Question 1

Decimal or hex — which should I use?

Accepted Answer

Decimal codes (like 65) are easiest to read; hex codes (like 41) are common in programming and web work. Use the toggle to switch; the text re-encodes instantly.

Question 2

How do I separate multiple codes?

Accepted Answer

Use spaces or commas between codes. Both are accepted when decoding, so pasted lists usually work as-is.

Question 3

What about characters beyond standard ASCII?

Accepted Answer

Extended and Unicode characters use their code point value. The tool handles them, though its primary focus is the standard ASCII range.

Question 4

What happens if a code is invalid?

Accepted Answer

Decoding shows a clear error naming the offending token instead of producing garbled text, so mistakes are easy to spot.

Question 5

Is my text sent anywhere?

Accepted Answer

No. Encoding and decoding happen entirely in your browser, so your text and codes never leave your device.

Question 6

What is ASCII?

Accepted Answer

ASCII (American Standard Code for Information Interchange) maps characters to numbers 0–127. Letters, digits, punctuation and control characters each have a code — for example 'A' is 65 and 'a' is 97. It's the foundation most text encoding is built on.

Question 7

What is the ASCII code for A, a, and 0?

Accepted Answer

Uppercase 'A' is 65, lowercase 'a' is 97, and the digit '0' is 48. Uppercase letters run 65–90, lowercase 97–122, and digits 48–57. The full table is below.

Question 8

What's the difference between printable and control characters?

Accepted Answer

Codes 32–126 are printable (space, letters, digits, punctuation). Codes 0–31 and 127 are control characters — like tab (9), line feed (10) and carriage return (13) — that instruct devices rather than display a glyph.

Question 9

How do I convert ASCII codes back to text?

Accepted Answer

Paste the numbers (space-separated) and switch to decode mode; each number is turned back into its character. This tool handles both directions.

Question 10

Is ASCII the same as Unicode?

Accepted Answer

ASCII is a small 128-character subset. Unicode extends it to cover every writing system and emoji, but the first 128 Unicode code points are identical to ASCII, so ASCII text is always valid Unicode.

Dec	Hex	Char
32	0x20	space
33	0x21	!
34	0x22	"
35	0x23	#
36	0x24	$
37	0x25	%
38	0x26	&
39	0x27	'
40	0x28	(
41	0x29	)
42	0x2A	*
43	0x2B	+
44	0x2C	,
45	0x2D	-
46	0x2E	.
47	0x2F	/
48	0x30	0
49	0x31	1
50	0x32	2
51	0x33	3
52	0x34	4
53	0x35	5
54	0x36	6
55	0x37	7
56	0x38	8
57	0x39	9
58	0x3A	:
59	0x3B	;
60	0x3C	<
61	0x3D	=
62	0x3E	>
63	0x3F	?
64	0x40	@
65	0x41	A
66	0x42	B
67	0x43	C
68	0x44	D
69	0x45	E
70	0x46	F
71	0x47	G
72	0x48	H
73	0x49	I
74	0x4A	J
75	0x4B	K
76	0x4C	L
77	0x4D	M
78	0x4E	N
79	0x4F	O
80	0x50	P
81	0x51	Q
82	0x52	R
83	0x53	S
84	0x54	T
85	0x55	U
86	0x56	V
87	0x57	W
88	0x58	X
89	0x59	Y
90	0x5A	Z
91	0x5B	[
92	0x5C	\
93	0x5D	]
94	0x5E	^
95	0x5F	_
96	0x60	`
97	0x61	a
98	0x62	b
99	0x63	c
100	0x64	d
101	0x65	e
102	0x66	f
103	0x67	g
104	0x68	h
105	0x69	i
106	0x6A	j
107	0x6B	k
108	0x6C	l
109	0x6D	m
110	0x6E	n
111	0x6F	o
112	0x70	p
113	0x71	q
114	0x72	r
115	0x73	s
116	0x74	t
117	0x75	u
118	0x76	v
119	0x77	w
120	0x78	x
121	0x79	y
122	0x7A	z
123	0x7B	{
124	0x7C	\|
125	0x7D	}
126	0x7E	~

ASCII Converter & Table

How it works

Examples

Full printable ASCII table (32–126)

Frequently asked questions