ASCII to binary converter

Type ASCII text and get each character as an 8-bit binary byte, ready to paste into homework, code or a puzzle.

Text6 chars · 6 bytes

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Binary48 bits

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Printable ASCII in binary (32–126)

Char	Binary	Dec
space	00100000	32
!	00100001	33
"	00100010	34
#	00100011	35
$	00100100	36
%	00100101	37
&	00100110	38
'	00100111	39
(	00101000	40
)	00101001	41
*	00101010	42
+	00101011	43
,	00101100	44
-	00101101	45
.	00101110	46
/	00101111	47
0	00110000	48
1	00110001	49
2	00110010	50
3	00110011	51
4	00110100	52
5	00110101	53
6	00110110	54
7	00110111	55
8	00111000	56
9	00111001	57
:	00111010	58
;	00111011	59
<	00111100	60
=	00111101	61
>	00111110	62
?	00111111	63

Char	Binary	Dec
@	01000000	64
A	01000001	65
B	01000010	66
C	01000011	67
D	01000100	68
E	01000101	69
F	01000110	70
G	01000111	71
H	01001000	72
I	01001001	73
J	01001010	74
K	01001011	75
L	01001100	76
M	01001101	77
N	01001110	78
O	01001111	79
P	01010000	80
Q	01010001	81
R	01010010	82
S	01010011	83
T	01010100	84
U	01010101	85
V	01010110	86
W	01010111	87
X	01011000	88
Y	01011001	89
Z	01011010	90
[	01011011	91
\	01011100	92
]	01011101	93
^	01011110	94
_	01011111	95

Char	Binary	Dec
`	01100000	96
a	01100001	97
b	01100010	98
c	01100011	99
d	01100100	100
e	01100101	101
f	01100110	102
g	01100111	103
h	01101000	104
i	01101001	105
j	01101010	106
k	01101011	107
l	01101100	108
m	01101101	109
n	01101110	110
o	01101111	111
p	01110000	112
q	01110001	113
r	01110010	114
s	01110011	115
t	01110100	116
u	01110101	117
v	01110110	118
w	01110111	119
x	01111000	120
y	01111001	121
z	01111010	122
{	01111011	123
\|	01111100	124
}	01111101	125
~	01111110	126

Control codes 0–31 and 127 are in the full ASCII table.

ASCII vs. UTF-8

ASCII defines 128 characters. UTF-8 keeps those same 128 byte values and adds multi-byte sequences for everything else, so for plain English text the two give identical binary. This page defaults to ASCII and tells you when a character falls outside it; the encoding menu switches to UTF-8, UTF-16 or Windows-1252 when you need them. For the general tool see text to binary.

Related: Hex to ASCII · ASCII to hex · Binary to ASCII

Questions people ask

How do I convert ASCII to binary?

Look up each character’s ASCII code and write it in base 2 using 8 digits. “B” = 66 = 64 + 2 = 01000010.

What is “hi” in binary?

01101000 01101001.

Why do all ASCII bytes start with 0?

ASCII codes go up to 127, which needs only 7 bits, so the eighth (leftmost) bit of every ASCII byte is 0.

How do I write a name in binary?

Type it in the box above. Uppercase letters start 010, lowercase 011, and the last five bits count the letter’s position in the alphabet. See the binary alphabet.