Radix UI
Radix UI is a React-based user interface component library that offers accessible, responsive, and customisable components for building web applications.
What detecting Radix UI tells you about a site
Radix UI is a headless React component library — it ships behaviour and accessibility, not styling — so it is invisible in headers and only shows up in the rendered DOM. The signature is its data attributes: data-radix-* hooks, data-state="open"/"closed" on toggles, and data-orientation / data-side on popovers, dialogs and menus. Detecting it tells you a React team that took accessibility and keyboard interaction seriously and chose to own its own visual design on top of a correct, unstyled primitive layer rather than adopt a pre-styled component kit.
Radix UI in a real-world stack
When you find Radix UI, it rarely travels alone. Almost always React with Tailwind CSS for styling, and very frequently surfaced through shadcn/ui, which is built on Radix primitives.
About
Radix UI is a React-based user interface component library that offers accessible, responsive, and customisable components for building web applications.
Categories: UI frameworks
Quick facts
How we detect Radix UI
Sourcemap Explorer carries 1 fingerprint signal for Radix UI, spread across 1 channel — dom selector. The exact patterns are listed below, and you can replay each one in Chrome DevTools to confirm a match by hand.
Each signal alone is rarely conclusive — Sourcemap Explorer cross-references all of them and weights by confidence. You can reproduce any of these checks yourself in Chrome DevTools.
A DOM selector that only this technology's pages render. Verified at runtime by the content script.
a[data-radix-collection-item], button[data-radix-collection-item]
Requires
Radix UI only counts as detected when these are also present.
FAQ
How do I check if a website is using Radix UI?
Open the page in Chrome, click the Sourcemap Explorer toolbar icon, and read the Stack tab. Radix UI's specific fingerprints here are dom selector, and the popup flags Radix UI whenever any combination of them is found. The same checks can be reproduced manually in DevTools — see the "How we detect" section above.
What Radix UI version can Sourcemap Explorer detect?
Radix UI ships as a hosted ui frameworks rather than a bundled npm package, so version-specific detection isn't always possible. Where the platform leaks a version in response headers (`X-Powered-By`, `Server`, generator meta tags) we surface it; otherwise we report presence only.
Is Radix UI open source?
Yes, Radix UI is open source. The license details are listed on the official site (https://www.radix-ui.com), and the codebase typically lives on a public source-control host.
Where can I read more about Radix UI?
Official site: https://www.radix-ui.com. For Sourcemap Explorer's detection guide, see the deep-dive link below or the related guides in the cross-link section.
Detected by Sourcemap Explorer
Open the popup on any page running Radix UIand you'll see the exact version pulled from the bundled package.json when sourcemaps are exposed.