# Browser Feature Detector Check which modern web APIs and CSS features your browser supports — from WebGPU and Service Workers to :has() and container queries. Search the list. Runs entirely in your browser. ### How it works Each feature is checked with a tiny test — looking for a property on `window` or `navigator`, or asking `CSS.supports()` whether a CSS feature is understood. This is exactly how progressive-enhancement code decides what to use. Results reflect *this* browser on *this* device and are computed locally. --- *Source: [ocxly.com/browser-features.html](https://ocxly.com/browser-features.html) — OCXLY, free 100% client-side privacy-first tools. Free browser feature detector. Check which modern web APIs and CSS features your browser supports — WebGPU, Service Workers, :has(), container queries and more. Runs entirely in your browser.*