ASCII Code Table

Lookup standard ASCII characters with decimal, hexadecimal, octal, binary and HTML entity mappings

ASCII Code Table

Lookup for standard ASCII 0-127 characters with radix conversion, category filters, and quick locate.

Showing 128 / 128

Decimal	Hex	Octal	Binary	Char	HTML Entity	Name/Description
0	00	000	0000000	NUL	-	Null (NUL)
1	01	001	0000001	SOH	-	Start of Heading (SOH)
2	02	002	0000010	STX	-	Start of Text (STX)
3	03	003	0000011	ETX	-	End of Text (ETX)
4	04	004	0000100	EOT	-	End of Transmission (EOT)
5	05	005	0000101	ENQ	-	Enquiry (ENQ)
6	06	006	0000110	ACK	-	Acknowledge (ACK)
7	07	007	0000111	BEL	-	Bell (BEL)
8	08	010	0001000	BS	-	Backspace (BS)
9	09	011	0001001	HT	-	Horizontal Tab (HT)
10	0A	012	0001010	LF	-	Line Feed (LF)
11	0B	013	0001011	VT	-	Vertical Tab (VT)
12	0C	014	0001100	FF	-	Form Feed (FF)
13	0D	015	0001101	CR	-	Carriage Return (CR)
14	0E	016	0001110	SO	-	Shift Out (SO)
15	0F	017	0001111	SI	-	Shift In (SI)
16	10	020	0010000	DLE	-	Data Link Escape (DLE)
17	11	021	0010001	DC1	-	Device Control 1 (DC1)
18	12	022	0010010	DC2	-	Device Control 2 (DC2)
19	13	023	0010011	DC3	-	Device Control 3 (DC3)
20	14	024	0010100	DC4	-	Device Control 4 (DC4)
21	15	025	0010101	NAK	-	Negative Acknowledge (NAK)
22	16	026	0010110	SYN	-	Synchronous Idle (SYN)
23	17	027	0010111	ETB	-	End of Transmission Block (ETB)
24	18	030	0011000	CAN	-	Cancel (CAN)
25	19	031	0011001	EM	-	End of Medium (EM)
26	1A	032	0011010	SUB	-	Substitute (SUB)
27	1B	033	0011011	ESC	-	Escape (ESC)
28	1C	034	0011100	FS	-	File Separator (FS)
29	1D	035	0011101	GS	-	Group Separator (GS)
30	1E	036	0011110	RS	-	Record Separator (RS)
31	1F	037	0011111	US	-	Unit Separator (US)
32	20	040	0100000	␠		Space character
33	21	041	0100001	!	!	Punctuation !
34	22	042	0100010	"	"	Punctuation "
35	23	043	0100011	#	#	Punctuation #
36	24	044	0100100	$	$	Punctuation $
37	25	045	0100101	%	%	Punctuation %
38	26	046	0100110	&	&	Punctuation &
39	27	047	0100111	'	'	Punctuation '
40	28	050	0101000	(	(	Punctuation (
41	29	051	0101001	)	)	Punctuation )
42	2A	052	0101010	*	*	Punctuation *
43	2B	053	0101011	+	+	Punctuation +
44	2C	054	0101100	,	,	Punctuation ,
45	2D	055	0101101	-	-	Punctuation -
46	2E	056	0101110	.	.	Punctuation .
47	2F	057	0101111	/	/	Punctuation /
48	30	060	0110000	0	0	Digit 0
49	31	061	0110001	1	1	Digit 1
50	32	062	0110010	2	2	Digit 2
51	33	063	0110011	3	3	Digit 3
52	34	064	0110100	4	4	Digit 4
53	35	065	0110101	5	5	Digit 5
54	36	066	0110110	6	6	Digit 6
55	37	067	0110111	7	7	Digit 7
56	38	070	0111000	8	8	Digit 8
57	39	071	0111001	9	9	Digit 9
58	3A	072	0111010	:	:	Punctuation :
59	3B	073	0111011	;	;	Punctuation ;
60	3C	074	0111100	<	<	Punctuation <
61	3D	075	0111101	=	=	Punctuation =
62	3E	076	0111110	>	>	Punctuation >
63	3F	077	0111111	?	?	Punctuation ?
64	40	100	1000000	@	@	Punctuation @
65	41	101	1000001	A	A	Uppercase letter A
66	42	102	1000010	B	B	Uppercase letter B
67	43	103	1000011	C	C	Uppercase letter C
68	44	104	1000100	D	D	Uppercase letter D
69	45	105	1000101	E	E	Uppercase letter E
70	46	106	1000110	F	F	Uppercase letter F
71	47	107	1000111	G	G	Uppercase letter G
72	48	110	1001000	H	H	Uppercase letter H
73	49	111	1001001	I	I	Uppercase letter I
74	4A	112	1001010	J	J	Uppercase letter J
75	4B	113	1001011	K	K	Uppercase letter K
76	4C	114	1001100	L	L	Uppercase letter L
77	4D	115	1001101	M	M	Uppercase letter M
78	4E	116	1001110	N	N	Uppercase letter N
79	4F	117	1001111	O	O	Uppercase letter O
80	50	120	1010000	P	P	Uppercase letter P
81	51	121	1010001	Q	Q	Uppercase letter Q
82	52	122	1010010	R	R	Uppercase letter R
83	53	123	1010011	S	S	Uppercase letter S
84	54	124	1010100	T	T	Uppercase letter T
85	55	125	1010101	U	U	Uppercase letter U
86	56	126	1010110	V	V	Uppercase letter V
87	57	127	1010111	W	W	Uppercase letter W
88	58	130	1011000	X	X	Uppercase letter X
89	59	131	1011001	Y	Y	Uppercase letter Y
90	5A	132	1011010	Z	Z	Uppercase letter Z
91	5B	133	1011011	[	[	Punctuation [
92	5C	134	1011100	\	\	Punctuation \
93	5D	135	1011101	]	]	Punctuation ]
94	5E	136	1011110	^	^	Punctuation ^
95	5F	137	1011111	_	_	Punctuation _
96	60	140	1100000	`	`	Punctuation `
97	61	141	1100001	a	a	Lowercase letter a
98	62	142	1100010	b	b	Lowercase letter b
99	63	143	1100011	c	c	Lowercase letter c
100	64	144	1100100	d	d	Lowercase letter d
101	65	145	1100101	e	e	Lowercase letter e
102	66	146	1100110	f	f	Lowercase letter f
103	67	147	1100111	g	g	Lowercase letter g
104	68	150	1101000	h	h	Lowercase letter h
105	69	151	1101001	i	i	Lowercase letter i
106	6A	152	1101010	j	j	Lowercase letter j
107	6B	153	1101011	k	k	Lowercase letter k
108	6C	154	1101100	l	l	Lowercase letter l
109	6D	155	1101101	m	m	Lowercase letter m
110	6E	156	1101110	n	n	Lowercase letter n
111	6F	157	1101111	o	o	Lowercase letter o
112	70	160	1110000	p	p	Lowercase letter p
113	71	161	1110001	q	q	Lowercase letter q
114	72	162	1110010	r	r	Lowercase letter r
115	73	163	1110011	s	s	Lowercase letter s
116	74	164	1110100	t	t	Lowercase letter t
117	75	165	1110101	u	u	Lowercase letter u
118	76	166	1110110	v	v	Lowercase letter v
119	77	167	1110111	w	w	Lowercase letter w
120	78	170	1111000	x	x	Lowercase letter x
121	79	171	1111001	y	y	Lowercase letter y
122	7A	172	1111010	z	z	Lowercase letter z
123	7B	173	1111011	{	{	Punctuation {
124	7C	174	1111100	\|	\|	Punctuation \|
125	7D	175	1111101	}	}	Punctuation }
126	7E	176	1111110	~	~	Punctuation ~
127	7F	177	1111111	DEL	-	Delete (DEL)

Extended ASCII (128-255)

Common Windows-1252 extended characters. Click any character to copy.

About ASCII Code Table

ASCII (American Standard Code for Information Interchange) is a foundational character encoding standard that uses 7-bit binary values to represent 128 characters for text and control flows.

Key Features

Full coverage of standard ASCII 0-127, including control and printable characters
Cross-reference of decimal, hex, octal, binary, and HTML entities
Category filters and keyword search for quick row targeting
Quick lookup by decimal/hex/octal/binary with auto highlight
Extended 128-255 reference for encoding troubleshooting

How to Use

Type a character, code value, or keyword in the search box.
Use category filters to narrow rows like numbers or control chars.
Open Quick Lookup and enter any radix value to jump to a row.
Copy character or HTML entity for code and documentation.

Use Cases

Character encoding and escape troubleshooting in development
Protocol, serial data, and log debugging workflows
HTML entity and special character processing in frontend work
Teaching and learning ASCII fundamentals

FAQ

Why are control characters not visibly printable?

Control characters are designed for control operations in data streams, not for visible glyph output, so this table displays their abbreviations.

Is extended ASCII identical on all systems?

Not exactly. Different code pages vary; this tool shows a common Windows-1252 reference set.

Will my data be uploaded to a server?

No. All lookup and filtering logic runs locally in your browser.

ASCII Code Table

Extended ASCII (128-255)

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About ASCII Code Table

Key Features

How to Use

Use Cases

FAQ