ASCII Table — Complete 0–127 Reference

Every ASCII character with its decimal, binary, hexadecimal and octal value — plus the control codes.

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ASCII is 128 characters — 33 control codes and 95 printable characters — each identified by a number from 0 to 127. This is the lookup table: every code in decimal, binary, hexadecimal and octal, with the name and purpose of each control character explained. Ctrl+F to find any character by name or code.

ASCII (American Standard Code for Information Interchange) was standardized in 1963 and remains the base of every modern text encoding, including UTF-8. The first 128 code points of Unicode are identical to ASCII by design, which is why a plain-ASCII file and its UTF-8 version look bit-for-bit the same.

Printable ASCII characters (32–126)

The characters you actually type: space, digits, uppercase and lowercase letters, and punctuation. Every keyboard on Earth speaks these.

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

ASCII control characters (0–31 and 127)

These are the non-printable codes. Most were designed for teletypes and are now obsolete, but a handful drive modern text (line feed, carriage return, tab, null) and terminal control (escape).

Dec	Hex	Bin	Ctrl	Name	Purpose
0	00	0000000	^@	NUL	Null byte — string terminator in C
1	01	0000001	^A	SOH	Start of heading
2	02	0000010	^B	STX	Start of text
3	03	0000011	^C	ETX	End of text — Ctrl+C interrupt in shells
4	04	0000100	^D	EOT	End of transmission — Ctrl+D end of file
5	05	0000101	^E	ENQ	Enquiry
6	06	0000110	^F	ACK	Acknowledge
7	07	0000111	^G	BEL	Bell — plays a terminal beep
8	08	0001000	^H	BS	Backspace
9	09	0001001	^I	HT	Horizontal tab
10	0A	0001010	^J	LF	Line feed — Unix newline (\n)
11	0B	0001011	^K	VT	Vertical tab
12	0C	0001100	^L	FF	Form feed — page break
13	0D	0001101	^M	CR	Carriage return — half of Windows newline (\r\n)
14	0E	0001110	^N	SO	Shift out
15	0F	0001111	^O	SI	Shift in
16	10	0010000	^P	DLE	Data link escape
17	11	0010001	^Q	DC1	Device control 1 — XON
18	12	0010010	^R	DC2	Device control 2
19	13	0010011	^S	DC3	Device control 3 — XOFF
20	14	0010100	^T	DC4	Device control 4
21	15	0010101	^U	NAK	Negative acknowledge
22	16	0010110	^V	SYN	Synchronous idle
23	17	0010111	^W	ETB	End of transmission block
24	18	0011000	^X	CAN	Cancel
25	19	0011001	^Y	EM	End of medium
26	1A	0011010	^Z	SUB	Substitute — Ctrl+Z suspend / DOS end-of-file
27	1B	0011011	^[	ESC	Escape — leads every ANSI terminal sequence
28	1C	0011100	^\	FS	File separator
29	1D	0011101	^]	GS	Group separator
30	1E	0011110	^^	RS	Record separator
31	1F	0011111	^_	US	Unit separator
127	7F	1111111	^?	DEL	Delete — the highest ASCII value

Convert between characters and codes in code

Excel and Google Sheets — CODE returns the number for a character, CHAR returns the character for a number:
=CODE("A")     → 65
=CHAR(65)      → A
=CHAR(9)       → tab character
=CHAR(10)      → line feed (use in a wrapped cell for a manual line break)

Python — ord and chr do the same:
ord("A")       # 65
chr(65)        # "A"
chr(10)        # "\n"

JavaScript — charCodeAt and String.fromCharCode:
"A".charCodeAt(0)          // 65
String.fromCharCode(65)    // "A"

The two operations you need for every ASCII lookup, in the three most common environments.

What comes after 127 — extended ASCII and UTF-8

ASCII ends at 127. The bytes from 128 to 255 are NOT standard ASCII — they belong to whichever 8-bit codepage the file was saved in (Latin-1 / ISO-8859-1 in Western Europe, Windows-1252, various regional codepages). "Extended ASCII" is really a marketing term for that legacy byte range, and different codepages assign different characters to the same byte, which is the classic cause of "mojibake" (garbled characters) when a file is opened in the wrong encoding.

UTF-8 solved this by encoding every Unicode character (over 150,000 of them and counting) as one to four bytes, with the property that any pure-ASCII text is bit-for-bit identical in UTF-8. That is why saving a plain English text file as ASCII or as UTF-8 produces the same file. The binary-hex reference on this site covers the byte-level view, and the HTML entities tool converts between characters and their HTML entity names for the ones you cannot type directly.

ASCII Table — Complete 0–127 Reference

Printable ASCII characters (32–126)

ASCII control characters (0–31 and 127)

Convert between characters and codes in code

What comes after 127 — extended ASCII and UTF-8

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