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ASCII Code Table

Quick reference for 7-bit ASCII (0–127) with common number bases and character meaning.

Legend

  • Dec / Hex / Oct / Bin: decimal, hexadecimal, octal, binary representations
  • Char: printable glyph (or placeholder for control chars)
  • Caret: common terminal notation for control chars (e.g., ^M for CR)

Control Characters (0–31) + DEL (127)

Dec Hex Oct Bin Caret Name Description
0 0x00 000 00000000 ^@ NUL Null character
1 0x01 001 00000001 ^A SOH Start of heading
2 0x02 002 00000010 ^B STX Start of text
3 0x03 003 00000011 ^C ETX End of text
4 0x04 004 00000100 ^D EOT End of transmission
5 0x05 005 00000101 ^E ENQ Enquiry
6 0x06 006 00000110 ^F ACK Acknowledge
7 0x07 007 00000111 ^G BEL Bell / alert
8 0x08 010 00001000 ^H BS Backspace
9 0x09 011 00001001 ^I HT Horizontal tab
10 0x0A 012 00001010 ^J LF Line feed (newline)
11 0x0B 013 00001011 ^K VT Vertical tab
12 0x0C 014 00001100 ^L FF Form feed
13 0x0D 015 00001101 ^M CR Carriage return
14 0x0E 016 00001110 ^N SO Shift out
15 0x0F 017 00001111 ^O SI Shift in
16 0x10 020 00010000 ^P DLE Data link escape
17 0x11 021 00010001 ^Q DC1 Device control 1 (XON)
18 0x12 022 00010010 ^R DC2 Device control 2
19 0x13 023 00010011 ^S DC3 Device control 3 (XOFF)
20 0x14 024 00010100 ^T DC4 Device control 4
21 0x15 025 00010101 ^U NAK Negative acknowledge
22 0x16 026 00010110 ^V SYN Synchronous idle
23 0x17 027 00010111 ^W ETB End of transmission block
24 0x18 030 00011000 ^X CAN Cancel
25 0x19 031 00011001 ^Y EM End of medium
26 0x1A 032 00011010 ^Z SUB Substitute
27 0x1B 033 00011011 ^[ ESC Escape
28 0x1C 034 00011100 ^\ FS File separator
29 0x1D 035 00011101 ^] GS Group separator
30 0x1E 036 00011110 ^^ RS Record separator
31 0x1F 037 00011111 ^_ US Unit separator
127 0x7F 177 01111111 ^? DEL Delete

Printable Characters (32–126)

Dec Hex Oct Bin Char Name / Notes
32 0x20 040 00100000 ␠ SPACE
33 0x21 041 00100001 ! EXCLAMATION MARK
34 0x22 042 00100010 " QUOTATION MARK
35 0x23 043 00100011 # NUMBER SIGN
36 0x24 044 00100100 $ DOLLAR SIGN
37 0x25 045 00100101 % PERCENT SIGN
38 0x26 046 00100110 & AMPERSAND
39 0x27 047 00100111 ' APOSTROPHE
40 0x28 050 00101000 ( LEFT PARENTHESIS
41 0x29 051 00101001 ) RIGHT PARENTHESIS
42 0x2A 052 00101010 * ASTERISK
43 0x2B 053 00101011 + PLUS SIGN
44 0x2C 054 00101100 , COMMA
45 0x2D 055 00101101 - HYPHEN-MINUS
46 0x2E 056 00101110 . FULL STOP
47 0x2F 057 00101111 / SOLIDUS (slash)
48 0x30 060 00110000 0 DIGIT
49 0x31 061 00110001 1 DIGIT
50 0x32 062 00110010 2 DIGIT
51 0x33 063 00110011 3 DIGIT
52 0x34 064 00110100 4 DIGIT
53 0x35 065 00110101 5 DIGIT
54 0x36 066 00110110 6 DIGIT
55 0x37 067 00110111 7 DIGIT
56 0x38 070 00111000 8 DIGIT
57 0x39 071 00111001 9 DIGIT
58 0x3A 072 00111010 : COLON
59 0x3B 073 00111011 ; SEMICOLON
60 0x3C 074 00111100 < LESS-THAN SIGN
61 0x3D 075 00111101 = EQUALS SIGN
62 0x3E 076 00111110 > GREATER-THAN SIGN
63 0x3F 077 00111111 ? QUESTION MARK
64 0x40 100 01000000 @ COMMERCIAL AT
65 0x41 101 01000001 A UPPERCASE LETTER
66 0x42 102 01000010 B UPPERCASE LETTER
67 0x43 103 01000011 C UPPERCASE LETTER
68 0x44 104 01000100 D UPPERCASE LETTER
69 0x45 105 01000101 E UPPERCASE LETTER
70 0x46 106 01000110 F UPPERCASE LETTER
71 0x47 107 01000111 G UPPERCASE LETTER
72 0x48 110 01001000 H UPPERCASE LETTER
73 0x49 111 01001001 I UPPERCASE LETTER
74 0x4A 112 01001010 J UPPERCASE LETTER
75 0x4B 113 01001011 K UPPERCASE LETTER
76 0x4C 114 01001100 L UPPERCASE LETTER
77 0x4D 115 01001101 M UPPERCASE LETTER
78 0x4E 116 01001110 N UPPERCASE LETTER
79 0x4F 117 01001111 O UPPERCASE LETTER
80 0x50 120 01010000 P UPPERCASE LETTER
81 0x51 121 01010001 Q UPPERCASE LETTER
82 0x52 122 01010010 R UPPERCASE LETTER
83 0x53 123 01010011 S UPPERCASE LETTER
84 0x54 124 01010100 T UPPERCASE LETTER
85 0x55 125 01010101 U UPPERCASE LETTER
86 0x56 126 01010110 V UPPERCASE LETTER
87 0x57 127 01010111 W UPPERCASE LETTER
88 0x58 130 01011000 X UPPERCASE LETTER
89 0x59 131 01011001 Y UPPERCASE LETTER
90 0x5A 132 01011010 Z UPPERCASE LETTER
91 0x5B 133 01011011 [ LEFT SQUARE BRACKET
92 0x5C 134 01011100 \ REVERSE SOLIDUS (backslash)
93 0x5D 135 01011101 ] RIGHT SQUARE BRACKET
94 0x5E 136 01011110 ^ CIRCUMFLEX ACCENT
95 0x5F 137 01011111 _ LOW LINE (underscore)
96 0x60 140 01100000 ` GRAVE ACCENT
97 0x61 141 01100001 a lowercase letter
98 0x62 142 01100010 b lowercase letter
99 0x63 143 01100011 c lowercase letter
100 0x64 144 01100100 d lowercase letter
101 0x65 145 01100101 e lowercase letter
102 0x66 146 01100110 f lowercase letter
103 0x67 147 01100111 g lowercase letter
104 0x68 150 01101000 h lowercase letter
105 0x69 151 01101001 i lowercase letter
106 0x6A 152 01101010 j lowercase letter
107 0x6B 153 01101011 k lowercase letter
108 0x6C 154 01101100 l lowercase letter
109 0x6D 155 01101101 m lowercase letter
110 0x6E 156 01101110 n lowercase letter
111 0x6F 157 01101111 o lowercase letter
112 0x70 160 01110000 p lowercase letter
113 0x71 161 01110001 q lowercase letter
114 0x72 162 01110010 r lowercase letter
115 0x73 163 01110011 s lowercase letter
116 0x74 164 01110100 t lowercase letter
117 0x75 165 01110101 u lowercase letter
118 0x76 166 01110110 v lowercase letter
119 0x77 167 01110111 w lowercase letter
120 0x78 170 01111000 x lowercase letter
121 0x79 171 01111001 y lowercase letter
122 0x7A 172 01111010 z lowercase letter
123 0x7B 173 01111011 { LEFT CURLY BRACKET
124 0x7C 174 01111100 \| VERTICAL LINE (pipe)
125 0x7D 175 01111101 } RIGHT CURLY BRACKET
126 0x7E 176 01111110 ~ TILDE

Common Quick Picks

Item Dec Hex Notes
NUL 0 0x00 Often string terminator in C
TAB 9 0x09 \t
LF 10 0x0A \n (Unix newline)
CR 13 0x0D \r
ESC 27 0x1B Escape key / ANSI escape sequences
SPACE 32 0x20 Space character
DEL 127 0x7F Delete / rubout