ASCII Converter

Convert text to ASCII codes and back. Supports decimal, hex, binary, and octal formats.

What is ASCII?

ASCII (American Standard Code for Information Interchange) is a character encoding standard that assigns numeric codes to letters, digits, and symbols. Each character maps to a number between 0 and 127.

Converter

Output Format

Input Text

0 characters

Quick Character Lookup

ASCII Table (0-127)

Dec	Hex	Char	Dec	Hex	Char
0	00	NUL	64	40	@
1	01	SOH	65	41	A
2	02	STX	66	42	B
3	03	ETX	67	43	C
4	04	EOT	68	44	D
5	05	ENQ	69	45	E
6	06	ACK	70	46	F
7	07	BEL	71	47	G
8	08	BS	72	48	H
9	09	TAB	73	49	I
10	0A	LF	74	4A	J
11	0B	VT	75	4B	K
12	0C	FF	76	4C	L
13	0D	CR	77	4D	M
14	0E	SO	78	4E	N
15	0F	SI	79	4F	O
16	10	DLE	80	50	P
17	11	DC1	81	51	Q
18	12	DC2	82	52	R
19	13	DC3	83	53	S
20	14	DC4	84	54	T
21	15	NAK	85	55	U
22	16	SYN	86	56	V
23	17	ETB	87	57	W
24	18	CAN	88	58	X
25	19	EM	89	59	Y
26	1A	SUB	90	5A	Z
27	1B	ESC	91	5B	[
28	1C	FS	92	5C	\
29	1D	GS	93	5D	]
30	1E	RS	94	5E	^
31	1F	US	95	5F	_
32	20		96	60	`
33	21	!	97	61	a
34	22	"	98	62	b
35	23	#	99	63	c
36	24	$	100	64	d
37	25	%	101	65	e
38	26	&	102	66	f
39	27	'	103	67	g
40	28	(	104	68	h
41	29	)	105	69	i
42	2A	*	106	6A	j
43	2B	+	107	6B	k
44	2C	,	108	6C	l
45	2D	-	109	6D	m
46	2E	.	110	6E	n
47	2F	/	111	6F	o
48	30	0	112	70	p
49	31	1	113	71	q
50	32	2	114	72	r
51	33	3	115	73	s
52	34	4	116	74	t
53	35	5	117	75	u
54	36	6	118	76	v
55	37	7	119	77	w
56	38	8	120	78	x
57	39	9	121	79	y
58	3A	:	122	7A	z
59	3B	;	123	7B	{
60	3C	<	124	7C	\|
61	3D	=	125	7D	}
62	3E	>	126	7E	~
63	3F	?	127	7F	DEL

ASCII Ranges

•0-31: Control characters (non-printable)
•32: Space character
•48-57: Digits 0-9
•65-90: Uppercase A-Z
•97-122: Lowercase a-z
•127: DEL (delete)

Tips

Case Conversion: To convert uppercase to lowercase, add 32 to the ASCII code. For lowercase to uppercase, subtract 32.

Digit to Number: Subtract 48 from a digit's ASCII code to get its numeric value (e.g., '5' = 53, 53-48 = 5).

100% Client-Side: All conversions happen in your browser. No data is transmitted.

Formula & Methodology

Formula

ASCII Code = charCodeAt(char) | Char = String.fromCharCode(code) | Binary = code.toString(2).padStart(8, '0')

charCodeAt() = Returns the UTF-16 code unit (0–127 for standard ASCII) of a character

code = Integer 0–127 representing the character in the ASCII table

Binary representation = 8-bit padded binary string (e.g., "A" = 65 = 01000001)

Worked Example

Convert "Hi!" to ASCII decimal, hex, and binary

"H" (code 72)Dec: 72 | Hex: 48 | Bin: 01001000

"i" (code 105)Dec: 105 | Hex: 69 | Bin: 01101001

"!" (code 33)Dec: 33 | Hex: 21 | Bin: 00100001

ResultDecimal: 72 105 33 | Hex: 48 69 21 | Binary: 01001000 01101001 00100001

💡

Did you know? Uppercase and lowercase ASCII letters differ by exactly 32. This means you can toggle case by flipping a single bit (bit 5) — a trick used in early assembly programming for ultra-fast case conversion.

Sources

ANSI X3.4-1968 — American Standard Code for Information Interchange (ASCII)
RFC 20 — ASCII format for Network Interchange (IETF, 1969)

Frequently Asked Questions

Dec

Hex

Char

Dec

Hex

Char

NUL

SOH

STX

ETX

EOT

ENQ

ACK

BEL

TAB

DLE

DC1

DC2

DC3

DC4

NAK

SYN

ETB

CAN

SUB

ESC

[

]

100

101

102

103

(

104

)

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

;

123

{

124

125

}

126

127

DEL

ASCII Converter

What is ASCII?

Converter

ASCII Table (0-127)

ASCII Ranges

Tips

Formula & Methodology

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Frequently Asked Questions

ASCII Converter

What is ASCII?

Converter

ASCII Table (0-127)

ASCII Ranges

Tips

Formula & Methodology

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Frequently Asked Questions

Dec	Hex	Char	Dec	Hex	Char
0	00	NUL	64	40	@
1	01	SOH	65	41	A
2	02	STX	66	42	B
3	03	ETX	67	43	C
4	04	EOT	68	44	D
5	05	ENQ	69	45	E
6	06	ACK	70	46	F
7	07	BEL	71	47	G
8	08	BS	72	48	H
9	09	TAB	73	49	I
10	0A	LF	74	4A	J
11	0B	VT	75	4B	K
12	0C	FF	76	4C	L
13	0D	CR	77	4D	M
14	0E	SO	78	4E	N
15	0F	SI	79	4F	O
16	10	DLE	80	50	P
17	11	DC1	81	51	Q
18	12	DC2	82	52	R
19	13	DC3	83	53	S
20	14	DC4	84	54	T
21	15	NAK	85	55	U
22	16	SYN	86	56	V
23	17	ETB	87	57	W
24	18	CAN	88	58	X
25	19	EM	89	59	Y
26	1A	SUB	90	5A	Z
27	1B	ESC	91	5B	[
28	1C	FS	92	5C	\
29	1D	GS	93	5D	]
30	1E	RS	94	5E	^
31	1F	US	95	5F	_
32	20		96	60	`
33	21	!	97	61	a
34	22	"	98	62	b
35	23	#	99	63	c
36	24	$	100	64	d
37	25	%	101	65	e
38	26	&	102	66	f
39	27	'	103	67	g
40	28	(	104	68	h
41	29	)	105	69	i
42	2A	*	106	6A	j
43	2B	+	107	6B	k
44	2C	,	108	6C	l
45	2D	-	109	6D	m
46	2E	.	110	6E	n
47	2F	/	111	6F	o
48	30	0	112	70	p
49	31	1	113	71	q
50	32	2	114	72	r
51	33	3	115	73	s
52	34	4	116	74	t
53	35	5	117	75	u
54	36	6	118	76	v
55	37	7	119	77	w
56	38	8	120	78	x
57	39	9	121	79	y
58	3A	:	122	7A	z
59	3B	;	123	7B	{
60	3C	<	124	7C	\|
61	3D	=	125	7D	}
62	3E	>	126	7E	~
63	3F	?	127	7F	DEL

Dec	Hex	Char	Dec	Hex	Char
0	00	NUL	64	40	@
1	01	SOH	65	41	A
2	02	STX	66	42	B
3	03	ETX	67	43	C
4	04	EOT	68	44	D
5	05	ENQ	69	45	E
6	06	ACK	70	46	F
7	07	BEL	71	47	G
8	08	BS	72	48	H
9	09	TAB	73	49	I
10	0A	LF	74	4A	J
11	0B	VT	75	4B	K
12	0C	FF	76	4C	L
13	0D	CR	77	4D	M
14	0E	SO	78	4E	N
15	0F	SI	79	4F	O
16	10	DLE	80	50	P
17	11	DC1	81	51	Q
18	12	DC2	82	52	R
19	13	DC3	83	53	S
20	14	DC4	84	54	T
21	15	NAK	85	55	U
22	16	SYN	86	56	V
23	17	ETB	87	57	W
24	18	CAN	88	58	X
25	19	EM	89	59	Y
26	1A	SUB	90	5A	Z
27	1B	ESC	91	5B	[
28	1C	FS	92	5C	\
29	1D	GS	93	5D	]
30	1E	RS	94	5E	^
31	1F	US	95	5F	_
32	20		96	60	`
33	21	!	97	61	a
34	22	"	98	62	b
35	23	#	99	63	c
36	24	$	100	64	d
37	25	%	101	65	e
38	26	&	102	66	f
39	27	'	103	67	g
40	28	(	104	68	h
41	29	)	105	69	i
42	2A	*	106	6A	j
43	2B	+	107	6B	k
44	2C	,	108	6C	l
45	2D	-	109	6D	m
46	2E	.	110	6E	n
47	2F	/	111	6F	o
48	30	0	112	70	p
49	31	1	113	71	q
50	32	2	114	72	r
51	33	3	115	73	s
52	34	4	116	74	t
53	35	5	117	75	u
54	36	6	118	76	v
55	37	7	119	77	w
56	38	8	120	78	x
57	39	9	121	79	y
58	3A	:	122	7A	z
59	3B	;	123	7B	{
60	3C	<	124	7C	\|
61	3D	=	125	7D	}
62	3E	>	126	7E	~
63	3F	?	127	7F	DEL

Dec	Hex	Char	Dec	Hex	Char
0	00	NUL	64	40	@
1	01	SOH	65	41	A
2	02	STX	66	42	B
3	03	ETX	67	43	C
4	04	EOT	68	44	D
5	05	ENQ	69	45	E
6	06	ACK	70	46	F
7	07	BEL	71	47	G
8	08	BS	72	48	H
9	09	TAB	73	49	I
10	0A	LF	74	4A	J
11	0B	VT	75	4B	K
12	0C	FF	76	4C	L
13	0D	CR	77	4D	M
14	0E	SO	78	4E	N
15	0F	SI	79	4F	O
16	10	DLE	80	50	P
17	11	DC1	81	51	Q
18	12	DC2	82	52	R
19	13	DC3	83	53	S
20	14	DC4	84	54	T
21	15	NAK	85	55	U
22	16	SYN	86	56	V
23	17	ETB	87	57	W
24	18	CAN	88	58	X
25	19	EM	89	59	Y
26	1A	SUB	90	5A	Z
27	1B	ESC	91	5B	[
28	1C	FS	92	5C	\
29	1D	GS	93	5D	]
30	1E	RS	94	5E	^
31	1F	US	95	5F	_
32	20		96	60	`
33	21	!	97	61	a
34	22	"	98	62	b
35	23	#	99	63	c
36	24	$	100	64	d
37	25	%	101	65	e
38	26	&	102	66	f
39	27	'	103	67	g
40	28	(	104	68	h
41	29	)	105	69	i
42	2A	*	106	6A	j
43	2B	+	107	6B	k
44	2C	,	108	6C	l
45	2D	-	109	6D	m
46	2E	.	110	6E	n
47	2F	/	111	6F	o
48	30	0	112	70	p
49	31	1	113	71	q
50	32	2	114	72	r
51	33	3	115	73	s
52	34	4	116	74	t
53	35	5	117	75	u
54	36	6	118	76	v
55	37	7	119	77	w
56	38	8	120	78	x
57	39	9	121	79	y
58	3A	:	122	7A	z
59	3B	;	123	7B	{
60	3C	<	124	7C	\|
61	3D	=	125	7D	}
62	3E	>	126	7E	~
63	3F	?	127	7F	DEL

Dec	Hex	Char	Dec	Hex	Char
0	00	NUL	64	40	@
1	01	SOH	65	41	A
2	02	STX	66	42	B
3	03	ETX	67	43	C
4	04	EOT	68	44	D
5	05	ENQ	69	45	E
6	06	ACK	70	46	F
7	07	BEL	71	47	G
8	08	BS	72	48	H
9	09	TAB	73	49	I
10	0A	LF	74	4A	J
11	0B	VT	75	4B	K
12	0C	FF	76	4C	L
13	0D	CR	77	4D	M
14	0E	SO	78	4E	N
15	0F	SI	79	4F	O
16	10	DLE	80	50	P
17	11	DC1	81	51	Q
18	12	DC2	82	52	R
19	13	DC3	83	53	S
20	14	DC4	84	54	T
21	15	NAK	85	55	U
22	16	SYN	86	56	V
23	17	ETB	87	57	W
24	18	CAN	88	58	X
25	19	EM	89	59	Y
26	1A	SUB	90	5A	Z
27	1B	ESC	91	5B	[
28	1C	FS	92	5C	\
29	1D	GS	93	5D	]
30	1E	RS	94	5E	^
31	1F	US	95	5F	_
32	20		96	60	`
33	21	!	97	61	a
34	22	"	98	62	b
35	23	#	99	63	c
36	24	$	100	64	d
37	25	%	101	65	e
38	26	&	102	66	f
39	27	'	103	67	g
40	28	(	104	68	h
41	29	)	105	69	i
42	2A	*	106	6A	j
43	2B	+	107	6B	k
44	2C	,	108	6C	l
45	2D	-	109	6D	m
46	2E	.	110	6E	n
47	2F	/	111	6F	o
48	30	0	112	70	p
49	31	1	113	71	q
50	32	2	114	72	r
51	33	3	115	73	s
52	34	4	116	74	t
53	35	5	117	75	u
54	36	6	118	76	v
55	37	7	119	77	w
56	38	8	120	78	x
57	39	9	121	79	y
58	3A	:	122	7A	z
59	3B	;	123	7B	{
60	3C	<	124	7C	\|
61	3D	=	125	7D	}
62	3E	>	126	7E	~
63	3F	?	127	7F	DEL

ASCII Converter

What is ASCII?

Converter

ASCII Table (0-127)

ASCII Ranges

Tips

Formula & Methodology

Related Tech & Digital

Aspect Ratio Calculator

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Base64 Encoder/Decoder

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Color Blindness Simulator

Frequently Asked Questions

What is ASCII?

What is the difference between ASCII and Unicode?

How do I convert text to binary?

What are control characters?

Why is ASCII important for programming?

ASCII Converter

What is ASCII?

Converter

ASCII Table (0-127)

ASCII Ranges

Tips

Formula & Methodology

Related Tech & Digital

Aspect Ratio Calculator

Bandwidth Calculator

Base64 Encoder/Decoder

Border Radius Generator

Box Shadow Generator

Color Blindness Simulator

Frequently Asked Questions

What is ASCII?

What is the difference between ASCII and Unicode?

How do I convert text to binary?

What are control characters?

Why is ASCII important for programming?

Dec	Hex	Char	Dec	Hex	Char
0	00	NUL	64	40	@
1	01	SOH	65	41	A
2	02	STX	66	42	B
3	03	ETX	67	43	C
4	04	EOT	68	44	D
5	05	ENQ	69	45	E
6	06	ACK	70	46	F
7	07	BEL	71	47	G
8	08	BS	72	48	H
9	09	TAB	73	49	I
10	0A	LF	74	4A	J
11	0B	VT	75	4B	K
12	0C	FF	76	4C	L
13	0D	CR	77	4D	M
14	0E	SO	78	4E	N
15	0F	SI	79	4F	O
16	10	DLE	80	50	P
17	11	DC1	81	51	Q
18	12	DC2	82	52	R
19	13	DC3	83	53	S
20	14	DC4	84	54	T
21	15	NAK	85	55	U
22	16	SYN	86	56	V
23	17	ETB	87	57	W
24	18	CAN	88	58	X
25	19	EM	89	59	Y
26	1A	SUB	90	5A	Z
27	1B	ESC	91	5B	[
28	1C	FS	92	5C	\
29	1D	GS	93	5D	]
30	1E	RS	94	5E	^
31	1F	US	95	5F	_
32	20		96	60	`
33	21	!	97	61	a
34	22	"	98	62	b
35	23	#	99	63	c
36	24	$	100	64	d
37	25	%	101	65	e
38	26	&	102	66	f
39	27	'	103	67	g
40	28	(	104	68	h
41	29	)	105	69	i
42	2A	*	106	6A	j
43	2B	+	107	6B	k
44	2C	,	108	6C	l
45	2D	-	109	6D	m
46	2E	.	110	6E	n
47	2F	/	111	6F	o
48	30	0	112	70	p
49	31	1	113	71	q
50	32	2	114	72	r
51	33	3	115	73	s
52	34	4	116	74	t
53	35	5	117	75	u
54	36	6	118	76	v
55	37	7	119	77	w
56	38	8	120	78	x
57	39	9	121	79	y
58	3A	:	122	7A	z
59	3B	;	123	7B	{
60	3C	<	124	7C	\|
61	3D	=	125	7D	}
62	3E	>	126	7E	~
63	3F	?	127	7F	DEL

Dec	Hex	Char	Dec	Hex	Char
0	00	NUL	64	40	@
1	01	SOH	65	41	A
2	02	STX	66	42	B
3	03	ETX	67	43	C
4	04	EOT	68	44	D
5	05	ENQ	69	45	E
6	06	ACK	70	46	F
7	07	BEL	71	47	G
8	08	BS	72	48	H
9	09	TAB	73	49	I
10	0A	LF	74	4A	J
11	0B	VT	75	4B	K
12	0C	FF	76	4C	L
13	0D	CR	77	4D	M
14	0E	SO	78	4E	N
15	0F	SI	79	4F	O
16	10	DLE	80	50	P
17	11	DC1	81	51	Q
18	12	DC2	82	52	R
19	13	DC3	83	53	S
20	14	DC4	84	54	T
21	15	NAK	85	55	U
22	16	SYN	86	56	V
23	17	ETB	87	57	W
24	18	CAN	88	58	X
25	19	EM	89	59	Y
26	1A	SUB	90	5A	Z
27	1B	ESC	91	5B	[
28	1C	FS	92	5C	\
29	1D	GS	93	5D	]
30	1E	RS	94	5E	^
31	1F	US	95	5F	_
32	20		96	60	`
33	21	!	97	61	a
34	22	"	98	62	b
35	23	#	99	63	c
36	24	$	100	64	d
37	25	%	101	65	e
38	26	&	102	66	f
39	27	'	103	67	g
40	28	(	104	68	h
41	29	)	105	69	i
42	2A	*	106	6A	j
43	2B	+	107	6B	k
44	2C	,	108	6C	l
45	2D	-	109	6D	m
46	2E	.	110	6E	n
47	2F	/	111	6F	o
48	30	0	112	70	p
49	31	1	113	71	q
50	32	2	114	72	r
51	33	3	115	73	s
52	34	4	116	74	t
53	35	5	117	75	u
54	36	6	118	76	v
55	37	7	119	77	w
56	38	8	120	78	x
57	39	9	121	79	y
58	3A	:	122	7A	z
59	3B	;	123	7B	{
60	3C	<	124	7C	\|
61	3D	=	125	7D	}
62	3E	>	126	7E	~
63	3F	?	127	7F	DEL