Browser/CSS/JS Compatibility Checker

Search a curated list of ~45 common CSS properties and JavaScript/Web APIs (Flexbox, Grid, :has(), Container Queries, Fetch, WebSockets, IndexedDB, and more) and see which currently-relevant Chrome/Firefox/Safari/Edge versions support them, using real support data bundled from caniuse-lite and browserslist's own "last 5 versions" browser lists.

Search for a CSS property or JavaScript/Web API below to see which browser versions support it, using real support data bundled from caniuse-lite. "Currently relevant" versions for each browser are picked by browserslist (last 5 versions), so this won't show ancient browser releases.
Search or pick a CSS property or JavaScript API above to see its browser support.

Support data is a snapshot bundled from the caniuse-lite npm package at build time — it is not fetched live from caniuse.com, so it reflects that package version's data, not necessarily this exact minute. "Latest" versions come from browserslist's own current browser list, not a hardcoded version number.

Browser/CSS/JS Compatibility Checker

Search a curated list of ~45 common CSS properties and JavaScript/Web APIs (Flexbox, Grid, :has(), Container Queries, Fetch, WebSockets, IndexedDB, and more) and see which currently-relevant Chrome/Firefox/Safari/Edge versions support them, using real support data bundled from caniuse-lite and browserslist's own "last 5 versions" browser lists.

Common uses

  • Check which browsers support the :has() selector
  • See when Container Queries became supported
  • Check Fetch API browser support
  • Compare CSS Grid support across current browser versions

Frequently asked questions

Can I use Browser/CSS/JS Compatibility Checker to check which browsers support the :has() selector?

Yes. Browser/CSS/JS Compatibility Checker can check which browsers support the :has() selector, directly in your browser.

Can I use Browser/CSS/JS Compatibility Checker to see when Container Queries became supported?

Yes. Browser/CSS/JS Compatibility Checker can see when Container Queries became supported, directly in your browser.

Can I use Browser/CSS/JS Compatibility Checker to check Fetch API browser support?

Yes. Browser/CSS/JS Compatibility Checker can check Fetch API browser support, directly in your browser.

Is my data uploaded to a server?

No. This tool runs entirely in your browser — your input is processed locally on your device and is never uploaded or stored on a server.