Free online Atbash cipher tool for encoding and decoding text using the ancient Hebrew substitution cipher. Educational, secure, and completely free.

Tool to decrypt/encrypt with Atbash (Mirror code), a substitution cipher replacing the first letter of the alphabet with the last, the second with the penultimate etc.

Originally used to encode the hebrew alphabet, Atbash (אתבש‎‎) is formed by mapping an alphabet to its reverse, so that the first letter becomes the last letter. The Atbash cipher can be seen as a special …

This is a complete guide to the Atbash cipher and the tool you need to decode it. From the very earliest days of encryption, people have been using the Atbash cipher to hide the meaning of their text.

Free online Atbash cipher encoder and decoder tool. Convert text using this ancient substitution cipher where each letter is replaced with its mirror position in the alphabet.

Learn how to encrypt and decrypt text using the Atbash Cipher, a simple yet powerful symmetric substitution cipher.

Free Atbash cipher encoder and decoder. One of the oldest substitution ciphers, used in ancient Hebrew texts. Perfect for learning classical cryptography and historical encryption methods.

Jan 7, 2026 · A very simplistic cipher where you change A to Z, B to Y, and so on. The Atbash cipher is a very common and simple cipher that simply encodes a message with the reverse of the alphabet. …

Free online Atbash cipher tool. Encode and decode text using the ancient Hebrew Atbash substitution cipher. Reverse alphabet encryption for messages and puzzles.

Free Atbash cipher tool. Encrypt and decrypt text using reverse-alphabet substitution (A↔Z, B↔Y). Learn this simple classical cipher instantly in your browser.