Secret Message / Cipher Generator
Encode or decode a message with a Caesar cipher. Two clear sections (Encode and Decode). Shift 1–25. Letters only.
Use Encode to turn your message into a shifted message, then copy the result. Use Decode to paste an encoded message and the same shift number to get the original back. Only letters (a–z, A–Z) are shifted; spaces and punctuation stay. Share the shift number with the recipient so they can decode.
How the Caesar cipher works
The Caesar cipher shifts each letter by a fixed number (1–25). For example, with shift 3, A becomes D and Z becomes C. It is a classic teaching tool and not secure for real secrecy—use it for fun or puzzles. For stronger privacy, use a proper password generator and encryption tools.