A live probe of what your current browser and OS actually expose to a web page — graphics, compute, media, storage, and hardware APIs. Everything is detected in-page; nothing is sent to a server.
Results reflect what this specific browser build reveals to a web page — often less than the OS can do. Browsers may hide capabilities behind flags, insecure-origin restrictions, or user permissions. A "no" here can mean unsupported, disabled, or gated behind a prompt that hasn't been triggered yet.