Atbash Cipher
Encode text with the reversed-alphabet Atbash cipher.
Quick answer: enter your details below and click Encode — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
A
Text & Writing
Enter your details below.
How to use
- Type or paste your message into the box.
- Click Encode.
- Copy the encoded message.
About this tool
Atbash Cipher swaps each letter for its mirror image in the alphabet: A becomes Z, B becomes Y, and so on. Because the swap is its own reverse, encoding a message twice returns the original text.
Frequently asked questions
How do I decode an Atbash message?
Run it through the tool again. Atbash is symmetric, so encoding the encoded message returns the original.
Does it change numbers and punctuation?
No. Only letters are swapped; numbers, spaces, and punctuation pass through unchanged.