Text to Binary Converter

Type a word or sentence and get its binary code, one 8-bit group per byte. Switch the action to turn binary, hex, octal or decimal byte values back into text.

Runs in your browserFree, no sign-upLast reviewed October 8, 2026

Encoded

01001000 01100101 01101100 01101100 01101111

Details

Characters: 5
Bytes: 5
Base: Base 2

Quick answers

What is hello in binary?: Lowercase hello is 01101000 01100101 01101100 01101100 01101111. With a capital H, Hello is 01001000 01100101 01101100 01101100 01101111. Only the first group differs, because a capital letter and its lowercase form are 32 apart.
How do I convert text to binary?: Look up each character's ASCII number, then write that number in base 2 using eight digits. H is 72, and 72 is 64 + 8, so H is 01001000. Repeat for every character, including spaces (00100000), and separate the groups with spaces.
What is the letter A in binary?: Capital A is 01000001, which is 65 in decimal and 41 in hexadecimal. Lowercase a is 01100001, which is 97 in decimal and 61 in hexadecimal.
How do you write no in binary code?: Lowercase no is 01101110 01101111. Capitalized No is 01001110 01101111, and NO in capitals is 01001110 01001111. The word yes is 01111001 01100101 01110011.
What is dad in binary code?: Lowercase dad is 01100100 01100001 01100100. With a capital D, Dad is 01000100 01100001 01100100, and DAD in capitals is 01000100 01000001 01000100.
How many bits is one letter?: An English letter, digit or common punctuation mark is 8 bits, which is 1 byte. In UTF-8, accented Latin letters such as é take 16 bits, the euro sign takes 24 bits and most emoji take 32 bits.

What Text to Binary Converter does

Type any text and the converter writes out each byte as eight binary digits separated by spaces. Hello becomes 01001000 01100101 01101100 01101100 01101111. Plain English letters, digits and punctuation are one byte each, so one character gives one 8-bit group; text is encoded as UTF-8, so an accented letter gives two groups and an emoji gives four. The Number base menu shows the same bytes in octal, decimal or hexadecimal instead, and the Code → text action reverses the process: paste space-separated or comma-separated byte values and read the decoded words.

Binary alphabet chart: letters A to Z in binary, decimal and hex

Every value below is the converter's own output for that single letter.

Upper	Binary	Decimal	Hex	Lower	Binary	Decimal	Hex
A	01000001	65	41	a	01100001	97	61
B	01000010	66	42	b	01100010	98	62
C	01000011	67	43	c	01100011	99	63
D	01000100	68	44	d	01100100	100	64
E	01000101	69	45	e	01100101	101	65
F	01000110	70	46	f	01100110	102	66
G	01000111	71	47	g	01100111	103	67
H	01001000	72	48	h	01101000	104	68
I	01001001	73	49	i	01101001	105	69
J	01001010	74	4a	j	01101010	106	6a
K	01001011	75	4b	k	01101011	107	6b
L	01001100	76	4c	l	01101100	108	6c
M	01001101	77	4d	m	01101101	109	6d
N	01001110	78	4e	n	01101110	110	6e
O	01001111	79	4f	o	01101111	111	6f
P	01010000	80	50	p	01110000	112	70
Q	01010001	81	51	q	01110001	113	71
R	01010010	82	52	r	01110010	114	72
S	01010011	83	53	s	01110011	115	73
T	01010100	84	54	t	01110100	116	74
U	01010101	85	55	u	01110101	117	75
V	01010110	86	56	v	01110110	118	76
W	01010111	87	57	w	01110111	119	77
X	01011000	88	58	x	01111000	120	78
Y	01011001	89	59	y	01111001	121	79
Z	01011010	90	5a	z	01111010	122	7a

Capital letters all start 010 and lowercase letters all start 011. The last five bits give the letter's position in the alphabet: A is 00001, B is 00010, Z is 11010.

Digits, space and punctuation in binary

A typed digit is stored as a character, not as the number itself, so the character 5 is 00110101 rather than 101.

Character	Binary	Decimal	Hex
Space	00100000	32	20
Line break	00001010	10	0a
0	00110000	48	30
1	00110001	49	31
2	00110010	50	32
3	00110011	51	33
4	00110100	52	34
5	00110101	53	35
6	00110110	54	36
7	00110111	55	37
8	00111000	56	38
9	00111001	57	39
Period .	00101110	46	2e
Comma ,	00101100	44	2c
Exclamation mark !	00100001	33	21
Question mark ?	00111111	63	3f
Apostrophe '	00100111	39	27
Hyphen -	00101101	45	2d
At sign @	01000000	64	40
Hash #	00100011	35	23
Ampersand &	00100110	38	26

To convert a number's value between bases (for example 255 to 11111111), use the number base converter instead; this page converts characters.

Common words and phrases converted to binary

hi

01101000 01101001

yes

01111001 01100101 01110011

ok

01101111 01101011

love

01101100 01101111 01110110 01100101

mom

01101101 01101111 01101101

I love you

01001001 00100000 01101100 01101111 01110110 01100101 00100000 01111001 01101111 01110101

Ten bytes: eight letters plus two spaces, each space being 00100000.

Hello World

01001000 01100101 01101100 01101100 01101111 00100000 01010111 01101111 01110010 01101100 01100100

The same word in other bases

Hello with Number base set to Octal, Decimal, then Hexadecimal

110 145 154 154 157 in octal, 72 101 108 108 111 in decimal, 48 65 6c 6c 6f in hexadecimal

How to convert a letter to binary by hand

character -> ASCII number -> sum of place values 128, 64, 32, 16, 8, 4, 2, 1

Start with the letter's ASCII number from the chart, for example H = 72. Work through the eight place values from left to right, writing 1 if the value fits into what is left and 0 if it does not. 128 does not fit (0). 64 fits, leaving 8 (1). 32 and 16 do not fit (0, 0). 8 fits, leaving 0 (1). 4, 2 and 1 do not fit (0, 0, 0). Reading the digits in order gives 01001000. Going the other way, add the place values that have a 1 under them: 01101001 is 64 + 32 + 8 + 1 = 105, which is the letter i.

Characters that need more than 8 bits

The converter uses UTF-8, the encoding used by almost all web pages and modern files. Compare the Characters and Bytes figures in the Details panel to spot these.

Character	Bytes	Binary output
A	1	01000001
é	2	11000011 10101001
ñ	2	11000011 10110001
€	3	11100010 10000010 10101100
😀	4	11110000 10011111 10011000 10000000

The first byte of a multi-byte character starts with 110, 1110 or 11110 to signal two, three or four bytes, and every following byte starts with 10. Decoding only part of such a sequence, for example 11000011 alone, gives a replacement character.

Binary to text: what the decoder accepts and rejects

Bytes must be separated by spaces, commas or line breaks. 01001000 01101001, or the same two groups on separate lines, decodes to Hi.
Leading zeros are optional: 1001000 1100101 1101100 1101100 1101111 decodes to Hello.
An unbroken run such as 0100100001100101 is rejected, because the tool does not split it into groups of eight for you. Insert a space after every eighth digit first.
Each value must be between 0 and 255 in the selected base. In decimal, 256 produces the message "256" is not a valid base-10 byte value.
The Number base must match the input. Binary groups read as decimal are rejected or produce the wrong letters.
A stray character inside a group is not always reported. Each value is read up to the first character that does not belong to the base, so 0110100x is read as 0110100 and 01001002 as 0100100, and the decoded letter is wrong. An error appears only when a group has no valid leading digit or is above 255.
Hexadecimal input can be upper or lower case and may carry a 0x prefix: 4A 4B decodes to JK. A joined string such as 48656c6c6f needs spaces between each pair.

Step by step

1
Type or paste your text into the Input box. It opens with Hello as a sample.
2
Leave Action on Text → code to turn text into numbers, or choose Code → text to decode.
3
Pick a Number base: Binary (base 2), Octal (base 8), Decimal (base 10) or Hexadecimal (base 16).
4
Read the Encoded panel and copy it. The Details panel shows Characters, Bytes and the Base.
5
When decoding, separate every byte with a space, comma or line break and make sure Number base matches the values you pasted.

Answers to common questions

Is binary code the same as ASCII?

No. ASCII is a table that gives each of 128 characters a number from 0 to 127. Binary is a way of writing numbers using only 0 and 1. Text in binary is simply those ASCII numbers written in base 2. For the ASCII range, UTF-8 produces exactly the same bytes.

Why do capital and lowercase letters have different binary codes?

They are different characters with different numbers. Each lowercase letter is exactly 32 higher than its capital, which flips one bit: A is 01000001 and a is 01100001. That is why changing the case of a word changes its binary.

Can I convert a whole sentence or paragraph to binary?

Yes. Paste any amount of text and every byte is converted, including spaces, punctuation and line breaks. A space becomes 00100000 and a line break becomes 00001010, so the output can be decoded back to exactly the same text.

Can I get binary output without spaces or with a different separator?

Not directly. The output always puts one space between bytes, and there is no option for commas or no separator. Copy the result and remove the spaces in a text editor if you need a continuous string.

Why did my binary decode to the wrong text?

The usual causes are a missing or extra digit in one group, a mistyped character that cut a group short, the wrong Number base, or binary produced with a different encoding such as UTF-16. Check that every group has exactly eight digits, all of them 0 or 1, with a space between groups.

How do I convert a hex string to text?

Set Action to Code → text and Number base to Hexadecimal, then paste the bytes with a space between each pair. 48 65 6c 6c 6f decodes to Hello. The same works for octal (110 145 154 154 157) and decimal (72, 101, 108, 108, 111).

Does the converter support 7-bit ASCII or UTF-16 output?

No. Output is always UTF-8 bytes padded to eight binary digits, two hex digits or three octal digits; decimal values are not padded. For plain English text, seven-bit ASCII is the same as the output here with the leading 0 removed from each group.

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Settings

Quick answers

What Text to Binary Converter does

Binary alphabet chart: letters A to Z in binary, decimal and hex

Digits, space and punctuation in binary

Common words and phrases converted to binary

hi

yes

ok

love

mom

I love you

Hello World

The same word in other bases

How to convert a letter to binary by hand

Characters that need more than 8 bits

Binary to text: what the decoder accepts and rejects

Step by step

Answers to common questions

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