How identifiable is my browser?
See how identifiable your browser is from the signals it leaks, with an entropy estimate. Runs entirely in your browser, nothing uploaded.
How identifiable your browser looks, based on the signals it leaks, is estimated above. A browser fingerprint is the combination of many small facts (your user agent, screen size, timezone, language, fonts, WebGL renderer and more) that together can single out your browser even without cookies. Individually each fact is common; combined, they can be startlingly unique.
This page pulls together the same signals a real fingerprinting script would and gives you a plain-language read on your distinctiveness, along with a rough entropy figure. Higher entropy means fewer people share your exact combination, which means you are easier to recognise across sites. It is an estimate for education, not a claim of perfect accuracy.
Fingerprinting matters because it works without your consent and survives clearing cookies and using private mode. Understanding which of your signals stand out is the first step to reducing them, which is exactly what the per-property pages here help you do.
What you should know
Why sites collect it
Advertisers, analytics firms and anti-fraud systems build fingerprints to recognise returning devices without cookies, link sessions, and detect bots or account abuse. The same technique serves both tracking and legitimate security.
Privacy implications
Fingerprinting is one of the hardest forms of tracking to escape because it needs no storage on your device and ignores your cookie choices. The counter-intuitive defence is sameness: the more your browser looks exactly like everyone else's, the harder you are to single out, which is the strategy privacy browsers pursue.
How to change or hide it
Reduce your fingerprint by using a browser with built-in anti-fingerprinting (Tor Browser aims to make users look identical; Brave and Firefox add protections), keeping a mainstream, updated setup so you match the crowd, and limiting unusual extensions and fonts. Paradoxically, a heavily customised browser can be easier to fingerprint, not harder.
Frequently asked questions
Can fingerprinting track me without cookies?
Yes. That is the point of it. Fingerprinting recognises your device from its signals, so it survives clearing cookies and using private browsing.
How do I make my browser less unique?
Use an anti-fingerprinting browser, keep a mainstream and updated configuration so you blend in, and avoid rare fonts and extensions. Looking common is the goal.
Is a lower entropy score better?
For privacy, yes. Lower entropy means more people share your combination of signals, so you are harder to single out. Higher entropy means you stand out more.