What every website already knows about you

● sheets.works / the data drop all drops ↗

reading your browser…

You gave this page no permission.
It already knows this much about you.

1 in —

browsers share your exact fingerprint.

An upper bound (— bits of entropy). Real-world uniqueness is lower because these signals correlate. Method after EFF's Cover Your Tracks.

your tracking sigil · save png

◉ None of this was sent anywhere. Every value below was computed inside your browser. Profiling you took zero network requests. Don't trust me, prove it: open DevTools → Network tab → reload. It stays empty.

0 signals read 0 bytes uploaded 0 cookies needed it's all in view-source

THE DOSSIER bar = how much each signal narrows you down →

Want to see something worse?

Everything above is anonymous fingerprinting. Your local network IP is a different kind of leak: browsers expose it through WebRTC, often even behind a VPN. This one does make a network request (a STUN lookup) — so it's opt-in.

Why each of these gives you away

A "fingerprint" doesn't need a cookie or a login. It's built from the dozens of tiny configuration details your browser hands over to every site, automatically, to render a page. Individually they're boring. Combined, they're close to unique — and they persist across incognito windows, across sessions, often across the VPN you turned on to stop exactly this.

Graphics cardYour exact GPU + driver, leaked verbatim by WebGL. One of the single most identifying bits on the web.
Canvas / AudioAsk the browser to draw text or generate a tone, then hash the result. Tiny hardware differences make your output reproducibly yours.
Installed fontsMeasured invisibly, no permission. The specific set you have installed is often the rarest thing about you.
Screen + hardwareResolution, pixel ratio, color depth, CPU cores, memory. Common values blend in; unusual ones light you up.
Timezone + languagesRough location and who you are, for free, before a single click.

The number up top is an upper bound. It sums the entropy of each signal as if they were independent, which they aren't (a 13-inch Retina screen already implies a lot about your GPU). Treat it as "at most this unique." The honest version of this measurement is EFF's Cover Your Tracks, which compares you against a live population; this page is a faster, local, show-don't-tell version of the same idea.

What can you do? Not much, cheaply. Fingerprinting resistance means looking like everyone else: Tor Browser, or Firefox with resistFingerprinting, both flatten many of these signals. Most "privacy" extensions add entropy and make you more trackable, not less.