What does your browser reveal?

What is browser fingerprinting?

Every browser leaks a different combination of properties when it talks to a website — installed fonts, GPU model, screen size, audio processing quirks, supported features. Individually these signals are unremarkable, but combine fifteen or twenty of them and the result is usually unique to one device. That signature is your browser fingerprint.

Unlike cookies, fingerprinting needs no consent, no opt-in, and no opt-out. There's no checkbox in your browser settings labelled "stop fingerprinting me." Trackers gather the signals just by serving you HTML.

How is it different from cookies?

Cookies are a small text file the website asks the browser to store and return later. They're opt-out by design: you can clear them, block third-party ones, or browse in incognito mode and they don't follow you. Fingerprinting is the opposite — it's passive: the website observes properties your browser inherently exposes, no storage required. Clearing cookies has no effect. Incognito mode has only modest effect (the fingerprint is the same).

What can be done about it?

Several browsers fight back. Firefox 145+ normalizes screen, hardware concurrency, and timezone signals when Enhanced Tracking Protection is on. Brave "farbles" canvas and audio outputs — adds slight noise per session so the fingerprint is randomized rather than stable. Tor Browser returns blank canvas data and many other zeroed-out values. The cost is a small amount of website breakage, in exchange for being much harder to track across sites.

None of this stops your IP address from being visible, which is its own identity signal. Check if your IP is also exposed →

This page runs entirely in your browser. No fingerprint data is sent to our servers or stored anywhere — there is no API call to a backend for this tool. You can verify by opening DevTools / Network and watching this page load.