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Cheat Sheets Data & Encoding

ASCII Table Cheat Sheet

All 95 printable ASCII characters with decimal and hex codes, the control characters you will meet, and handy patterns like the 32 gap between cases.

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ASCII (ASCII) gives each of 128 characters a number from 0 to 127. Codes 32 to 126 are the printable characters below; 0 to 31 and 127 are control codes that were designed for teleprinters. Convert text with the Text to ASCII Converter and ASCII to Text Converter, or change base with the Number Base Converter.

Printable characters (32 to 126)

Dec Hex Char Dec Hex Char Dec Hex Char Dec Hex Char
32 20 space 56 38 8 80 50 P 104 68 h
33 21 ! 57 39 9 81 51 Q 105 69 i
34 22 " 58 3A : 82 52 R 106 6A j
35 23 # 59 3B ; 83 53 S 107 6B k
36 24 $ 60 3C < 84 54 T 108 6C l
37 25 % 61 3D = 85 55 U 109 6D m
38 26 & 62 3E > 86 56 V 110 6E n
39 27 ' 63 3F ? 87 57 W 111 6F o
40 28 ( 64 40 @ 88 58 X 112 70 p
41 29 ) 65 41 A 89 59 Y 113 71 q
42 2A * 66 42 B 90 5A Z 114 72 r
43 2B + 67 43 C 91 5B [ 115 73 s
44 2C , 68 44 D 92 5C \ 116 74 t
45 2D - 69 45 E 93 5D ] 117 75 u
46 2E . 70 46 F 94 5E ^ 118 76 v
47 2F / 71 47 G 95 5F _ 119 77 w
48 30 0 72 48 H 96 60 ` 120 78 x
49 31 1 73 49 I 97 61 a 121 79 y
50 32 2 74 4A J 98 62 b 122 7A z
51 33 3 75 4B K 99 63 c 123 7B {
52 34 4 76 4C L 100 64 d 124 7C |
53 35 5 77 4D M 101 65 e 125 7D }
54 36 6 78 4E N 102 66 f 126 7E ~
55 37 7 79 4F O 103 67 g

Control characters you will meet

Dec Hex Name Meaning Escape
0 00 NUL Null \0
7 07 BEL Bell (beep) \a
8 08 BS Backspace \b
9 09 HT Horizontal tab \t
10 0A LF Line feed (newline) \n
11 0B VT Vertical tab \v
12 0C FF Form feed \f
13 0D CR Carriage return \r
27 1B ESC Escape \e
127 7F DEL Delete

The other control codes (SOH, STX, ETX, EOT, ENQ, ACK, SO, SI, DLE, DC1 to DC4, NAK, SYN, ETB, CAN, EM, SUB, FS, GS, RS and US) fill codes 1 to 31 and are rare outside serial protocols. EOT (4) is what Ctrl+D sends in a terminal.

Patterns worth knowing

  • Digits 0 to 9 are 48 to 57, so a digit's value is its code minus 48.
  • Upper-case letters A to Z are 65 to 90 and lower-case a to z are 97 to 122. They differ by exactly 32, one bit, so flipping bit 5 switches case.
  • Control characters can be typed as Ctrl plus a letter: Ctrl+J is LF (10) and Ctrl+M is CR (13).
  • Line endings. Unix and macOS end lines with LF (10), Windows with CR LF (13 10), and very old Mac systems with CR.
  • Beyond 127. ASCII is only 7 bits. "Extended ASCII" tables differ by system; use UTF-8 for anything outside the table.

Try these tools

Text to ASCII Converter

Convert human-readable text strings into their standard ASCII decimal codes (Base-10).

ASCII to Text Converter

Convert ASCII character codes (Base-10) back into human-readable text.

Number Base Converter

Convert integers and fractions of any size between bases 2 and 36 (binary, octal, decimal, hexadecimal, base 36 and more).

Unicode Character Inspector

Paste text to see every character's code point, general category, script, UTF-8 bytes, UTF-16 code units and escapes for JavaScript.

See also

  • Glossary ASCII
    ASCII is a 7-bit character encoding that assigns numbers 0 to 127 to English letters, digits, punctuation and control codes.
  • Glossary UTF-8
    UTF-8 is the dominant Unicode encoding, writing each character as one to four bytes and staying identical to ASCII for the first 128.
  • Guide How Base64 and Encoding Work
    What encoding is (and is not), how Base64 turns three bytes into four characters, why it adds a third, and the mistakes to avoid.
  • Guide How Number Bases Work: Binary, Octal and Hex
    Place value in binary, octal and hexadecimal, converting 202 between all of them step by step, hex colours.
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