A1Z26 Cipher Decoder

Solve or create number-letter puzzles fast. Type a message to get 8-5-12-12-15, or paste numbers to read the hidden word.

How to use the A1Z26 Cipher Decoder

  1. Type or paste your text into the box on the left.
  2. Adjust the options above if you need to. The result updates as you type.
  3. Click Copy result or Download to use your result.

What you can use it for

  • Solve geocaching and escape room clues
  • Create puzzles for kids and classrooms
  • Decode Gravity Falls-style ciphers

Private by design

The A1Z26 Cipher Decoder runs entirely in your browser. Your text and files are never uploaded or stored on a server, so it is safe for work documents and personal information. It is free, with no sign-up and no limits on how often you use it.

Frequently asked questions

What is the A1Z26 cipher?

It is a simple substitution cipher that swaps each letter for its position in the alphabet, so A is 1 and Z is 26.

How are words separated?

Letters are joined with your chosen separator and words are separated by a space or a slash.

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