ASCII 表

交互式 ASCII 字符参考表。查看十进制、十六进制、八进制和二进制值。按可打印字符或控制字符筛选。

Showing 128 characters

Char	Dec	Hex	Oct	Binary	Description
·	0	0x00	000	00000000	NUL (Null)
·	1	0x01	001	00000001	SOH (Start of Heading)
·	2	0x02	002	00000010	STX (Start of Text)
·	3	0x03	003	00000011	ETX (End of Text)
·	4	0x04	004	00000100	EOT (End of Transmission)
·	5	0x05	005	00000101	ENQ (Enquiry)
·	6	0x06	006	00000110	ACK (Acknowledge)
·	7	0x07	007	00000111	BEL (Bell)
·	8	0x08	010	00001000	BS (Backspace)
·	9	0x09	011	00001001	HT (Horizontal Tab)
·	10	0x0A	012	00001010	LF (Line Feed)
·	11	0x0B	013	00001011	VT (Vertical Tab)
·	12	0x0C	014	00001100	FF (Form Feed)
·	13	0x0D	015	00001101	CR (Carriage Return)
·	14	0x0E	016	00001110	SO (Shift Out)
·	15	0x0F	017	00001111	SI (Shift In)
·	16	0x10	020	00010000	DLE (Data Link Escape)
·	17	0x11	021	00010001	DC1 (Device Control 1)
·	18	0x12	022	00010010	DC2 (Device Control 2)
·	19	0x13	023	00010011	DC3 (Device Control 3)
·	20	0x14	024	00010100	DC4 (Device Control 4)
·	21	0x15	025	00010101	NAK (Negative Acknowledge)
·	22	0x16	026	00010110	SYN (Synchronous Idle)
·	23	0x17	027	00010111	ETB (End of Trans. Block)
·	24	0x18	030	00011000	CAN (Cancel)
·	25	0x19	031	00011001	EM (End of Medium)
·	26	0x1A	032	00011010	SUB (Substitute)
·	27	0x1B	033	00011011	ESC (Escape)
·	28	0x1C	034	00011100	FS (File Separator)
·	29	0x1D	035	00011101	GS (Group Separator)
·	30	0x1E	036	00011110	RS (Record Separator)
·	31	0x1F	037	00011111	US (Unit Separator)
	32	0x20	040	00100000	Character
!	33	0x21	041	00100001	Exclamation mark
"	34	0x22	042	00100010	Double quote
#	35	0x23	043	00100011	Hash/Pound
$	36	0x24	044	00100100	Dollar sign
%	37	0x25	045	00100101	Percent
&	38	0x26	046	00100110	Ampersand
'	39	0x27	047	00100111	Single quote
(	40	0x28	050	00101000	Left parenthesis
)	41	0x29	051	00101001	Right parenthesis
*	42	0x2A	052	00101010	Asterisk
+	43	0x2B	053	00101011	Plus sign
,	44	0x2C	054	00101100	Comma
-	45	0x2D	055	00101101	Hyphen/Minus
.	46	0x2E	056	00101110	Period/Dot
/	47	0x2F	057	00101111	Forward slash
0	48	0x30	060	00110000	Digit 0
1	49	0x31	061	00110001	Digit 1
2	50	0x32	062	00110010	Digit 2
3	51	0x33	063	00110011	Digit 3
4	52	0x34	064	00110100	Digit 4
5	53	0x35	065	00110101	Digit 5
6	54	0x36	066	00110110	Digit 6
7	55	0x37	067	00110111	Digit 7
8	56	0x38	070	00111000	Digit 8
9	57	0x39	071	00111001	Digit 9
:	58	0x3A	072	00111010	Colon
;	59	0x3B	073	00111011	Semicolon
<	60	0x3C	074	00111100	Less than
=	61	0x3D	075	00111101	Equals sign
>	62	0x3E	076	00111110	Greater than
?	63	0x3F	077	00111111	Question mark
@	64	0x40	100	01000000	At sign
A	65	0x41	101	01000001	Uppercase A
B	66	0x42	102	01000010	Uppercase B
C	67	0x43	103	01000011	Uppercase C
D	68	0x44	104	01000100	Uppercase D
E	69	0x45	105	01000101	Uppercase E
F	70	0x46	106	01000110	Uppercase F
G	71	0x47	107	01000111	Uppercase G
H	72	0x48	110	01001000	Uppercase H
I	73	0x49	111	01001001	Uppercase I
J	74	0x4A	112	01001010	Uppercase J
K	75	0x4B	113	01001011	Uppercase K
L	76	0x4C	114	01001100	Uppercase L
M	77	0x4D	115	01001101	Uppercase M
N	78	0x4E	116	01001110	Uppercase N
O	79	0x4F	117	01001111	Uppercase O
P	80	0x50	120	01010000	Uppercase P
Q	81	0x51	121	01010001	Uppercase Q
R	82	0x52	122	01010010	Uppercase R
S	83	0x53	123	01010011	Uppercase S
T	84	0x54	124	01010100	Uppercase T
U	85	0x55	125	01010101	Uppercase U
V	86	0x56	126	01010110	Uppercase V
W	87	0x57	127	01010111	Uppercase W
X	88	0x58	130	01011000	Uppercase X
Y	89	0x59	131	01011001	Uppercase Y
Z	90	0x5A	132	01011010	Uppercase Z
[	91	0x5B	133	01011011	Left bracket
\	92	0x5C	134	01011100	Backslash
]	93	0x5D	135	01011101	Right bracket
^	94	0x5E	136	01011110	Caret
_	95	0x5F	137	01011111	Underscore
`	96	0x60	140	01100000	Backtick
a	97	0x61	141	01100001	Lowercase a
b	98	0x62	142	01100010	Lowercase b
c	99	0x63	143	01100011	Lowercase c
d	100	0x64	144	01100100	Lowercase d
e	101	0x65	145	01100101	Lowercase e
f	102	0x66	146	01100110	Lowercase f
g	103	0x67	147	01100111	Lowercase g
h	104	0x68	150	01101000	Lowercase h
i	105	0x69	151	01101001	Lowercase i
j	106	0x6A	152	01101010	Lowercase j
k	107	0x6B	153	01101011	Lowercase k
l	108	0x6C	154	01101100	Lowercase l
m	109	0x6D	155	01101101	Lowercase m
n	110	0x6E	156	01101110	Lowercase n
o	111	0x6F	157	01101111	Lowercase o
p	112	0x70	160	01110000	Lowercase p
q	113	0x71	161	01110001	Lowercase q
r	114	0x72	162	01110010	Lowercase r
s	115	0x73	163	01110011	Lowercase s
t	116	0x74	164	01110100	Lowercase t
u	117	0x75	165	01110101	Lowercase u
v	118	0x76	166	01110110	Lowercase v
w	119	0x77	167	01110111	Lowercase w
x	120	0x78	170	01111000	Lowercase x
y	121	0x79	171	01111001	Lowercase y
z	122	0x7A	172	01111010	Lowercase z
{	123	0x7B	173	01111011	Left brace
\|	124	0x7C	174	01111100	Vertical bar/Pipe
}	125	0x7D	175	01111101	Right brace
~	126	0x7E	176	01111110	Tilde
·	127	0x7F	177	01111111	DEL (Delete)

Quick Reference

0-31
Control characters

48-57
Digits 0-9

65-90
Uppercase A-Z

97-122
Lowercase a-z

ASCII 编码 - 技术详情

ASCII（美国信息交换标准代码）是一种 7 位字符编码标准，包含 128 个字符。它包括控制字符（0-31）、可打印字符（32-126）和 DEL（127）。ASCII 是 Unicode 和大多数文本编码的基础。

命令行替代方案

# Get ASCII value in terminal
printf '%d\n' "'A"  # 65
printf '%c\n' 65  # A

# Full ASCII table
man ascii

参考

查看官方规范