Numbers to letters converter (A1Z26)
Turn A1Z26 numbers back into text to solve puzzles and escape room clues. It is a puzzle cipher, not protection.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Enter numbers.
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
Letter = letter number n in the English alphabet, where 1 = A and 26 = Z. If / is present it separates words; otherwise spaces separate words when hyphens or commas join the numbers.
Example
Result: Text: HELLO WORLD; Letters: 10.
8-5-12-12-15 23-15-18-12-4
HELLO WORLD
Limits and caveats
- This is a puzzle and teaching cipher that is easy to break, so never use it to protect passwords or sensitive data.
- If numbers are separated by spaces only, without /, the result is one word.
Questions about this tool
Why is my result one long word?
The numbers are separated by spaces only. Put / between words, or join the numbers of each word with hyphens.
What about 0 or 27?
Neither maps to a letter in A1Z26, so you get an error naming the number.
Does it support the A = 0 variant?
No. It follows standard A1Z26, which starts at A = 1.