Encode and decode text with the Atbash cipher, which mirrors the alphabet. Runs entirely in your browser.
Atbash is an ancient substitution cipher originally used for the Hebrew alphabet. It maps the first letter to the last, the second to the second-last, and so on, so A becomes Z and B becomes Y. This tool applies Atbash to any text. Because the mapping is symmetric, the same operation both encodes and decodes.
Input:
Hello
Output:
Svool
Why is there only one button?
Atbash is self-inverse: encoding and decoding are the same operation, so one transform handles both.
Is Atbash secure?
No. It is a fixed substitution with no key, so it is only useful for puzzles and history.
Does it change numbers or symbols?
No. Only letters are mirrored; everything else is preserved.
Does my text leave the browser?
No. It is processed locally in your browser.
Encode and decode text with the Atbash cipher, mirroring the alphabet (A becomes Z). Runs entirely in your browser.
Supported Tools: