Bảng ASCII
Complete reference of all 128 ASCII characters with decimal, hex, octal & binary codes.
128 characters shown
About ASCII
ASCII (American Standard Code for Information Interchange) is a 7-bit character encoding standard that defines 128 characters. It was first published in 1963 and is the foundation of most modern character encodings including UTF-8.
Character Ranges
- 0–31 · Control characters (non-printable)
- 32 · Space
- 33–47 · Punctuation & symbols
- 48–57 · Digits 0–9
- 65–90 · Uppercase A–Z
- 97–122 · Lowercase a–z
- 127 · DEL (delete)
What's the difference between ASCII and Unicode?
ASCII defines 128 characters using 7 bits. Unicode is a superset that covers over 149,000 characters from all writing systems. The first 128 Unicode code points are identical to ASCII.
How do I use these codes in programming?
In JavaScript: String.fromCharCode(65) → "A". In Python: chr(65). In C: (char)65. The hex values work with escape sequences: \x41 = "A".