Panopticlick
EFF browser fingerprinting test (now Cover Your Tracks at coveryourtracks.eff.org) that measures how uniquely identifiable your browser is across the…
Platforms: Web · Last verified September 7, 2026
EFF browser fingerprinting test (now Cover Your Tracks at coveryourtracks.eff.org) that measures how uniquely identifiable your browser is across the web.
Only use this tool against systems you own or are explicitly authorized to test — see the disclaimer.
Getting started
Best for: Measuring browser fingerprint uniqueness, testing tracker blocking effectiveness. See the official site linked above for details.