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ASCII Table Reference: Decimal, Hex, Binary, and Characters

A complete ASCII table — printable characters 32–126 with decimal, hex, and binary values, plus the control characters and what they do.

What ASCII Is

ASCII maps the numbers 0–127 to characters: 0–31 and 127 are control characters, 32–126 are printable. Each code fits in 7 bits, which is why converting text to binary produces 7- or 8-bit groups per character.

Printable Characters (32–126)

Dec Hex Char Dec Hex Char Dec Hex Char
32 20 (space) 64 40 @ 96 60 `
33 21 ! 65 41 A 97 61 a
34 22 " 66 42 B 98 62 b
35 23 # 67 43 C 99 63 c
36 24 $ 68 44 D 100 64 d
37 25 % 69 45 E 101 65 e
38 26 & 70 46 F 102 66 f
39 27 ' 71 47 G 103 67 g
40 28 ( 72 48 H 104 68 h
41 29 ) 73 49 I 105 69 i
48 30 0 80 50 P 112 70 p
49 31 1 81 51 Q 113 71 q
57 39 9 90 5A Z 122 7A z
58 3A : 91 5B [ 123 7B {
61 3D = 93 5D ] 125 7D }
63 3F ? 95 5F _ 126 7E ~

(Letters and digits are contiguous: A=65, Z=90, a=97, z=122, 0=48, 9=57.)

Two Handy Facts

  • Uppercase to lowercase differ by exactly 32 (A=65, a=97). Flip the 0x20 bit to change case.
  • Digit to value: '7' is 55, so subtract 48 ('0') to get the numeric value — the classic char - '0' trick.

Control Characters (selected)

Dec Hex Name Meaning
0 00 NUL null terminator
9 09 HT horizontal tab
10 0A LF line feed (newline on Unix)
13 0D CR carriage return
27 1B ESC escape (ANSI sequences)
127 7F DEL delete

\r\n (CR+LF, 13+10) is the Windows line ending; Unix uses just \n (10).

ASCII, Unicode, and Binary

ASCII is the first 128 code points of Unicode, and UTF-8 encodes them identically — one byte each. Anything beyond 127 (accents, emoji, CJK) needs multiple bytes in UTF-8. To see a character's bits, convert it with the text to binary tool; for code points beyond ASCII, use text to Unicode.

Frequently Asked Questions

What is the ASCII code for 'A'? 65 in decimal, 0x41 in hex, 1000001 in binary. Lowercase 'a' is 97.

How many characters are in ASCII? 128 (codes 0–127): 33 control characters and 95 printable characters including space.

What is the binary for ASCII letters? Each ASCII character is 7 bits (often stored in 8). 'A' (65) is 1000001; convert any text to see its bits.

Convert text to its binary representation with the text to binary tool.