ASCII Table

All 128 ASCII characters with their codes in every base.

ASCII (the American Standard Code for Information Interchange) assigns numbers 0 to 127 to the English letters, digits, punctuation and a set of control characters, using 7 bits. Codes 0 to 31 and 127 are control characters, originally commands for teleprinters, of which tab (9), line feed (10) and carriage return (13) are still everywhere. Codes 32 to 126 are printable, starting with the space.

UTF-8, the encoding of nearly every web page, is backward compatible with ASCII: the first 128 code points are encoded as the same single bytes, so ASCII text is valid UTF-8. A few patterns are worth knowing: digits 0-9 are 48-57 (0x30-0x39), uppercase letters are 65-90 and lowercase 97-122, exactly 32 apart, so flipping bit 5 (0x20) switches case. Codes 128-255 are not ASCII: their meaning depends on the encoding, such as Latin-1 or Windows-1252.

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128 entries

Control characters (0-31)

Dec	Hex	Oct	Binary	Char	Description
0	00	000	0000000	NUL	Null
1	01	001	0000001	SOH	Start of heading
2	02	002	0000010	STX	Start of text
3	03	003	0000011	ETX	End of text (Ctrl+C)
4	04	004	0000100	EOT	End of transmission (Ctrl+D)
5	05	005	0000101	ENQ	Enquiry
6	06	006	0000110	ACK	Acknowledge
7	07	007	0000111	BEL	Bell (\a)
8	08	010	0001000	BS	Backspace (\b)
9	09	011	0001001	HT	Horizontal tab (\t)
10	0A	012	0001010	LF	Line feed, newline (\n)
11	0B	013	0001011	VT	Vertical tab (\v)
12	0C	014	0001100	FF	Form feed (\f)
13	0D	015	0001101	CR	Carriage return (\r)
14	0E	016	0001110	SO	Shift out
15	0F	017	0001111	SI	Shift in
16	10	020	0010000	DLE	Data link escape
17	11	021	0010001	DC1	Device control 1 (XON)
18	12	022	0010010	DC2	Device control 2
19	13	023	0010011	DC3	Device control 3 (XOFF)
20	14	024	0010100	DC4	Device control 4
21	15	025	0010101	NAK	Negative acknowledge
22	16	026	0010110	SYN	Synchronous idle
23	17	027	0010111	ETB	End of transmission block
24	18	030	0011000	CAN	Cancel
25	19	031	0011001	EM	End of medium
26	1A	032	0011010	SUB	Substitute (Ctrl+Z)
27	1B	033	0011011	ESC	Escape (\e, \x1b)
28	1C	034	0011100	FS	File separator
29	1D	035	0011101	GS	Group separator
30	1E	036	0011110	RS	Record separator
31	1F	037	0011111	US	Unit separator

Printable characters (32-126) and DEL (127)

Dec	Hex	Oct	Binary	Char	Description
32	20	040	0100000	SP	Space
33	21	041	0100001	!	Exclamation mark
34	22	042	0100010	"	Double quote
35	23	043	0100011	#	Number sign, hash
36	24	044	0100100	$	Dollar sign
37	25	045	0100101	%	Percent sign
38	26	046	0100110	&	Ampersand
39	27	047	0100111	'	Apostrophe, single quote
40	28	050	0101000	(	Left parenthesis
41	29	051	0101001	)	Right parenthesis
42	2A	052	0101010	*	Asterisk
43	2B	053	0101011	+	Plus sign
44	2C	054	0101100	,	Comma
45	2D	055	0101101	-	Hyphen-minus
46	2E	056	0101110	.	Period, full stop
47	2F	057	0101111	/	Slash
48	30	060	0110000	0	Digit 0
49	31	061	0110001	1	Digit 1
50	32	062	0110010	2	Digit 2
51	33	063	0110011	3	Digit 3
52	34	064	0110100	4	Digit 4
53	35	065	0110101	5	Digit 5
54	36	066	0110110	6	Digit 6
55	37	067	0110111	7	Digit 7
56	38	070	0111000	8	Digit 8
57	39	071	0111001	9	Digit 9
58	3A	072	0111010	:	Colon
59	3B	073	0111011	;	Semicolon
60	3C	074	0111100	<	Less-than sign
61	3D	075	0111101	=	Equals sign
62	3E	076	0111110	>	Greater-than sign
63	3F	077	0111111	?	Question mark
64	40	100	1000000	@	At sign
65	41	101	1000001	A	Uppercase A
66	42	102	1000010	B	Uppercase B
67	43	103	1000011	C	Uppercase C
68	44	104	1000100	D	Uppercase D
69	45	105	1000101	E	Uppercase E
70	46	106	1000110	F	Uppercase F
71	47	107	1000111	G	Uppercase G
72	48	110	1001000	H	Uppercase H
73	49	111	1001001	I	Uppercase I
74	4A	112	1001010	J	Uppercase J
75	4B	113	1001011	K	Uppercase K
76	4C	114	1001100	L	Uppercase L
77	4D	115	1001101	M	Uppercase M
78	4E	116	1001110	N	Uppercase N
79	4F	117	1001111	O	Uppercase O
80	50	120	1010000	P	Uppercase P
81	51	121	1010001	Q	Uppercase Q
82	52	122	1010010	R	Uppercase R
83	53	123	1010011	S	Uppercase S
84	54	124	1010100	T	Uppercase T
85	55	125	1010101	U	Uppercase U
86	56	126	1010110	V	Uppercase V
87	57	127	1010111	W	Uppercase W
88	58	130	1011000	X	Uppercase X
89	59	131	1011001	Y	Uppercase Y
90	5A	132	1011010	Z	Uppercase Z
91	5B	133	1011011	[	Left square bracket
92	5C	134	1011100	\	Backslash
93	5D	135	1011101	]	Right square bracket
94	5E	136	1011110	^	Caret, circumflex
95	5F	137	1011111	_	Underscore
96	60	140	1100000	`	Grave accent, backtick
97	61	141	1100001	a	Lowercase a
98	62	142	1100010	b	Lowercase b
99	63	143	1100011	c	Lowercase c
100	64	144	1100100	d	Lowercase d
101	65	145	1100101	e	Lowercase e
102	66	146	1100110	f	Lowercase f
103	67	147	1100111	g	Lowercase g
104	68	150	1101000	h	Lowercase h
105	69	151	1101001	i	Lowercase i
106	6A	152	1101010	j	Lowercase j
107	6B	153	1101011	k	Lowercase k
108	6C	154	1101100	l	Lowercase l
109	6D	155	1101101	m	Lowercase m
110	6E	156	1101110	n	Lowercase n
111	6F	157	1101111	o	Lowercase o
112	70	160	1110000	p	Lowercase p
113	71	161	1110001	q	Lowercase q
114	72	162	1110010	r	Lowercase r
115	73	163	1110011	s	Lowercase s
116	74	164	1110100	t	Lowercase t
117	75	165	1110101	u	Lowercase u
118	76	166	1110110	v	Lowercase v
119	77	167	1110111	w	Lowercase w
120	78	170	1111000	x	Lowercase x
121	79	171	1111001	y	Lowercase y
122	7A	172	1111010	z	Lowercase z
123	7B	173	1111011	{	Left curly brace
124	7C	174	1111100	\|	Vertical bar, pipe
125	7D	175	1111101	}	Right curly brace
126	7E	176	1111110	~	Tilde
127	7F	177	1111111	DEL	Delete

Good to know

Line endings

Unix, Linux and macOS end lines with LF (10, \n). Windows uses CR followed by LF (13 10, \r\n). Classic Mac OS used CR alone. Mixed line endings are a common cause of noisy diffs and failing scripts.

About ASCII table

Control characters (0-31)

Printable characters (32-126) and DEL (127)

Good to know

Line endings

More references