Brute-force all 256 single-byte XOR keys with automated English frequency & chi-squared scoring.
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.
Paste obfuscated hex, base64, or raw ciphertext string.
All 256 keys (0x00 to 0xFF) are tested with statistical frequency scoring.
Review top-ranked plaintext and copy the recovered key and message.
It scores plaintexts using a combination of English letter frequency correlation (ETAOIN SHRDLU), printable ASCII character ratio, and dictionary word matching.
Yes, you can toggle between Auto, Hex, Base64, and Raw UTF-8 string modes.
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