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ASCII Code Table

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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).

A

DEC 65 · HEX 0x41

Decimal65
Hex0x41
Octal0o101
Binary0b01000001
HTMLA
CharDECHEXBIN
NUL (空)00x000b00000000
SOH10x010b00000001
STX20x020b00000010
ETX30x030b00000011
EOT40x040b00000100
ENQ50x050b00000101
ACK60x060b00000110
BEL (响铃)70x070b00000111
BS (退格)80x080b00001000
TAB (制表)90x090b00001001
LF (换行)100x0A0b00001010
VT110x0B0b00001011
FF (换页)120x0C0b00001100
CR (回车)130x0D0b00001101
SO140x0E0b00001110
SI150x0F0b00001111
DLE160x100b00010000
DC1170x110b00010001
DC2180x120b00010010
DC3190x130b00010011
DC4200x140b00010100
NAK210x150b00010101
SYN220x160b00010110
ETB230x170b00010111
CAN240x180b00011000
EM250x190b00011001
SUB260x1A0b00011010
ESC (转义)270x1B0b00011011
FS280x1C0b00011100
GS290x1D0b00011101
RS300x1E0b00011110
US310x1F0b00011111
Space (空格)320x200b00100000
!330x210b00100001
"340x220b00100010
#350x230b00100011
$360x240b00100100
%370x250b00100101
&380x260b00100110
'390x270b00100111
(400x280b00101000
)410x290b00101001
*420x2A0b00101010
+430x2B0b00101011
,440x2C0b00101100
-450x2D0b00101101
.460x2E0b00101110
/470x2F0b00101111
0480x300b00110000
1490x310b00110001
2500x320b00110010
3510x330b00110011
4520x340b00110100
5530x350b00110101
6540x360b00110110
7550x370b00110111
8560x380b00111000
9570x390b00111001
:580x3A0b00111010
;590x3B0b00111011
<600x3C0b00111100
=610x3D0b00111101
>620x3E0b00111110
?630x3F0b00111111
@640x400b01000000
A650x410b01000001
B660x420b01000010
C670x430b01000011
D680x440b01000100
E690x450b01000101
F700x460b01000110
G710x470b01000111
H720x480b01001000
I730x490b01001001
J740x4A0b01001010
K750x4B0b01001011
L760x4C0b01001100
M770x4D0b01001101
N780x4E0b01001110
O790x4F0b01001111
P800x500b01010000
Q810x510b01010001
R820x520b01010010
S830x530b01010011
T840x540b01010100
U850x550b01010101
V860x560b01010110
W870x570b01010111
X880x580b01011000
Y890x590b01011001
Z900x5A0b01011010
[910x5B0b01011011
\920x5C0b01011100
]930x5D0b01011101
^940x5E0b01011110
_950x5F0b01011111
`960x600b01100000
a970x610b01100001
b980x620b01100010
c990x630b01100011
d1000x640b01100100
e1010x650b01100101
f1020x660b01100110
g1030x670b01100111
h1040x680b01101000
i1050x690b01101001
j1060x6A0b01101010
k1070x6B0b01101011
l1080x6C0b01101100
m1090x6D0b01101101
n1100x6E0b01101110
o1110x6F0b01101111
p1120x700b01110000
q1130x710b01110001
r1140x720b01110010
s1150x730b01110011
t1160x740b01110100
u1170x750b01110101
v1180x760b01110110
w1190x770b01110111
x1200x780b01111000
y1210x790b01111001
z1220x7A0b01111010
{1230x7B0b01111011
|1240x7C0b01111100
}1250x7D0b01111101
~1260x7E0b01111110
DEL (删除)1270x7F0b01111111

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

  1. Paste or type content: drop code/text into the ASCII Code Table or fill the parameters.
  2. Choose mode/options: switch format, rules or processing as needed.
  3. Live output: results appear instantly — nothing is submitted, data stays in your browser.
  4. One-click copy: copy the output straight into your development environment.

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.

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Source & Updates

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

Last updated:

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

Maintained and periodically reviewed by the YiJianSuan editorial team — review process in ourEditorial Policy.

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.