Text to hex converter

Turn text into hexadecimal bytes in the format your code expects: spaced pairs, a continuous string, 0x arrays, \x escapes or percent-encoding.

Uppercase

Text7 chars · 10 bytes

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Hex

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Why hex, not binary?

Every hex digit is exactly four bits, so a byte is always two hex digits. It's compact enough to read and still maps one-to-one onto the underlying bits, which is why hex editors, network captures, colour codes (#7F3FBF) and memory addresses all use it.

The example above shows the difference between ASCII and UTF-8: “Caf” and “5” are one byte each, “é” is two bytes (C3 A9) and “€” is three (E2 82 AC). To look up any single code point with its UTF-8 and UTF-16 forms, use the Unicode converter.

Text to hex chart (printable ASCII)

Char	Hex	Dec
space	20	32
!	21	33
"	22	34
#	23	35
$	24	36
%	25	37
&	26	38
'	27	39
(	28	40
)	29	41
*	2A	42
+	2B	43
,	2C	44
-	2D	45
.	2E	46
/	2F	47
0	30	48
1	31	49
2	32	50
3	33	51
4	34	52
5	35	53
6	36	54
7	37	55
8	38	56
9	39	57
:	3A	58
;	3B	59
<	3C	60
=	3D	61
>	3E	62
?	3F	63

Char	Hex	Dec
@	40	64
A	41	65
B	42	66
C	43	67
D	44	68
E	45	69
F	46	70
G	47	71
H	48	72
I	49	73
J	4A	74
K	4B	75
L	4C	76
M	4D	77
N	4E	78
O	4F	79
P	50	80
Q	51	81
R	52	82
S	53	83
T	54	84
U	55	85
V	56	86
W	57	87
X	58	88
Y	59	89
Z	5A	90
[	5B	91
\	5C	92
]	5D	93
^	5E	94
_	5F	95

Char	Hex	Dec
`	60	96
a	61	97
b	62	98
c	63	99
d	64	100
e	65	101
f	66	102
g	67	103
h	68	104
i	69	105
j	6A	106
k	6B	107
l	6C	108
m	6D	109
n	6E	110
o	6F	111
p	70	112
q	71	113
r	72	114
s	73	115
t	74	116
u	75	117
v	76	118
w	77	119
x	78	120
y	79	121
z	7A	122
{	7B	123
\|	7C	124
}	7D	125
~	7E	126

Questions people ask

How do I convert text to hex?

Encode each character as UTF-8 bytes, then write each byte as two hexadecimal digits. “A” is byte 65, which is 41 in hex.

How do I convert ASCII to hex?

The same way: ASCII characters are single bytes, so each becomes exactly two hex digits. “Hi” = 48 69.

Which output style should I use?

Spaced pairs are easiest to read. Use 0x48, 0x65 for C/C++/JavaScript arrays, \x48 for string literals in C, Python and shell, and %48 for URLs.

Why are some characters more than two hex digits?

Characters outside ASCII take 2–4 UTF-8 bytes. “é” is C3 A9 and “€” is E2 82 AC.

Char	Hex	Dec
@	40	64
A	41	65
B	42	66
C	43	67
D	44	68
E	45	69
F	46	70
G	47	71
H	48	72
I	49	73
J	4A	74
K	4B	75
L	4C	76
M	4D	77
N	4E	78
O	4F	79
P	50	80
Q	51	81
R	52	82
S	53	83
T	54	84
U	55	85
V	56	86
W	57	87
X	58	88
Y	59	89
Z	5A	90
[	5B	91
\	5C	92
]	5D	93
^	5E	94
_	5F	95

Char	Hex	Dec
`	60	96
a	61	97
b	62	98
c	63	99
d	64	100
e	65	101
f	66	102
g	67	103
h	68	104
i	69	105
j	6A	106
k	6B	107
l	6C	108
m	6D	109
n	6E	110
o	6F	111
p	70	112
q	71	113
r	72	114
s	73	115
t	74	116
u	75	117
v	76	118
w	77	119
x	78	120
y	79	121
z	7A	122
{	7B	123
\|	7C	124
}	7D	125
~	7E	126

Char	Hex	Dec
@	40	64
A	41	65
B	42	66
C	43	67
D	44	68
E	45	69
F	46	70
G	47	71
H	48	72
I	49	73
J	4A	74
K	4B	75
L	4C	76
M	4D	77
N	4E	78
O	4F	79
P	50	80
Q	51	81
R	52	82
S	53	83
T	54	84
U	55	85
V	56	86
W	57	87
X	58	88
Y	59	89
Z	5A	90
[	5B	91
\	5C	92
]	5D	93
^	5E	94
_	5F	95

Char	Hex	Dec
`	60	96
a	61	97
b	62	98
c	63	99
d	64	100
e	65	101
f	66	102
g	67	103
h	68	104
i	69	105
j	6A	106
k	6B	107
l	6C	108
m	6D	109
n	6E	110
o	6F	111
p	70	112
q	71	113
r	72	114
s	73	115
t	74	116
u	75	117
v	76	118
w	77	119
x	78	120
y	79	121
z	7A	122
{	7B	123
\|	7C	124
}	7D	125
~	7E	126

Char	Hex	Dec
@	40	64
A	41	65
B	42	66
C	43	67
D	44	68
E	45	69
F	46	70
G	47	71
H	48	72
I	49	73
J	4A	74
K	4B	75
L	4C	76
M	4D	77
N	4E	78
O	4F	79
P	50	80
Q	51	81
R	52	82
S	53	83
T	54	84
U	55	85
V	56	86
W	57	87
X	58	88
Y	59	89
Z	5A	90
[	5B	91
\	5C	92
]	5D	93
^	5E	94
_	5F	95

Char	Hex	Dec
`	60	96
a	61	97
b	62	98
c	63	99
d	64	100
e	65	101
f	66	102
g	67	103
h	68	104
i	69	105
j	6A	106
k	6B	107
l	6C	108
m	6D	109
n	6E	110
o	6F	111
p	70	112
q	71	113
r	72	114
s	73	115
t	74	116
u	75	117
v	76	118
w	77	119
x	78	120
y	79	121
z	7A	122
{	7B	123
\|	7C	124
}	7D	125
~	7E	126