CODECHEF.COM CodeChef - Learn Coding / Practical Coding Courses by Experts

codechef.com Website Information

Daily Unique Visits: 135,024

Daily Page Views: 810,144

Income Per Day: $1,620

Estimated Value: $1,166,400

codechef.com is registered under .COM top-level domain. Please check other sites in .COM zone.

No name server records were found.

and is probably hosted by AMAZON-AES - Amazon.com, Inc., US. See the full list of other websites hosted by AMAZON-AES - Amazon.com, Inc., US.

The highest website codechef.com position in Alexa rank database was 7790 and the lowest rank position was 10622. Current position of codechef.com in Alexa rank database is 10622.

Desktop speed score of codechef.com (71/100) is better than the results of 52.66% of other sites and shows that the page desktop performance can be improved.

Mobile usability score of codechef.com (62/100) is better than the results of 7.29% of other sites and means that the page is not mobile-friendly.

Mobile speed score of codechef.com (54/100) is better than the results of 41.82% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

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codechef.com Alexa Rank

The traffic rank is based on three months of aggregated historical traffic data from millions of Alexa Toolbar users and is a combined measure of page views and users.


codechef.com whois

WHOIS gives you the ability to lookup any generic domains to find out the registered domain holder. WHOIS database are provided for information purposes only. It allows the public to check whether a specific domain name is still available or not and to obtain information related to the registration records of existing domain names.


Domain Name: CODECHEF.COM
Registry Domain ID: 155708899_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.PublicDomainRegistry.com
Registrar URL: http://www.publicdomainregistry.com
Updated Date: 2020-11-10T09:19:23Z
Creation Date: 2005-05-08T18:25:45Z
Registry Expiry Date: 2021-11-24T09:12:07Z
Registrar: PDR Ltd. d/b/a PublicDomainRegistry.com
Registrar IANA ID: 303
Registrar Abuse Contact Email: abuse-contact@publicdomainregistry.com
Registrar Abuse Contact Phone: +1.2013775952
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Name Server: NS-1074.AWSDNS-06.ORG
Name Server: NS-1990.AWSDNS-56.CO.UK
Name Server: NS-275.AWSDNS-34.COM
Name Server: NS-741.AWSDNS-28.NET
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2021-04-25T01:15:48Z

codechef.com server information

Servers Location

codechef.com desktop page speed rank

Last tested: 2016-08-03


Desktop Speed Medium
71/100

codechef.com Desktop Speed Test Quick Summary


priority - 17Optimize images

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priority - 10Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 20 blocking script resources and 2 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

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https://www.codechef.com/misc/jquery-popup-overlay/popupoverlay.js?H
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https://www.codechef.com/sites/all/modules/tableof…s/tableofcontents.js?H
https://www.codechef.com/em/libs/jquery/jquery.tools.js
https://www.codechef.com/bower_components/jquery/dist/jquery.min.js
https://www.codechef.com/bower_components/foundation/js/foundation.min.js
https://www.codechef.com/sites/all/themes/abessive…js/owl.carousel.min.js
https://www.codechef.com/sites/all/themes/abessive/js/app.js
https://www.codechef.com/misc/jquery-video-lightni…video-lightning.min.js

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priority - 7Avoid landing page redirects

Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.

Avoid landing page redirects for the following chain of redirected URLs.

http://codechef.com/
http://www.codechef.com/
https://www.codechef.com/

priority - 4Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

https://s3.amazonaws.com/codechef_shared/sites/all…mages/image-sprite.png (expiration not specified)
https://www.codechef.com/api/user/campaigns (expiration not specified)
https://www.codechef.com/todo/notification/count (expiration not specified)
https://static.hotjar.com/c/hotjar-167687.js?sv=5 (60 seconds)
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https://beacon.errorception.com/4e7c8fce06a9ab05530008e5.js (60 minutes)
https://www.google.com/jsapi (60 minutes)
https://ssl.google-analytics.com/ga.js (2 hours)

priority - 2Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 21.7KiB (66% reduction).

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codechef.com Desktop Resource Breakdown

Total Resources94
Number of Hosts16
Static Resources62
JavaScript Resources33
CSS Resources5

codechef.com mobile page speed rank

Last tested: 2019-12-06


Mobile Speed Bad
54/100

codechef.com Mobile Speed Test Quick Summary


priority - 40Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 21 blocking script resources and 2 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

https://www.codechef.com/sites/all/modules/jquery_…eplace/jquery.min.js?0
https://www.codechef.com/misc/drupal.js?0
https://www.codechef.com/misc/jquery-popup-overlay/popupoverlay.js?0
https://www.codechef.com/em/libs/cryptojs/aes.js?0
https://www.codechef.com/em/libs/common/common.js?0
https://www.codechef.com/sites/all/modules/codeche…s/js/localStorage.js?0
https://www.codechef.com/sites/all/modules/codeche…ons/js/keybinding.js?0
https://www.codechef.com/sites/all/modules/codeche…echefGenericModal.js?0
https://www.codechef.com/sites/all/modules/codeche…_common_functions.js?0
https://www.codechef.com/sites/all/modules/codeche…todo_notification.js?0
https://www.codechef.com/sites/all/modules/fbmod/js/fb_sdk.js?0
https://www.codechef.com/sites/all/modules/nice_menus/nice_menus.js?0
https://www.codechef.com/sites/all/modules/tableof…uery.scrollTo-min.js?0
https://www.codechef.com/sites/all/modules/tableof…y.localscroll-min.js?0
https://www.codechef.com/sites/all/modules/tableof…s/tableofcontents.js?0
https://www.codechef.com/em/libs/jquery/jquery.tools.js
https://www.codechef.com/bower_components/jquery/dist/jquery.min.js
https://www.codechef.com/bower_components/foundation/js/foundation.min.js
https://www.codechef.com/sites/all/themes/abessive…js/owl.carousel.min.js
https://www.codechef.com/sites/all/themes/abessive/js/app.js?v=2
https://www.codechef.com/misc/jquery-video-lightni…video-lightning.min.js

Optimize CSS Delivery of the following:

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https://www.codechef.com/sites/all/themes/abessive/css/app.css?v=9

priority - 26Avoid landing page redirects

Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.

Avoid landing page redirects for the following chain of redirected URLs.

http://codechef.com/
http://www.codechef.com/
https://www.codechef.com/

priority - 15Optimize images

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priority - 11Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

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https://static.hotjar.com/c/hotjar-167687.js?sv=5 (60 seconds)
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https://connect.facebook.net/en_US/fbevents.js (20 minutes)
https://connect.facebook.net/en_US/sdk.js (20 minutes)
https://connect.facebook.net/signals/config/244418…0350?v=2.9.14&r=stable (20 minutes)
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https://www.googleadservices.com/pagead/conversion.js (60 minutes)
https://ssl.google-analytics.com/ga.js (2 hours)
https://www.google-analytics.com/analytics.js (2 hours)

priority - 0Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 672B (39% reduction).

Minifying https://connect.facebook.net/en_US/sdk.js could save 672B (39% reduction) after compression.

codechef.com Mobile Resource Breakdown

Total Resources111
Number of Hosts21
Static Resources62
JavaScript Resources44
CSS Resources3

codechef.com mobile page usability

Last tested: 2019-12-06


Mobile Usability Bad
62/100

codechef.com Mobile Usability Test Quick Summary


priority - 40Use legible font sizes

The following text on your page renders in a way that may be difficult for some of your visitors to read. Use legible font sizes to provide a better user experience.

The following text fragments have a small font size. Increase the font size to make them more legible.

Forgot Password renders only 4 pixels tall (10 CSS pixels).

New User renders only 5 pixels tall (12 CSS pixels).

PRACTICE and 2 others render only 5 pixels tall (14 CSS pixels).

COMMUNITY and 2 others render only 4 pixels tall (11 CSS pixels).

December Challenge renders only 5 pixels tall (14 CSS pixels).

CodeChef DSA Certification and 2 others render only 5 pixels tall (14 CSS pixels).

New to Programming renders only 5 pixels tall (14 CSS pixels).

and don't know where to start? renders only 5 pixels tall (14 CSS pixels).

Start Here renders only 5 pixels tall (12 CSS pixels).

Recent Blog Posts and 5 others render only 7 pixels tall (17 CSS pixels).

December Challenge 2019 renders only 5 pixels tall (14 CSS pixels).

In Progress renders only 5 pixels tall (13 CSS pixels).

You can view a…blem tags here renders only 5 pixels tall (13 CSS pixels).

You can view a…em submissions renders only 5 pixels tall (13 CSS pixels).

here renders only 5 pixels tall (13 CSS pixels).

32.7K and 9 others render only 7 pixels tall (18 CSS pixels).

views and 9 others render only 5 pixels tall (12 CSS pixels).

Can anyone tel…why my sol... and 9 others render only 5 pixels tall (13 CSS pixels).

06-12-2019 17:19:50 and 9 others render only 4 pixels tall (11 CSS pixels).

2★ and 1 others render only 4 pixels tall (10 CSS pixels).

smile_forever and 9 others render only 5 pixels tall (12 CSS pixels).

View and 9 others render only 4 pixels tall (10 CSS pixels).

6★ and 2 others render only 4 pixels tall (10 CSS pixels).

3★ and 2 others render only 4 pixels tall (10 CSS pixels).

4★ renders only 4 pixels tall (10 CSS pixels).

Announcing the…n January Exam renders only 5 pixels tall (14 CSS pixels).

The Early Bird…December 2019. renders only 5 pixels tall (12 CSS pixels).

Know more renders only 5 pixels tall (12 CSS pixels).

Sep and 9 others render only 4 pixels tall (11 CSS pixels).

ICYMI: Here’s…Long Challenge and 4 others render only 5 pixels tall (12 CSS pixels).

CodeChef renders only 7 pixels tall (18 CSS pixels).

529K likes renders only 5 pixels tall (12 CSS pixels).

Like Page renders only 5 pixels tall (12 CSS pixels).

Be the first o…s to like this renders only 5 pixels tall (12 CSS pixels).

CodeChef is a…ming community renders only 4 pixels tall (11 CSS pixels).

About CodeChef renders only 4 pixels tall (11 CSS pixels).

CEO's Corner and 1 others render only 4 pixels tall (11 CSS pixels).

In order to re…in an email to and 1 others render only 4 pixels tall (11 CSS pixels).

copyright@codechef.com and 1 others render only 4 pixels tall (11 CSS pixels).

167.99.102.248, 66.249.84.6 and 3 others render only 4 pixels tall (11 CSS pixels).

Practice Section and 2 others render only 5 pixels tall (13 CSS pixels).

- Monthly Prog…and Lunchtime and 2 others render only 5 pixels tall (13 CSS pixels).

judge accepts…r the multiple and 16 others render only 5 pixels tall (12 CSS pixels).

computer programming skills and 13 others render only 5 pixels tall (12 CSS pixels).

Programming Tools and 3 others render only 5 pixels tall (13 CSS pixels).
Upcoming Coding Contests and 21 others render only 5 pixels tall (12 CSS pixels).
to know more.…e our website. and 3 others render only 5 pixels tall (12 CSS pixels).

Privacy Policy and 1 others render only 5 pixels tall (12 CSS pixels).

Okay renders only 5 pixels tall (13 CSS pixels).

priority - 14Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.

The following tap targets are close to other nearby tap targets and may need additional spacing around them.

The tap target <input id="edit-pass" type="password" name="pass" class="form-text required new-input"> is close to 1 other tap targets.

The tap target <a href="/user/password">Forgot Password</a> is close to 2 other tap targets.

The tap target <a id="button_google" class="icon-social oa…-small connect"> is close to 1 other tap targets.

The tap target <a id="button_github" class="icon-social oa…-small connect"> is close to 2 other tap targets.

The tap target <a id="button_facebook" class="icon-social oa…-small connect"> is close to 1 other tap targets.

The tap target <a href="/problems/school">PRACTICE</a> and 2 others are close to other tap targets.

The tap target <a href="/community">COMMUNITY</a> and 2 others are close to other tap targets.

The tap target <div id="home-slider-dots" class="owl-dots">December Chall…Top Performers</div> is close to 2 other tap targets.

The tap target <div id="home-slider-dots" class="owl-dots">December Chall…Top Performers</div> is close to 2 other tap targets.

The tap target <div id="home-slider-dots" class="owl-dots">December Chall…Top Performers</div> and 2 others are close to other tap targets.

The tap target <div class="owl-prev">prev</div> is close to 3 other tap targets.

The tap target <div class="owl-next">next</div> is close to 3 other tap targets.

The tap target <a href="/getting-started" class="button blue">Start Here</a> is close to 2 other tap targets.

The tap target <a href="https://www.fa…k.com/CodeChef" class="fb">Facebook</a> is close to 3 other tap targets.

The tap target <a href="https://twitter.com/CodeChef" class="tw">Twitter</a> is close to 4 other tap targets.

The tap target <a href="https://plus.g…codechef/posts" class="gp">Google+</a> is close to 4 other tap targets.

The tap target <a href="https://www.yo…dechefofficial" class="yt">YouTube</a> is close to 4 other tap targets.

The tap target <a href="https://www.qu…topic/CodeChef" class="qu">Quora</a> is close to 2 other tap targets.

The tap target <a href="https://discus…ef.com/t/45798">Long Challenges</a> and 9 others are close to other tap targets.

The tap target <a href="/users/hellaweird">2★hellaweird</a> and 1 others are close to other tap targets.

The tap target <a href="/users/hellaweird">2★hellaweird</a> and 9 others are close to other tap targets.

The tap target <a href="/users/ssjgz">6★ssjgz</a> and 2 others are close to other tap targets.

The tap target <a href="/users/abhj">3★abhj</a> and 2 others are close to other tap targets.

The tap target <a href="/users/jprm2">4★jprm2</a> is close to 1 other tap targets.

The tap target <img src="https://sconte…ac&amp;oe=5E4234D3" class="_1drn _-s img"> is close to 1 other tap targets.

The tap target <a href="/ceoscorner/">CEO&#39;s Corner</a> and 1 others are close to other tap targets.

The tap target <a href="http://www.sphere-research.com">Sphere Research Labs</a> is close to 1 other tap targets.

The tap target <a href="/ide">Online IDE</a> and 21 others are close to other tap targets.

priority - 10Configure the viewport

Your page does not have a viewport specified. This causes mobile devices to render your page as it would appear on a desktop browser, scaling it down to fit on a mobile screen. Configure a viewport to allow your page to render properly on all devices.

codechef.com HTML validation

Errors

Bad start tag in “img” in “head”.

Line: 36 Column: 9 - 23
"...> <img height="1" width="1" src="https://www.facebook.com/tr?id=277309139459596&ev=PageView &noscript=1"/> ..."

Element “head” is missing a required instance of child element “title”.

Line: 36 Column: 9 - 23
"...> <img height="1" width="1" src="https://www.facebook.com/tr?id=277309139459596&ev=PageView &noscript=1"/> ..."

Bad value “https://www.facebook.com/tr?id=277309139459596&ev=PageView &noscript=1” for attribute “src” on element “img”: Tab, new line or carriage return found.

Line: 36 Column: 9 - 23
"...> <img height="1" width="1" src="https://www.facebook.com/tr?id=277309139459596&ev=PageView &noscript=1"/> ..."

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Line: 36 Column: 9 - 23
"...> <img height="1" width="1" src="https://www.facebook.com/tr?id=277309139459596&ev=PageView &noscript=1"/> ..."

Stray end tag “noscript”.

Line: 37 Column: 9 - 19
"...> </noscript> ..."

A “charset” attribute on a “meta” element found after the first 1024 bytes.

Line: 38 Column: - 63
"... charset="utf-8"> <link rel..."

Attribute “charset” not allowed on element “meta” at this point.

Line: 38 Column: 43 - 64
"...Code --> <meta charset="utf-8"> <l..."

Element “meta” is missing one or more of the following attributes: “content”, “itemprop”, “property”.

Line: 38 Column: 43 - 64
"...Code --> <meta charset="utf-8"> <l..."

A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.

Line: 38 Column: 43 - 64
"...Code --> <meta charset="utf-8"> <l..." Line: 52 Column: 1 - 69
"...g</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta..."

A “link” element must not appear as a descendant of a “body” element unless the “link” element has an “itemprop” attribute or has a “rel” attribute whose value contains “dns-prefetch”, “pingback”, “preconnect”, “prefetch”, “preload”, “prerender”, or “stylesheet”.

Line: 47 Column: 3 - 57
"...com" /> <link rel="canonical" href="http://www.codechef.com/"/> <s..." Line: 55 Column: 1 - 73
"...mming" /> <link rel="shortcut icon" href="/misc/favicon.ico" type="image/x-icon" /> <scri..."

Element “title” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)

Line: 50 Column: 2 - 8
".../script> <title> Pro..."

Attribute “http-equiv” not allowed on element “meta” at this point.

Line: 52 Column: 1 - 69
"...g</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta..."

Element “meta” is missing one or more of the following attributes: “itemprop”, “property”.

Line: 52 Column: 1 - 69
"...g</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta..." Line: 53 Column: 1 - 128
"...utf-8" /> <meta name="keywords" content="programming competition, programming contest, online programming, online computer programming" /> <meta..." Line: 54 Column: 1 - 187
"...mming" /> <meta name="description" content="Programming Competition: Join Online Programming Contest. CodeChef hosts Online Programming Competition, Programming Contest and Computer Programming" /> <link..." Line: 82 Column: 1 - 94
"...</script> <meta name="google-site-verification" content="u_r-UtobgmZQQ9jZd9_KqvQl-qc42N6HE0TOBxeWghg" /> </hea..."

A document must not include more than one “meta” element with a “http-equiv” attribute whose value is “content-type”.

Line: 52 Column: 1 - 69
"...g</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta..."

Attribute “name” not allowed on element “meta” at this point.

Line: 53 Column: 1 - 128
"...utf-8" /> <meta name="keywords" content="programming competition, programming contest, online programming, online computer programming" /> <meta..." Line: 54 Column: 1 - 187
"...mming" /> <meta name="description" content="Programming Competition: Join Online Programming Contest. CodeChef hosts Online Programming Competition, Programming Contest and Computer Programming" /> <link..." Line: 82 Column: 1 - 94
"...</script> <meta name="google-site-verification" content="u_r-UtobgmZQQ9jZd9_KqvQl-qc42N6HE0TOBxeWghg" /> </hea..."

Stray end tag “head”.

Line: 83 Column: 1 - 7
"...eWghg" /> </head> <body..."

Start tag “body” seen but an element of the same type was already open.

Line: 84 Column: 1 - 24
"...> </head> <body class="sidebars"> <!-..."

Cannot recover after last error. Any further errors will be ignored.

Line: 84 Column: 1 - 24
"...> </head> <body class="sidebars"> <!-..."

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codechef.com Ping

Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.


codechef.com TRACEROUTE

Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.