Code.org - SEO Checker

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Overview of the SEO Check
Meta information
80% 
Page quality
48% 
Page structure
50% 
Link structure
63% 
Server
73% 
External factors
100% 
SEO Score
Response time
0.79 s
File size
267.30 kB
Words
355
Media files
16
Number of links
63 internal / 42 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Computer science and artificial intelligence curriculum for K-12 Schools | Code.org
The page title should be shorter than 580 pixels. It is 736 pixels long. Optimize title
There are no duplicate words in the title
Meta description
(Critically important)
Code.org provides free computer science and AI curriculum, plus professional development to support any teacher—no coding experience needed!
The length of the meta description is perfect. (902 pixels out of 1000 max pixel length)
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
No canonical link is specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en-us
Server location: United States of America
The following language is defined by HTML: en-us
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
The domain is no subdomain.
The domain length is good.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The charset encoding (UTF-8) is set correctly.
Doctype
(Nice to have)
The doctype HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
google-site-verificationEWBLxcxuqqtcdWikkxAOnMoaawa6XDoEPlvwO6wOg-A
descriptionCode.org provides free computer science and AI curriculum, plus professional development to support any teacher—no coding experience needed!
viewportwidth=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no
article:publisherhttps://www.facebook.com/Code.org
langen-us
twitter:site@codeorg
twitter:urlhttps://code.org/
twitter:titleComputer science and artificial intelligence curriculum for K-12 Schools
twitter:descriptionCode.org provides free computer science and AI curriculum, plus professional development to support any teacher—no coding experience needed!
twitter:image:srchttps://code.org/images/default-og-image.png
twitter:cardphoto
fb:app_id500177453358606
og:site_nameCode.org
og:typearticle
og:urlhttps://code.org/
og:titleComputer science and artificial intelligence curriculum for K-12 Schools
og:descriptionCode.org provides free computer science and AI curriculum, plus professional development to support any teacher—no coding experience needed!
og:imagehttps://code.org/images/default-og-image.png
og:image:width1220
og:image:height640
Content-Typetext/html; charset=UTF-8
X-UA-CompatibleIE=Edge

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Page quality

Content
(Critically important)
Some words from the page title are not used within the pages content
Words from the H1 heading are not used in the page content.
There are only 355 words on this page. Good pages should have about 800 words of useful content.
The average number of words per sentence of 7.5 words is low.
23.1% of the text are stop words.
The page contains a listing, which indicates a good text layout.
4 paragraphs were found on this page.
No placeholders texts or images were found.
There are no duplicates on the site.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
A viewport "width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no" is provided.
At least one Apple touch icon is specified.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 7 tags for this page.
Image SEO
(Somewhat important)
9 images have no alt attribute. The content of alt attributes is used by search engines.
Social Networks
(Nice to have)
This page is optimized perfectly for social networks.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
https://code.org/images/logo-inverse.svgCode.org Home
...images/header/header-sprite-lab-icon.pngNo alt attribute provided
...red/images/header/header-artist-icon.pngNo alt attribute provided
...ed/images/header/header-app-lab-icon.pngNo alt attribute provided
...d/images/header/header-game-lab-icon.pngNo alt attribute provided
.../images/header/header-music-lab-icon.pngNo alt attribute provided
...mages/header/header-dance-party-icon.pngNo alt attribute provided
...ages/header/header-all-projects-icon.pngNo alt attribute provided
...avatars/amazon_future_engineer_light.pngAmazon Future Engineer
...images/Powered-By_logo-horiz_RGB_REV.pngPowered by AWS Cloud Computing
/images/icons/medium-monogram-white.pngNo alt attribute provided
/images/icons/medium-monogram-white.pngNo alt attribute provided
...images/Powered-By_logo-horiz_RGB_REV.pngPowered by AWS Cloud Computing

Page structure

H1 heading
(Critically important)
Make Music. Learn Code.
Too many H1 headings
Headings
(Important)
The structure of headings is missing one or more levels. Do not skip heading levels.

Heading structure

Heading levelContent
H1 Make Music. Learn Code.
H1 Code.org thanks
H4 Please select your language
Some anchor texts are used more than once.
The number of internal links is ok.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are too many external links (42) on this page.

Found links on this page

LinkAttributesAnchor text
https://support.code.org/hc/en...External Subdomain one of our supported browsers
https://code.org/IMG-ALT Code.org Home
https://code.org/studentsLearn
https://code.org/teachTeach
https://code.org/administratorsDistricts
https://code.org/promoteStats
https://code.org/donateDonate
https://studio.code.org/incubatorExternal Subdomain Incubator
https://code.org/aboutAbout
https://studio.code.org/projec...External Subdomain Sprite Lab
https://studio.code.org/projec...External Subdomain Artist
https://studio.code.org/projec...External Subdomain App Lab
https://studio.code.org/projec...External Subdomain Game Lab
https://code.org/musicMusic Lab
https://studio.code.org/projec...External Subdomain Dance Party
https://studio.code.org/projectsExternal Subdomain View all projects...
https://studio.code.org/users/...External Subdomain Sign in
https://studio.code.org/users/...External Subdomain Create account
https://support.code.org/New window Nofollow External Subdomain Help and support
https://support.code.org/hc/en...New window Nofollow External Subdomain Report a problem
https://studio.code.org/users/...External Subdomain Text duplicate Sign in
https://studio.code.org/users/...External Subdomain Text duplicate Create account
https://code.org/studentsText duplicate Learn
https://code.org/teachEducator Overview
https://studio.code.org/catalogExternal Subdomain Course Catalog
/educate/curriculum/elementary...Elementary School
/educate/curriculum/middle-schoolMiddle School
/educate/curriculum/high-schoolHigh School
https://hourofcode.com/External Hour of Code
/educate/curriculum/3rd-partyBeyond Code.org
https://forum.code.org/External Subdomain Online Community
https://code.org/educate/itTechnical Requirements
/educate/resources/videosTools and Videos
https://code.org/administratorsText duplicate Districts
https://code.org/promoteText duplicate Stats
https://code.org/donateText duplicate Donate
https://studio.code.org/incubatorExternal Subdomain Text duplicate Incubator
https://code.org/aboutAbout Us
https://code.org/about/leadershipLeadership
https://code.org/about/donorsDonors
https://code.org/about/partnersPartners
https://code.org/about/teamFull Team
https://code.org/about/newsNewsroom
https://code.org/about/jobsCareers
https://code.org/contactContact Us
https://code.org/faqFAQs
https://code.org/privacyPrivacy Policy
https://code.org/cookiesCookie Notice
https://code.org/tosTerms of Service
https://support.code.org/New window Nofollow External Subdomain Text duplicate Help and support
https://support.code.org/hc/en...New window Nofollow External Subdomain Text duplicate Report a problem
https://studio.code.org/s/musi...External Subdomain Try Music Lab
https://code.org/musicLearn more
https://studio.code.org/coursesExternal Subdomain 99M students on Code.org
https://code.org/diversity42M of our students are young women
https://studio.code.org/projec...External Subdomain 332M projects created on Code.org
https://code.org/teach2.9M teachers use Code.org
https://code.org/advocacy50 All 50 states support computer science
https://hourofcode.com/External Hour of Code Explore, play, and create!
https://code.org/hourofcodeTry the Hour of Code
https://hourofcode.com/External About the Hour of Code
https://hourofcode.com/eventsExternal Host an Hour of Code
https://code.org/studentsStudents Explore our courses
/student/elementaryText duplicate Elementary School
/student/middle-highMiddle school +
https://code.org/careers-with-csText duplicate Careers
https://code.org/teachEducators Teach your students
/educate/curriculum/elementary...Elementary school
/educate/curriculum/middle-schoolMiddle school
/educate/curriculum/high-schoolHigh school
https://code.org/helpGet involved Support diversity in computing
https://code.org/promoteSee the stats
https://code.org/yourschoolBring CS to your school
https://code.org/donateText duplicate Donate
https://studio.code.org/projec...External Subdomain Over 332 million Code.org projects created
https://code.org/donateText duplicate Donate
https://code.org/about/supportersSee more supporters
https://code.org/privacyText duplicate Privacy Policy
https://code.org/cookiesText duplicate Cookie Notice
https://code.org/aboutText duplicate About
https://code.org/partnersText duplicate Partners
https://medium.com/@codeorgNew window Nofollow External Blog
https://code.org/donateText duplicate Donate
https://code.org/shopStore
http://support.code.org/New window Nofollow External Subdomain Support
https://code.org/tosTerms
https://aws.amazon.com/what-is...External Subdomain IMG-ALT Powered by AWS Cloud Computing
https://www.facebook.com/Code....New window External Subdomain No Text
https://twitter.com/codeorgNew window External No Text
https://www.instagram.com/code...New window External Subdomain No Text
https://medium.com/@codeorgNew window External No Text
https://code.org/privacyText duplicate Privacy Policy
https://code.org/cookiesText duplicate Cookie Notice
https://code.org/aboutText duplicate About
https://code.org/partnersText duplicate Partners
https://medium.com/@codeorgNew window External Text duplicate Blog
https://code.org/donateText duplicate Donate
https://store.code.org/External Subdomain Text duplicate Store
https://support.code.org/New window External Subdomain Text duplicate Support
https://code.org/tosText duplicate Terms
https://www.facebook.com/Code.orgNew window External Subdomain No Text
https://twitter.com/codeorgNew window External No Text
https://www.instagram.com/codeorgNew window External Subdomain No Text
https://medium.com/@codeorgNew window External No Text
https://aws.amazon.com/what-is...External Subdomain Text duplicate IMG-ALT Powered by AWS Cloud Computing

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://code.org/"
HTTP header
(Important)
The web server version is sent within the HTTP header.
No X-Powered HTTP header is sent.
The web server transmits the web page (HTML) in compressed form.
Performance
(Somewhat important)
The page response time of 0.79 seconds is longer than the recommended limit of 0.4 seconds. A high response time unnecessarily slows down search engine crawling and results in bad user experience as well.
The file size of the HTML document is fine (267 kB).

HTTP Response Header

NameValue
content-typetext/html;charset=utf-8
dateThu, 15 May 2025 09:42:40 GMT
content-languageen
strict-transport-securitymax-age=31536000
set-cookie178 Characters
servernginx/1.18.0 (Ubuntu)
cache-controlpublic, must-revalidate, max-age=14400, s-maxage=86400
link</images/music-lab/music-lab-homepage-banner-bg.png>; rel=preload; as=image; media="not all and (-webkit-min-device-pixel-ratio: 2), not all and (min-resolution: 192dpi)";,</images/music-lab/music-lab-homepage-banner-bg.png>; rel=preload; as=image; media="(-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi)";
x-xss-protection1; mode=block
x-content-type-optionsnosniff
x-frame-options
content-security-policydefault-src 'self' https:; frame-src 'self' https: blob:; worker-src 'self' blob: ; child-src 'self' blob: ; script-src 'self' https: 'unsafe-inline' https://vaas.acapela-group.com 'unsafe-eval'; style-src 'self' https: 'unsafe-inline'; img-src 'self' https: data: blob: https://*.code.org; font-src 'self' https: data:; connect-src 'self' https: https://api.pusherapp.com wss://ws.pusherapp.com http://localhost:8080 https://curriculum.code.org/ wss://*.code.org; media-src 'self' https: data: https://*.code.org http://vaas.acapela-group.com; report-uri //code.org/https/mixed-content; frame-ancestors 'self' https://*.schoology.com http://*.disney.com http://*.diznee.net cuantrix.mx code.org studio.code.org curriculum.code.org https://*.iap.lausd.net
content-encodinggzip
varyAccept-Encoding
x-cacheMiss from cloudfront
via1.1 5dbbe1c6db9a003131a63be8ded250a4.cloudfront.net (CloudFront)
x-amz-cf-popFRA56-P8
x-amz-cf-idSeUTPnFnrRtbNTwZEQV2yZnCULF1cmqVWonNgLACrhH_UPNSBnCkFQ==
statuscode200
http_versionHTTP/2

External factors

This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 7,250 referring domains.
This page has 268,898 backlinks.
This page has backlinks from 5,559 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

User-agent: *

Disallow:

Similar sites

Search preview

code.org
Computer science and artificial intelligence curriculum for K-12 Sc...
Code.org provides free computer science and AI curriculum, plus professional development to support any teacher—no coding experience needed!

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
Code90%Check
org74%Check
CODE logo64%Check
computer58%Check
science58%Check
Computer Science58%Check
Music52%Check
Support Computer52%Check
Learn50%Check
Make50%Check
Show more keywords and terms

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