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Cipher Tools

Encrypt and decrypt text with Caesar, Vigenère, ROT13, and Atbash classical ciphers — with live alphabet preview

Caesar Cipher

Shifts each letter by a fixed number of positions in the alphabet

+3

Substitution preview

Plain:ABCDEFGHIJKLMNOPQRSTUVWXYZ
Cipher:DEFGHIJKLMNOPQRSTUVWXYZABC

About classical ciphers

These are educational/recreational ciphers — they offer no real security and can be broken in seconds with frequency analysis or brute force. Use them for puzzles, escape rooms, or learning cryptography. For real security, use modern AES or other authenticated encryption.

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