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JonDonym

Anonymization verification tool from the JonDonym project that checks IP, browser headers, cookies, and other identifiers for privacy leaks.

opsec
Official docs ↗

Platforms: Web · Last verified September 7, 2026

Anonymization verification tool from the JonDonym project that checks IP, browser headers, cookies, and other identifiers for privacy leaks.

Only use this tool against systems you own or are explicitly authorized to test — see the disclaimer.

Getting started

Best for: Comprehensive anonymization verification, browser privacy audit. See the official site linked above for details.