Browser & device info

What your browser reveals about you

Every time you visit a website, your browser shares technical details so pages can render correctly: your operating system, screen size, language preferences, time zone, the number of CPU cores, and the graphics hardware used to draw the page. Individually these values seem harmless, but combined they form a 'fingerprint' that can identify your device even without cookies.

This page reads those values locally in your browser and displays them back to you. Nothing is sent to our servers — it is the same information any site you visit can collect silently in the background.

Why it matters

Understanding your browser fingerprint helps you judge how identifiable you are online. If privacy matters to you, browsers like Firefox and the Tor Browser actively reduce the uniqueness of these values, and disabling unnecessary extensions lowers your exposure. Reviewing this data is the first step to understanding what trackers see.