Browser Fingerprint Viewer
Any of these signals is harmless alone; combined, they often identify your browser uniquely. This page only displays them; nothing is stored or sent anywhere.
How it works
仕組みEvery page you visit can silently read a surprising amount about your setup, with no permission prompt and no cookie banner. This viewer shows exactly what your browser hands over: user agent, languages, screen geometry, pixel ratio, CPU threads, memory class, timezone, touch capability, and a canvas-rendering digest that varies subtly between machines. Each signal looks harmless; stitched together they often form a fingerprint unique enough to recognise your browser across sites without any cookie at all. The readout is generated live from your own device, displayed once, and never stored or sent anywhere.
The tool draws the same text and shapes on an invisible canvas and hashes the resulting pixels. Font rendering, antialiasing, and GPU quirks differ slightly between machines, so the pixels differ too, and with them the hash. Trackers use exactly this trick because the digest is stable for your device but different from your neighbour’s.
Mostly no. Private windows skip history and long-lived cookies, but the fingerprint signals (screen size, hardware, canvas output) read the same, so a fingerprinting script can still recognise the browser. What helps more: Firefox and Safari deliberately blunt some values, Tor Browser standardises them, and extensions can add noise to canvas reads.
DNT was an honour-system header that most sites ignored, so browsers have quietly retired it: Chrome hides it by default and Firefox removed the setting entirely. Ironically, enabling it made you slightly more fingerprintable, since it added one more uncommon signal. Its successor, Global Privacy Control, has real legal weight in some regions.