ASCII code

Each of the 128 ASCII characters maps to a unique decimal number between 0 and 127. The letter "A" is code 65 (hex 0x41, binary 01000001). These mappings were standardized in 1963 by ANSI committee X3.2, and the same codes still underpin every text file, URL, email header, and programming language today.

Convert text to its ASCII codes with our text-to-ASCII tool, or go the other way with ASCII-to-text. You can also look up any character by its decimal code on the full ASCII table or in hex, octal, and binary using the base converter.