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Stack Overflow - Where Developers Learn, Share, & Build Careers
Stack Overflow is the largest, most trusted online community for developers to learn, share​ ​their programming ​knowledge, and build their careers.
https://stackoverflow.com/
2 high issues
6.1%
2 medium issues
6.1%
4 low issues
12.1%
25 tests passed
75.8%
0.19 seconds
52.66 kB
40 resources
Secure
Seo
Title
The title tag must be between 1 and 60 characters.
The current title has 63 characters.
Meta description
The meta description tag is good.
Stack Overflow is the largest, most trusted online community for developers to learn, share​ ​their programming ​knowledge, and build their careers.
Headings
The headings are properly set.
  1. Every developer has a tab open to Stack Overflow
  1. Find the best answer to your technical question, help others answer theirs
  2. Want a secure, private space for your technical knowledge?
  3. A public platform building the definitive collection of coding questions & answers
  4. A private collaboration & knowledge sharing SaaS platform for companies
  5. Ensure your company stays on course
  6. Free
  7. Basic
  8. Business
  9. Enterprise
  10. Integrates with and improves other tools
  11. Additional products that reach and engage developers & technologists…
  12. Explore technical topics and other disciplines across 170+ Q&A communities
  1. current community
  2. your communities
  3. more stack exchange communities
  4. Increase productivity
  5. Accelerate time to market
  6. Protect institutional knowledge
  7. DevOps engineers
  8. Data scientists
  9. Software engineers
  10. Support teams
  11. Engineering leaders
  1. Collectives™ on Stack Overflow
  2. Stack Overflow
  3. Products
  4. Company
  5. Stack Exchange Network
Content keywords
The content has relevant keywords.
stackoverflowwheredeveloperslearnsharebuild
Image keywords
There are 11 images with missing alt attributes.
  1. https://cdn.sstatic.net/Img/teams/teams-illo-free-sidebar-promo.svg?v=47faa659a05e
  2. https://cdn.sstatic.net/Img/home/illo-code.svg?v=b7ee00fff9d8
  3. https://cdn.sstatic.net/Img/home/illo-code.svg?v=b7ee00fff9d8
  4. https://cdn.sstatic.net/Img/product/teams/screens/illo-question.png?v=14c5863a5550
  5. https://cdn.sstatic.net/Img/product/teams/screens/illo-for-you.png?v=ab49238abe04
  6. https://cdn.sstatic.net/Img/product/teams/screens/illo-home-search.png?v=1ccd850cd929
  7. https://cdn.sstatic.net/Img/home/illo-integrations-left.png?v=0a97d470e180
  8. https://cdn.sstatic.net/Img/product/teams/microsoft-integration/microsoft-teams-logo.svg?v=00361aadd408
  9. https://cdn.sstatic.net/Img/home/illo-integrations-right.png?v=90c26b9154c7
  10. https://cdn.sstatic.net/Img/home/illo-se.svg?v=f7e844293cc5
  11. https://cdn.sstatic.net/Img/home/illo-se.svg?v=f7e844293cc5
SEO friendly URL
The URL is SEO friendly.
https://stackoverflow.com/
404 page
The website has 404 error pages.
https://stackoverflow.com/404-78197a07f9e3347d279263c1a1352990
Robots.txt
The webpage can be accessed by search engines.
Noindex
The webpage does not have a noindex tag set.
In-page links
The number of links on the webpage is okay.
Language
The webpage has the language declared.
en
Favicon
The webpage has a favicon.
https://cdn.sstatic.net/Sites/stackoverflow/Img/apple-touch-icon.png?v=c78bd457575a
Performance
Text compression
The HTML file is compressed.
Load time
The webpage loaded in 0.19 seconds.
Page size
The size of the HTML webpage is 52,655.00.
HTTP requests
There are fewer than 40 HTTP requests on the webpage.
  1. https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js
  2. https://cdn.sstatic.net/Js/third-party/npm/@stackoverflow/stacks/dist/js/stacks.min.js?v=facbc6b2f3b6
  3. https://cdn.sstatic.net/Js/stub.en.js?v=0e3ada576039
  4. https://cdn.sstatic.net/Js/product/animations.en.js?v=0c821ba44331
  5. https://cdn.sstatic.net/Js/product/lazy-load-images.en.js?v=df15501e9ca6
  6. https://www.googletagmanager.com/gtag/js?id=G-WCZ03SZFCQ
  1. https://cdn.sstatic.net/Shared/stacks.css?v=5ad0f45f4799
  2. https://cdn.sstatic.net/Sites/stackoverflow/primary.css?v=88f55b999217
  3. https://cdn.sstatic.net/Shared/Product/product.css?v=f5d2db9a2252
  4. https://cdn.sstatic.net/Shared/Channels/channels.css?v=d098999fc478
  1. https://cdn.sstatic.net/Img/teams/teams-illo-free-sidebar-promo.svg?v=47faa659a05e
  2. https://cdn.sstatic.net/Img/home/illo-code.svg?v=b7ee00fff9d8
  3. https://cdn.sstatic.net/Img/home/illo-code.svg?v=b7ee00fff9d8
  4. https://cdn.sstatic.net/Img/home/illo-public.svg?v=14bd5a506009
  5. https://cdn.sstatic.net/Img/home/illo-teams.svg?v=7e543f14fcc0
  6. https://cdn.sstatic.net/Img/product/teams/logos/box-alt.svg?v=eb76fd9d884f
  7. https://cdn.sstatic.net/Img/product/teams/logos/expensify-alt.svg?v=375099b85ce5
  8. https://cdn.sstatic.net/Img/product/teams/logos/intercom-alt.svg?v=3eda71aed47c
  9. https://cdn.sstatic.net/Img/product/teams/logos/microsoft-alt.svg?v=e57319450314
  10. https://cdn.sstatic.net/Img/product/teams/logos/bloomberg-alt.svg?v=9fc4f6650377
  11. https://cdn.sstatic.net/Img/product/teams/screens/illo-question.png?v=14c5863a5550
  12. https://cdn.sstatic.net/Img/product/teams/screens/illo-for-you.png?v=ab49238abe04
  13. https://cdn.sstatic.net/Img/product/teams/screens/illo-home-search.png?v=1ccd850cd929
  14. https://cdn.sstatic.net/Img/home/illo-integrations-left.png?v=0a97d470e180
  15. https://cdn.sstatic.net/Img/product/teams/microsoft-integration/microsoft-teams-logo.svg?v=00361aadd408
  16. https://cdn.sstatic.net/Img/home/illo-integrations-right.png?v=90c26b9154c7
  17. https://cdn.sstatic.net/Sites/apple/Img/apple-touch-icon.png?v=daa7ff1d953e
  18. https://cdn.sstatic.net/Sites/unix/Img/apple-touch-icon.png?v=5cf7fe716a89
  19. https://cdn.sstatic.net/Sites/ai/Img/apple-touch-icon.png?v=f14d741b295c
  20. https://cdn.sstatic.net/Sites/softwareengineering/Img/apple-touch-icon.png?v=5e581fc45e58
  21. https://cdn.sstatic.net/Sites/askubuntu/Img/apple-touch-icon.png?v=e16e1315edd6
  22. https://cdn.sstatic.net/Sites/salesforce/Img/apple-touch-icon.png?v=4c87c90207b3
  23. https://cdn.sstatic.net/Img/home/illo-se.svg?v=f7e844293cc5
  24. https://cdn.sstatic.net/Sites/serverfault/Img/apple-touch-icon.png?v=6c3100d858bb
  25. https://cdn.sstatic.net/Sites/superuser/Img/apple-touch-icon.png?v=0ad5b7a83e49
  26. https://cdn.sstatic.net/Sites/dba/Img/apple-touch-icon.png?v=cdcd5ff7b29e
  27. https://cdn.sstatic.net/Sites/quantumcomputing/Img/apple-touch-icon.png?v=2af3cc2b87e8
  28. https://cdn.sstatic.net/Sites/gamedev/Img/apple-touch-icon.png?v=0cfb55927bd2
  29. https://cdn.sstatic.net/Sites/networkengineering/Img/apple-touch-icon.png?v=d66b1118cec8
  30. https://cdn.sstatic.net/Img/home/illo-se.svg?v=f7e844293cc5
Image format
There are 30 images that are not using the AVIF, WebP format.
  1. https://cdn.sstatic.net/Img/teams/teams-illo-free-sidebar-promo.svg?v=47faa659a05e
  2. https://cdn.sstatic.net/Img/home/illo-code.svg?v=b7ee00fff9d8
  3. https://cdn.sstatic.net/Img/home/illo-code.svg?v=b7ee00fff9d8
  4. https://cdn.sstatic.net/Img/home/illo-public.svg?v=14bd5a506009
  5. https://cdn.sstatic.net/Img/home/illo-teams.svg?v=7e543f14fcc0
  6. https://cdn.sstatic.net/Img/product/teams/logos/box-alt.svg?v=eb76fd9d884f
  7. https://cdn.sstatic.net/Img/product/teams/logos/expensify-alt.svg?v=375099b85ce5
  8. https://cdn.sstatic.net/Img/product/teams/logos/intercom-alt.svg?v=3eda71aed47c
  9. https://cdn.sstatic.net/Img/product/teams/logos/microsoft-alt.svg?v=e57319450314
  10. https://cdn.sstatic.net/Img/product/teams/logos/bloomberg-alt.svg?v=9fc4f6650377
  11. https://cdn.sstatic.net/Img/product/teams/screens/illo-question.png?v=14c5863a5550
  12. https://cdn.sstatic.net/Img/product/teams/screens/illo-for-you.png?v=ab49238abe04
  13. https://cdn.sstatic.net/Img/product/teams/screens/illo-home-search.png?v=1ccd850cd929
  14. https://cdn.sstatic.net/Img/home/illo-integrations-left.png?v=0a97d470e180
  15. https://cdn.sstatic.net/Img/product/teams/microsoft-integration/microsoft-teams-logo.svg?v=00361aadd408
  16. https://cdn.sstatic.net/Img/home/illo-integrations-right.png?v=90c26b9154c7
  17. https://cdn.sstatic.net/Sites/apple/Img/apple-touch-icon.png?v=daa7ff1d953e
  18. https://cdn.sstatic.net/Sites/unix/Img/apple-touch-icon.png?v=5cf7fe716a89
  19. https://cdn.sstatic.net/Sites/ai/Img/apple-touch-icon.png?v=f14d741b295c
  20. https://cdn.sstatic.net/Sites/softwareengineering/Img/apple-touch-icon.png?v=5e581fc45e58
  21. https://cdn.sstatic.net/Sites/askubuntu/Img/apple-touch-icon.png?v=e16e1315edd6
  22. https://cdn.sstatic.net/Sites/salesforce/Img/apple-touch-icon.png?v=4c87c90207b3
  23. https://cdn.sstatic.net/Img/home/illo-se.svg?v=f7e844293cc5
  24. https://cdn.sstatic.net/Sites/serverfault/Img/apple-touch-icon.png?v=6c3100d858bb
  25. https://cdn.sstatic.net/Sites/superuser/Img/apple-touch-icon.png?v=0ad5b7a83e49
  26. https://cdn.sstatic.net/Sites/dba/Img/apple-touch-icon.png?v=cdcd5ff7b29e
  27. https://cdn.sstatic.net/Sites/quantumcomputing/Img/apple-touch-icon.png?v=2af3cc2b87e8
  28. https://cdn.sstatic.net/Sites/gamedev/Img/apple-touch-icon.png?v=0cfb55927bd2
  29. https://cdn.sstatic.net/Sites/networkengineering/Img/apple-touch-icon.png?v=d66b1118cec8
  30. https://cdn.sstatic.net/Img/home/illo-se.svg?v=f7e844293cc5
JavaScript defer
The are 3 javascript resources without the defer attribute.
  1. https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js
  2. https://cdn.sstatic.net/Js/stub.en.js?v=0e3ada576039
  3. https://www.googletagmanager.com/gtag/js?id=G-WCZ03SZFCQ
DOM size
The DOM size is optimal.
The HTML file has 907 DOM nodes.
Security
HTTPS encryption
The webpage uses HTTPS encryption.
The HTML file has https://stackoverflow.com/ DOM nodes.
Mixed content
There are no mixed content resources on the webpage.
Server signature
The webpage does not have a public server signature.
Unsafe cross-origin links
The webpage does not have unsafe cross-origin links.
Plaintext email
The webpage contains plaintext emails.
  1. apple-touch-icon@2.png
Miscellaneous
Structured data
The webpage has structured data.
      Meta viewport
      The webpage has a meta viewport tag set.
      width=device-width, height=device-height, initial-scale=1.0, minimum-scale=1.0
      Character set
      The webpage does not have a charset declared.
      Sitemap
      The website has sitemaps.
      1. https://stackoverflow.com/sitemap.xml
      Social
      The webpage has 4 social links.
      Content length
      The webpage has 1,904 words.
      Text to HTML ratio
      The text to HTML ratio is under 10%
      The text to HTML ratio is 8%.
      Inline CSS
      The webpage contains inline CSS code.
      1. clip-path:url(#curve)
      2. left:8%
      3. right:8%
      4. background: linear-gradient(0deg, var(--orange-100) 30%, var(--white))
      5. background: linear-gradient(0deg, var(--blue-100) 30%, var(--white))
      6. color:inherit
      7. background-image:url(https://cdn.sstatic.net/Img/product/teams/illo-teams-pricing-shadow.svg)
      8. clip-path:url(#curve); transform: rotate(180deg)
      9. transform: rotate(-180deg)
      10. transform: scaleX(-1)
      Deprecated HTML
      There are no deprecated HTML tags on the webpage.