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Caesar Cipher

Encrypt, decrypt, and brute-force fixed-shift substitution messages.

Classical Ciphers
Input

Caesar Cipher

Encrypt, decrypt, or brute-force a fixed-shift substitution cipher with a single workspace.

  • Brute force is useful when the shift is unknown.
  • Non-letter characters are preserved automatically.
  • Use small shifts when you want to compare output by eye.
Status
Waiting for input
Output

Caesar result

Review the transformed text and copy the output you want to keep.

Output preview

The encoded text, decoded text, or brute-force candidate list will appear here.