🔢 A1Z26 Cipher (Letter ↔ Number)
A=1, B=2, … Z=26 — turn words into number strings and back. The classic puzzle and escape-room code, decoded instantly.
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How the a1z26 cipher (letter ↔ number) works
The A1Z26 cipher simply numbers the alphabet: A is 1, B is 2, through Z as 26. To encode, each letter becomes its position; to decode, each number becomes its letter. This tool separates letters within a word by dashes and words by spaces, so "HI THERE" becomes "8-9 20-8-5-18-5". Decoding accepts dashes, commas, dots or spaces between the numbers.
It's a substitution with no secrecy at all — its value is as a puzzle and teaching device, and it appears constantly in escape rooms, geocaching, ARGs and children's code games. A common twist layers it on another step (a Caesar shift, or reading the numbers as something else), so if the plain decode looks like nonsense, the numbers may need further work.
Frequently asked questions
What is the A1Z26 cipher?
A simple code that replaces each letter with its position in the alphabet: A=1, B=2, up to Z=26. "CAB" becomes "3-1-2". It's one of the most common codes in puzzles and escape rooms.
How do I separate the numbers?
This tool uses dashes between letters and spaces between words, so words stay readable — "8-9" is "HI". When decoding, it accepts dashes, spaces, commas or dots between numbers.
The decoded text is gibberish — what now?
A1Z26 is often just the first layer of a puzzle. Try applying a Caesar shift to the result, reversing it, or reading the numbers differently. The plain letter-for-number decode is only step one.
Is A1Z26 secure?
No — it's a fixed, keyless substitution anyone can reverse. It's meant for puzzles and learning, not for protecting information.
Is my text uploaded?
No — the conversion happens in your browser.