Discover Your Browser's Unique Fingerprint
A scientific browser fingerprinting tool with real entropy-bits scoring (not just a vague "rating"), live cohort comparison against today's visitors, defense-test mode that detects whether your anti-fingerprint extensions are actually working, and a unique visual fingerprint art generated from your hash. Free, instant.
How to test your browser fingerprint
The tool scans 8 vectors in your browser: Canvas, WebGL, Audio, Fonts, Hardware, Math, Timezone, and Features. Each is hashed with SHA-256.
Total bits of entropy is the scientific measure: under 8 bits = grade A (hard to track), 26+ bits = grade F (uniquely identifiable).
See live how many of today's visitors share your exact fingerprint. "1 of N" means you stand alone among today's scans.
If you have CanvasBlocker, Brave Shields, Firefox RFP, or Tor — click "Test my defenses" and we run scans twice to detect whether protection is actually randomizing output.
Save the current fingerprint locally; return later to see which vectors drifted. Fingerprints are not actually static — installing a font, updating a driver, even changing screen resolution moves the hash.
See how unique you are among today's visitors via Canvas, WebGL, audio and font vectors
Defense Test
What the A–F grade means
The grade combines two things: how many bits of identifying data the scan managed to collect, and how many collection channels your browser closed off. Closing a channel moves the grade more than shaving off a couple of bits.
| Grade | When you get it | What it means in practice |
|---|---|---|
| A | Four or more channels closed (two privacy signals count as one closed channel) | Your browser looks like many others of its kind — picking you out by fingerprint is hard. |
| B | Two or three channels closed, or under 18 bits with at least one closed | Protection is working, though part of the data still gets through. |
| C | Under 18 bits with no protection, or 18–26 bits with one channel closed | The fingerprint is blurred: enough browsers match yours for you not to stand out immediately. |
| D | 26–35 bits, no protection | The normal state of a default browser — a baseline, not a failure. |
| F | 36 bits or more, no protection | The combination of traits is rare enough to point at a single device. |
Reading the numbers
- A bit is a doubling: each additional bit halves the crowd of browsers that look like yours.
- Blocked and randomized channels are counted separately from bits — that is why a browser with fewer bits can still score lower than one with active protection.
- The scale is calibrated against our own scans: a browser with no extensions almost always lands in D, so D is the starting point rather than a verdict.
