Socket.io - SEO Checker

Sign up for free! PDF Export
Overview of the SEO Check
Meta information
61% 
Page quality
48% 
Page structure
72% 
Link structure
65% 
Server
100% 
External factors
100% 
SEO Score
Response time
0.10 s
File size
63.10 kB
Words
204
Media files
140
Number of links
39 internal / 155 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Socket.IO
The page title is too short. (89 pixels of 580 max pixel length) Optimize title
The domain is used in the page's title.
There are no duplicate words in the title
Meta description
(Critically important)
The meta description is missing.
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
https://socket.io/
There is a valid canonical link specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Server location: United States of America
The following language is defined by HTML: en
Alternate/Hreflang Links
(Somewhat important)
The specified alternate links have no errors.
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
generatorDocusaurus v2.4.3
viewportwidth=device-width,initial-scale=1
docusaurus_localeen
docusaurus_tagdefault
docsearch:languageen
docsearch:docusaurus_tagdefault
langen
twitter:cardsummary_large_image
og:titleSocket.IO
og:urlhttps://socket.io/
charsetUTF-8

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Page quality

Content
(Critically important)
There are only 204 words on this page. Use at least 250 words to provide useful information.
Only 2 paragraph/s was/were found on this page.
19.6% of the text are stop words.
The page contains a listing, which indicates a good text layout.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 12.75 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
A viewport "width=device-width,initial-scale=1" is provided.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 6 tags for this page.
Image SEO
(Somewhat important)
Alt text (alternative text) is correctly used on all found images.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
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://socket.io/images/logo.svgSocket.IO logo
https://socket.io/images/logo-dark.svgSocket.IO logo
https://socket.io/images/logo.svgSocket.IO logo
https://socket.io/images/logo-dark.svgSocket.IO logo
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Page structure

H1 heading
(Critically important)
Socket.IO
The H1 heading is too short (9 characters). It should be at least 20 Characters long.
Headings
(Important)
The structure of headings is missing one or more levels. Do not skip heading levels.

Heading structure

Heading levelContent
H1 Socket.IO
H3 Performant
H3 Reliable
H3 Scalable
H3 Basic example
H3 Latest blog posts
H3 Our sponsors
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 (155) on this page.

Found links on this page

LinkAttributesAnchor text
https://socket.io/Anchor Skip to main content
/blog/npm-package-provenance/npm package provenance
https://socket.io/Socket.IO
IMG-ALT Socket.IO logo
https://socket.io/docs/v4/Guide
/docs/v4/tutorial/introductionTutorial
https://socket.io/get-started/Examples
/docs/v4/emit-cheatsheet/Emit cheatsheet
/docs/v4/server-api/Server API
/docs/v4/client-api/Client API
/docs/v4/troubleshooting-conne...Troubleshooting
https://stackoverflow.com/ques...New window External Stack Overflow
https://github.com/socketio/so...New window External GitHub Discussions
https://socketio-slackin.herok...New window External Subdomain Slack
https://socket.io/blogBlog
https://twitter.com/SocketIONew window External Twitter
https://cdn.socket.io/New window External Subdomain CDN
https://admin.socket.io/New window External Subdomain Admin UI
https://socket.io/docs/v4/faq/FAQ
/docs/v4/changelog/Changelog
https://github.com/orgs/socket...New window External Roadmap
https://opencollective.com/soc...New window External Become a sponsor
https://socket.io/docs/v4/4.x
https://socket.io/docs/v4/Text duplicate 4.x
https://socket.io/docs/v3/3.x
https://socket.io/docs/v2/2.x
/docs/v4/changelog/Text duplicate Changelog
https://socket.io/English
https://socket.io/fr/Français
https://socket.io/pt-br/Português (Brasil)
https://socket.io/zh-CN/中文（中国）
https://github.com/socketio/so...New window External No Text
/docs/v4/tutorial/introductionGet started
https://socket.io/docs/v4/Documentation
https://replit.com/@socketio/s...External Replit
https://stackblitz.com/edit/so...External StackBlitz
https://codesandbox.io/s/socke...External CodeSandbox
/blog/npm-package-provenance/Text duplicate npm package provenance
https://socket.io/blog/monorepo/Socket.IO monorepo
/blog/three-new-adapters/Three new adapters
/blog/chat-platform/Chat platform
https://socket.io/blog/rss.xmlRSS
https://socket.io/blog/atom.xmlatom
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Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://socket.io/"
HTTP header
(Important)
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 is excellent with 0.10 seconds.
The file size of the HTML document is fine (63 kB).

HTTP Response Header

NameValue
accept-rangesbytes
access-control-allow-origin*
age484612
cache-controlpublic, max-age=0, must-revalidate
content-dispositioninline
content-encodingbr
content-typetext/html; charset=utf-8
dateMon, 04 Aug 2025 01:12:53 GMT
etag"965d57ceb99625717ef87815a1f732d4"
last-modifiedMon, 28 Jul 2025 19:43:19 GMT
serverVercel
strict-transport-securitymax-age=63072000
x-vercel-cacheHIT
x-vercel-idfra1::n9tv4-1754269973425-7eef89a49fb3
content-length14483
statuscode200
http_versionHTTP/2

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