ASCII

ASCII maps numbers to characters. Type a character or a code to see all representations.

What is ASCII?

How computers turn numbers into text.

ASCII (American Standard Code for Information Interchange) is a lookup table that maps numbers to characters. It was designed so every device can agree that, for example, the number 65 means an uppercase A.

Standard ASCII uses 7 bits, so it covers codes 0–127. Codes 0–31 are control characters (tab, newline, carriage return), code 32 is a space, and codes 32–126 cover printable letters, digits, punctuation, and symbols.

Character	A
Decimal	65
Hex	41
Binary	0100 0001

The same byte can be shown as a character, decimal number, hex value, or binary bits — ASCII is just the agreement on which character each number represents. Modern encodings like UTF-8 extend this idea to support emojis and every world alphabet, but they keep the ASCII values unchanged.

Character lookup

Edit the character or its decimal code.

Character

Decimal code

Representations

How the character is stored in different forms.

Character

Decimal

Hex

Binary

01000001

Norwegian letters: Æ, Ø, Å

Why æ, ø and å need more than plain ASCII — and how they are stored today.

Standard ASCII only has 128 slots (0–127) and none of them hold the Norwegian letters. Latin-1 (ISO 8859-1) extended the table to 256 slots and gave them fixed codes, which is why old files sometimes show Ã¦ when read with the wrong encoding. Modern text uses UTF-8, where each Norwegian letter is stored as two bytes.

Char	Latin-1 dec	Latin-1 hex	Latin-1 binary	UTF-8 bytes
Æ	198	C6	11000110	0xC3 0x86
Ø	216	D8	11011000	0xC3 0x98
Å	197	C5	11000101	0xC3 0x85
æ	230	E6	11100110	0xC3 0xA6
ø	248	F8	11111000	0xC3 0xB8
å	229	E5	11100101	0xC3 0xA5

Try typing æ in the character field above, or the code 230 — the lookup now accepts the full 0–255 Latin-1 range.

Printable ASCII table

Codes 32–126 cover letters, digits, punctuation, and symbols.

Char	Decimal	Hex	Binary
	32	20	00100000
!	33	21	00100001
"	34	22	00100010
#	35	23	00100011
$	36	24	00100100
%	37	25	00100101
&	38	26	00100110
'	39	27	00100111
(	40	28	00101000
)	41	29	00101001
*	42	2A	00101010
+	43	2B	00101011
,	44	2C	00101100
-	45	2D	00101101
.	46	2E	00101110
/	47	2F	00101111
0	48	30	00110000
1	49	31	00110001
2	50	32	00110010
3	51	33	00110011
4	52	34	00110100
5	53	35	00110101
6	54	36	00110110
7	55	37	00110111
8	56	38	00111000
9	57	39	00111001
:	58	3A	00111010
;	59	3B	00111011
<	60	3C	00111100
=	61	3D	00111101
>	62	3E	00111110
?	63	3F	00111111
@	64	40	01000000
A	65	41	01000001
B	66	42	01000010
C	67	43	01000011
D	68	44	01000100
E	69	45	01000101
F	70	46	01000110
G	71	47	01000111
H	72	48	01001000
I	73	49	01001001
J	74	4A	01001010
K	75	4B	01001011
L	76	4C	01001100
M	77	4D	01001101
N	78	4E	01001110
O	79	4F	01001111
P	80	50	01010000
Q	81	51	01010001
R	82	52	01010010
S	83	53	01010011
T	84	54	01010100
U	85	55	01010101
V	86	56	01010110
W	87	57	01010111
X	88	58	01011000
Y	89	59	01011001
Z	90	5A	01011010
[	91	5B	01011011
\	92	5C	01011100
]	93	5D	01011101
^	94	5E	01011110
_	95	5F	01011111
`	96	60	01100000
a	97	61	01100001
b	98	62	01100010
c	99	63	01100011
d	100	64	01100100
e	101	65	01100101
f	102	66	01100110
g	103	67	01100111
h	104	68	01101000
i	105	69	01101001
j	106	6A	01101010
k	107	6B	01101011
l	108	6C	01101100
m	109	6D	01101101
n	110	6E	01101110
o	111	6F	01101111
p	112	70	01110000
q	113	71	01110001
r	114	72	01110010
s	115	73	01110011
t	116	74	01110100
u	117	75	01110101
v	118	76	01110110
w	119	77	01110111
x	120	78	01111000
y	121	79	01111001
z	122	7A	01111010
{	123	7B	01111011
\|	124	7C	01111100
}	125	7D	01111101
~	126	7E	01111110