ASCII Code Lookup & Converter - Toolkk

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Decimal	Hex	Binary	Character	Note
0	0x00	00000000	-	NUL
1	0x01	00000001	-	SOH
2	0x02	00000010	-	STX
3	0x03	00000011	-	ETX
4	0x04	00000100	-	EOT
5	0x05	00000101	-	ENQ
6	0x06	00000110	-	ACK
7	0x07	00000111	-	BEL
8	0x08	00001000	-	BS
9	0x09	00001001	-	TAB
10	0x0A	00001010	-	LF
11	0x0B	00001011	-	VT
12	0x0C	00001100	-	FF
13	0x0D	00001101	-	CR
14	0x0E	00001110	-	SO
15	0x0F	00001111	-	SI
16	0x10	00010000	-	DLE
17	0x11	00010001	-	DC1
18	0x12	00010010	-	DC2
19	0x13	00010011	-	DC3
20	0x14	00010100	-	DC4
21	0x15	00010101	-	NAK
22	0x16	00010110	-	SYN
23	0x17	00010111	-	ETB
24	0x18	00011000	-	CAN
25	0x19	00011001	-	EM
26	0x1A	00011010	-	SUB
27	0x1B	00011011	-	ESC
28	0x1C	00011100	-	FS
29	0x1D	00011101	-	GS
30	0x1E	00011110	-	RS
31	0x1F	00011111	-	US
32	0x20	00100000	(space)	SPACE
33	0x21	00100001	!	-
34	0x22	00100010	"	-
35	0x23	00100011	#	-
36	0x24	00100100	$	-
37	0x25	00100101	%	-
38	0x26	00100110	&	-
39	0x27	00100111	'	-
40	0x28	00101000	(	-
41	0x29	00101001	)	-
42	0x2A	00101010	*	-
43	0x2B	00101011	+	-
44	0x2C	00101100	,	-
45	0x2D	00101101	-	-
46	0x2E	00101110	.	-
47	0x2F	00101111	/	-
48	0x30	00110000	0	-
49	0x31	00110001	1	-
50	0x32	00110010	2	-
51	0x33	00110011	3	-
52	0x34	00110100	4	-
53	0x35	00110101	5	-
54	0x36	00110110	6	-
55	0x37	00110111	7	-
56	0x38	00111000	8	-
57	0x39	00111001	9	-
58	0x3A	00111010	:	-
59	0x3B	00111011	;	-
60	0x3C	00111100	<	-
61	0x3D	00111101	=	-
62	0x3E	00111110	>	-
63	0x3F	00111111	?	-
64	0x40	01000000	@	-
65	0x41	01000001	A	-
66	0x42	01000010	B	-
67	0x43	01000011	C	-
68	0x44	01000100	D	-
69	0x45	01000101	E	-
70	0x46	01000110	F	-
71	0x47	01000111	G	-
72	0x48	01001000	H	-
73	0x49	01001001	I	-
74	0x4A	01001010	J	-
75	0x4B	01001011	K	-
76	0x4C	01001100	L	-
77	0x4D	01001101	M	-
78	0x4E	01001110	N	-
79	0x4F	01001111	O	-
80	0x50	01010000	P	-
81	0x51	01010001	Q	-
82	0x52	01010010	R	-
83	0x53	01010011	S	-
84	0x54	01010100	T	-
85	0x55	01010101	U	-
86	0x56	01010110	V	-
87	0x57	01010111	W	-
88	0x58	01011000	X	-
89	0x59	01011001	Y	-
90	0x5A	01011010	Z	-
91	0x5B	01011011	[	-
92	0x5C	01011100	\	-
93	0x5D	01011101	]	-
94	0x5E	01011110	^	-
95	0x5F	01011111	_	-
96	0x60	01100000	`	-
97	0x61	01100001	a	-
98	0x62	01100010	b	-
99	0x63	01100011	c	-
100	0x64	01100100	d	-
101	0x65	01100101	e	-
102	0x66	01100110	f	-
103	0x67	01100111	g	-
104	0x68	01101000	h	-
105	0x69	01101001	i	-
106	0x6A	01101010	j	-
107	0x6B	01101011	k	-
108	0x6C	01101100	l	-
109	0x6D	01101101	m	-
110	0x6E	01101110	n	-
111	0x6F	01101111	o	-
112	0x70	01110000	p	-
113	0x71	01110001	q	-
114	0x72	01110010	r	-
115	0x73	01110011	s	-
116	0x74	01110100	t	-
117	0x75	01110101	u	-
118	0x76	01110110	v	-
119	0x77	01110111	w	-
120	0x78	01111000	x	-
121	0x79	01111001	y	-
122	0x7A	01111010	z	-
123	0x7B	01111011	{	-
124	0x7C	01111100	\|	-
125	0x7D	01111101	}	-
126	0x7E	01111110	~	-
127	0x7F	01111111	-	DEL

Filter by keyword

Decimal	Hex	Binary	Character	Note
0	0x00	00000000	-	NUL
1	0x01	00000001	-	SOH
2	0x02	00000010	-	STX
3	0x03	00000011	-	ETX
4	0x04	00000100	-	EOT
5	0x05	00000101	-	ENQ
6	0x06	00000110	-	ACK
7	0x07	00000111	-	BEL
8	0x08	00001000	-	BS
9	0x09	00001001	-	TAB
10	0x0A	00001010	-	LF
11	0x0B	00001011	-	VT
12	0x0C	00001100	-	FF
13	0x0D	00001101	-	CR
14	0x0E	00001110	-	SO
15	0x0F	00001111	-	SI
16	0x10	00010000	-	DLE
17	0x11	00010001	-	DC1
18	0x12	00010010	-	DC2
19	0x13	00010011	-	DC3
20	0x14	00010100	-	DC4
21	0x15	00010101	-	NAK
22	0x16	00010110	-	SYN
23	0x17	00010111	-	ETB
24	0x18	00011000	-	CAN
25	0x19	00011001	-	EM
26	0x1A	00011010	-	SUB
27	0x1B	00011011	-	ESC
28	0x1C	00011100	-	FS
29	0x1D	00011101	-	GS
30	0x1E	00011110	-	RS
31	0x1F	00011111	-	US
32	0x20	00100000	(space)	SPACE
33	0x21	00100001	!	-
34	0x22	00100010	"	-
35	0x23	00100011	#	-
36	0x24	00100100	$	-
37	0x25	00100101	%	-
38	0x26	00100110	&	-
39	0x27	00100111	'	-
40	0x28	00101000	(	-
41	0x29	00101001	)	-
42	0x2A	00101010	*	-
43	0x2B	00101011	+	-
44	0x2C	00101100	,	-
45	0x2D	00101101	-	-
46	0x2E	00101110	.	-
47	0x2F	00101111	/	-
48	0x30	00110000	0	-
49	0x31	00110001	1	-
50	0x32	00110010	2	-
51	0x33	00110011	3	-
52	0x34	00110100	4	-
53	0x35	00110101	5	-
54	0x36	00110110	6	-
55	0x37	00110111	7	-
56	0x38	00111000	8	-
57	0x39	00111001	9	-
58	0x3A	00111010	:	-
59	0x3B	00111011	;	-
60	0x3C	00111100	<	-
61	0x3D	00111101	=	-
62	0x3E	00111110	>	-
63	0x3F	00111111	?	-
64	0x40	01000000	@	-
65	0x41	01000001	A	-
66	0x42	01000010	B	-
67	0x43	01000011	C	-
68	0x44	01000100	D	-
69	0x45	01000101	E	-
70	0x46	01000110	F	-
71	0x47	01000111	G	-
72	0x48	01001000	H	-
73	0x49	01001001	I	-
74	0x4A	01001010	J	-
75	0x4B	01001011	K	-
76	0x4C	01001100	L	-
77	0x4D	01001101	M	-
78	0x4E	01001110	N	-
79	0x4F	01001111	O	-
80	0x50	01010000	P	-
81	0x51	01010001	Q	-
82	0x52	01010010	R	-
83	0x53	01010011	S	-
84	0x54	01010100	T	-
85	0x55	01010101	U	-
86	0x56	01010110	V	-
87	0x57	01010111	W	-
88	0x58	01011000	X	-
89	0x59	01011001	Y	-
90	0x5A	01011010	Z	-
91	0x5B	01011011	[	-
92	0x5C	01011100	\	-
93	0x5D	01011101	]	-
94	0x5E	01011110	^	-
95	0x5F	01011111	_	-
96	0x60	01100000	`	-
97	0x61	01100001	a	-
98	0x62	01100010	b	-
99	0x63	01100011	c	-
100	0x64	01100100	d	-
101	0x65	01100101	e	-
102	0x66	01100110	f	-
103	0x67	01100111	g	-
104	0x68	01101000	h	-
105	0x69	01101001	i	-
106	0x6A	01101010	j	-
107	0x6B	01101011	k	-
108	0x6C	01101100	l	-
109	0x6D	01101101	m	-
110	0x6E	01101110	n	-
111	0x6F	01101111	o	-
112	0x70	01110000	p	-
113	0x71	01110001	q	-
114	0x72	01110010	r	-
115	0x73	01110011	s	-
116	0x74	01110100	t	-
117	0x75	01110101	u	-
118	0x76	01110110	v	-
119	0x77	01110111	w	-
120	0x78	01111000	x	-
121	0x79	01111001	y	-
122	0x7A	01111010	z	-
123	0x7B	01111011	{	-
124	0x7C	01111100	\|	-
125	0x7D	01111101	}	-
126	0x7E	01111110	~	-
127	0x7F	01111111	-	DEL

Tags: ASCII encoding converter character lookup

ASCII Code Lookup & Converter: Core Features and Principles

When you can't remember the ASCII value of a character during programming and debugging, or need to verify character encoding when processing binary data, this tool helps you convert them instantly. ASCII (American Standard Code for Information Interchange) uses 7-bit binary numbers to represent 128 basic characters. This tool provides accurate conversions between characters and three numerical formats: decimal (65), hexadecimal (0x41), and binary (0b01000001).

Why Choose Our ASCII Code Converter?

Supports three numeral systems: Synchronous display of decimal, hexadecimal, and binary results.
Smart input recognition: Automatically distinguishes between character and numerical inputs, supporting 0x/0b prefixes for base identification.
Batch processing capability: Convert multiple characters or values at once by separating them with spaces or commas.

How to Use

Enter a single character (e.g., A) to look up its corresponding ASCII code in three bases.
Enter a prefixed numerical value (e.g., 0x41 or 0b01000001) to reverse lookup the corresponding character.
For batch input, separate each item with a space (e.g., "A 0x42 0b01000011").

Frequently Asked Questions (FAQ)

How do I enter a hexadecimal ASCII code?
Simply enter it with a 0x prefix (e.g., 0x41), and the system will automatically recognize it as hexadecimal.

Why do Chinese characters cause conversion errors?
The ASCII code only supports 128 basic characters (0-127). Chinese characters fall under the Unicode encoding range. We recommend using a dedicated encoding converter for non-ASCII characters.

Important Notes

This tool only supports the standard ASCII character set (0-127). When entering numerical values, be sure to use the 0x (hexadecimal) or 0b (binary) prefix to specify the base type; otherwise, it will be treated as decimal.

Technical Notes & Tips

When debugging HTTP protocol headers or binary files, hexadecimal ASCII code lookups are commonly used for control characters (such as 0x0D for carriage return, and 0x0A for line feed). Typical scenario: When you see "0x48 0x54 0x54 0x50" in a network packet, use this tool to quickly convert it to the "HTTP" string to verify the protocol header.

ASCII Code Lookup & Converter

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