ASCII table — codes 0 to 127 in decimal, hex, octal and binary

Search the 128 ASCII characters by decimal code, hex code such as 0x41, the character itself or a word such as tab, and each match shows its decimal, hex, octal and 8-bit binary value, the HTML code and a short description.

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Table

Dec	Hex	Oct	Binary	Char	HTML	Description
0	00	000	00000000	NUL		Null
1	01	001	00000001	SOH		Start of heading
2	02	002	00000010	STX		Start of text
3	03	003	00000011	ETX		End of text
4	04	004	00000100	EOT		End of transmission
5	05	005	00000101	ENQ		Enquiry
6	06	006	00000110	ACK		Acknowledge
7	07	007	00000111	BEL		Bell
8	08	010	00001000	BS		Backspace
9	09	011	00001001	HT		Horizontal tab
10	0A	012	00001010	LF		Line feed (newline)
11	0B	013	00001011	VT		Vertical tab
12	0C	014	00001100	FF		Form feed
13	0D	015	00001101	CR		Carriage return
14	0E	016	00001110	SO		Shift out
15	0F	017	00001111	SI		Shift in
16	10	020	00010000	DLE		Data link escape
17	11	021	00010001	DC1		Device control 1 (XON)
18	12	022	00010010	DC2		Device control 2
19	13	023	00010011	DC3		Device control 3 (XOFF)
20	14	024	00010100	DC4		Device control 4
21	15	025	00010101	NAK		Negative acknowledge
22	16	026	00010110	SYN		Synchronous idle
23	17	027	00010111	ETB		End of transmission block
24	18	030	00011000	CAN		Cancel
25	19	031	00011001	EM		End of medium
26	1A	032	00011010	SUB		Substitute
27	1B	033	00011011	ESC		Escape
28	1C	034	00011100	FS		File separator
29	1D	035	00011101	GS		Group separator
30	1E	036	00011110	RS		Record separator
31	1F	037	00011111	US		Unit separator
32	20	040	00100000	(space)		Space
33	21	041	00100001	!	!	Exclamation mark
34	22	042	00100010	"	"	Quotation mark
35	23	043	00100011	#	#	Number sign (hash)
36	24	044	00100100	$	$	Dollar sign
37	25	045	00100101	%	%	Percent sign
38	26	046	00100110	&	&	Ampersand
39	27	047	00100111	'	'	Apostrophe
40	28	050	00101000	(	(	Left parenthesis
41	29	051	00101001	)	)	Right parenthesis
42	2A	052	00101010	*	*	Asterisk
43	2B	053	00101011	+	+	Plus sign
44	2C	054	00101100	,	,	Comma
45	2D	055	00101101	-	-	Hyphen-minus
46	2E	056	00101110	.	.	Full stop
47	2F	057	00101111	/	/	Slash
48	30	060	00110000	0	0	Digit 0
49	31	061	00110001	1	1	Digit 1
50	32	062	00110010	2	2	Digit 2
51	33	063	00110011	3	3	Digit 3
52	34	064	00110100	4	4	Digit 4
53	35	065	00110101	5	5	Digit 5
54	36	066	00110110	6	6	Digit 6
55	37	067	00110111	7	7	Digit 7
56	38	070	00111000	8	8	Digit 8
57	39	071	00111001	9	9	Digit 9
58	3A	072	00111010	:	:	Colon
59	3B	073	00111011	;	;	Semicolon
60	3C	074	00111100	<	<	Less-than sign
61	3D	075	00111101	=	=	Equals sign
62	3E	076	00111110	>	>	Greater-than sign
63	3F	077	00111111	?	?	Question mark
64	40	100	01000000	@	@	At sign
65	41	101	01000001	A	A	Capital letter A
66	42	102	01000010	B	B	Capital letter B
67	43	103	01000011	C	C	Capital letter C
68	44	104	01000100	D	D	Capital letter D
69	45	105	01000101	E	E	Capital letter E
70	46	106	01000110	F	F	Capital letter F
71	47	107	01000111	G	G	Capital letter G
72	48	110	01001000	H	H	Capital letter H
73	49	111	01001001	I	I	Capital letter I
74	4A	112	01001010	J	J	Capital letter J
75	4B	113	01001011	K	K	Capital letter K
76	4C	114	01001100	L	L	Capital letter L
77	4D	115	01001101	M	M	Capital letter M
78	4E	116	01001110	N	N	Capital letter N
79	4F	117	01001111	O	O	Capital letter O
80	50	120	01010000	P	P	Capital letter P
81	51	121	01010001	Q	Q	Capital letter Q
82	52	122	01010010	R	R	Capital letter R
83	53	123	01010011	S	S	Capital letter S
84	54	124	01010100	T	T	Capital letter T
85	55	125	01010101	U	U	Capital letter U
86	56	126	01010110	V	V	Capital letter V
87	57	127	01010111	W	W	Capital letter W
88	58	130	01011000	X	X	Capital letter X
89	59	131	01011001	Y	Y	Capital letter Y
90	5A	132	01011010	Z	Z	Capital letter Z
91	5B	133	01011011	[	[	Left square bracket
92	5C	134	01011100	\	\	Backslash
93	5D	135	01011101	]	]	Right square bracket
94	5E	136	01011110	^	^	Caret
95	5F	137	01011111	_	_	Underscore
96	60	140	01100000	`	`	Grave accent (backtick)
97	61	141	01100001	a	a	Small letter a
98	62	142	01100010	b	b	Small letter b
99	63	143	01100011	c	c	Small letter c
100	64	144	01100100	d	d	Small letter d
101	65	145	01100101	e	e	Small letter e
102	66	146	01100110	f	f	Small letter f
103	67	147	01100111	g	g	Small letter g
104	68	150	01101000	h	h	Small letter h
105	69	151	01101001	i	i	Small letter i
106	6A	152	01101010	j	j	Small letter j
107	6B	153	01101011	k	k	Small letter k
108	6C	154	01101100	l	l	Small letter l
109	6D	155	01101101	m	m	Small letter m
110	6E	156	01101110	n	n	Small letter n
111	6F	157	01101111	o	o	Small letter o
112	70	160	01110000	p	p	Small letter p
113	71	161	01110001	q	q	Small letter q
114	72	162	01110010	r	r	Small letter r
115	73	163	01110011	s	s	Small letter s
116	74	164	01110100	t	t	Small letter t
117	75	165	01110101	u	u	Small letter u
118	76	166	01110110	v	v	Small letter v
119	77	167	01110111	w	w	Small letter w
120	78	170	01111000	x	x	Small letter x
121	79	171	01111001	y	y	Small letter y
122	7A	172	01111010	z	z	Small letter z
123	7B	173	01111011	{	{	Left curly bracket
124	7C	174	01111100	\|	\|	Vertical bar
125	7D	175	01111101	}	}	Right curly bracket
126	7E	176	01111110	~	~	Tilde
127	7F	177	01111111	DEL		Delete

128 rows — scroll inside the table, or download the CSV.

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How to use the ASCII table

Leave Filter empty to see all 128 rows.
Type a decimal code (65) or a hex code with 0x (0x41) to jump to that one character.
Type a single character (~) to find it exactly.
Type a word (tab, bracket, control) to search the descriptions. Every word must match.
Download the rows as ascii.csv if you need them in a spreadsheet.

What it does and when to use it

ASCII is the base layer of almost every text format: source code, HTTP headers, CSV, JSON keys and terminal output. You need its numbers when you read a hex dump, write a parser that splits on a delimiter, escape a control character in a string, or work out why a file has an invisible character at the end of each line. This table gives every representation of a character side by side.

To convert whole strings into codes, use Text to ASCII Codes. To view the bytes of a real file, use the Hex Dump Viewer.

How it works

The table holds the 128 codes of US-ASCII (ANSI X3.4, also published as RFC 20). For each code it computes the hex (two digits), octal (three digits) and 8-bit binary forms. Codes 0–31 and 127 are control characters; they are shown by their standard abbreviations, such as NUL, HT, LF, CR, ESC and DEL, and get no HTML code because they cannot be shown as text. Printable characters get a numeric reference such as ~, or a named one where the HTML table uses one, such as ". Searching happens in your browser.

Worked examples

A newline in a hex dump. Filter 0x0A:

10 | 0A | 012 | 00001010 | LF |  | Line feed (newline)

A character by itself. Filter ~ returns 126 | 7E | 176 | 01111110 | ~ | ~ | Tilde.

By name. Filter quot returns the double quote: 34 | 22 | 042 | 00100010 | " | " | Quotation mark.

Not ASCII. Filter é returns “Nothing matches that filter.”

Limits and tips

A number is always read as a decimal code, so 10 finds LF, not the text “10”. Use 0x for hex.
A one-character filter matches the character column only. A space alone is ignored as a filter; search for space instead.
For all named HTML entities beyond ASCII, see the HTML Entities Ref. For any Unicode code point, use the Unicode Character Lookup.

Frequently asked questions

Why does é or € not appear?

ASCII has only 128 characters, codes 0 to 127, and they cover unaccented English letters, digits, punctuation and control codes. Accented letters, other scripts and symbols such as € live in Unicode, usually stored as UTF-8. Use the Unicode Character Lookup for those.

What is the difference between LF and CR LF?

Unix, Linux and macOS end lines with LF (10, 0x0A). Windows text files and HTTP headers use CR LF (13 then 10). A stray CR often shows up as ^M or breaks a shell script with "bad interpreter".

How are upper and lower case related?

A is 65 (0x41) and a is 97 (0x61). Each lower-case letter is its capital plus 32, a single bit (0x20), which is why simple case conversion can flip one bit.

What is the "extended ASCII" range 128 to 255?

It is not ASCII. Different code pages, such as Latin-1 and Windows-1252, use 128–255 for different characters, so this table stops at 127.

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Table

How to use the ASCII table

What it does and when to use it

How it works

Worked examples

Limits and tips

Frequently asked questions

Was this tool useful?

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