What Does Your Browser Reveal About You?
Every signal below is read and computed live in your own browser via JavaScript — none of it leaves your browser or is sent to our servers. It’s the same kind of fingerprint tracking scripts and anti-fraud systems use to identify a device across sessions, even without cookies.
A browser fingerprint is a combination of technical details your browser exposes to any page you visit — user agent, screen resolution, installed fonts, GPU rendering quirks, and more. Individually mundane, together they can narrow a device down to one in a million without ever setting a cookie.
This page runs the same probes locally, in your browser, and shows you the raw results below. Network-identity signals — your IP address, ASN, and VPN/proxy detection — live on the IP lookup page instead; this one is scoped to what your browser itself gives away.
Browser Overview
Proxy Detection Signals
Canvas Fingerprint
WebRTC
JavaScript Capabilities
Fonts
Why these signals matter for privacy
Basic properties — user agent, platform, language, screen size, timezone — are readable on almost every page you visit. Alone each is common, but combined they form a fingerprint precise enough to re-identify a returning visitor even in a private/incognito window.
The canvas and font tests above render invisible text and measure subtle GPU/font-rendering differences between devices — a technique used across the ad-tech and anti-fraud industry as a cookie-less alternative to track or verify a device.
The WebRTC check above opens a peer connection with no STUN/TURN server configured, so it only gathers local "host" ICE candidates — on a misconfigured VPN or proxy, this can still leak your real local IP address even while your browser's address bar shows a different one; by itself it cannot reveal a public IP.
Frequently asked questions
- What is a browser fingerprint?
- A browser fingerprint is a set of technical details — user agent, screen size, timezone, installed fonts, canvas/WebGL rendering quirks and more — that, combined, can identify a specific browser or device without using cookies.
- Does this page send my data anywhere?
- No signal shown on this page is sent to our servers — each one is read and computed locally in your browser via JavaScript. Like most pages, this one still loads a couple of small UI components (such as the sign-in dialog) from our server; none of the fingerprint data itself travels in those requests. Our separate IP lookup page does query your IP against our API — this page's fingerprint signals do not.
- Can a VPN protect me from browser fingerprinting?
- No — a VPN only changes your IP address and apparent location; browser fingerprinting instead reads details like fonts, screen size, canvas rendering and WebRTC leaks that a VPN does not touch. Some VPN/browser combinations also fail to prevent a WebRTC IP leak, as tested above.
- How can I reduce my browser fingerprint?
- Use a privacy-focused browser or extension that blocks canvas/font fingerprinting, disable WebRTC (or use a browser that scopes it to the VPN's IP), and keep common settings — default fonts, standard window size — rather than a heavily customized setup that stands out.