ASCII Converter

Convert text to ASCII codes in decimal, hex, binary or octal – and decode them back. Handles emoji and accents with Unicode code points or UTF-8 bytes, and reveals hidden characters.

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Format Encoding Separator

Pad with zeros Prefix (0x, 0b, 0o) Uppercase hex

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How to convert text to ASCII

Choose a directionText → Codes turns characters into numbers. Codes → Text reads numbers back into text.
Pick the formatDecimal, hex, binary, octal, U+ code points, \u escapes or HTML entities. For emoji and accented letters, choose code points or UTF-8 bytes.
Copy or inspectCopy the result, or check the table to see every character with its codes. Invisible characters are highlighted.

ASCII table (0–127)

The full ASCII chart with decimal, hex, binary and octal codes. Codes 0–31 and 127 are control characters; 32–126 are printable. Handy ranges: digits 0–9 are 48–57, A–Z are 65–90 and a–z are 97–122 – a lowercase letter is its capital plus 32.

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

Frequently asked questions

What is ASCII?

ASCII is a 1963 standard that gives each of 128 characters a number from 0 to 127: A is 65, a is 97, 0 is 48 and a space is 32. Codes 0–31 and 127 are invisible control characters such as tab (9) and line feed (10). Every modern encoding, including UTF-8, keeps these same numbers.

What happens with characters outside ASCII, like é, ₹ or emoji?

They have no ASCII code. The tool shows their Unicode code point instead (₹ is 8377, U+20B9), or their UTF-8 bytes if you choose that option (₹ is E2 82 B9). The table marks every non-ASCII character.

Code points or UTF-8 bytes – which should I use?

Code points identify characters and are what you use in HTML entities or programming escapes. UTF-8 bytes are what is actually stored in a file or sent in a URL – use them when debugging files, network data or percent-encoding.

How does decoding detect the format?

Prefixes such as 0x, 0b, U+, \u and &# are always understood. For plain numbers, groups of 0s and 1s of 8 digits are read as binary, any letter A–F means hex, and otherwise decimal. You can override the detection. A run like 48656C6C6F without spaces is split into bytes.

How do I find hidden characters in text?

Paste the text in Text → Codes mode. Zero-width spaces, non-breaking spaces, byte order marks and control characters are highlighted in the table, with their names – a common cause of failing passwords, broken CSV imports and “identical” strings that don’t match.

Is extended ASCII (128–255) supported?

Yes, as Unicode code points 128–255, which match the Latin-1 (ISO 8859-1) characters. Windows-1252 differs for 128–159, where it has characters like € and curly quotes.

Is my text uploaded?

No. Conversion happens in your browser.

Last updated: 13 October 2026

ASCII Converter

Character by character

How to convert text to ASCII

ASCII table (0–127)

Frequently asked questions

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