Look up any web platform feature, from CSS Grid and :has() to fetch, dialog or WebP, and see at a glance which browser versions support it, which need a prefix or a flag, and what share of users worldwide can use it today. Data comes from the open Can I use database.
Last updated:
Loading the Can I use database…
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How to use the Browser Compatibility Checker
Type a feature such as grid, flexbox gap, :has, fetch, dialog, avif or service worker.
Narrow the type with the CSS, JavaScript and APIs, HTML or SVG filters if you get many matches.
Click a feature in the list (or press Check support to open the best match).
Read the summary: the first supported version per browser, global support and what your own browser does.
Check the notes for partial support and known issues, then copy the summary or share the page link.
Reading the support table
Marker
Meaning
What to do
Supported (green)
Works in that version range without changes
Use it normally
Partial (amber)
Incomplete or older implementation
Read the numbered note; test the parts you rely on
Not supported (red)
The feature is missing
Provide a fallback or a polyfill
Prefix needed (orange underline)
Only works with -webkit-, -moz- or similar
Add the prefixed version, or use a tool such as Autoprefixer
Behind a flag (striped)
Disabled by default, experimental
Treat as unsupported for real visitors
Current / Future
Outlined is today's release; dashed are upcoming versions
Plan ahead for features landing soon
Using new features safely
Progressive enhancement. Build a working baseline first, then add the new feature for browsers that support it.
CSS feature queries. Wrap new CSS in @supports (display: grid) { … } so older browsers simply skip it.
JavaScript feature detection. Check before you call: if ('IntersectionObserver' in window) { … } instead of sniffing the user agent.
Know your audience. Global support is an average; your analytics may show more older iPhones or corporate browsers than the world average.
Test on real devices. Support tables tell you what is implemented, not every bug; Safari on iOS in particular is worth checking on a phone.
Frequently asked questions
Where does the support data come from?
From Can I use (caniuse.com), the open compatibility database maintained by Alexis Deveria and contributors under the CC BY 4.0 license. The tool downloads the published database file from a public CDN and searches it in your browser. Global usage percentages are estimates based on StatCounter browser statistics.
What does partial support mean?
Partial support means the browser implements only part of the feature, an older version of the specification, or has significant limitations. The numbered notes below the table explain exactly what is missing for each browser version.
What do the prefix and flag markers mean?
A prefix marker means the feature only works with a vendor prefix such as -webkit- or -moz- in that version. A flag marker means it is implemented but disabled by default and must be switched on in the browser's experimental settings, so normal visitors cannot use it.
How is the global support percentage calculated?
It adds up the estimated share of all web users whose browser version fully supports the feature, plus the share with partial support. A feature at 95% or more is usually safe to use with a simple fallback for the rest.
Why are mobile browsers shown with only one version?
Can I use tracks only the current release for some mobile browsers, such as Chrome and Firefox for Android, because they update automatically and older versions have very little usage.
Is this the same as the browser feature checker?
No. The Browser Feature Checker tests what your own browser can do right now. This compatibility checker shows support across all major browsers and versions, which is what you need when deciding whether a feature is safe to use on a website.
How current is the data?
The page loads a specific published version of the Can I use database, and its update date is shown under the table. New browser releases appear after the database is updated, so check caniuse.com for features that changed in the last few weeks.
Are all the tools on FreeToolCabin tested for quality and accuracy?
Yes! Every tool on our site undergoes automated Q/A testing in real browser environments to ensure high precision, correct output, and zero errors. If you happen to spot a bug or have a suggestion, please contact us at [email protected] and our team will review it right away.