Atbash Cipher

Mirror the alphabet so A maps to Z, B to Y, and so on.

Alphabet mapping

Atbash mirrors the alphabet: A ↔ Z, B ↔ Y, C ↔ X, and so on. It has no key.

Type: Monoalphabetic substitution Key: None Direction: Same both ways A ↔ Z B ↔ Y M ↔ N

Options

Preserve case

Keep punctuation & numbers

Remove whitespace

Group letters

Atbash is self-inverse: encrypting and decrypting use the same letter mapping.

Output stats

Mode: Encrypt Operation: Same mapping either way Letters processed: 0 Input chars: 0 Output chars: 0 Blocks: 0

Classic example: plaintext ATTACK AT DAWN becomes ZGGZXP ZG WZDM. Because Atbash is self-inverse, applying it again returns the original text. When Group letters is on, output is converted to uppercase letters-only blocks.

Input

Output

Using This Tool: Guide & Notes Show guide

Atbash mirrors the alphabet so A becomes Z, B becomes Y, and the same rule decrypts the message again.

How to use it

Paste text into the input box.
Read the mirrored alphabet output.
Apply Atbash again to recover the original message.
Use Load example to see common Atbash fragments such as GSV for THE.

Options and settings

Preserve case keeps uppercase and lowercase styling.
Keep punctuation and numbers leaves unsupported characters unchanged.
Remove whitespace can create compact puzzle-style output.
Group letters formats the mirrored text into fixed-size blocks.

Notes

Atbash has no secret key, so anyone who recognises the pattern can reverse it.
It is best used for learning, demonstrations, and simple puzzles.

Atbash Cipher guide coming soon

The matching article is not published yet. This tool is ready now, and the guide can be added through the shared article template when it is written.

Guide coming soon

Signal acquired

A note from the team

We build these tools because we love cryptography, encoding, and making difficult ideas easier to explore. If they've helped you, even a small coffee means the world to the project. Thank you!

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