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ASCII Table

Full 128-character ASCII reference — decimal, hex, octal, binary, with search and filter

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Show columns:

Dec	Hex	Oct	Bin	Char	Name
0	0x00	000	00000000	NUL	NUL
1	0x01	001	00000001	SOH	SOH
2	0x02	002	00000010	STX	STX
3	0x03	003	00000011	ETX	ETX
4	0x04	004	00000100	EOT	EOT
5	0x05	005	00000101	ENQ	ENQ
6	0x06	006	00000110	ACK	ACK
7	0x07	007	00000111	BEL	BEL
8	0x08	010	00001000	BS	BS
9	0x09	011	00001001	TAB	TAB
10	0x0A	012	00001010	LF	LF
11	0x0B	013	00001011	VT	VT
12	0x0C	014	00001100	FF	FF
13	0x0D	015	00001101	CR	CR
14	0x0E	016	00001110	SO	SO
15	0x0F	017	00001111	SI	SI
16	0x10	020	00010000	DLE	DLE
17	0x11	021	00010001	DC1	DC1
18	0x12	022	00010010	DC2	DC2
19	0x13	023	00010011	DC3	DC3
20	0x14	024	00010100	DC4	DC4
21	0x15	025	00010101	NAK	NAK
22	0x16	026	00010110	SYN	SYN
23	0x17	027	00010111	ETB	ETB
24	0x18	030	00011000	CAN	CAN
25	0x19	031	00011001	EM	EM
26	0x1A	032	00011010	SUB	SUB
27	0x1B	033	00011011	ESC	ESC
28	0x1C	034	00011100	FS	FS
29	0x1D	035	00011101	GS	GS
30	0x1E	036	00011110	RS	RS
31	0x1F	037	00011111	US	US
32	0x20	040	00100000	Space	Space
33	0x21	041	00100001	!	!
34	0x22	042	00100010	"	"
35	0x23	043	00100011	#	#
36	0x24	044	00100100	$	$
37	0x25	045	00100101	%	%
38	0x26	046	00100110	&	&
39	0x27	047	00100111	'	'
40	0x28	050	00101000	(	(
41	0x29	051	00101001	)	)
42	0x2A	052	00101010	*	*
43	0x2B	053	00101011	+	+
44	0x2C	054	00101100	,	,
45	0x2D	055	00101101	-	-
46	0x2E	056	00101110	.	.
47	0x2F	057	00101111	/	/
48	0x30	060	00110000	0	0
49	0x31	061	00110001	1	1
50	0x32	062	00110010	2	2
51	0x33	063	00110011	3	3
52	0x34	064	00110100	4	4
53	0x35	065	00110101	5	5
54	0x36	066	00110110	6	6
55	0x37	067	00110111	7	7
56	0x38	070	00111000	8	8
57	0x39	071	00111001	9	9
58	0x3A	072	00111010	:	:
59	0x3B	073	00111011	;	;
60	0x3C	074	00111100	<	<
61	0x3D	075	00111101	=	=
62	0x3E	076	00111110	>	>
63	0x3F	077	00111111	?	?
64	0x40	100	01000000	@	@
65	0x41	101	01000001	A	A
66	0x42	102	01000010	B	B
67	0x43	103	01000011	C	C
68	0x44	104	01000100	D	D
69	0x45	105	01000101	E	E
70	0x46	106	01000110	F	F
71	0x47	107	01000111	G	G
72	0x48	110	01001000	H	H
73	0x49	111	01001001	I	I
74	0x4A	112	01001010	J	J
75	0x4B	113	01001011	K	K
76	0x4C	114	01001100	L	L
77	0x4D	115	01001101	M	M
78	0x4E	116	01001110	N	N
79	0x4F	117	01001111	O	O
80	0x50	120	01010000	P	P
81	0x51	121	01010001	Q	Q
82	0x52	122	01010010	R	R
83	0x53	123	01010011	S	S
84	0x54	124	01010100	T	T
85	0x55	125	01010101	U	U
86	0x56	126	01010110	V	V
87	0x57	127	01010111	W	W
88	0x58	130	01011000	X	X
89	0x59	131	01011001	Y	Y
90	0x5A	132	01011010	Z	Z
91	0x5B	133	01011011	[	[
92	0x5C	134	01011100	\	\
93	0x5D	135	01011101	]	]
94	0x5E	136	01011110	^	^
95	0x5F	137	01011111	_	_
96	0x60	140	01100000	`	`
97	0x61	141	01100001	a	a
98	0x62	142	01100010	b	b
99	0x63	143	01100011	c	c
100	0x64	144	01100100	d	d
101	0x65	145	01100101	e	e
102	0x66	146	01100110	f	f
103	0x67	147	01100111	g	g
104	0x68	150	01101000	h	h
105	0x69	151	01101001	i	i
106	0x6A	152	01101010	j	j
107	0x6B	153	01101011	k	k
108	0x6C	154	01101100	l	l
109	0x6D	155	01101101	m	m
110	0x6E	156	01101110	n	n
111	0x6F	157	01101111	o	o
112	0x70	160	01110000	p	p
113	0x71	161	01110001	q	q
114	0x72	162	01110010	r	r
115	0x73	163	01110011	s	s
116	0x74	164	01110100	t	t
117	0x75	165	01110101	u	u
118	0x76	166	01110110	v	v
119	0x77	167	01110111	w	w
120	0x78	170	01111000	x	x
121	0x79	171	01111001	y	y
122	0x7A	172	01111010	z	z
123	0x7B	173	01111011	{	{
124	0x7C	174	01111100	\|	\|
125	0x7D	175	01111101	}	}
126	0x7E	176	01111110	~	~
127	0x7F	177	01111111	DEL	DEL

Showing 128 of 128 ASCII characters.

Quick Lookup

Type a character to see its ASCII code:

You need the hex code for the escape character. Or the decimal value for a carriage return. Or you are debugging a binary protocol and need to identify character 0x1B. An ASCII table is a reference you reach for constantly when working with low-level text processing, serial protocols, or encoding issues.

What Is ASCII?

ASCII (American Standard Code for Information Interchange) is a 7-bit character encoding standard published in 1963. It defines 128 characters: 33 non-printing control characters (0–31 and 127) and 95 printable characters (32–126, including space).

ASCII is the foundation of virtually all modern character encodings. UTF-8, the dominant encoding on the web, is backward-compatible with ASCII — the first 128 Unicode code points are identical to ASCII.

Character Categories

Control Characters (0–31, 127)

The first 32 ASCII codes and code 127 (DEL) are non-printing control characters. Originally designed for teleprinter control, many still have active roles:

Dec	Hex	Abbr	Name	Modern Use
0	00	NUL	Null	String terminator in C
9	09	HT	Horizontal Tab	`\t` in source code
10	0A	LF	Line Feed	`\n` — Unix line ending
13	0D	CR	Carriage Return	`\r` — Windows line ending (with LF)
27	1B	ESC	Escape	ANSI escape sequences for terminal colors
127	7F	DEL	Delete	Backspace on many terminals

Printable Characters (32–126)

Range	Category	Characters
32	Space	(invisible but printable)
48–57	Digits	0 1 2 3 4 5 6 7 8 9
65–90	Uppercase	A B C … Z
97–122	Lowercase	a b c … z
33–47, 58–64, 91–96, 123–126	Symbols	! ” # $ % & ’ ( ) * + , - . / : ; < = > ? @ [ \ ] ^ _ ` {

Number System Representations

Each ASCII character can be represented in multiple number systems:

System	Base	Example (Letter ‘A’)
Decimal	10	65
Hexadecimal	16	0x41
Octal	8	0101
Binary	2	01000001

ASCII in Programming

String comparison relies on ASCII values. 'A' < 'Z' is true because 65 < 90. 'a' > 'A' is true because 97 > 65. This is why case-insensitive sorting requires explicit handling.

Character conversion. To convert uppercase to lowercase, add 32: 'A' (65) + 32 = 'a' (97). To check if a character is a digit: c >= 48 && c <= 57 (or c >= '0' && c <= '9').

Escape sequences. Control characters are represented in code as escape sequences: \n (LF, 10), \t (HT, 9), \r (CR, 13), \0 (NUL, 0), \x1B (ESC, 27).

ASCII vs. Unicode

ASCII defines 128 characters — enough for English but not for the world’s languages. Unicode extends this to over 149,000 characters across 161 scripts. UTF-8, the most common Unicode encoding, uses 1–4 bytes per character and is fully backward-compatible with ASCII: any valid ASCII text is also valid UTF-8.

Privacy

This tool is a static reference that runs entirely in your browser. No data is transmitted to any server.

Frequently Asked Questions

How many characters are in the ASCII table? ASCII defines exactly 128 characters (0–127): 33 non-printing control characters and 95 printable characters including space.

What is the difference between ASCII and UTF-8? ASCII uses 7 bits and defines 128 characters. UTF-8 is a variable-length encoding (1–4 bytes) that supports all Unicode characters. The first 128 UTF-8 characters are identical to ASCII, making them backward-compatible.

Why does ASCII start at 0, not 1? ASCII code 0 (NUL) serves as a string terminator in C and many protocols. Starting at 0 aligns with how computers address memory and is standard in computing.

What is the ASCII code for a newline? Line Feed (LF) is ASCII 10 (0x0A). Unix/Linux/macOS use LF alone as line endings. Windows uses CR+LF (13 + 10, or 0x0D 0x0A).

Can I search for a specific character? Yes. Use the search box to find characters by name, abbreviation, decimal value, or hex value. You can also filter by category (control, digit, letter, symbol).

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