Tool for encoding and decoding with the Caesar cipher, a simple and famous shift cipher that replaces each letter with another one further down the alphabet. Compatible with ROT13 and other variants.

Method in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet. The method is named after Julius Caesar, who used it in his private correspondence.

History and usage The Caesar cipher is named for Julius Caesar, who used an alphabet where decrypting would shift three letters to the right.

The Caesar cipher, also known as a shift cipher, Caesar's code, or Caesar shift is one of the oldest and most famous ciphers in history, and while deceptively simple it has been used for important secrets …

It supports all standard caesar shift cipher functions, from basic rotation to more advanced keyed variations. Use our Caesar cipher encoder to convert messages into cipher text or test every …

The Caesar Shift Cipher is a simple substitution cipher where the ciphertext alphabet is shifted a given number of spaces. It was used by Julius Caesar to encrypt messages with a shift of 3.

Encrypt or decode text with a Caesar Cipher. Just set the shift, enter your text, and get instant results. Simple, fast, and smooth.