 1.4.4 |
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://b-ok.cc/ |
Includes front-end JavaScript libraries with known security vulnerabilities — 9 vulnerabilities detected 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.
| Library Version | Vulnerability Count | Highest Severity |
|---|---|---|
| 5 | Medium | |
| 4 | Medium |
Audits
Displays images with inappropriate size For maximum image clarity, ensure images have natural dimensions and are proportional to the display size and pixel ratio.
| URL | Displayed size | Actual size | Expected size |
|---|---|---|---|
| https://static.zlibcdn.com/covers300/books/c0/44/96/c04496dd5c065362357c36636a6ce91f.jpg | 186 x 281 | 76 x 115 | 186 x 281 |
SEO
Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for b-ok.cc. 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 b-ok.cc 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.
Links have descriptive text Make use of descriptive link text to assist search engines in understanding the content.
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.
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.
robots.txt is valid Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.
Content Best Practices
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.
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 b-ok.cc. This includes details about web app manifests.Fast and reliable
Page load is fast enough on mobile networks Ensure that the page loads fast enough over a cellular network, to ensure good mobile user experience.
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.
Configured for a custom splash screen Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Sets 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
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 b-ok.cc on mobile screens.
Contains some content when JavaScript is not available Apps should display alternative content for when JavaScript is disabled.
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
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://b-ok.cc/ |
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
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)
Performance
Accessibility
Best Practices
SEO
Progressive Web App
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
URL: https://b-ok.cc/
Updated: 2nd June, 2020
2.24 seconds
First Contentful Paint (FCP)
0.03 seconds
First Input Delay (FID) Simulate loading on mobile
Performance
Indicates how well the page is performing and highlights opportunities where performance may be improved for b-ok.cc. This includes details about optimizing page load times which can result in a better user experience.Metrics
First Contentful Paint — 1.9 s The time taken for the first image or text on the page to be rendered.
Cumulative Layout Shift — 0.057 Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data
Opportunities
Defer offscreen images Time to Interactive can be slowed down by resources on the page. B-ok.cc should consider lazy-loading offscreen and hidden images.
Minify CSS Cascading Style Sheets (CSS) files can contribute to network payload sizes. B-ok.cc should consider minifying CSS files.
Minify JavaScript — Potential savings of 6 KB JavaScript (JS) files can contribute to network payload sizes and increase script parse times. B-ok.cc should consider minifying JS files.
| URL | Transfer Size (Bytes) | Potential Savings (Bytes) |
|---|---|---|
| https://b-ok.cc/resources/ext/freewall.js | 11100 | 5929 |
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 140 ms It is advised to keep the server response time short for the main document, because all other requests depend on it.
Avoid multiple page redirects — Potential savings of 630 ms Redirects can cause additional delays before the page can begin loading. B-ok.cc should avoid multiple or unnecessary page redirects.
| URL | Time Spent (Ms) |
|---|---|
| (Start) http://b-ok.cc/ | 0 |
| https://b-ok.cc/ | 630 |
Preload key requests Key requests can be preloaded by using '<link rel=preload>'. B-ok.cc should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
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.
Diagnostics
Avoids enormous network payloads — Total size was 824 KB Large network payloads can cost users money and are linked to long load times.
| URL | Transfer Size (Bytes) |
|---|---|
| https://static.xx.fbcdn.net/rsrc.php/v3izfz4/yA/l/en_GB/3TuKvReewqn.js?_nc_x=Ij3Wp8lg5Kz | 132135 |
| https://connect.facebook.net/en_GB/sdk.js?hash=c848858a47bd422375b05a25646bb392&ua=modern_es6 | 61926 |
| https://b-ok.cc/resources/build/global.js?0.191 | 59441 |
| https://static.zlibcdn.com/covers300/books/f7/a0/e4/f7a0e40c3bf0d10622f23188435bbd0e.jpg | 45944 |
| https://static.zlibcdn.com/covers300/books/e5/37/e1/e537e1c828e250b097134dc8014ed1a6.jpg | 37147 |
| https://static.zlibcdn.com/covers300/books/d4/c1/05/d4c1051abc09fa5a46851f613fbe0894.jpg | 33143 |
| https://static.zlibcdn.com/covers300/books/96/f9/97/96f997237d1fffe83467f130c350f275.jpg | 28294 |
| https://static.zlibcdn.com/covers300/books/65/fa/60/65fa60176928697c4cca7ca91fedd02e.jpg | 28138 |
| https://b-ok.cc/resources/build/global.css?0.191 | 27304 |
| https://static.zlibcdn.com/covers300/books/f8/8e/da/f88eda422a061bb715245c6c3e6dc4a0.jpg | 27286 |
Avoids an excessive DOM size — 534 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 | 534 | |
| Maximum DOM Depth | 16 | |
| Maximum Child Elements | 102 |
Avoid chaining critical requests — 5 chains found Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. B-ok.cc 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 — 35 requests • 824 KB 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 | 35 | 843848 |
| Image | 23 | 483090 |
| Script | 5 | 267264 |
| Font | 2 | 37830 |
| Document | 2 | 27648 |
| Stylesheet | 1 | 27304 |
| Other | 2 | 712 |
| Media | 0 | 0 |
| Third-party | 28 | 698094 |
Minimize third-party usage — Third-party code blocked the main thread for 120 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) |
|---|---|---|
| 216767 | 116.372 |
Largest Contentful Paint element — 1 element found The element which was identified as the Largest Contentful Paint.
| Element |
|---|
Avoid large layout shifts — No elements found Below is a list of all DOM elements that contribute to the CLS of the page.
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.
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://b-ok.cc/ | 0 | 113.6590000242 | 238 | 0 | 301 | text/html | |
| https://b-ok.cc/ | 114.02100004489 | 251.83100003051 | 9841 | 39700 | 200 | text/html | Document |
| https://b-ok.cc/resources/build/global.css?0.191 | 280.72000003885 | 528.23200001149 | 27304 | 157671 | 200 | text/css | Stylesheet |
| https://b-ok.cc/resources/build/global.js?0.191 | 280.90499999234 | 908.20599999279 | 59441 | 193096 | 200 | application/javascript | Script |
| https://connect.facebook.net/en_GB/sdk.js | 920.97700003069 | 939.98000002466 | 2662 | 3224 | 200 | application/x-javascript | Script |
| https://static.zlibcdn.com/covers300/books/75/c6/32/75c6327cbc43eeed270122436431de74.jpg | 949.87499999115 | 1235.4740000446 | 22230 | 22015 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/c0/44/96/c04496dd5c065362357c36636a6ce91f.jpg | 950.19300002605 | 1106.0639999923 | 3500 | 3289 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/96/f9/97/96f997237d1fffe83467f130c350f275.jpg | 950.59600000968 | 1238.8040000224 | 28294 | 28079 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/36/92/c8/3692c8b9288c21d0247aaad0ca217ded.jpg | 950.75399999041 | 1238.3569999947 | 22930 | 22714 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/9c/de/95/9cde954bfb23fd3969b30fb0a0441b09.jpg | 951.46800001385 | 1240.3270000359 | 19009 | 18794 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/f8/8e/da/f88eda422a061bb715245c6c3e6dc4a0.jpg | 951.67600002605 | 1243.2990000234 | 27286 | 27071 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/65/fa/60/65fa60176928697c4cca7ca91fedd02e.jpg | 951.91000000341 | 1240.0270000217 | 28138 | 27922 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/92/62/88/92628898ed488f11aad59014618abe7b.jpg | 952.2280000383 | 1240.7879999955 | 24927 | 24711 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/18/45/6c/18456cab8d6fa8b18cffdcd0cf14dfb3.jpg | 952.46100000804 | 1239.5649999962 | 19691 | 19476 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/f7/a0/e4/f7a0e40c3bf0d10622f23188435bbd0e.jpg | 952.70100003108 | 1676.1420000112 | 45944 | 45728 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/e5/37/e1/e537e1c828e250b097134dc8014ed1a6.jpg | 953.00899998983 | 1242.2740000184 | 37147 | 36931 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/ab/02/77/ab0277c8cc5b33e51564114b062fd8d6.jpg | 953.40300002135 | 1112.0230000233 | 10572 | 10359 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/81/73/f4/8173f45bf7d20f09d19376b83356bf8a.jpg | 953.50599999074 | 1241.7630000273 | 21022 | 20807 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/65/a4/c3/65a4c3f886fe61989d0c6c168e89fce4.jpg | 953.6580000422 | 1555.0930000027 | 20149 | 19934 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/e0/c9/0f/e0c90f5e3639d7322be560a7663b1251.jpg | 953.77900003223 | 1242.6449999912 | 24965 | 24750 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/f9/56/4b/f9564b3a82da094ca51bddc04328b675.jpg | 953.89100001194 | 1553.7890000269 | 24797 | 24581 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/d4/c1/05/d4c1051abc09fa5a46851f613fbe0894.jpg | 954.00500000687 | 1562.3260000139 | 33143 | 32930 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/e7/dd/a4/e7dda489122e98d21c0f833d6fbb49d9.jpg | 954.11900000181 | 1243.7560000108 | 25928 | 25712 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/bb/70/a5/bb70a5b75b5950cc07f21a1a9fb03de2.jpg | 954.24300001469 | 1556.9230000256 | 17524 | 17309 | 200 | image/jpeg | Image |
| https://static.zlibcdn.com/covers300/books/70/32/d8/7032d82ffdc013053cb5ba5e04c8bc74.jpg | 955.09000000311 | 1557.3260000092 | 23236 | 23020 | 200 | image/jpeg | Image |
| https://b-ok.cc/resources/ext/freewall.js | 534.98300001957 | 1097.768000036 | 11100 | 45844 | 200 | application/javascript | Script |
| https://b-ok.cc/resources/fonts/stolzl-book-webfont.4.woff2 | 962.67999999691 | 1195.6580000115 | 19567 | 19332 | 200 | font/woff2 | Font |
| https://b-ok.cc/resources/fonts/glyphicons-halflings-regular.woff2 | 977.05600003246 | 1214.9210000061 | 18263 | 18028 | 200 | font/woff2 | Font |
| https://connect.facebook.net/en_GB/sdk.js?hash=c848858a47bd422375b05a25646bb392&ua=modern_es6 | 1004.8379999935 | 1025.0070000184 | 61926 | 202837 | 200 | application/x-javascript | Script |
| https://counter.yadro.ru/hit;bookzz?r;s360*640*24;uhttps%3A//b-ok.cc/;0.5635519910940394 | 1104.8569999984 | 1340.9230000107 | 474 | 0 | 302 | text/html | |
| https://www.facebook.com/v4.0/plugins/like.php?action=recommend&app_id=334612670670810&channel=https%3A%2F%2Fstaticxx.facebook.com%2Fx%2Fconnect%2Fxd_arbiter%2F%3Fversion%3D46%23cb%3Df1b18c516270d1%26domain%3Db-ok.cc%26origin%3Dhttps%253A%252F%252Fb-ok.cc%252Ff341a77cdae604c%26relation%3Dparent.parent&container_width=0&href=https%3A%2F%2Fz-lib.org%2F&layout=button_count&locale=en_GB&sdk=joey&share=false&show_faces=false&size=small | 1233.7600000319 | 1317.7680000081 | 17807 | 58747 | 200 | text/html | Document |
| https://counter.yadro.ru/hit;bookzz?q;r;s360*640*24;uhttps%3A//b-ok.cc/;0.5635519910940394 | 1341.1980000092 | 1478.2560000313 | 421 | 43 | 200 | image/gif | Image |
| https://static.xx.fbcdn.net/rsrc.php/v3/yr/r/zSKZHMh8mXU.png | 2013.8850000221 | 2031.3460000325 | 938 | 388 | 200 | image/png | Image |
| https://static.xx.fbcdn.net/rsrc.php/v3izfz4/yA/l/en_GB/3TuKvReewqn.js?_nc_x=Ij3Wp8lg5Kz | 2017.9920000373 | 2049.1740000434 | 132135 | 521322 | 200 | application/x-javascript | Script |
| https://www.facebook.com/common/cavalry_endpoint.php?t_cstart=1591115034122&t_start=1591115034122&t_domcontent=1591115034141&t_layout=1591115034239&t_onload=1591115034239&t_paint=1591115034239&t_creport=1591115034239&t_tti=1591115034141&lid=6833787032102213108-0 | 2133.4030000144 | 2158.9890000178 | 1299 | 67 | 200 | image/png | Image |
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) |
|---|---|
| 319.948 | 16.045 |
| 596.401 | 9.662 |
| 983.342 | 32.651 |
| 1017.203 | 15.236 |
| 1036.467 | 17.28 |
| 1053.81 | 10.079 |
| 1066.33 | 5.588 |
| 1103.103 | 22.119 |
| 1166.107 | 131.818 |
| 1297.955 | 5.063 |
| 1315.699 | 41.114 |
| 1356.831 | 5.285 |
| 1362.159 | 37.916 |
| 1403.736 | 36.023 |
| 1439.792 | 35.773 |
| 1475.599 | 35.101 |
| 1510.754 | 37.301 |
| 1548.157 | 33.31 |
| 1581.507 | 44.357 |
| 1629.705 | 34.625 |
| 1664.652 | 7.998 |
| 1672.858 | 33.649 |
| 1706.541 | 37.807 |
| 1744.39 | 32.287 |
| 1779.308 | 37.446 |
| 1816.788 | 33.798 |
| 1859.311 | 35.1 |
| 1894.446 | 35.866 |
| 1930.37 | 40.79 |
| 1974.63 | 30.018 |
| 2004.678 | 33.542 |
| 2039.877 | 33.448 |
| 2075.747 | 6.731 |
| 2082.876 | 13.313 |
| 2142.704 | 48.988 |
Metrics
Total Blocking Time — 460 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).
Other
First CPU Idle — 5.5 s The time taken for the page's main thread to be quiet enough to handle input.
First Meaningful Paint — 3.0 s The time taken for the primary content of the page to be rendered.
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 b-ok.cc as laggy when the latency is higher than 0.05 seconds.
First Contentful Paint (3G) — 3851 ms The time taken for the first image or text on the page to be rendered while on a 3G network.
Opportunities
Eliminate render-blocking resources — Potential savings of 750 ms Resources, such as JavaScript and style sheets, can block the first paint of the page. B-ok.cc 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://b-ok.cc/resources/build/global.css?0.191 | 27304 | 330 |
| https://b-ok.cc/resources/build/global.js?0.191 | 59441 | 330 |
Remove unused CSS — Potential savings of 25 KB Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. B-ok.cc 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://b-ok.cc/resources/build/global.css?0.191 | 27304 | 25638 |
Serve images in next-gen formats — Potential savings of 14 KB 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://static.zlibcdn.com/covers300/books/d4/c1/05/d4c1051abc09fa5a46851f613fbe0894.jpg | 32930 | 14698 |
Diagnostics
Reduce JavaScript execution time — 2.9 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://b-ok.cc/resources/build/global.js?0.191 | 3320.68 | 2336.572 | 13.004 |
| https://b-ok.cc/ | 483.244 | 49.936 | 20.78 |
| https://connect.facebook.net/en_GB/sdk.js?hash=c848858a47bd422375b05a25646bb392&ua=modern_es6 | 277.7 | 219.856 | 33.716 |
| https://www.facebook.com/v4.0/plugins/like.php?action=recommend&app_id=334612670670810&channel=https%3A%2F%2Fstaticxx.facebook.com%2Fx%2Fconnect%2Fxd_arbiter%2F%3Fversion%3D46%23cb%3Df1b18c516270d1%26domain%3Db-ok.cc%26origin%3Dhttps%253A%252F%252Fb-ok.cc%252Ff341a77cdae604c%26relation%3Dparent.parent&container_width=0&href=https%3A%2F%2Fz-lib.org%2F&layout=button_count&locale=en_GB&sdk=joey&share=false&show_faces=false&size=small | 201.968 | 107.972 | 19.504 |
| Unattributable | 172.468 | 4.168 | 0.516 |
| https://static.xx.fbcdn.net/rsrc.php/v3izfz4/yA/l/en_GB/3TuKvReewqn.js?_nc_x=Ij3Wp8lg5Kz | 127.092 | 52.244 | 61.308 |
Metrics
Speed Index — 6.3 s The time taken for the page contents to be visibly populated.
Largest Contentful Paint — 5.7 s The timing of the largest text or image that is painted.
Time to Interactive — 7.4 s The time taken for the page to become fully interactive.
Other
Max Potential First Input Delay — 260 ms Users could experience a delay when interacting with the page.
Opportunities
Properly size images — Potential savings of 342 KB Images can slow down the page's load time. B-ok.cc should consider serving more appropriate-sized images.
| URL | Resource Size (Bytes) | Potential Savings (Bytes) |
|---|---|---|
| https://static.zlibcdn.com/covers300/books/f7/a0/e4/f7a0e40c3bf0d10622f23188435bbd0e.jpg | 45728 | 34028 |
| https://static.zlibcdn.com/covers300/books/e5/37/e1/e537e1c828e250b097134dc8014ed1a6.jpg | 36931 | 27449 |
| https://static.zlibcdn.com/covers300/books/d4/c1/05/d4c1051abc09fa5a46851f613fbe0894.jpg | 32930 | 22956 |
| https://static.zlibcdn.com/covers300/books/96/f9/97/96f997237d1fffe83467f130c350f275.jpg | 28079 | 20919 |
| https://static.zlibcdn.com/covers300/books/65/fa/60/65fa60176928697c4cca7ca91fedd02e.jpg | 27922 | 20742 |
| https://static.zlibcdn.com/covers300/books/f8/8e/da/f88eda422a061bb715245c6c3e6dc4a0.jpg | 27071 | 20162 |
| https://static.zlibcdn.com/covers300/books/e7/dd/a4/e7dda489122e98d21c0f833d6fbb49d9.jpg | 25712 | 19094 |
| https://static.zlibcdn.com/covers300/books/e0/c9/0f/e0c90f5e3639d7322be560a7663b1251.jpg | 24750 | 18449 |
| https://static.zlibcdn.com/covers300/books/92/62/88/92628898ed488f11aad59014618abe7b.jpg | 24711 | 18433 |
| https://static.zlibcdn.com/covers300/books/f9/56/4b/f9564b3a82da094ca51bddc04328b675.jpg | 24581 | 18264 |
| https://static.zlibcdn.com/covers300/books/70/32/d8/7032d82ffdc013053cb5ba5e04c8bc74.jpg | 23020 | 17153 |
| https://static.zlibcdn.com/covers300/books/36/92/c8/3692c8b9288c21d0247aaad0ca217ded.jpg | 22714 | 16939 |
| https://static.zlibcdn.com/covers300/books/75/c6/32/75c6327cbc43eeed270122436431de74.jpg | 22015 | 16410 |
| https://static.zlibcdn.com/covers300/books/81/73/f4/8173f45bf7d20f09d19376b83356bf8a.jpg | 20807 | 15476 |
| https://static.zlibcdn.com/covers300/books/65/a4/c3/65a4c3f886fe61989d0c6c168e89fce4.jpg | 19934 | 14862 |
| https://static.zlibcdn.com/covers300/books/18/45/6c/18456cab8d6fa8b18cffdcd0cf14dfb3.jpg | 19476 | 14471 |
| https://static.zlibcdn.com/covers300/books/9c/de/95/9cde954bfb23fd3969b30fb0a0441b09.jpg | 18794 | 13970 |
| https://static.zlibcdn.com/covers300/books/bb/70/a5/bb70a5b75b5950cc07f21a1a9fb03de2.jpg | 17309 | 12880 |
| https://static.zlibcdn.com/covers300/books/ab/02/77/ab0277c8cc5b33e51564114b062fd8d6.jpg | 10359 | 7101 |
Remove unused JavaScript — Potential savings of 184 KB It is advised to remove unused JavaScript in order to reduce bytes consumed by network activity.
| URL | Transfer Size (Bytes) | Potential Savings (Bytes) |
|---|---|---|
| https://static.xx.fbcdn.net/rsrc.php/v3izfz4/yA/l/en_GB/3TuKvReewqn.js?_nc_x=Ij3Wp8lg5Kz | 132135 | 104723 |
| https://b-ok.cc/resources/build/global.js?0.191 | 59441 | 43497 |
| https://connect.facebook.net/en_GB/sdk.js?hash=c848858a47bd422375b05a25646bb392&ua=modern_es6 | 61926 | 36778 |
| https://b-ok.cc/resources/ext/freewall.js | 11100 | 3201 |
Diagnostics
Serve static assets with an efficient cache policy — 26 resources found B-ok.cc 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://b-ok.cc/resources/build/global.js?0.191 | 0 | 59441 |
| https://static.zlibcdn.com/covers300/books/f7/a0/e4/f7a0e40c3bf0d10622f23188435bbd0e.jpg | 0 | 45944 |
| https://static.zlibcdn.com/covers300/books/e5/37/e1/e537e1c828e250b097134dc8014ed1a6.jpg | 0 | 37147 |
| https://static.zlibcdn.com/covers300/books/d4/c1/05/d4c1051abc09fa5a46851f613fbe0894.jpg | 0 | 33143 |
| https://static.zlibcdn.com/covers300/books/96/f9/97/96f997237d1fffe83467f130c350f275.jpg | 0 | 28294 |
| https://static.zlibcdn.com/covers300/books/65/fa/60/65fa60176928697c4cca7ca91fedd02e.jpg | 0 | 28138 |
| https://b-ok.cc/resources/build/global.css?0.191 | 0 | 27304 |
| https://static.zlibcdn.com/covers300/books/f8/8e/da/f88eda422a061bb715245c6c3e6dc4a0.jpg | 0 | 27286 |
| https://static.zlibcdn.com/covers300/books/e7/dd/a4/e7dda489122e98d21c0f833d6fbb49d9.jpg | 0 | 25928 |
| https://static.zlibcdn.com/covers300/books/e0/c9/0f/e0c90f5e3639d7322be560a7663b1251.jpg | 0 | 24965 |
| https://static.zlibcdn.com/covers300/books/92/62/88/92628898ed488f11aad59014618abe7b.jpg | 0 | 24927 |
| https://static.zlibcdn.com/covers300/books/f9/56/4b/f9564b3a82da094ca51bddc04328b675.jpg | 0 | 24797 |
| https://static.zlibcdn.com/covers300/books/70/32/d8/7032d82ffdc013053cb5ba5e04c8bc74.jpg | 0 | 23236 |
| https://static.zlibcdn.com/covers300/books/36/92/c8/3692c8b9288c21d0247aaad0ca217ded.jpg | 0 | 22930 |
| https://static.zlibcdn.com/covers300/books/75/c6/32/75c6327cbc43eeed270122436431de74.jpg | 0 | 22230 |
| https://static.zlibcdn.com/covers300/books/81/73/f4/8173f45bf7d20f09d19376b83356bf8a.jpg | 0 | 21022 |
| https://static.zlibcdn.com/covers300/books/65/a4/c3/65a4c3f886fe61989d0c6c168e89fce4.jpg | 0 | 20149 |
| https://static.zlibcdn.com/covers300/books/18/45/6c/18456cab8d6fa8b18cffdcd0cf14dfb3.jpg | 0 | 19691 |
| https://b-ok.cc/resources/fonts/stolzl-book-webfont.4.woff2 | 0 | 19567 |
| https://static.zlibcdn.com/covers300/books/9c/de/95/9cde954bfb23fd3969b30fb0a0441b09.jpg | 0 | 19009 |
| https://b-ok.cc/resources/fonts/glyphicons-halflings-regular.woff2 | 0 | 18263 |
| https://static.zlibcdn.com/covers300/books/bb/70/a5/bb70a5b75b5950cc07f21a1a9fb03de2.jpg | 0 | 17524 |
| https://b-ok.cc/resources/ext/freewall.js | 0 | 11100 |
| https://static.zlibcdn.com/covers300/books/ab/02/77/ab0277c8cc5b33e51564114b062fd8d6.jpg | 0 | 10572 |
| https://static.zlibcdn.com/covers300/books/c0/44/96/c04496dd5c065362357c36636a6ce91f.jpg | 0 | 3500 |
| https://connect.facebook.net/en_GB/sdk.js | 1200000 | 2662 |
Minimize main-thread work — 4.6 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 | 2777.14 |
| Style & Layout | 1139.38 |
| Other | 315.236 |
| Script Parsing & Compilation | 155.476 |
| Parse HTML & CSS | 124.836 |
| Rendering | 97.224 |
| Garbage Collection | 28.5 |
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://b-ok.cc/resources/fonts/stolzl-book-webfont.4.woff2 | 232.97800001455 |
| https://b-ok.cc/resources/fonts/glyphicons-halflings-regular.woff2 | 237.86499997368 |
Accessibility
Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of b-ok.cc. 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.
`<input type="image">` elements have `[alt]` text Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
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 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.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5. For users with low vision who rely on screen magnification, ensure that zooming is not disabled.
Audio and video
`<video>` elements contain a `<track>` element with `[kind="captions"]` B-ok.cc may provide assistance to deaf or hearing-impaired users with captions on videos.
`<video>` elements contain a `<track>` element with `[kind="description"]` B-ok.cc 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 |
|---|
Image elements do not have `[alt]` attributes Provide short and descriptive alternative text where possible on informative elements.
| Failing Elements |
|---|
Form elements do not have associated labels Screen readers and other assistive technologies rely on labels to properly announce form controls.
| Failing Elements |
|---|
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 |
|---|
Internationalization and localization
`<html>` element does not have 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.
| Failing Elements |
|---|
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.
Best Practices
Indicates the recommended, best practices currently in place on the page and highlights the best practices that b-ok.cc 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.
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.
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 |
|---|---|
| Bootstrap | 3.3.7 |
| jQuery | 2.2.4 |
| Underscore | 1.4.4 |
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://b-ok.cc/ |
Includes front-end JavaScript libraries with known security vulnerabilities — 9 vulnerabilities detected 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.
| Library Version | Vulnerability Count | Highest Severity |
|---|---|---|
| 5 | Medium | |
| 4 | Medium |
Audits
Displays images with inappropriate size For maximum image clarity, ensure images have natural dimensions and are proportional to the display size and pixel ratio.
| URL | Displayed size | Actual size | Expected size |
|---|---|---|---|
| https://static.zlibcdn.com/covers300/books/c0/44/96/c04496dd5c065362357c36636a6ce91f.jpg | 58 x 87 | 76 x 115 | 153 x 229 |
SEO
Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for b-ok.cc. 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 b-ok.cc on mobile screens.
Document uses legible font sizes — 94.8% 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 |
|---|---|---|---|
| .plugin, .plugin button, .plugin input, .plugin label, .plugin select, .plugin td, .plugin textarea | 5.20% | 11px | |
| 94.80% | ≥ 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.
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.
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.
robots.txt is valid Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.
Mobile Friendly
Tap targets are not sized appropriately — 94% 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 |
|---|---|---|
| 130x27 | ||
| 128x27 |
Content Best Practices
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.
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 b-ok.cc. This includes details about web app manifests.Fast and reliable
Page load is fast enough on mobile networks Ensure that the page loads fast enough over a cellular network, to ensure good mobile user experience.
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.
Configured for a custom splash screen Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Sets 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
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 b-ok.cc on mobile screens.
Contains some content when JavaScript is not available Apps should display alternative content for when JavaScript is disabled.
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
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://b-ok.cc/ |
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
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: | 81.17.17.254 |
| Continent: | Europe |
| Country: | Switzerland  |
| Region: | |
| City: | |
| Longitude: | 8.1551 |
| Latitude: | 47.1449 |
| Currencies: | CHE CHF CHW |
| Languages: | French Swiss German Italian Romansh |
Web Hosting Provider
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 |
|---|---|
| ERANET INTERNATIONAL LIMITED | 8.219.119.180 |
Security
Visitor Safety
| Mature Content: | Not Likely |
| McAfee WebAdvisor Rating: | Unknown |
| WOT Rating: | |
| WOT Trustworthiness: | |
| WOT Child Safety: |
Note: Safety information is not guaranteed.
SSL/TLS Certificate
| Issued To: | b-ok.cc |
| Issued By: | Let's Encrypt Authority X3 |
| Valid From: | 27th May, 2020 |
| Valid To: | 25th August, 2020 |
| Subject: | CN = b-ok.cc |
| Hash: | 1a28e32f |
| Issuer: | CN = Let's Encrypt Authority X3 O = Let's Encrypt S = US |
| Version: | 2 |
| Serial Number: | 0x03D35E3DDD58A10CFE11ED546BC0BBDB1FD4 |
| Serial Number (Hex): | 03D35E3DDD58A10CFE11ED546BC0BBDB1FD4 |
| Valid From: | 27th May, 2024 |
| Valid To: | 25th August, 2024 |
| Signature Algorithm (Short Name): | RSA-SHA256 |
| Signature Algorithm (Long Name): | sha256WithRSAEncryption |
| Authority Key Identifier: | keyid:A8:4A:6A:63:04:7D:DD:BA:E6:D1:39:B7:A6:45:65:EF:F3:A8:EC:A1 |
| Extended Key Usage: | TLS Web Server Authentication, TLS Web Client Authentication |
| Certificate Policies: | Policy: 2.23.140.1.2.1 Policy: 1.3.6.1.4.1.44947.1.1.1 CPS: http://cps.letsencrypt.org |
| Authority Information Access: | OCSP - URI:http://ocsp.int-x3.letsencrypt.org CA Issuers - URI:http://cert.int-x3.letsencrypt.org/ |
| SCT List: | Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 6F:53:76:AC:31:F0:31:19:D8:99:00:A4:51:15:FF:77: 15:1C:11:D9:02:C1:00:29:06:8D:B2:08:9A:37:D9:13 Timestamp : May 27 16:21:50.210 2020 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:F0:54:A2:64:DC:14:6B:07:6E:EF:A2: A9:14:BA:2F:16:0D:88:10:D1:62:E6:E6:49:8B:56:42: D5:CB:01:33:94:02:21:00:DD:86:93:13:22:0D:D6:2C: BA:A6:D2:40:B5:5B:9E:4C:71:23:4A:9B:97:D6:B1:8A: E6:AF:34:C7:D5:E8:30:4C Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 07:B7:5C:1B:E5:7D:68:FF:F1:B0:C6:1D:23:15:C7:BA: E6:57:7C:57:94:B7:6A:EE:BC:61:3A:1A:69:D3:A2:1C Timestamp : May 27 16:21:50.249 2020 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:25:E9:2A:22:00:5F:E5:83:F4:16:BC:9D: 55:FD:BC:DD:86:F8:30:1D:E4:58:02:03:55:3B:1F:B0: B5:15:06:69:02:21:00:E8:5B:FA:D0:42:84:07:25:4A: 1A:E6:7C:E7:01:EF:60:42:1A:31:89:23:A3:DE:F9:6E: 6B:58:9C:09:35:FE:CD |
| Key Usage: | Digital Signature, Key Encipherment |
| Basic Constraints: | CA:FALSE |
| Subject Alternative Name: | DNS:b-ok.cc DNS:*.b-ok.cc |
Technical
DNS Lookup
A Records
| Host | IP Address | Class | TTL |
|---|---|---|---|
| b-ok.cc. | 81.17.17.254 | IN | 599 |
NS Records
| Host | Nameserver | Class | TTL |
|---|---|---|---|
| b-ok.cc. | ns1.z-lib.org. | IN | 3599 |
| b-ok.cc. | ns2.z-lib.org. | IN | 3599 |
SOA Records
| Domain Name | Primary NS | Responsible Email | TTL |
|---|---|---|---|
| b-ok.cc. | ns1.b-ok.cc. | hostmaster.b-ok.cc. | 3599 |
HTTP Response Headers
| HTTP-Code: | HTTP/1.1 200 OK |
| Server: | nginx |
| Date: | 2nd June, 2020 |
| Content-Type: | text/html; charset=UTF-8 |
| Connection: | keep-alive |
Whois Lookup
| Created: | 10th August, 2018 |
| Changed: | 23rd August, 2019 |
| Expires: | 10th September, 2020 |
| Registrar: | ERANET INTERNATIONAL LIMITED |
| Status: | clientTransferProhibited |
| Nameservers: | ns1.z-lib.org ns2.z-lib.org |
| Owner Name: | REDACTED FOR PRIVACY |
| Owner Organization: | REDACTED FOR PRIVACY |
| Owner Street: | REDACTED FOR PRIVACY |
| Owner Post Code: | REDACTED FOR PRIVACY |
| Owner City: | REDACTED FOR PRIVACY |
| Owner State: | MOSCOW |
| Owner Country: | RU |
| Owner Phone: | REDACTED FOR PRIVACY |
| Owner Email: | http://www.tnet.hk/whois/message_to_contact.php?domain=b-ok.cc&contact=Owner |
| Admin Name: | REDACTED FOR PRIVACY |
| Admin Organization: | REDACTED FOR PRIVACY |
| Admin Street: | 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: | http://www.tnet.hk/whois/message_to_contact.php?domain=b-ok.cc&contact=Admin |
| Tech Name: | REDACTED FOR PRIVACY |
| Tech Organization: | REDACTED FOR PRIVACY |
| Tech Street: | 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: | http://www.tnet.hk/whois/message_to_contact.php?domain=b-ok.cc&contact=Tech |
| Full Whois: | Domain name: b-ok.cc
Registry Domain ID: Registrar WHOIS Server: whois.eranet.com Registrar URL: http://www.eranet.com Updated Date: 2019-08-23T00:00:00Z Creation Date: 2018-10-08T20:26:11Z Registrar Registration Expiration Date: 2020-10-09T00:00:00Z Registrar: ERANET INTERNATIONAL LIMITED Registrar IANA ID: 1868 Registrar Abuse Contact Email: cs@now.cn Registrar Abuse Contact Phone: +86.7563810566 Reseller: Domain Status: clientTransferProhibited http://www.icann.org/epp#clientTransferProhibited Registry Registrant ID: REDACTED FOR PRIVACY Registrant Name: REDACTED FOR PRIVACY Registrant Organization: REDACTED FOR PRIVACY Registrant Street: REDACTED FOR PRIVACY Registrant City: REDACTED FOR PRIVACY Registrant State/Province: MOSCOW Registrant Postal Code: REDACTED FOR PRIVACY Registrant Country: RU Registrant Phone: REDACTED FOR PRIVACY Registrant Phone Ext: REDACTED FOR PRIVACY Registrant Fax: REDACTED FOR PRIVACY Registrant Fax Ext: REDACTED FOR PRIVACY Registrant Email: http://www.tnet.hk/whois/message_to_contact.php?domain=b-ok.cc&contact=Owner Registry Admin ID: REDACTED FOR PRIVACY Admin Name: REDACTED FOR PRIVACY Admin Organization: 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: http://www.tnet.hk/whois/message_to_contact.php?domain=b-ok.cc&contact=Admin Registry Tech ID: REDACTED FOR PRIVACY Tech Name: REDACTED FOR PRIVACY Tech Organization: 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: http://www.tnet.hk/whois/message_to_contact.php?domain=b-ok.cc&contact=Tech Name Server: ns1.z-lib.org Name Server: ns2.z-lib.org DNSSEC: unsigned URL of the ICANN WHOIS Data Problem Reporting System: http://wdprs.internic.net/ >>> Last update of WHOIS database: 2019-08-23T00:00:00Z <<< For more information on Whois status codes, please visit https://icann.org/epp Important Reminder: Per ICANN 2013RAA`s request, ERANET INTERNATIONAL LIMITED has modified domain names`whois format of dot com/net/cc/tv, you could refer to section 1.4 posted by ICANN on http://www.icann.org/en/resources/registrars/raa/approved-with-specs-27jun13-en.htm#whois The data in this whois database is provided to you for information purposes only, that is, to assist you in obtaining information about or related to a domain name registration record. We make this information available 'as is,' and do 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 to: (1)enable high volume, automated, electronic processes that stress or load this whois database system providing you this information; or (2) allow, enable, or otherwise support the transmission of mass unsolicited, commercial advertising or solicitations via direct mail, electronic mail, or by telephone. The compilation, repackaging, dissemination or other use of this data is expressly prohibited without prior written consent from us. We reserve the right to modify these terms at any time. By submitting this query, you agree to abide by these terms. For complete domain details go to:http://www.tnet.hk/whois/info.php?chrDomain=b-ok.cc If any of the information above is inaccurate, you must correct it by visiting our website or contact us. (If your review indicates that all of the information above is accurate, you do not need to take any action.) Please remember that under the terms of your registration agreement, the provision of false Whois information can be grounds for cancellation of your domain name registration. ERANET INTERNATIONAL LIMITED reserves the right to modify these terms at any time. <a target='_blank' id='href'><img id='pic'></a> <script type="text/javascript" src="https://www.now.cn/share/js/ad.js"></script>For complete domain details go to:http://www.tnet.hk/whois/info.php?chrDomain=b-ok.cc |
Nameservers
| Name | IP Address |
|---|---|
| ns1.z-lib.org | 116.203.86.112 |
| ns2.z-lib.org | 95.216.190.192 |
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