Question 1

What is browser fingerprinting?

Accepted Answer

Browser fingerprinting identifies you by combining many small device traits — canvas and WebGL rendering, installed fonts, audio processing, screen metrics, and more — into a signature that is often unique. Unlike cookies, it works without storing anything on your device.

Question 2

How unique is my browser fingerprint?

Accepted Answer

Studies show most desktop browsers are unique among hundreds of thousands of devices. This test combines 18 signals, all computed client-side, to estimate how identifiable your configuration is.

Question 3

Can I prevent browser fingerprinting?

Accepted Answer

You can reduce it: Tor Browser makes every user look alike, Firefox offers resistFingerprinting, and Brave randomizes fingerprintable values. Be aware of the paradox — aggressive ad blockers and rare extensions can actually make your fingerprint more unique.

Question 4

Is browser fingerprinting legal?

Accepted Answer

In the EU, fingerprinting for tracking requires the same informed consent as cookies under the GDPR and ePrivacy rules. Enforcement is harder because fingerprinting leaves no trace on your device — which is exactly why advertisers use it.

Question 5

Does this test store my fingerprint?

Accepted Answer

No. All 18 signals are computed inside your browser and displayed only to you. Nothing is uploaded, stored, or compared against a database — zero logs, as everywhere on whatsmy.fyi.

What's My Fingerprint?

Frequently asked questions