ASCII (American Standard Code for Information Interchange) is a computer encoding system based on the Latin alphabet. It defines 128 character codes, including 33 control characters (non-printable) and 95 printable characters such as English letters, numbers, and punctuation marks. ASCII codes use 7-bit binary numbers (0-127) to represent all characters and are one of the most fundamental character encoding standards in computer systems. This tool supports converting text to decimal, hexadecimal, or binary ASCII codes, as well as decoding these formats back to the original text.