ASCII Table

Complete ASCII character reference with decimal, hex, octal, and binary values

Search ASCII Table

Dec	Hex	Oct	Binary	Symbol	Description
0	0x00	0000	00000000	NUL	Null character
1	0x01	0001	00000001	SOH	Start of Heading
2	0x02	0002	00000010	STX	Start of Text
3	0x03	0003	00000011	ETX	End of Text
4	0x04	0004	00000100	EOT	End of Transmission
5	0x05	0005	00000101	ENQ	Enquiry
6	0x06	0006	00000110	ACK	Acknowledgment
7	0x07	0007	00000111	BEL	Bell
8	0x08	0010	00001000	BS	Backspace
9	0x09	0011	00001001	HT	Horizontal Tab
10	0x0A	0012	00001010	LF	Line Feed
11	0x0B	0013	00001011	VT	Vertical Tab
12	0x0C	0014	00001100	FF	Form Feed
13	0x0D	0015	00001101	CR	Carriage Return
14	0x0E	0016	00001110	SO	Shift Out
15	0x0F	0017	00001111	SI	Shift In
16	0x10	0020	00010000	DLE	Data Link Escape
17	0x11	0021	00010001	DC1	Device Control 1 (XON)
18	0x12	0022	00010010	DC2	Device Control 2
19	0x13	0023	00010011	DC3	Device Control 3 (XOFF)
20	0x14	0024	00010100	DC4	Device Control 4
21	0x15	0025	00010101	NAK	Negative Acknowledgment
22	0x16	0026	00010110	SYN	Synchronous Idle
23	0x17	0027	00010111	ETB	End of Transmission Block
24	0x18	0030	00011000	CAN	Cancel
25	0x19	0031	00011001	EM	End of Medium
26	0x1A	0032	00011010	SUB	Substitute
27	0x1B	0033	00011011	ESC	Escape
28	0x1C	0034	00011100	FS	File Separator
29	0x1D	0035	00011101	GS	Group Separator
30	0x1E	0036	00011110	RS	Record Separator
31	0x1F	0037	00011111	US	Unit Separator
32	0x20	0040	00100000		Space
33	0x21	0041	00100001	!	Punctuation
34	0x22	0042	00100010	"	Punctuation
35	0x23	0043	00100011	#	Punctuation
36	0x24	0044	00100100	$	Punctuation
37	0x25	0045	00100101	%	Punctuation
38	0x26	0046	00100110	&	Punctuation
39	0x27	0047	00100111	'	Punctuation
40	0x28	0050	00101000	(	Punctuation
41	0x29	0051	00101001	)	Punctuation
42	0x2A	0052	00101010	*	Punctuation
43	0x2B	0053	00101011	+	Punctuation
44	0x2C	0054	00101100	,	Punctuation
45	0x2D	0055	00101101	-	Punctuation
46	0x2E	0056	00101110	.	Punctuation
47	0x2F	0057	00101111	/	Punctuation
48	0x30	0060	00110000	0	Digit
49	0x31	0061	00110001	1	Digit
50	0x32	0062	00110010	2	Digit
51	0x33	0063	00110011	3	Digit
52	0x34	0064	00110100	4	Digit
53	0x35	0065	00110101	5	Digit
54	0x36	0066	00110110	6	Digit
55	0x37	0067	00110111	7	Digit
56	0x38	0070	00111000	8	Digit
57	0x39	0071	00111001	9	Digit
58	0x3A	0072	00111010	:	Punctuation
59	0x3B	0073	00111011	;	Punctuation
60	0x3C	0074	00111100	<	Punctuation
61	0x3D	0075	00111101	=	Punctuation
62	0x3E	0076	00111110	>	Punctuation
63	0x3F	0077	00111111	?	Punctuation
64	0x40	0100	01000000	@	Punctuation
65	0x41	0101	01000001	A	Uppercase Letter
66	0x42	0102	01000010	B	Uppercase Letter
67	0x43	0103	01000011	C	Uppercase Letter
68	0x44	0104	01000100	D	Uppercase Letter
69	0x45	0105	01000101	E	Uppercase Letter
70	0x46	0106	01000110	F	Uppercase Letter
71	0x47	0107	01000111	G	Uppercase Letter
72	0x48	0110	01001000	H	Uppercase Letter
73	0x49	0111	01001001	I	Uppercase Letter
74	0x4A	0112	01001010	J	Uppercase Letter
75	0x4B	0113	01001011	K	Uppercase Letter
76	0x4C	0114	01001100	L	Uppercase Letter
77	0x4D	0115	01001101	M	Uppercase Letter
78	0x4E	0116	01001110	N	Uppercase Letter
79	0x4F	0117	01001111	O	Uppercase Letter
80	0x50	0120	01010000	P	Uppercase Letter
81	0x51	0121	01010001	Q	Uppercase Letter
82	0x52	0122	01010010	R	Uppercase Letter
83	0x53	0123	01010011	S	Uppercase Letter
84	0x54	0124	01010100	T	Uppercase Letter
85	0x55	0125	01010101	U	Uppercase Letter
86	0x56	0126	01010110	V	Uppercase Letter
87	0x57	0127	01010111	W	Uppercase Letter
88	0x58	0130	01011000	X	Uppercase Letter
89	0x59	0131	01011001	Y	Uppercase Letter
90	0x5A	0132	01011010	Z	Uppercase Letter
91	0x5B	0133	01011011	[	Punctuation
92	0x5C	0134	01011100	\	Punctuation
93	0x5D	0135	01011101	]	Punctuation
94	0x5E	0136	01011110	^	Punctuation
95	0x5F	0137	01011111	_	Punctuation
96	0x60	0140	01100000	`	Punctuation
97	0x61	0141	01100001	a	Lowercase Letter
98	0x62	0142	01100010	b	Lowercase Letter
99	0x63	0143	01100011	c	Lowercase Letter
100	0x64	0144	01100100	d	Lowercase Letter
101	0x65	0145	01100101	e	Lowercase Letter
102	0x66	0146	01100110	f	Lowercase Letter
103	0x67	0147	01100111	g	Lowercase Letter
104	0x68	0150	01101000	h	Lowercase Letter
105	0x69	0151	01101001	i	Lowercase Letter
106	0x6A	0152	01101010	j	Lowercase Letter
107	0x6B	0153	01101011	k	Lowercase Letter
108	0x6C	0154	01101100	l	Lowercase Letter
109	0x6D	0155	01101101	m	Lowercase Letter
110	0x6E	0156	01101110	n	Lowercase Letter
111	0x6F	0157	01101111	o	Lowercase Letter
112	0x70	0160	01110000	p	Lowercase Letter
113	0x71	0161	01110001	q	Lowercase Letter
114	0x72	0162	01110010	r	Lowercase Letter
115	0x73	0163	01110011	s	Lowercase Letter
116	0x74	0164	01110100	t	Lowercase Letter
117	0x75	0165	01110101	u	Lowercase Letter
118	0x76	0166	01110110	v	Lowercase Letter
119	0x77	0167	01110111	w	Lowercase Letter
120	0x78	0170	01111000	x	Lowercase Letter
121	0x79	0171	01111001	y	Lowercase Letter
122	0x7A	0172	01111010	z	Lowercase Letter
123	0x7B	0173	01111011	{	Punctuation
124	0x7C	0174	01111100	\|	Punctuation
125	0x7D	0175	01111101	}	Punctuation
126	0x7E	0176	01111110	~	Punctuation
127	0x7F	0177	01111111	DEL	Delete

Understanding ASCII

ASCII (American Standard Code for Information Interchange) is a character encoding standard that uses numeric codes to represent text characters. It was developed in the 1960s and remains fundamental to computing and telecommunications.

Standard ASCII

Standard ASCII uses 7 bits to represent each character, allowing for 128 different characters (0-127). These include:

Control characters (0-31 and 127)
Printable characters (32-126)

ASCII Character Categories

Control Characters (0-31, 127): Non-printable characters used for controlling devices and formatting text. Examples include NULL, TAB, CR (carriage return), and LF (line feed).
Printable Characters (32-126): Characters that can be displayed on screen or printed.

Space (32): The space character.
Punctuation and Symbols (33-47, 58-64, 91-96, 123-126): Characters like !, @, #, $, etc.
Numbers (48-57): Digits 0-9.
Uppercase Letters (65-90): A-Z.
Lowercase Letters (97-122): a-z.

ASCII in Computing

ASCII is the foundation for most modern character encoding schemes. It's essential for:

Text processing and manipulation in programming
Data exchange between different systems
Understanding how computers represent text internally
The basis for extended character sets like ISO-8859 and Unicode

Number Representations

ASCII characters can be represented in different number systems:

Decimal: Base-10 (0-9), the standard numbering system
Hexadecimal: Base-16 (0-9, A-F), commonly used in programming
Octal: Base-8 (0-7), less common but still used in some contexts
Binary: Base-2 (0-1), the fundamental representation in computers