Atbash cipher

Client

Mirror the alphabet (a↔z)—same operation encodes and decodes. Compare ROT13.

About Atbash cipher

Encode or decode text with Atbash letter substitution (a↔z)—reversible, in your browser. The interactive transform on this page runs in your browser tab—Toolcore does not need your paste for the core operation described above.

How to use this page

Paste or type in the main workspace, run the primary action from the toolbar, then copy or download the result. Use Load example when the page offers it, or URL prefill (?q= / ?qb=) so agents and tickets open the same input.

Nearby workflows on Toolcore

  • ROT13 & Caesar cipher — Rotate Latin letters A–Z and a–z: ROT13 (self-inverse) or Caesar shift 0–25—other characters unchanged, local only. for the next text or markup step in your edit loop.
  • Reverse text — Flip string character order by Unicode code point—copy reversed text locally in your browser. for the next text or markup step in your edit loop.
  • Pig Latin translator — Convert English text to Pig Latin—move leading consonants and append ay, locally. for the next text or markup step in your edit loop.
  • String case converter — camelCase, snake_case, kebab-case, PascalCase, CONST_CASE from one paste—client-side. for the next text or markup step in your edit loop.

Common use cases

  • Decode classic puzzle ciphers.
  • Demonstrate simple monoalphabetic substitution.

Common mistakes to avoid

  • Expecting digits to map

    Only A–Z / a–z letters are transformed.

FAQ

Is Atbash self-inverse?

Yes—applying it twice returns the original letters.

Is data uploaded?

No. Substitution runs locally.

More tools

Related utilities you can open in another tab—mostly client-side.