GlassBox - What your browser reveals to every site you visit

Show HN: GlassBox – what the browser reveals, and how identifiable you are

GlassBox - What your browser reveals to every site you visit

GlassBox is a diagnostic mirror that runs 31 fingerprinting and device-enumeration techniques to show you exactly what your browser exposes to websites. It rates each signal's identifying power, from high-signal canvas and WebGL fingerprints to medium and low signals like timezone, fonts, and network info. The tool computes an identifiability percentage based on published entropy, helping you understand how uniquely trackable you are. It also simulates third-party tracking pixels to reveal what Facebook and Google Analytics see. Perfect for privacy-conscious users, developers, and researchers, GlassBox is a companion to CodeCanary and is open-source on GitHub.

Individually, most signals are weak; combined, they routinely single out one browser in millions. That combination is the whole game.

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2026-08-24