Caesar Cipher Encoder Decoder
Learning how ciphers work or sending a playful secret note? Type your text and shift every letter by a custom number of places to encode it — or shift back to decode a message someone sent you.
How to use
- Type or paste your text.
- Choose the shift key with the slider.
- Click Encode to shift forward or Decode to shift back, then copy the result.
Only A to Z letters are shifted, with wrap-around. Numbers, spaces and punctuation pass through unchanged, and letter case is preserved.