Caesar Cipher Decoder & Encoder
Caesar Cipher Decoder & Encoder Overview
Shift your text characters using the classic Caesar cipher method.
The Caesar Cipher is one of the oldest encryption techniques in history, named after Julius Caesar, who used it for secret military correspondence. It is a substitution cipher where each letter is shifted by a fixed number (the 'key'). For example, with a shift of 1, A becomes B. While easily crackable by modern standards, it is a fantastic tool for learning the basics of cryptography and creating simple puzzles or escape room clues.
How to Use Caesar Cipher Decoder & Encoder
- Enter your message in the input box.
- Choose a 'Shift' number (1-25) using the slider or input.
- The text encrypts instantly.
- To decrypt, you must know the shift number used.
- For decryption, shift 'backwards' or use the tool with the negative of the shift.
Frequently Asked Questions
- How do I crack it?
- Since there are only 25 possible shifts, you can just try them all (Brute Force) until the message makes sense.
- Does it encrypt numbers?
- Typically, no. The Caesar Cipher only shifts letters (A-Z). Numbers and punctuation usually remain unchanged.
Related Text Tools