What is browser fingerprinting?

Small browser details can add up.

Websites can read details such as your language, screen size and browser capabilities. Combining several details can help distinguish one browser from another. This is called browser fingerprinting.

What websites can detect

Common signals include screen characteristics, timezone, preferred languages, reported hardware information and graphics capabilities. Some websites also compare how text, images or audio are rendered.

Browsers can reduce, round or block these signals. A result marked “Not available” means this check could not read it; it does not describe every method another website might try.

What this does not reveal

These details do not automatically reveal your name or uniquely identify you. Their usefulness depends on the combination of signals and other information a website already has.

What this test does

This tool shows capability availability and ordinary browser details. It does not create a fingerprint ID, read rendered canvas pixels, generate an audio fingerprint or save these signals.

Understand your browser’s controls

Browsers may offer tracking protection and controls for website data. Their behavior differs. This test reports what is visible here; it does not measure the effectiveness of every privacy protection.