Free Binary Translator

Binary Translator: text to binary, hex and ASCII

With this Binary Translator, you can convert text to binary, hex, decimal (ASCII) or octal and translate binary code or hex back to text. “Hello” becomes 01001000 01100101 01101100 01101100 01101111 (hex 48 65 6c 6c 6f). Free, no sign-up required, and right in your browser: your text never leaves your device.

Built by Dimitri Heissler

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Format

Character set

Separator

Prefix 0b

Each byte as 8 bits of zeros and ones, for example A = 01000001.

Text

Your text stays in your browser: it is neither uploaded nor saved.

Binary code

Characters in the input: 0
Characters in the result: 0
Bytes: 0
Bits: 0

Example result

What this Binary Translator shows you

Type text to instantly get its code in binary, hexadecimal, decimal, or octal, plus a list of characters and their bytes. Paste code, and the tool detects the format and displays the text. Three examples:

Example 1: Text in binary, hex, decimal, and octal

Input (text):

Hello World

The same text in four writing styles
Format	Output
Binary code	01001000 01100101 01101100 01101100 01101111 00100000 01010111 01101111 01110010 01101100 01100100
Hexadecimal	48 65 6c 6c 6f 20 57 6f 72 6c 64
Decimal numbers (ASCII codes)	72 101 108 108 111 32 87 111 114 108 100
Octal numbers	110 145 154 154 157 040 127 157 162 154 144

Result explained: The text has 11 characters and consists of 11 bytes, or 88 bits. The first character, H, becomes 01001000 (binary), 48 (hex), 72 (decimal) or 110 (octal), depending on the notation. An ASCII character is exactly one byte; other characters need multiple bytes (see example 2).

Example 2: Umlauts, euro sign, and emoji in UTF-8

Input (text):

Cheese 5 € 😀

Characters in the second example, with Unicode number and UTF-8 bytes
Characters	Unicode	Bytes	Hex	Binary
C	U+0043	1	43	01000011
h	U+0068	1	68	01101000
e	U+0065	1	65	01100101
s	U+0073	1	73	01110011
Spaces	U+0020	1	20	00100000
5	U+0035	1	35	00110101
€	U+20AC	3	E2 82 AC	11100010 10000010 10101100
😀	U+1F600	4	F0 9F 98 80	11110000 10011111 10011000 10000000

Result explained: 12 characters become 17 bytes. In UTF-8, a character takes one to four bytes depending on its Unicode code point: unaccented letters and digits take one byte, umlauts and other accented letters take two, the euro sign takes three, and an emoji takes four. That’s why the byte count exceeds the character count as soon as the text contains anything outside ASCII.

Example 3: Paste code and convert it back to text

Input (code, format detected automatically):

48 65 6c 6c 6f 20 57 6f 72 6c 64

Detected: Hexadecimal

Output (text):

Hello World

Result explained: Two hexadecimal digits make one byte: 48 becomes H, and 65 becomes e. The tool reads binary code and hex with spaces, commas, newlines or no separators at all. Decimal values need a separator, and the tool does not detect octal automatically; select the Octal format for that.

How it works

How to translate text to binary code and back

Four steps from text to code—no account, no download.

Step 1

Paste text or code

Type the text you want to convert, or paste binary code, hex or decimal values into the input field. The result appears as you type, with no button to press.

Step 2

Check direction and format

The “Detected: …” indicator shows whether the tool found text or code. Use the buttons to set the direction yourself and choose the format: Binary, Hex, Decimal (ASCII) or Octal.

Step 3

Customize output

Choose the separator between values, a prefix such as 0x, 0b or 0o, and uppercase or lowercase letters for hex. The character encoding is UTF-8, with ISO-8859-1 available for older data.

Step 4

Check and apply result

Check the character, byte and bit counts and a table showing your characters in all four notations. Copy the result or download it as a text file.

Basics

How binary code works: one byte has 8 bits

A computer stores each character as a number. It writes that number in binary using just two digits, 0 and 1. A byte has 8 such positions, each with a fixed value: 128, 64, 32, 16, 8, 4, 2, and 1.

Which bits are set for the characters H, A, and z
Characters	ASCII code	64	32	16	8	2	1	Calculation steps
H	72	1	0	0	1	0	0	64 + 8 = 72
A	65	1	0	0	0	0	1	64 + 1 = 65
z	122	1	1	1	1	1	0	64 + 32 + 16 + 8 + 2 = 122

H has the ASCII code 72. That is 64 plus 8, so the bits for 64 and 8 are set: 01001000. To convert back, add the values of all the 1 bits. Hex (two digits per byte, 48 for H) and octal (three digits, 110) express the same number more compactly.

Use cases

What you can use the Binary Translator for

Whether it’s homework, a puzzle or troubleshooting, binary, hex and ASCII are just different ways of representing the same bytes.

Learning and school

See how each letter becomes a byte of 8 bits. The place-value table from 128 to 1 and the ASCII table are useful for explaining binary code in computer science class.

Puzzles, geocaching and CTF

Paste a sequence of zeros and ones; the tool detects it and shows the text. It also reads separated groups of 7 bits and 8-bit code without separators. Invalid parts are reported with their positions.

Development and debugging

Read hex values with 0x or \x as text, check which bytes an umlaut or emoji uses in UTF-8, and switch to ISO-8859-1 for older data. The page runs in your browser, including on your smartphone, with no app required.

To convert numbers such as 10 or 255 between binary, decimal, hex and octal, use the Number Base Converter instead. Go to Number Base Converter

ASCII table

ASCII table and binary code alphabet from 0 to 127

All 128 ASCII characters with their decimal, hex, octal and binary codes. Characters 0 to 31 and 127 are control characters, such as the newline (10) and tab (9). From 32 onward come spaces, digits, punctuation and letters: A to Z starting at 65 (A = 01000001), a to z starting at 97 (a = 01100001). Accented letters such as ä are not part of ASCII.

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

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FAQ

Frequently asked questions about the Binary Translator

Quick answers about binary code, hex, ASCII, UTF-8, and this tool.

Type or paste the text above. The Binary Translator converts each character to at least one byte and displays each byte as 8 bits of zeros and ones, separated by spaces. Uppercase A becomes 01000001, lowercase a becomes 01100001. Use the buttons to select Hex, Decimal (ASCII) or Octal instead of Binary.

Paste the binary code above; the tool detects it automatically. Each group of 8 bits makes one byte. Groups can be separated by spaces, commas or newlines, or placed directly next to each other. Groups of 7 bits are also supported. If a part is invalid, its position is reported.

“Hello” is 01001000 01100101 01101100 01101100 01101111 in binary and 48 65 6c 6c 6f in hex. Some sites write bytes as 7 bits without the leading 0. The value is the same, and the tool reads this format too as long as the groups are separated. Enter your own name above to see its code immediately.

01100101 is the lowercase e. The set bits have values of 64, 32, 4 and 1, totaling 101 in decimal or 65 in hex. Paste the code above and the tool will show the letter; you can also find it in row 101 of the ASCII table.

The Binary Translator converts characters, not numbers. A single number stays as text; the tool recognizes decimal values as code only when there are at least two numbers, each no greater than 255. So “10” becomes the codes for the characters 1 and 0: 00110001 00110000. To convert a number to another base, use the Number Base Converter. Go to Number Base Converter

Paste the hex code above, such as 48 61 6c 6c 6f, 0x48 0x69 or \x48\x69. The tool recognizes hex by 0x or \x, by pairs with at least one letter from a to f, or by a long run without spaces such as 48656c6c6f that contains digits and at least one letter from a to f. If every pair contains only digits, such as 48 69, the tool treats them as decimal values: click Hex to read them as hex instead. The tool also detects pairs separated by colons or hyphens as hex if they contain a letter from a to f, such as 4a:6f. If they contain only digits, such as 48:69, it does not detect any code: click Hex and also set the direction to Code → Text; otherwise, automatic mode converts the entered text to hex. In Hex format, the tool also reads values separated by colons or hyphens.

ASCII has only 128 characters: unaccented letters, digits, punctuation and control characters, each of which fits in one byte. UTF-8 matches ASCII for these characters and uses two to four bytes for all others: ä is C3 A4, the euro sign takes three bytes, and an emoji takes four. Older systems encode ä as E4 (ISO-8859-1). A single E4 is invalid in UTF-8, so the tool warns you and offers to use ISO-8859-1.

No. The conversion runs entirely in your browser, with no uploads, logging, or storage. You can check the Network tab in your browser’s developer tools: typing does not generate any requests.

Any more questions?

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Binary Translator: text to binary, hex and ASCII

What this Binary Translator shows you

Example 1: Text in binary, hex, decimal, and octal

Example 2: Umlauts, euro sign, and emoji in UTF-8

Example 3: Paste code and convert it back to text

How to translate text to binary code and back

Paste text or code

Check direction and format

Customize output

Check and apply result

How binary code works: one byte has 8 bits

What you can use the Binary Translator for

Learning and school

Puzzles, geocaching and CTF

Development and debugging

ASCII table and binary code alphabet from 0 to 127

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Frequently asked questions about the Binary Translator

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