Convert letters into numbers instantly! Just type or paste your text, choose language and code type, and see the result. Punctuation and other unconvertible characters are ignored automatically.
Numbering the letters so A=1, B=2, etc is one of the simplest ways of converting them to numbers. This is called the A1Z26 cipher. However, there are more options such as ASCII codes and tap codes to decode numbers.
Standard (A1Z26)
Convert each letter to its numeric equivalent in alphabetical order (A=1, B=2, C=3, etc). This is also known as the A1Z26 encryption. No difference is made between uppercase or lowercase.
A1Z26 translation
Zero-based (A0Z25)
Similar to standard conversion, but start from zero (A=0, B=1, C=2, etc). This is also sometimes called the A0Z25 cipher.
A0Z25 translation
ASCII
Convert text to ASCII codes. ASCII codes represent not only letters, but also symbols, digits and spaces are handled by this translator. In ASCII codes there is a difference between uppercase and lowercase letters. For a complete list of ASCII codes see here.
ASCII translation
Hex ASCII
Similar to ASCII, but the converted numbers are expressed in hexadecimal format.
Hex ASCII translation
Binary ASCII
Similar to ASCII, but the converted numbers are expressed in binary format.
Binary ASCII translation
Letter numbers are used frequently in geocaching mystery caches (puzzle caches), CTFs and puzzle games.
See also: Code-Breaking tools | A1z26 | Ascii table | Barcode | Base64 decoder | Base64 encoder | Baudot code | Book cipher | Geek code | Numbers to letters | Pixel values extractor | Qr codes | Unicode | Utf-8 decoder | Utf-8 encoder