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Standard ASCII characters convert cleanly; multi-byte Unicode characters are encoded using their UTF-8 byte sequence.

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ASCII / HEX Converter

Convert text to its hexadecimal byte representation, or decode hex back into readable ASCII text.

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Interactive workspace

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ASCII / HEX Converter

Character encodingDelimiter Uppercase hex 0x prefix (C-style)

Load from .txt file

9 characters · 9 bytes in UTF-8. Characters the encoding cannot represent become ? when encoding.

53 69 74 65 49 6e 64 65 78

Per-character breakdown

Char	Decimal	Hex	Binary
S	83	53	01010011
i	105	69	01101001
t	116	74	01110100
e	101	65	01100101
I	73	49	01001001
n	110	6E	01101110
d	100	64	01100100
e	101	65	01100101
x	120	78	01111000

ASCII reference table (0–127)

Decimal	Hex	Binary	Char	Name
0	00	00000000		NUL
1	01	00000001		SOH
2	02	00000010		STX
3	03	00000011		ETX
4	04	00000100		EOT
5	05	00000101		ENQ
6	06	00000110		ACK
7	07	00000111		BEL
8	08	00001000		BS
9	09	00001001		HT
10	0A	00001010		LF
11	0B	00001011		VT
12	0C	00001100		FF
13	0D	00001101		CR
14	0E	00001110		SO
15	0F	00001111		SI
16	10	00010000		DLE
17	11	00010001		DC1
18	12	00010010		DC2
19	13	00010011		DC3
20	14	00010100		DC4
21	15	00010101		NAK
22	16	00010110		SYN
23	17	00010111		ETB
24	18	00011000		CAN
25	19	00011001		EM
26	1A	00011010		SUB
27	1B	00011011		ESC
28	1C	00011100		FS
29	1D	00011101		GS
30	1E	00011110		RS
31	1F	00011111		US
32	20	00100000	␣	Space
33	21	00100001	!
34	22	00100010	"
35	23	00100011	#
36	24	00100100	$
37	25	00100101	%
38	26	00100110	&
39	27	00100111	'
40	28	00101000	(
41	29	00101001	)
42	2A	00101010	*
43	2B	00101011	+
44	2C	00101100	,
45	2D	00101101	-
46	2E	00101110	.
47	2F	00101111	/
48	30	00110000	0
49	31	00110001	1
50	32	00110010	2
51	33	00110011	3
52	34	00110100	4
53	35	00110101	5
54	36	00110110	6
55	37	00110111	7
56	38	00111000	8
57	39	00111001	9
58	3A	00111010	:
59	3B	00111011	;
60	3C	00111100	<
61	3D	00111101	=
62	3E	00111110	>
63	3F	00111111	?
64	40	01000000	@
65	41	01000001	A
66	42	01000010	B
67	43	01000011	C
68	44	01000100	D
69	45	01000101	E
70	46	01000110	F
71	47	01000111	G
72	48	01001000	H
73	49	01001001	I
74	4A	01001010	J
75	4B	01001011	K
76	4C	01001100	L
77	4D	01001101	M
78	4E	01001110	N
79	4F	01001111	O
80	50	01010000	P
81	51	01010001	Q
82	52	01010010	R
83	53	01010011	S
84	54	01010100	T
85	55	01010101	U
86	56	01010110	V
87	57	01010111	W
88	58	01011000	X
89	59	01011001	Y
90	5A	01011010	Z
91	5B	01011011	[
92	5C	01011100	\
93	5D	01011101	]
94	5E	01011110	^
95	5F	01011111	_
96	60	01100000	`
97	61	01100001	a
98	62	01100010	b
99	63	01100011	c
100	64	01100100	d
101	65	01100101	e
102	66	01100110	f
103	67	01100111	g
104	68	01101000	h
105	69	01101001	i
106	6A	01101010	j
107	6B	01101011	k
108	6C	01101100	l
109	6D	01101101	m
110	6E	01101110	n
111	6F	01101111	o
112	70	01110000	p
113	71	01110001	q
114	72	01110010	r
115	73	01110011	s
116	74	01110100	t
117	75	01110101	u
118	76	01110110	v
119	77	01110111	w
120	78	01111000	x
121	79	01111001	y
122	7A	01111010	z
123	7B	01111011	{
124	7C	01111100	\|
125	7D	01111101	}
126	7E	01111110	~
127	7F	01111111		DEL

How to use it

Choose text-to-hex or hex-to-text mode.
Enter text or hexadecimal pairs as requested by the interface.
Review the output and any malformed-byte error; compare non-ASCII examples carefully.

What is ASCII / HEX Converter?

Convert text to its hexadecimal byte representation, or decode hex back into readable ASCII text.

How it works

SiteIndex reads each character's byte value and renders it as two-digit hexadecimal, or parses hex pairs back into their ASCII characters, with instant two-way conversion.

Common uses

Inspect the raw byte values behind a short text string.
Decode a hex-encoded value back into readable text.
Prepare byte sequences for low-level protocol or firmware work.

Limitations

This is a text helper, not a binary-file editor. Verify the implementation's encoding against the destination protocol before using non-ASCII content.

Frequently asked questions

Does this support Unicode?: Standard ASCII characters convert cleanly; multi-byte Unicode characters are encoded using their UTF-8 byte sequence.

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