A1Z26 decoder and encoder

The A1Z26 encoding or ("cipher") got its name from the way it works: A=1, B=2, ..., Z=26. It is simplest possible letters to numbers translation. Although the encoding is intended for the English alphabet, it can easily be used for other languages as well. This translation tool will help you easily convert letters to numbers using any alphabet.

A1Z26, or variants of letters to numbers, is frequently used in geocaching mystery caches (puzzle caches), CTFs and logic puzzles.

Sample A1Z26 Cipher

Code-breaking is not only fun, but also a very good exercise for your brain and cognitive skills. Why don’t you try this example cipher:

20 8 1 20 23 9 12 12 2 5 5 1 19 25 18 5 16 12 9 5 4 20 8 5 13 1 14 6 15 18 23 8 5 14 19 8 5 11 14 15 23 19 25 15 21 1 18 5 9 14 20 8 5 3 15 21 14 20 18 25 15 6 20 8 5 23 9 14 11 9 5 19 19 8 5 23 9 12 12 6 9 14 4 25 15 21 1 14 4 13 1 11 5 25 15 21 1 12 12 8 5 18 19 12 1 22 5 19