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 shift letters by a number (1–25), or Decode to reverse the process. Spaces and punctuation stay unchanged—only A–Z letters shift. Share the shift with your friend so they can decode.

How to use this tool

  1. Pick a shift value you both know.
  2. Encode a message and send the ciphertext.
  3. Recipient uses Decode with the same shift.

Tips

The Caesar cipher is a classic teaching toy—not secure against serious attackers. For real privacy use modern encryption and the password generator only for secrets, not ciphers.

Related pages

FAQ

Is this encryption?

It is a simple substitution—fine for puzzles, not for confidential data.

What about numbers or Unicode?

This page focuses on basic Latin letters—other characters are left as-is.

Can someone brute-force it?

Yes—only 25 shifts exist. Easy for computers.

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