ATBASH — Free Online Converter
Reverses the alphabet: A<->Z, B<->Y... (apply twice to undo). Type or paste your text in the tool below to convert it instantly.
| Input | Output |
|---|---|
Hello World | Svool Dliow |
Frequently asked questions
Is atbash reversible?
Yes — run ATBASH on the result again and you'll get the original text back.
Does it handle accented letters and emoji correctly?
Yes. It encodes and decodes real UTF-8 bytes, so characters like á, ñ, €, and emoji work correctly — not just plain ASCII.
Is my text uploaded anywhere?
No. Everything runs locally in your browser in vanilla JavaScript — nothing you type ever leaves your device.