ASCII Hex Table

Every standard ASCII character (0-127) with its hex and decimal code — a quick reference for reading raw byte dumps.

How to Read This Table

Codes 0-31 and 127 are non-printable control characters, shown here by their standard abbreviation (like BEL for bell, or DEL for delete) since they have no visible glyph. Codes 32-126 are the printable characters — letters, digits, punctuation, and space.

Where This Table Actually Comes Up

Identifying an Unexpected Byte in Text Data

Looking up a hex byte that shows up unexpectedly in what should be plain text — like 0x0D or 0x0A appearing where you didn't expect a line ending — quickly explains what it actually is.

0x0D = CR, 0x0A = LF

Decoding a Raw Protocol or File Header

Many text-based protocols and file formats use specific control characters as delimiters or markers — recognizing them by their hex code speeds up manual protocol debugging.

0x1E (RS) as a record separator

Writing a String Literal With an Escape Code

Confirming the exact hex or decimal value behind an escape sequence like \t or \n before hardcoding it in a lower-level context that expects the raw byte value.

\t = 0x09 (TAB)

Full ASCII Table: 0-127

Character	Hex	Decimal
NUL	0x00	0
SOH	0x01	1
STX	0x02	2
ETX	0x03	3
EOT	0x04	4
ENQ	0x05	5
ACK	0x06	6
BEL	0x07	7
BS	0x08	8
TAB	0x09	9
LF	0x0A	10
VT	0x0B	11
FF	0x0C	12
CR	0x0D	13
SO	0x0E	14
SI	0x0F	15
DLE	0x10	16
DC1	0x11	17
DC2	0x12	18
DC3	0x13	19
DC4	0x14	20
NAK	0x15	21
SYN	0x16	22
ETB	0x17	23
CAN	0x18	24
EM	0x19	25
SUB	0x1A	26
ESC	0x1B	27
FS	0x1C	28
GS	0x1D	29
RS	0x1E	30
US	0x1F	31
SPACE	0x20	32
!	0x21	33
"	0x22	34
#	0x23	35
$	0x24	36
%	0x25	37
&	0x26	38
'	0x27	39
(	0x28	40
)	0x29	41
*	0x2A	42
+	0x2B	43
,	0x2C	44
-	0x2D	45
.	0x2E	46
/	0x2F	47
0	0x30	48
1	0x31	49
2	0x32	50
3	0x33	51
4	0x34	52
5	0x35	53
6	0x36	54
7	0x37	55
8	0x38	56
9	0x39	57
:	0x3A	58
;	0x3B	59
<	0x3C	60
=	0x3D	61
>	0x3E	62
?	0x3F	63
@	0x40	64
A	0x41	65
B	0x42	66
C	0x43	67
D	0x44	68
E	0x45	69
F	0x46	70
G	0x47	71
H	0x48	72
I	0x49	73
J	0x4A	74
K	0x4B	75
L	0x4C	76
M	0x4D	77
N	0x4E	78
O	0x4F	79
P	0x50	80
Q	0x51	81
R	0x52	82
S	0x53	83
T	0x54	84
U	0x55	85
V	0x56	86
W	0x57	87
X	0x58	88
Y	0x59	89
Z	0x5A	90
[	0x5B	91
\	0x5C	92
]	0x5D	93
^	0x5E	94
_	0x5F	95
`	0x60	96
a	0x61	97
b	0x62	98
c	0x63	99
d	0x64	100
e	0x65	101
f	0x66	102
g	0x67	103
h	0x68	104
i	0x69	105
j	0x6A	106
k	0x6B	107
l	0x6C	108
m	0x6D	109
n	0x6E	110
o	0x6F	111
p	0x70	112
q	0x71	113
r	0x72	114
s	0x73	115
t	0x74	116
u	0x75	117
v	0x76	118
w	0x77	119
x	0x78	120
y	0x79	121
z	0x7A	122
{	0x7B	123
\|	0x7C	124
}	0x7D	125
~	0x7E	126
DEL	0x7F	127

Limitations

Covers standard 7-bit ASCII (0-127) only — extended 8-bit character sets (128-255) vary by encoding and aren't included here.

Frequently Asked Questions

What's on this table?

Every standard 7-bit ASCII character (codes 0-127), including the non-printable control characters, alongside its hex and decimal code.

What do names like NUL, BEL, and DEL mean?

They're the standard abbreviations for ASCII's non-printable control characters — for example BEL (0x07) historically rang a physical bell, and DEL (0x7F) marks the delete character.

Why does this table stop at 127?

127 is the highest code point in standard 7-bit ASCII. Codes 128-255 belong to various 8-bit extended character sets (like Latin-1 or Windows-1252), which aren't part of the core ASCII standard and vary by encoding.

Is this the same as UTF-8?

For codes 0-127, yes — UTF-8 was specifically designed so its first 128 code points are identical to ASCII. Above 127, UTF-8 uses multi-byte sequences that this single-byte table doesn't cover.