Classical Cipher Generator
Experiment with historical ciphers. Shift values are normalized, keys are validated, and non-Latin characters pass through unchanged.
Cipher settings
Educational For learning and puzzles only.
Caesar, ROT13, Atbash, and Vigenère are historical ciphers. They are not secure for protecting real secrets.
Everything runs locally in this tab, and non-Latin characters pass through unchanged.
Caesar shifts every letter by a fixed amount. Vigenère repeats a keyword for each letter. Only A–Z letters are transformed; spaces, digits, and punctuation are preserved.
About Classical Cipher Generator
Encrypt and decrypt with Caesar, Vigenère, Atbash, and ROT13 ciphers.
This tool runs locally in your browser. It does not upload your input, require an account, or store your data on a server. If a feature needs a network request, the interface asks before sending anything.