Measure cryptographic randomness, Shannon entropy (0-8 bits/byte), Chi-square test, and byte distributions.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Shannon entropy measures the average information density or uncertainty in a message. For bytes, it ranges from 0.0 (completely predictable, like repeated zeros) to 8.0 (completely uniform, like strong encryption or compression).
Both encrypted and compressed data have high entropy (> 7.5 bits/byte). However, encrypted data displays an extremely flat, uniform 256-byte distribution with Chi-square probability near 50%, whereas compressed archives retain subtle file header signatures.
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