Caesar Cipher
Encrypt and decrypt with the Caesar shift cipher — adjustable shift, plus show-all-25 brute force.
Runs locally in your browser. Your input is not uploaded.
How to Use
- 1
Type your message
Letters shift; numbers and punctuation pass through.
- 2
Set mode and shift
Encrypt, decrypt, or brute-force all 25 shifts.
- 3
Copy the result
In brute-force mode, scan for the readable line.
Frequently Asked Questions
- Each letter shifts a fixed number of places down the alphabet — with shift 3, A becomes D. Julius Caesar reportedly used shift 3 for military messages.
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