Canvas fingerprint spoof
Pixel-noise on toDataURL / toBlob / getImageData. Free.
Browser fingerprint protection
One-click protection against browser fingerprint tracking.
Browser Leaks Fingerprint Shield spoofs canvas, WebGL, audio, plugins, and WebRTC out of the box — free for everyone. Pro tier adds Sec-CH-UA and User-Agent HTTP-header rewriting for full identity coherence.
Free download. Works in Chrome, Edge, Brave, Arc, Opera, Vivaldi.
About
What Fingerprint Shield does.
Browser Leaks Fingerprint Shield is a Chrome extension that protects your browser from fingerprint tracking. Modern trackers no longer rely on cookies — they read 30+ technical signals from your browser (canvas pixel hash, GPU vendor + renderer, audio fingerprint, font list, WebRTC IP candidates, Sec-CH-UA HTTP headers) and combine them into a unique browser fingerprint that follows you across sites, even in incognito and behind a VPN. The extension spoofs each fingerprint surface with platform-coherent fake values: pick Windows, macOS, or Linux and every probe returns matching strings. The free tier covers canvas, plugins, WebRTC IP-leak protection, and screen geometry — recognizable wins with low breakage risk. The Pro tier adds the deeper spoofs that need a coherent JS-side and HTTP-side identity: navigator.userAgent, Sec-CH-UA-Platform, Sec-CH-UA-Arch, audio jitter, WebGL renderer, and Intl.DateTimeFormat timezone consistency. Three security presets — Compatibility / Balanced / Strict — let you pick a protection level without reading docs. A pause-on-this-site button handles the rare case where a site refuses to work with spoofed identity. Captcha widgets (Cloudflare Turnstile, reCAPTCHA, hCaptcha) are automatically excluded from spoofing so verification still works.
Features
Everything in Fingerprint Shield.
WebGL GPU spoof
Fake vendor + renderer that match your chosen platform. Pro.
Audio fingerprint defense
Sparse multiplicative jitter on AudioBuffer.getChannelData. Pro.
WebRTC IP-leak protection
Smart wrapper blocks default-config tracker probes, keeps Discord / Meet / Zoom working. Free.
Sec-CH-UA HTTP rewriting
declarativeNetRequest rewrites every Sec-CH-UA-* header to match the JS spoof. Pro.
3 security presets
Compatibility / Balanced / Strict. Tuned from real-world bot-detection testing.
Native masquerading
Function.prototype.toString patched so spoofed methods return native-code strings. Defeats the standard 1-line detection.
Pause-on-this-site
One-click whitelist for sites that refuse to work with spoofing. Reload-to-apply.
Captcha-aware
Cloudflare Turnstile, reCAPTCHA, hCaptcha frames automatically excluded from spoofing.
FAQ
Fingerprint Shield — questions
How is this different from other fingerprint blockers?
Most fingerprint extensions only patch JavaScript APIs. Modern trackers also read Sec-CH-UA HTTP request headers, and any extension that lies in JS but not in HTTP is detectable instantly. Browser Leaks Fingerprint Shield rewrites both via declarativeNetRequest, and disguises every patched method to return native-code strings via Function.prototype.toString — defeating the standard 1-line detection.
Will it break websites?
The free tier (screen, canvas, plugins, WebRTC) is tuned for zero breakage. The Strict preset adds Sec-CH-UA and User-Agent rewriting, which can occasionally trigger captchas on heavily bot-protected sites — the one-click "Pause on this site" button is the escape hatch.
Does it work on browserleaks.com?
Partially. browserleaks.com runs some of its tests inside Web Workers, and Chrome MV3 extensions cannot inject into Web Workers — that's a platform limitation. Most tests still show spoofed values, but worker-based ones leak the real fingerprint.
Is the API key required?
No. The free tier (screen / canvas / plugins / WebRTC) works without any sign-up. The API key only unlocks Pro features — get one free at sessionat.com/register.
How do I test if it works?
Visit sessionat.com/fingerprint after installing — the page detects the extension via a hostname-gated handshake and shows your spoofed fingerprint hash with a green "Shield active" badge.
Add Fingerprint Shield to Chrome.
Free. Works in any Chromium browser. No card required.
Install Free →