Caniuse.com - SEO Checker

Sign up for free! PDF Export
Overview of the SEO Check
Meta information
100% 
Page quality
61% 
Page structure
79% 
Link structure
98% 
Server
72% 
External factors
100% 
SEO Score
Response time
1.00 s
File size
18.80 kB
Words
409
Media files
2
Number of links
21 internal / 25 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Can I use... Support tables for HTML5, CSS3, etc
The length of the page title is perfect. (444 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
"Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers.
The length of the meta description is perfect. (832 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
viewportwidth=device-width
Description"Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers.
keywordsweb browser compatibility support html css svg html5 css3 opera chrome firefox safari internet explorer
langen-us
charsetutf-8

Test up to 1.000 webpages of caniuse.com with our free plan!

Try For Free
No trial. It's just free!

Page quality

Content
(Critically important)
Some words from the page title are not used within the pages content
There are only 409 words on this page. Good pages should have about 800 words of useful content.
33.3% of the text are stop words.
The page contains a listing, which indicates a good text layout.
5 paragraphs were found on this page.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 15.78 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
A viewport "width=device-width" is provided.
At least one Apple touch icon is specified.
Bold and strong tags
(Somewhat important)
The following tag is repeated too often: settings panel
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://caniuse.com/img/browserstack.svgBrowserStack
/img/become_a_patron_button.pngBecome a Patron!

Page structure

H1 heading
(Critically important)
There is no H1 heading specified.
Headings
(Important)
The structure of headings is missing one or more levels. Do not skip heading levels.

Heading structure

Heading levelContent
H2 Legend
H3 Home
H3 Can I use...
H3 Support via Patreon
H3 Site links
H4 Latest features
H4 Most searched features
H4 Test a feature
H4 Did you know?
H4 Third party tools
H4 Browser scores
H4 Other support sites
Baselink: /
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 25 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://caniuse.com/Home
https://caniuse.com/ciu/newsNews
/ciu/comparisonCompare browsers
https://caniuse.com/ciu/aboutAbout
/wasm-bigint,wasm-bulk-memory,...April 7, 2024 - 8 new features
https://caniuse.com/Can I use
https://caniuse.com/ciu/indexIndex of features
https://caniuse.com/wasm-bigintWebAssembly BigInt to i64 conversion in JS API
https://caniuse.com/wasm-threadsWebAssembly Threads and Atomics
/wasm-multi-valueWebAssembly Multi-Value
/wasm-mutable-globalsWebAssembly Import/Export of Mutable Globals
/wasm-nontrapping-fptointWebAssembly Non-trapping float-to-int Conversion
https://caniuse.com/webpWebP image format
https://caniuse.com/flexboxFlexbox
https://caniuse.com/flexbox-gapgap property for Flexbox
https://caniuse.com/css-gridCSS Grid
https://caniuse.com/webglWebGL
https://www.browserstack.com/?...External Subdomain BrowserStack
https://live.browserstack.com/External Subdomain Anchor IE 11
https://live.browserstack.com/External Subdomain Anchor Safari 17
https://live.browserstack.com/External Subdomain Anchor Safari on iPhone 14
https://live.browserstack.com/External Subdomain Anchor Chrome on Galaxy S23
https://github.com/fyrd/canius...External vote to have it included
https://github.com/Fyrd/canius...External Anchor submit it yourself
https://caniuse.bitsofco.de/External Subdomain The CanIUse Embed — Add support tables to your site
https://github.com/una/caniuse...External Caniuse Component — Add support tables to your presentations
https://github.com/sgentle/can...External Caniuse command line tool
https://github.com/anandthakke...External Doiuse...? — Lint your CSS to check what features work
http://iwanttouse.com/External I want to use — Select multiple features and see what % of users can use them
https://github.com/Fyrd/canius...External See full list
https://caniemail.com/External Can I email... — Support tables for HTML & CSS in emails
https://a11ysupport.io/External Accessibility Support — Support information for web accessibility features in assistive technologies
https://caniwebview.com/External Can I Webview — Documentation for WebView capabilities, limitations & features
https://front-end.social/@fyrdExternal @Fyrd
https://mastodon.world/@lenscoExternal @Lensco
https://github.com/Fyrd/canius...External community
http://gs.statcounter.com/External Subdomain StatCounter GlobalStats
https://ipinfo.io/External ipinfo.io
https://www.browserstack.com/?...New window External Subdomain Text duplicate IMG-ALT BrowserStack
https://www.patreon.com/join/c...External Subdomain IMG-ALT Become a Patron!
http://www.patreon.com/oauth2/...External Subdomain Log in
https://caniuse.com/Text duplicate Home
https://caniuse.com/ciu/indexFeature index
https://caniuse.com/usage-tableBrowser usage table
https://caniuse.com/issue-listFeature suggestion list
https://github.com/fyrd/caniuseExternal Caniuse data on GitHub

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://caniuse.com/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
This page uses GZip for compressed data transmission.
Performance
(Somewhat important)
The page response time of 1.00 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 (19 kB).

HTTP Response Header

NameValue
pragmacache
strict-transport-securitymax-age=63072000; preload
varyAccept-Encoding
content-encodinggzip
content-length5412
content-typetext/html; charset=UTF-8
dateMon, 23 Sep 2024 13:43:17 GMT
serverApache
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 61,711 referring domains.
This page has 3,426,724 backlinks.
This page has backlinks from 31,586 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

No valid Robots.txt file was found.

Similar sites

Search preview

caniuse.com
Can I use... Support tables for HTML5, CSS3, etc
"Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers.

Most important keywords

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

KeywordResultRecheck
support66%Check
support tables63%Check
Browser support tables60%Check
tables58%Check
browser54%Check
Add support tables54%Check
browsers50%Check
CanIUse46%Check
technologies46%Check
Web Technologies46%Check
Show more keywords and terms

Test up to 1.000 webpages of caniuse.com with our free plan!

Try For Free
No trial. It's just free!

Cookie Policy

We use cookies to make our site work and also for analytics and advertising purposes. You can enable or disable optional cookies as desired. See the following links for more information.

Contact | Privacy

We need these so the site can function properly

So we can better understand how visitors use our website

So we can serve you tailored ads and promotions