Atbash encoding
text = HELLO WORLD
Result: SVOOL DLIOW
Atbash Cipher Demo
EDUCATIONAL DEMONSTRATION ONLY — The Atbash cipher is a monoalphabetic substitution that reverses the alphabet. It originates from Hebrew cryptography and is one of the oldest known ciphers. Like ROT13, it is its own inverse.
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Enter your values and press Calculate — the result appears here.
Worked examples
Frequently asked questions
What does "Atbash" mean?
Atbash is formed from the first and last Hebrew letters: Aleph-Tav-Bet-Shin. It represents the reversal of the alphabet.
Is Atbash secure?
No. It is a fixed substitution with no key. Like ROT13, it provides no security and is trivially broken.
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