About Browser Fingerprint Test

Collects and scores your browser’s fingerprint by probing over a dozen client-side signals: user agent, language, platform, screen resolution, color depth, pixel ratio, hardware concurrency, timezone, cookie and localStorage support, Do Not Track, canvas fingerprint (renders shapes and text, then hashes the pixel data), WebGL renderer and vendor strings, installed font detection (tests 14 fonts via canvas width measurement against a baseline), and WebRTC availability. A weighted scoring algorithm rates how unique your fingerprint is.

• Canvas fingerprinting draws specific shapes and text onto an invisible canvas, then extracts the last 50 characters of the toDataURL() output as a fingerprint—rendering differences between GPUs and OS font rasterizers produce unique values
• Font detection tests 14 fonts (Arial, Courier New, Georgia, Times New Roman, Verdana, Comic Sans MS, Impact, and others) by measuring text width on a canvas and comparing against a monospace baseline
• WebGL fingerprinting reads the UNMASKED_RENDERER and UNMASKED_VENDOR strings from the debug extension, which identify your exact GPU model
• Uniqueness scoring weights: canvas (25 points), WebGL (20), fonts (15 + 1 per detected font up to 25 total), hardware concurrency (10), Do Not Track (5)
• All data collection runs locally in the browser—nothing is sent to any server

Frequently Asked Questions

Can I prevent browser fingerprinting?

Partially. Firefox’s Enhanced Tracking Protection and Brave’s fingerprint randomization add noise to canvas and WebGL results. But completely preventing fingerprinting is nearly impossible without making your browser so unusual that the countermeasures themselves become a fingerprint. Tor Browser is the most effective option because all users share an identical fingerprint.

Is this the same technique advertisers use?

Yes, the same signals. Commercial fingerprinting libraries like FingerprintJS collect these attributes (and more—audio context, WebGL rendering hashes, battery status on older browsers) to build a persistent identifier that survives cookie deletion. This tool shows you exactly what they can see.