Caesar Cipher

Caesar cipher with adjustable shift value

Encoding & Escaping

Options

Mode

Shift Amount: 3

Input

Output

About Caesar Cipher

• Classic Cipher: One of the oldest and simplest encryption techniques
• Shift Letters: Each letter is shifted by a fixed number of positions in the alphabet
• ROT13: Special case with shift of 13 (encoding and decoding are the same operation)
• Preserves Case: Uppercase and lowercase letters are handled separately
• Non-Letters Unchanged: Numbers, spaces, and punctuation remain as-is

The Caesar Cipher tool implements the classic encryption method used since ancient Rome, allowing you to shift letters by any number of positions you choose. Named after Julius Caesar, this substitution cipher is an excellent educational tool for learning how encryption works and understanding the history of cryptography. Adjust the shift value to encode and decode messages, making it perfect for educational purposes, code-breaking puzzles, and cryptography learning.