Atbash Cipher

Reusable cipher tool template with a strong mobile layout and a clean desktop expansion.

Alphabet mapping

Atbash mirrors the alphabet: A ↔ Z, B ↔ Y, C ↔ X, and so on. It uses no key.

Type: Monoalphabetic substitution

Key: None

Direction: Same both ways

Middle pair: M ↔ N

Options

Preserve case

Keep punctuation & numbers

Remove whitespace

Group letters

Grouped output temporarily overrides the options above and uses uppercase letters only. Punctuation, numbers, and whitespace are ignored while grouping is on.

Atbash is self-inverse: encrypting and decrypting use the same mapping.

Output stats

Mode:

Operation: Same mapping either way

Input letters:

Input chars:

Output chars:

Blocks: