ASCII Code Table

Char ↔ code in dec/hex/oct with full printable table

Quick Answer

ASCII Code Table: Char ↔ code in dec/hex/oct with full printable table. 0–31: control chars (7 BEL · 9 Tab · 10 LF · 13 CR · 27 ESC).

Character (first char used)

DEC 65 · HEX 0x41

Decimal65

Hex0x41

Octal0o101

Binary0b01000001

HTMLA

Search the full ASCII table (char / code / name)

Char	DEC	HEX	BIN
NUL (空)	0	0x00	0b00000000
SOH	1	0x01	0b00000001
STX	2	0x02	0b00000010
ETX	3	0x03	0b00000011
EOT	4	0x04	0b00000100
ENQ	5	0x05	0b00000101
ACK	6	0x06	0b00000110
BEL (响铃)	7	0x07	0b00000111
BS (退格)	8	0x08	0b00001000
TAB (制表)	9	0x09	0b00001001
LF (换行)	10	0x0A	0b00001010
VT	11	0x0B	0b00001011
FF (换页)	12	0x0C	0b00001100
CR (回车)	13	0x0D	0b00001101
SO	14	0x0E	0b00001110
SI	15	0x0F	0b00001111
DLE	16	0x10	0b00010000
DC1	17	0x11	0b00010001
DC2	18	0x12	0b00010010
DC3	19	0x13	0b00010011
DC4	20	0x14	0b00010100
NAK	21	0x15	0b00010101
SYN	22	0x16	0b00010110
ETB	23	0x17	0b00010111
CAN	24	0x18	0b00011000
EM	25	0x19	0b00011001
SUB	26	0x1A	0b00011010
ESC (转义)	27	0x1B	0b00011011
FS	28	0x1C	0b00011100
GS	29	0x1D	0b00011101
RS	30	0x1E	0b00011110
US	31	0x1F	0b00011111
Space (空格)	32	0x20	0b00100000
!	33	0x21	0b00100001
"	34	0x22	0b00100010
#	35	0x23	0b00100011
$	36	0x24	0b00100100
%	37	0x25	0b00100101
&	38	0x26	0b00100110
'	39	0x27	0b00100111
(	40	0x28	0b00101000
)	41	0x29	0b00101001
*	42	0x2A	0b00101010
+	43	0x2B	0b00101011
,	44	0x2C	0b00101100
-	45	0x2D	0b00101101
.	46	0x2E	0b00101110
/	47	0x2F	0b00101111
0	48	0x30	0b00110000
1	49	0x31	0b00110001
2	50	0x32	0b00110010
3	51	0x33	0b00110011
4	52	0x34	0b00110100
5	53	0x35	0b00110101
6	54	0x36	0b00110110
7	55	0x37	0b00110111
8	56	0x38	0b00111000
9	57	0x39	0b00111001
:	58	0x3A	0b00111010
;	59	0x3B	0b00111011
<	60	0x3C	0b00111100
=	61	0x3D	0b00111101
>	62	0x3E	0b00111110
?	63	0x3F	0b00111111
@	64	0x40	0b01000000
A	65	0x41	0b01000001
B	66	0x42	0b01000010
C	67	0x43	0b01000011
D	68	0x44	0b01000100
E	69	0x45	0b01000101
F	70	0x46	0b01000110
G	71	0x47	0b01000111
H	72	0x48	0b01001000
I	73	0x49	0b01001001
J	74	0x4A	0b01001010
K	75	0x4B	0b01001011
L	76	0x4C	0b01001100
M	77	0x4D	0b01001101
N	78	0x4E	0b01001110
O	79	0x4F	0b01001111
P	80	0x50	0b01010000
Q	81	0x51	0b01010001
R	82	0x52	0b01010010
S	83	0x53	0b01010011
T	84	0x54	0b01010100
U	85	0x55	0b01010101
V	86	0x56	0b01010110
W	87	0x57	0b01010111
X	88	0x58	0b01011000
Y	89	0x59	0b01011001
Z	90	0x5A	0b01011010
[	91	0x5B	0b01011011
\	92	0x5C	0b01011100
]	93	0x5D	0b01011101
^	94	0x5E	0b01011110
_	95	0x5F	0b01011111
`	96	0x60	0b01100000
a	97	0x61	0b01100001
b	98	0x62	0b01100010
c	99	0x63	0b01100011
d	100	0x64	0b01100100
e	101	0x65	0b01100101
f	102	0x66	0b01100110
g	103	0x67	0b01100111
h	104	0x68	0b01101000
i	105	0x69	0b01101001
j	106	0x6A	0b01101010
k	107	0x6B	0b01101011
l	108	0x6C	0b01101100
m	109	0x6D	0b01101101
n	110	0x6E	0b01101110
o	111	0x6F	0b01101111
p	112	0x70	0b01110000
q	113	0x71	0b01110001
r	114	0x72	0b01110010
s	115	0x73	0b01110011
t	116	0x74	0b01110100
u	117	0x75	0b01110101
v	118	0x76	0b01110110
w	119	0x77	0b01110111
x	120	0x78	0b01111000
y	121	0x79	0b01111001
z	122	0x7A	0b01111010
{	123	0x7B	0b01111011
\|	124	0x7C	0b01111100
}	125	0x7D	0b01111101
~	126	0x7E	0b01111110
DEL (删除)	127	0x7F	0b01111111

Quick reference

'0'-'9' = 48–57 · 'A'-'Z' = 65–90 · 'a'-'z' = 97–122 · Space = 32 · case toggle = ±32. ASCII covers only 0–127; Chinese characters live in Unicode (UTF-8).

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How to Use

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Key Points

ASCII Code Table is a free online developer tool — open and use, no sign-up.
All calculations run locally in your browser; your data never leaves the device.
Key capability: Char ↔ code in dec/hex/oct with full printable table.
Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

ASCII essentials

0–31: control chars (7 BEL · 9 Tab · 10 LF · 13 CR · 27 ESC)

32 space · 48–57 digits 0–9 · 65–90 A–Z · 97–122 a–z

Case toggle: ±32 (XOR 0x20)

'A' = 65 = 0x41 = 0o101

Example: 'a' = 97, 'A' = 65 — differ by exactly 32.

FAQ

How do I use the ASCII Code Table?

Open the page and fill in the input fields — results update automatically. Char ↔ code in dec/hex/oct with full printable table.

Are the results accurate?

Yes. Standard formulas and conversion factors are used and verified.

Is it free? Do I need to sign up?

Completely free. No registration, login or download required.

Does it work on mobile?

Yes. The responsive design works on phones, tablets and desktops.

Is my data saved?

No. Everything runs locally in your browser.

Related Guides

Source & Updates

Based on RFC 4648, ECMA-262 and related specifications. Last updated: 2025-07

Last updated: 2026-08-03

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Cite this page: YiJianSuan. ASCII Code Table[EB/OL]. https://www.yijiansuan.com/en/c/dev/ascii

Results provided by this tool are for reference only and do not constitute professional advice.