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Text to Atbash cipher
Encode text with the Atbash cipher, free and online. Type a message and the alphabet is mirrored: A becomes Z, B becomes Y, and so on. Nothing is uploaded: your browser does the work.
How to use the Atbash cipher
- 1Paste or type the text into the box
- 2Read the result below, it appears as you type
- 3Copy the result with the copy button
- Your text with the alphabet mirrored.
What you get
- The alphabet, mirrored.A swaps with Z, B with Y, C with X, down to M and N.
- Result as you type.No button to press, the result changes with every keystroke.
- Nothing is uploaded.The conversion runs in your browser, the text stays on your device.
What you can do
- Encode a short message in one of the oldest known ciphers.
- Keep capitals as they are: upper and lower case letters are both mirrored.
- Decode an Atbash message with the same tool, because mirroring twice gives the original.
Good to know
- Atbash has no key, so anyone who knows the method can read it. It is a puzzle, not protection.
- Only the letters A to Z are changed. Digits, punctuation, spaces and letters such as ä or é stay as they are.
- There is no separate decode tool. Paste an Atbash message here to get the plain text back.
Questions
How does the Atbash cipher work?
The alphabet is reversed, so the first letter becomes the last: A is Z, B is Y and M is N.
How do I decode Atbash?
Paste the encoded message into this tool. The cipher undoes itself, so running it again gives the original text.
Where does the name come from?
Atbash comes from Hebrew, where the first letter (aleph) swaps with the last (tav) and the second (bet) with the one before it (shin).