ASCII Table with Decimal, Hex, Binary and Octal

Complete ASCII character table (0-255) with decimal, hexadecimal, octal, and binary values. Search by value or name, filter by type, click any row for full detail including HTML entity and C escape.

What Is ASCII?

ASCII, short for American Standard Code for Information Interchange, is a 7-bit character encoding that maps numbers to letters, digits, punctuation, and control signals. Standard ASCII uses values 0-127: control characters at 0-31 and 127, and printable characters at 32-126.

ASCII table formats: DEC, HEX, BIN and OCT

The same ASCII code can be written in several bases. DEC is the decimal value, HEX is hexadecimal for byte-oriented debugging, BIN shows the exact bit pattern, and OCT is octal notation used in some older tools and escape formats.

Printable ASCII characters

Printable ASCII runs from decimal 32 to 126. This range includes space, digits 0-9, uppercase A-Z, lowercase a-z, punctuation, and symbols that normally appear in source code, serial logs, and text protocols.

ASCII control characters

Control characters do not normally display as glyphs. Values such as NUL, TAB, LF, CR, ESC, and DEL are used for string termination, whitespace, line endings, terminal control, and protocol framing.

Common ASCII code examples

These common ASCII codes cover the values developers look up most often when reading hex dumps, UART logs, binary payloads, and text protocol frames.

Character	DEC	HEX	BIN	Description
NUL	0	00	00000000	Null character
LF	10	0A	00001010	Line feed
CR	13	0D	00001101	Carriage return
Space	32	20	00100000	Space character
0	48	30	00110000	Digit zero
A	65	41	01000001	Uppercase A
a	97	61	01100001	Lowercase a
DEL	127	7F	01111111	Delete

Full ASCII Table 0-127

This reference table lists the standard 7-bit ASCII codes from 0 to 127 with decimal, hexadecimal, binary and octal values.

Character	DEC	HEX	BIN	OCT	Description
NUL	0	00	00000000	000	Null character
SOH	1	01	00000001	001	Start of heading
STX	2	02	00000010	002	Start of text
ETX	3	03	00000011	003	End of text
EOT	4	04	00000100	004	End of transmission
ENQ	5	05	00000101	005	Enquiry
ACK	6	06	00000110	006	Acknowledge
BEL	7	07	00000111	007	Bell
BS	8	08	00001000	010	Backspace
HT	9	09	00001001	011	Horizontal tab
LF	10	0A	00001010	012	Line feed
VT	11	0B	00001011	013	Vertical tab
FF	12	0C	00001100	014	Form feed
CR	13	0D	00001101	015	Carriage return
SO	14	0E	00001110	016	Shift out
SI	15	0F	00001111	017	Shift in
DLE	16	10	00010000	020	Data link escape
DC1	17	11	00010001	021	Device control 1
DC2	18	12	00010010	022	Device control 2
DC3	19	13	00010011	023	Device control 3
DC4	20	14	00010100	024	Device control 4
NAK	21	15	00010101	025	Negative acknowledge
SYN	22	16	00010110	026	Synchronous idle
ETB	23	17	00010111	027	End of transmission block
CAN	24	18	00011000	030	Cancel
EM	25	19	00011001	031	End of medium
SUB	26	1A	00011010	032	Substitute
ESC	27	1B	00011011	033	Escape
FS	28	1C	00011100	034	File separator
GS	29	1D	00011101	035	Group separator
RS	30	1E	00011110	036	Record separator
US	31	1F	00011111	037	Unit separator
Space	32	20	00100000	040	Space character
!	33	21	00100001	041	Printable symbol
"	34	22	00100010	042	Printable symbol
#	35	23	00100011	043	Printable symbol
$	36	24	00100100	044	Printable symbol
%	37	25	00100101	045	Printable symbol
&	38	26	00100110	046	Printable symbol
'	39	27	00100111	047	Printable symbol
(	40	28	00101000	050	Printable symbol
)	41	29	00101001	051	Printable symbol
*	42	2A	00101010	052	Printable symbol
+	43	2B	00101011	053	Printable symbol
,	44	2C	00101100	054	Printable symbol
-	45	2D	00101101	055	Printable symbol
.	46	2E	00101110	056	Printable symbol
/	47	2F	00101111	057	Printable symbol
0	48	30	00110000	060	Digit 0
1	49	31	00110001	061	Digit 1
2	50	32	00110010	062	Digit 2
3	51	33	00110011	063	Digit 3
4	52	34	00110100	064	Digit 4
5	53	35	00110101	065	Digit 5
6	54	36	00110110	066	Digit 6
7	55	37	00110111	067	Digit 7
8	56	38	00111000	070	Digit 8
9	57	39	00111001	071	Digit 9
:	58	3A	00111010	072	Printable symbol
;	59	3B	00111011	073	Printable symbol
<	60	3C	00111100	074	Printable symbol
=	61	3D	00111101	075	Printable symbol
>	62	3E	00111110	076	Printable symbol
?	63	3F	00111111	077	Printable symbol
@	64	40	01000000	100	Printable symbol
A	65	41	01000001	101	Uppercase A
B	66	42	01000010	102	Uppercase B
C	67	43	01000011	103	Uppercase C
D	68	44	01000100	104	Uppercase D
E	69	45	01000101	105	Uppercase E
F	70	46	01000110	106	Uppercase F
G	71	47	01000111	107	Uppercase G
H	72	48	01001000	110	Uppercase H
I	73	49	01001001	111	Uppercase I
J	74	4A	01001010	112	Uppercase J
K	75	4B	01001011	113	Uppercase K
L	76	4C	01001100	114	Uppercase L
M	77	4D	01001101	115	Uppercase M
N	78	4E	01001110	116	Uppercase N
O	79	4F	01001111	117	Uppercase O
P	80	50	01010000	120	Uppercase P
Q	81	51	01010001	121	Uppercase Q
R	82	52	01010010	122	Uppercase R
S	83	53	01010011	123	Uppercase S
T	84	54	01010100	124	Uppercase T
U	85	55	01010101	125	Uppercase U
V	86	56	01010110	126	Uppercase V
W	87	57	01010111	127	Uppercase W
X	88	58	01011000	130	Uppercase X
Y	89	59	01011001	131	Uppercase Y
Z	90	5A	01011010	132	Uppercase Z
[	91	5B	01011011	133	Printable symbol
\	92	5C	01011100	134	Printable symbol
]	93	5D	01011101	135	Printable symbol
^	94	5E	01011110	136	Printable symbol
_	95	5F	01011111	137	Printable symbol
`	96	60	01100000	140	Printable symbol
a	97	61	01100001	141	Lowercase a
b	98	62	01100010	142	Lowercase b
c	99	63	01100011	143	Lowercase c
d	100	64	01100100	144	Lowercase d
e	101	65	01100101	145	Lowercase e
f	102	66	01100110	146	Lowercase f
g	103	67	01100111	147	Lowercase g
h	104	68	01101000	150	Lowercase h
i	105	69	01101001	151	Lowercase i
j	106	6A	01101010	152	Lowercase j
k	107	6B	01101011	153	Lowercase k
l	108	6C	01101100	154	Lowercase l
m	109	6D	01101101	155	Lowercase m
n	110	6E	01101110	156	Lowercase n
o	111	6F	01101111	157	Lowercase o
p	112	70	01110000	160	Lowercase p
q	113	71	01110001	161	Lowercase q
r	114	72	01110010	162	Lowercase r
s	115	73	01110011	163	Lowercase s
t	116	74	01110100	164	Lowercase t
u	117	75	01110101	165	Lowercase u
v	118	76	01110110	166	Lowercase v
w	119	77	01110111	167	Lowercase w
x	120	78	01111000	170	Lowercase x
y	121	79	01111001	171	Lowercase y
z	122	7A	01111010	172	Lowercase z
{	123	7B	01111011	173	Printable symbol
\|	124	7C	01111100	174	Printable symbol
}	125	7D	01111101	175	Printable symbol
~	126	7E	01111110	176	Printable symbol
DEL	127	7F	01111111	177	Delete

ASCII vs UTF-8

UTF-8 is a Unicode encoding, but its first 128 code points are identical to ASCII. That makes ASCII bytes valid UTF-8 bytes for common English letters, digits, punctuation, and control characters.

FAQ

What is an ASCII table?

An ASCII table is a reference chart that maps each ASCII character or control code to numeric values such as decimal, hexadecimal, binary, and octal.

What are DEC, HEX, BIN and OCT in an ASCII table?

They are different number bases for the same ASCII code: decimal, hexadecimal, binary, and octal.

What is the ASCII code for A?

Uppercase A is decimal 65, hexadecimal 41, binary 01000001, and octal 101.

What is the difference between ASCII and UTF-8?

ASCII defines the first 128 character codes. UTF-8 is a Unicode encoding that keeps those first 128 codes identical and adds multibyte encodings for many more characters.