ASCII Table: Codes 0 to 255 in Dec, Hex, Octal & Binary

Range

128 / 128

Dec	Hex	Oct	Binary	Char	HTML entity	Unicode	UTF-8 bytes	Description
0	0x00	000	00000000	·	n/a	U+0000	00	NUL, Null
1	0x01	001	00000001	·	n/a	U+0001	01	SOH, Start of heading
2	0x02	002	00000010	·	n/a	U+0002	02	STX, Start of text
3	0x03	003	00000011	·	n/a	U+0003	03	ETX, End of text
4	0x04	004	00000100	·	n/a	U+0004	04	EOT, End of transmission
5	0x05	005	00000101	·	n/a	U+0005	05	ENQ, Enquiry
6	0x06	006	00000110	·	n/a	U+0006	06	ACK, Acknowledge
7	0x07	007	00000111	·	n/a	U+0007	07	BEL, Bell
8	0x08	010	00001000	·	n/a	U+0008	08	BS, Backspace
9	0x09	011	00001001	·		U+0009	09	HT, Horizontal tab
10	0x0A	012	00001010	·		U+000A	0A	LF, Line feed (newline)
11	0x0B	013	00001011	·	n/a	U+000B	0B	VT, Vertical tab
12	0x0C	014	00001100	·	n/a	U+000C	0C	FF, Form feed
13	0x0D	015	00001101	·		U+000D	0D	CR, Carriage return
14	0x0E	016	00001110	·	n/a	U+000E	0E	SO, Shift out
15	0x0F	017	00001111	·	n/a	U+000F	0F	SI, Shift in
16	0x10	020	00010000	·	n/a	U+0010	10	DLE, Data link escape
17	0x11	021	00010001	·	n/a	U+0011	11	DC1, Device control 1 (XON)
18	0x12	022	00010010	·	n/a	U+0012	12	DC2, Device control 2
19	0x13	023	00010011	·	n/a	U+0013	13	DC3, Device control 3 (XOFF)
20	0x14	024	00010100	·	n/a	U+0014	14	DC4, Device control 4
21	0x15	025	00010101	·	n/a	U+0015	15	NAK, Negative acknowledge
22	0x16	026	00010110	·	n/a	U+0016	16	SYN, Synchronous idle
23	0x17	027	00010111	·	n/a	U+0017	17	ETB, End of transmission block
24	0x18	030	00011000	·	n/a	U+0018	18	CAN, Cancel
25	0x19	031	00011001	·	n/a	U+0019	19	EM, End of medium
26	0x1A	032	00011010	·	n/a	U+001A	1A	SUB, Substitute
27	0x1B	033	00011011	·	n/a	U+001B	1B	ESC, Escape
28	0x1C	034	00011100	·	n/a	U+001C	1C	FS, File separator
29	0x1D	035	00011101	·	n/a	U+001D	1D	GS, Group separator
30	0x1E	036	00011110	·	n/a	U+001E	1E	RS, Record separator
31	0x1F	037	00011111	·	n/a	U+001F	1F	US, Unit separator
32	0x20	040	00100000	(space)		U+0020	20	Space
33	0x21	041	00100001	!	!	U+0021	21	Exclamation mark
34	0x22	042	00100010	"	" "	U+0022	22	Double quote
35	0x23	043	00100011	#	#	U+0023	23	Number sign (hash)
36	0x24	044	00100100	$	$	U+0024	24	Dollar sign
37	0x25	045	00100101	%	%	U+0025	25	Percent sign
38	0x26	046	00100110	&	& &	U+0026	26	Ampersand
39	0x27	047	00100111	'	' '	U+0027	27	Apostrophe (single quote)
40	0x28	050	00101000	(	(	U+0028	28	Left parenthesis
41	0x29	051	00101001	)	)	U+0029	29	Right parenthesis
42	0x2A	052	00101010	*	*	U+002A	2A	Asterisk
43	0x2B	053	00101011	+	+	U+002B	2B	Plus sign
44	0x2C	054	00101100	,	,	U+002C	2C	Comma
45	0x2D	055	00101101	-	-	U+002D	2D	Hyphen-minus
46	0x2E	056	00101110	.	.	U+002E	2E	Full stop (period)
47	0x2F	057	00101111	/	/	U+002F	2F	Slash
48	0x30	060	00110000	0	0	U+0030	30	Digit 0
49	0x31	061	00110001	1	1	U+0031	31	Digit 1
50	0x32	062	00110010	2	2	U+0032	32	Digit 2
51	0x33	063	00110011	3	3	U+0033	33	Digit 3
52	0x34	064	00110100	4	4	U+0034	34	Digit 4
53	0x35	065	00110101	5	5	U+0035	35	Digit 5
54	0x36	066	00110110	6	6	U+0036	36	Digit 6
55	0x37	067	00110111	7	7	U+0037	37	Digit 7
56	0x38	070	00111000	8	8	U+0038	38	Digit 8
57	0x39	071	00111001	9	9	U+0039	39	Digit 9
58	0x3A	072	00111010	:	:	U+003A	3A	Colon
59	0x3B	073	00111011	;	;	U+003B	3B	Semicolon
60	0x3C	074	00111100	<	< <	U+003C	3C	Less-than sign
61	0x3D	075	00111101	=	=	U+003D	3D	Equals sign
62	0x3E	076	00111110	>	> >	U+003E	3E	Greater-than sign
63	0x3F	077	00111111	?	?	U+003F	3F	Question mark
64	0x40	100	01000000	@	@	U+0040	40	At sign
65	0x41	101	01000001	A	A	U+0041	41	Uppercase A
66	0x42	102	01000010	B	B	U+0042	42	Uppercase B
67	0x43	103	01000011	C	C	U+0043	43	Uppercase C
68	0x44	104	01000100	D	D	U+0044	44	Uppercase D
69	0x45	105	01000101	E	E	U+0045	45	Uppercase E
70	0x46	106	01000110	F	F	U+0046	46	Uppercase F
71	0x47	107	01000111	G	G	U+0047	47	Uppercase G
72	0x48	110	01001000	H	H	U+0048	48	Uppercase H
73	0x49	111	01001001	I	I	U+0049	49	Uppercase I
74	0x4A	112	01001010	J	J	U+004A	4A	Uppercase J
75	0x4B	113	01001011	K	K	U+004B	4B	Uppercase K
76	0x4C	114	01001100	L	L	U+004C	4C	Uppercase L
77	0x4D	115	01001101	M	M	U+004D	4D	Uppercase M
78	0x4E	116	01001110	N	N	U+004E	4E	Uppercase N
79	0x4F	117	01001111	O	O	U+004F	4F	Uppercase O
80	0x50	120	01010000	P	P	U+0050	50	Uppercase P
81	0x51	121	01010001	Q	Q	U+0051	51	Uppercase Q
82	0x52	122	01010010	R	R	U+0052	52	Uppercase R
83	0x53	123	01010011	S	S	U+0053	53	Uppercase S
84	0x54	124	01010100	T	T	U+0054	54	Uppercase T
85	0x55	125	01010101	U	U	U+0055	55	Uppercase U
86	0x56	126	01010110	V	V	U+0056	56	Uppercase V
87	0x57	127	01010111	W	W	U+0057	57	Uppercase W
88	0x58	130	01011000	X	X	U+0058	58	Uppercase X
89	0x59	131	01011001	Y	Y	U+0059	59	Uppercase Y
90	0x5A	132	01011010	Z	Z	U+005A	5A	Uppercase Z
91	0x5B	133	01011011	[	[	U+005B	5B	Left square bracket
92	0x5C	134	01011100	\	\	U+005C	5C	Backslash
93	0x5D	135	01011101	]	]	U+005D	5D	Right square bracket
94	0x5E	136	01011110	^	^	U+005E	5E	Caret
95	0x5F	137	01011111	_	_	U+005F	5F	Underscore
96	0x60	140	01100000	`	`	U+0060	60	Grave accent (backtick)
97	0x61	141	01100001	a	a	U+0061	61	Lowercase a
98	0x62	142	01100010	b	b	U+0062	62	Lowercase b
99	0x63	143	01100011	c	c	U+0063	63	Lowercase c
100	0x64	144	01100100	d	d	U+0064	64	Lowercase d
101	0x65	145	01100101	e	e	U+0065	65	Lowercase e
102	0x66	146	01100110	f	f	U+0066	66	Lowercase f
103	0x67	147	01100111	g	g	U+0067	67	Lowercase g
104	0x68	150	01101000	h	h	U+0068	68	Lowercase h
105	0x69	151	01101001	i	i	U+0069	69	Lowercase i
106	0x6A	152	01101010	j	j	U+006A	6A	Lowercase j
107	0x6B	153	01101011	k	k	U+006B	6B	Lowercase k
108	0x6C	154	01101100	l	l	U+006C	6C	Lowercase l
109	0x6D	155	01101101	m	m	U+006D	6D	Lowercase m
110	0x6E	156	01101110	n	n	U+006E	6E	Lowercase n
111	0x6F	157	01101111	o	o	U+006F	6F	Lowercase o
112	0x70	160	01110000	p	p	U+0070	70	Lowercase p
113	0x71	161	01110001	q	q	U+0071	71	Lowercase q
114	0x72	162	01110010	r	r	U+0072	72	Lowercase r
115	0x73	163	01110011	s	s	U+0073	73	Lowercase s
116	0x74	164	01110100	t	t	U+0074	74	Lowercase t
117	0x75	165	01110101	u	u	U+0075	75	Lowercase u
118	0x76	166	01110110	v	v	U+0076	76	Lowercase v
119	0x77	167	01110111	w	w	U+0077	77	Lowercase w
120	0x78	170	01111000	x	x	U+0078	78	Lowercase x
121	0x79	171	01111001	y	y	U+0079	79	Lowercase y
122	0x7A	172	01111010	z	z	U+007A	7A	Lowercase z
123	0x7B	173	01111011	{	{	U+007B	7B	Left curly brace
124	0x7C	174	01111100	\|	\|	U+007C	7C	Vertical bar (pipe)
125	0x7D	175	01111101	}	}	U+007D	7D	Right curly brace
126	0x7E	176	01111110	~	~	U+007E	7E	Tilde
127	0x7F	177	01111111	·	n/a	U+007F	7F	DEL, Delete

Text to ASCII codes and back

Text

Output as

72 101 108 108 111

Codes (decimal, 0x hex or 8-bit binary, separated by spaces)

Text

Hello

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How to use

Pick a range, filter or search

Choose Standard ASCII 0-127, Extended 128-255 or All 0-255, and a character set for the extended codes. Then press a filter such as Digits 0-9, or search for 65, 0x41, A or euro.

Read and copy the codes

Each row gives the decimal, hex, octal and binary values, the character, its HTML entity, Unicode code point, UTF-8 bytes and name. Press Copy next to the decimal or hex value.

Convert or download

Type text in the converter to get its codes in decimal, hex, binary or octal, or paste codes to get text. Press CSV or Printable PNG chart to save the table you are viewing.

Why ASCII Table

All 128 codes in decimal, hex, octal and binary, with HTML entities, Unicode and UTF-8 bytes.
Extended 128 to 255 in Windows-1252 or ISO-8859-1, with the differences explained.
A text to code converter that works both ways.
Download the current view as CSV or a printable PNG chart.

ASCII ranges at a glance

The 128 ASCII codes fall into a few blocks, and the layout is deliberate. Digits start at 48, so the low four bits of each digit equal its value. Uppercase and lowercase letters are exactly 32 apart. Punctuation fills the gaps between the blocks.

Knowing the blocks helps when reading a hex dump: bytes from 0x20 to 0x7E are printable text, and anything below 0x20 is a control code.

Decimal	Hex	Contents
0 to 31	0x00 to 0x1F	Control characters, including tab (9), LF (10), CR (13) and ESC (27)
32	0x20	Space
33 to 47	0x21 to 0x2F	! " # $ % & ' ( ) * + , - . /
48 to 57	0x30 to 0x39	Digits 0 to 9
58 to 64	0x3A to 0x40	: ; < = > ? @
65 to 90	0x41 to 0x5A	Uppercase A to Z
91 to 96	0x5B to 0x60	[ \ ] ^ _ `
97 to 122	0x61 to 0x7A	Lowercase a to z
123 to 126	0x7B to 0x7E	{ \| } ~
127	0x7F	DEL, a control character

Extended codes: Windows-1252 vs ISO-8859-1

Codes 128 to 255 were used by many 8-bit character sets. The two most common on the web look alike from 160 up, and differ in the block from 128 to 159.

Text marked as ISO-8859-1 is usually decoded as Windows-1252 by browsers, which is why curly quotes and the euro sign still show up. In UTF-8 these characters take two or three bytes, which the UTF-8 column shows. When é appears as Ã©, UTF-8 bytes were read as one of these 8-bit sets.

Code	Windows-1252	ISO-8859-1
128 (0x80)	€ euro sign	Control code PAD
145 to 148	‘ ’ “ ” curly quotes	Control codes
150, 151	En dash and em dash	Control codes
153 (0x99)	™ trade mark	Control code SGCI
160 to 255	Same as Unicode U+00A0 to U+00FF	Same as Unicode U+00A0 to U+00FF

Common questions

Why is A 65 but a 97 in the ASCII table?

Uppercase A to Z sit at 65 to 90 and lowercase a to z at 97 to 122, exactly 32 apart. In binary that gap is a single bit (0x20), so switching case means flipping one bit, which made case conversion cheap on early hardware.

What is the ASCII code for a space, a tab and a newline?

Space is 32 (0x20), tab is 9 (0x09), line feed is 10 (0x0A) and carriage return is 13 (0x0D). Unix and macOS end lines with LF, while Windows uses CR followed by LF.

Which ASCII codes are control characters?

Codes 0 to 31 and 127 are control characters. They were designed to control teleprinters and do not print anything. A few are still common: tab, line feed, carriage return, escape (27) for terminal colors, and NUL (0) as the string terminator in C.

What are the ASCII codes for the digits 0 to 9?

The digits run from 48 to 57, or 0x30 to 0x39. Subtracting 48 from a digit's code gives its numeric value, which is how many parsers convert text to numbers.

Does this ASCII table cover extended codes 128 to 255?

Yes, as an option. ASCII itself stops at 127, so codes 128 to 255 depend on the character set. Pick Extended 128-255 and choose Windows-1252, where 128 is the euro sign, or ISO-8859-1, where 128 to 159 are control codes. From 160 to 255 both sets match Unicode.

How do I write an ASCII character as an HTML entity?

Use &# followed by the decimal code and a semicolon, such as A for A, or &#x followed by the hex code, such as A. The characters &, <, >, " and ' also have named entities: &, <, >, " and '.

What is the difference between ASCII and Unicode?

Unicode includes ASCII as its first 128 code points, U+0000 to U+007F, and adds characters for almost every writing system. In UTF-8, those first 128 characters are stored as single bytes identical to ASCII, so plain ASCII text is also valid UTF-8.

Can I download a printable ASCII chart?

Press Printable PNG chart to download a 16-column chart of the codes you are viewing, with each character, its decimal and its hex value, ready to print. Press CSV to open the full table in a spreadsheet. Your browser's print dialog can also save the page as a PDF.

What's the difference between CR and LF in the ASCII table?

CR (13) moved a printer's carriage back to the start of the line, and LF (10) advanced the paper one line. Text files still use them as line endings: LF alone on Unix and macOS, CR and LF together on Windows.

How do I convert text to ASCII codes?

Type or paste text into the Text box under the table. The codes appear below it, separated by spaces, in decimal, hex, binary or octal. The Codes box works the other way: paste numbers such as 72 101 108 108 111, or 0x48 hex and 8-bit binary, and read the text.

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