Complete ASCII character table (0–255) with decimal, hexadecimal, octal, and binary values. Search by value or name, filter by type, click any row for full detail including HTML entity and C escape.
ASCII (American Standard Code for Information Interchange) is a 7-bit character encoding standard that defines 128 characters: 33 control characters (0–31 and 127) and 95 printable characters (32–126) including letters, digits, and symbols. It was first published in 1963 and remains the foundation of modern character encoding systems like UTF-8.
The extended ASCII range (128–255) uses the 8th bit to define 128 additional characters. These vary by code page (Windows-1252, ISO 8859-1, etc.) and include accented letters, currency symbols, and box-drawing characters. In this table, values above 127 are displayed using the browser's default encoding.