The tool is 100% client-side. It reads standard browser APIs — navigator (user agent, languages, hardware, cookies, Do-Not-Track, online status), navigator.userAgentData on Chromium browsers, window.screen, Intl for timezone and locale, and feature detection — entirely in your browser. It makes zero network requests, so nothing is uploaded, logged or stored, there is no server and no account, and we never see your details. Because of that it also cannot show your IP address or IP-based location: those exist only on the network and require contacting a server to look up, which this tool deliberately never does. Any website you visit can read these same browser signals, so the tool simply shows you what your browser already reveals — minus the IP.

Detection parses the navigator.userAgent string, which is only an advisory label: extensions, developer tools and privacy settings can change (spoof) it, and modern browsers intentionally freeze or simplify it — a policy called user-agent reduction — to limit fingerprinting, so the reported version or operating system can be approximate or generic. To improve accuracy the tool prefers navigator.userAgentData (User-Agent Client Hints) when the browser exposes it, because those structured values are harder to spoof and can include the precise platform version and CPU architecture. Client hints are Chromium-only, however — Firefox and Safari do not implement them — so on those browsers detection falls back to user-agent parsing. The tool tells you which source it used.

navigator.userAgentData is the User-Agent Client Hints API. Instead of one long, easily-spoofed string, it provides discrete, structured fields: a list of browser brands and versions, the platform name, and whether the device is mobile, all available with low entropy by default. Higher-entropy details — the full platform version (useful for telling Windows 10 from Windows 11), CPU architecture and bitness, and the device model — are requested explicitly with getHighEntropyValues(), and the browser may withhold them for privacy. Because the values are structured and the browser controls what is shared, they are more reliable and harder to fake than parsing the raw user-agent. The catch is support: it is implemented only in Chromium-based browsers (Chrome, Edge, Opera, Samsung Internet, Brave), not Firefox or Safari, so it is used as an upgrade when present and the tool falls back to user-agent parsing otherwise.

The tool feature-detects a checklist of web platform capabilities using simple typeof / “in” checks and a throwaway WebGL canvas: JavaScript, cookies, localStorage and sessionStorage, IndexedDB, Service Workers, Web Workers, WebAssembly, WebGL and WebGL 2 (plus the GPU renderer string when exposed), WebRTC, WebSockets, the Geolocation API, Notifications, the Clipboard API, Web Share, Touch Events, Speech Synthesis, WebGPU and Intl — each shown as supported or not. Copy report assembles everything — browser, engine, OS, device, languages, timezone, CPU cores, memory, touch, cookies, Do-Not-Track, online status, screen and viewport, the full user-agent and the feature list — into a clean plain-text block on your clipboard, ideal for pasting into a bug report or a message to a support team. The Copy buttons only write to your own clipboard.