Encoding / Decoding

ASCII / Code Point Lookup

Look up character code points in decimal and hexadecimal.

Input characters

What is ASCII Converter?

ASCII (American Standard Code for Information Interchange) is a character encoding standard. This tool converts between characters and their ASCII codes.

Features

  • Character to ASCII code conversion
  • ASCII code to character conversion
  • Support for decimal, hex, octal, and binary
  • ASCII table reference

Frequently Asked Questions

Why does the ASCII table only have 128 characters?
ASCII is a 7-bit encoding: 2 to the 7th power gives 128 positions. 0–31 are control characters (CR=13 is carriage return), 32 is space, 65–90 are uppercase A–Z, and 97–122 are lowercase a–z. There is no room for accented letters or Chinese — those require larger systems like Unicode/UTF-8.
Are decimal 65, hex 0x41, and binary 01000001 the same character?
Yes — all three are the letter A in different notations. This tool shows DEC, HEX, OCT, and BIN side by side for every character, so you never have to convert between bases by hand while reading a table.
Why do some characters show values above 127?
Characters outside ASCII (Chinese, é, emoji) are Unicode with code points far beyond 127. The tool displays their Unicode code point and UTF-8 byte sequence instead of failing — a practical way to see that ASCII is a subset of UTF-8.