GlassBox
See every signal a website can read from your browser
GlassBox is a browser-based diagnostic mirror that runs every measurement a website can read from your browser — the same class of signals tracking and anti-fraud scripts collect — and shows them back to you live, instead of hidden. Everything runs client-side in your browser with no analytics and no beacon; nothing is sent anywhere. The one exception is IP intelligence, which queries public geolocation APIs (ipwho.is, ipapi.is) for your address, network, and VPN status, and can be switched off to stay fully local.
Use Cases
- Privacy-conscious users measuring how identifiable their browser is
- Security researchers demonstrating the fingerprinting signals sites collect
- Developers inspecting which hardware, engine, and session values their browser exposes
- Users comparing themselves across browsers or sessions to see if they can be re-linked
- Anyone evaluating their fingerprint against EFF Cover Your Tracks or amiunique.org
- Anti-fraud and tracking researchers understanding cross-browser linking techniques
