Browser fingerprint test

Sites can build a 'fingerprint' from your browser's characteristics to recognize you without cookies. Here's what yours exposes.

Your browser exposes all of this without cookies:
Approximate fingerprint hash: …

How to use the browser fingerprint test

  1. Open the page — your browser traits are read automatically.
  2. Review what's exposed and the resulting fingerprint hash.
  3. Harden your browser (or use Tor Browser) to reduce uniqueness.

What this means

Sites combine these traits into a "fingerprint" that can recognize you even after you clear cookies or switch to private browsing. The more unusual your combination, the more identifiable you are.

Does a VPN stop fingerprinting?

No. A VPN hides your IP address; it does nothing about these browser traits. Fingerprinting and IP hiding are separate problems — pair a VPN with an anti-fingerprinting browser (like Tor Browser or a hardened Firefox) if that's your threat model.

Code & API examples

Use this from the command line or your code.

Browser only (JS)
console.log(navigator.userAgent, screen.width + 'x' + screen.height, Intl.DateTimeFormat().resolvedOptions().timeZone);

See all endpoints at /api/tools/.

Frequently asked questions

A technique that combines dozens of browser and device traits (screen size, fonts, timezone, GPU, etc.) into an identifier that can track you even with cookies cleared.

No — a VPN hides your IP, not your browser traits. Fingerprinting and IP hiding are separate problems; use anti-fingerprinting tools alongside a VPN.
Related tools
VPN timezone leak test WebRTC leak test Is my VPN working?
Want to hide your IP for real?

vpn.golf is a no-logs WireGuard VPN. Pick a hole, take the shot.

Step up to the tee — free