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ASCII Converter

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Type a value in any field and the others follow. Everything is converted in your browser: nothing is uploaded.

With a width the numbers are written with all their bits, and a negative number as two's complement.
ASCII table: codes 0 to 127

The first 32 codes and code 127 are control characters, the others are letters, digits and signs. The characters are shown the way they are typed.

DecimalHexOctalBinaryCharacterName
0 00 000 00000000 NUL Null
1 01 001 00000001 SOH Start of heading
2 02 002 00000010 STX Start of text
3 03 003 00000011 ETX End of text
4 04 004 00000100 EOT End of transmission
5 05 005 00000101 ENQ Enquiry
6 06 006 00000110 ACK Acknowledge
7 07 007 00000111 BEL Bell
8 08 010 00001000 BS Backspace
9 09 011 00001001 HT Horizontal tab
10 0A 012 00001010 LF Line feed (new line)
11 0B 013 00001011 VT Vertical tab
12 0C 014 00001100 FF Form feed
13 0D 015 00001101 CR Carriage return
14 0E 016 00001110 SO Shift out
15 0F 017 00001111 SI Shift in
16 10 020 00010000 DLE Data link escape
17 11 021 00010001 DC1 Device control 1 (XON)
18 12 022 00010010 DC2 Device control 2
19 13 023 00010011 DC3 Device control 3 (XOFF)
20 14 024 00010100 DC4 Device control 4
21 15 025 00010101 NAK Negative acknowledge
22 16 026 00010110 SYN Synchronous idle
23 17 027 00010111 ETB End of transmission block
24 18 030 00011000 CAN Cancel
25 19 031 00011001 EM End of medium
26 1A 032 00011010 SUB Substitute
27 1B 033 00011011 ESC Escape
28 1C 034 00011100 FS File separator
29 1D 035 00011101 GS Group separator
30 1E 036 00011110 RS Record separator
31 1F 037 00011111 US Unit separator
32 20 040 00100000 SP Space
33 21 041 00100001 !
34 22 042 00100010 "
35 23 043 00100011 #
36 24 044 00100100 $
37 25 045 00100101 %
38 26 046 00100110 &
39 27 047 00100111 '
40 28 050 00101000 (
41 29 051 00101001 )
42 2A 052 00101010 *
43 2B 053 00101011 +
44 2C 054 00101100 ,
45 2D 055 00101101 -
46 2E 056 00101110 .
47 2F 057 00101111 /
48 30 060 00110000 0
49 31 061 00110001 1
50 32 062 00110010 2
51 33 063 00110011 3
52 34 064 00110100 4
53 35 065 00110101 5
54 36 066 00110110 6
55 37 067 00110111 7
56 38 070 00111000 8
57 39 071 00111001 9
58 3A 072 00111010 :
59 3B 073 00111011 ;
60 3C 074 00111100 <
61 3D 075 00111101 =
62 3E 076 00111110 >
63 3F 077 00111111 ?
64 40 100 01000000 @
65 41 101 01000001 A
66 42 102 01000010 B
67 43 103 01000011 C
68 44 104 01000100 D
69 45 105 01000101 E
70 46 106 01000110 F
71 47 107 01000111 G
72 48 110 01001000 H
73 49 111 01001001 I
74 4A 112 01001010 J
75 4B 113 01001011 K
76 4C 114 01001100 L
77 4D 115 01001101 M
78 4E 116 01001110 N
79 4F 117 01001111 O
80 50 120 01010000 P
81 51 121 01010001 Q
82 52 122 01010010 R
83 53 123 01010011 S
84 54 124 01010100 T
85 55 125 01010101 U
86 56 126 01010110 V
87 57 127 01010111 W
88 58 130 01011000 X
89 59 131 01011001 Y
90 5A 132 01011010 Z
91 5B 133 01011011 [
92 5C 134 01011100 \
93 5D 135 01011101 ]
94 5E 136 01011110 ^
95 5F 137 01011111 _
96 60 140 01100000 `
97 61 141 01100001 a
98 62 142 01100010 b
99 63 143 01100011 c
100 64 144 01100100 d
101 65 145 01100101 e
102 66 146 01100110 f
103 67 147 01100111 g
104 68 150 01101000 h
105 69 151 01101001 i
106 6A 152 01101010 j
107 6B 153 01101011 k
108 6C 154 01101100 l
109 6D 155 01101101 m
110 6E 156 01101110 n
111 6F 157 01101111 o
112 70 160 01110000 p
113 71 161 01110001 q
114 72 162 01110010 r
115 73 163 01110011 s
116 74 164 01110100 t
117 75 165 01110101 u
118 76 166 01110110 v
119 77 167 01110111 w
120 78 170 01111000 x
121 79 171 01111001 y
122 7A 172 01111010 z
123 7B 173 01111011 {
124 7C 174 01111100 |
125 7D 175 01111101 }
126 7E 176 01111110 ~
127 7F 177 01111111 DEL Delete

ASCII Converter: Text to ASCII Codes and Back

Type text and see the code of every character in decimal, hex, binary or octal, or paste codes and read the text. The table of all 128 ASCII characters is below the converter. Everything happens in your browser: nothing you type is uploaded.

What is ASCII

ASCII (American Standard Code for Information Interchange) gives a number from 0 to 127 to each of 128 characters: the English letters, the digits, punctuation, and 33 control characters such as the line feed (10) and the tab (9). The capital A is 65 (41 in hex), the lowercase a is 97, the digit 0 is 48 and the space is 32. Every code fits in seven bits.

ASCII, UTF-8 and Unicode

ASCII has no letters of other languages. Unicode gives a number to every character of every language, and UTF-8 is the way these numbers are saved as bytes. The first 128 characters are the same in UTF-8 as in ASCII, one byte each, so a text in English has the same bytes in both. A letter like "e with an acute accent" or a Cyrillic letter takes two bytes in UTF-8 (C3 A9 for the first), and an emoji takes four. This converter shows the real bytes of the text in UTF-8, so non-English text gives more codes than letters. Codes from 128 to 255 are not ASCII: they belong to old code pages and are not converted by this tool.

How to use it

  • Text to ASCII: type or paste the text; choose the format of the codes (decimal, hex, binary, octal), the separator and the capitals.
  • ASCII to text: paste the codes in the right box. Separate them with spaces, commas or line breaks, or write hex and binary as one run of digits. The prefixes 0x and \x are read.
  • The number of bytes is shown under the boxes, and bytes that are not valid UTF-8 text are reported.

Limitations

  • This is not an ASCII art generator; it converts characters to numbers.
  • A byte is at most 255: a larger number is reported as an error.
  • The control characters have no visible form; the table shows their names.

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