Browser Fingerprinting Test: What Your Browser Reveals About You

Every website you visit learns something about your device. Not through cookies—those you can delete. Not through login accounts—those you control. Through browser fingerprinting: a passive surveillance technique that reads your hardware, software, and configuration, then builds a unique signature.

Run our free fingerprint test now

The Mechanics

When your browser requests a webpage, it sends an HTTP request with a User-Agent string. That string includes your operating system, browser version, and device type. But the server doesn't stop there. Through JavaScript APIs, websites can query dozens more attributes:

  • Canvas rendering: Your GPU processes a hidden image slightly differently than every other GPU
  • WebGL fingerprints: Graphics driver versions, renderer strings, and shader capabilities
  • Audio processing: The Web Audio API generates an oscillator tone; your sound card's processing introduces subtle, measurable distortions
  • Installed fonts: Your system font list (often 200–400 entries) is queried
  • Screen metrics: Resolution, color depth, pixel ratio, and available screen real estate
  • Timezone and language: Less unique individually, but additive when combined

AmIUnique.org analyzed over 1.5 million fingerprints and found that 94.2% of users had a unique configuration.

What Our Test Reveals

Our browser fingerprinting test runs the same JavaScript queries that tracking companies use, but displays the results to you instead of logging them to a database.

After running the test, you'll see:

  1. Your fingerprint hash: A computed identifier based on combined attributes
  2. Per-attribute breakdown: Each data point shown individually
  3. Change detection: If you install a new font or update your browser, the fingerprint shifts
  4. Uniqueness score: How distinctive your browser is

Myths Debunked

"VPNs stop fingerprinting." False. VPNs change your IP address. Your browser fingerprint remains identical.

"Private browsing fixes this." False. Incognito mode blocks cookies and history locally. It does not alter your canvas rendering, font list, GPU, or screen resolution.

"Safari blocks all fingerprinting." Partially true. Safari has the strongest anti-fingerprinting measures, but users are still distinguishable through JavaScript engine timing and audio processing differences.

What Actually Works

Complete elimination is impossible without breaking the web. But reduction is achievable:

  1. Firefox with privacy.resistFingerprinting: Forces Firefox to report a standard, generic profile
  2. Brave's fingerprint randomization: Randomizes certain fingerprint attributes per session and per domain
  3. Tor Browser: Gold standard. All Tor Browser users report the same screen size, fonts, plugins, timezone
  4. Dedicated browser for sensitive activities: Use a fresh Firefox profile with privacy.resistFingerprinting enabled

Run our free browser fingerprinting test