ASCII / Hex / Binary Conversion Table

**By Dev Tools Weekly** | hextoascii.co
The complete printable reference for encoding conversions.

Control Characters (0x00–0x1F)

Dec	Hex	Bin	Char	Name	Common Use
0	00	0000 0000	NUL	Null	String terminator (C)
1	01	0000 0001	SOH	Start of Heading
2	02	0000 0010	STX	Start of Text
3	03	0000 0011	ETX	End of Text	Ctrl+C (interrupt)
4	04	0000 0100	EOT	End of Transmission	Ctrl+D (EOF)
7	07	0000 0111	BEL	Bell	Terminal beep `\a`
8	08	0000 1000	BS	Backspace	`\b`
9	09	0000 1001	HT	Horizontal Tab	`\t`
10	0A	0000 1010	LF	Line Feed	`\n` (Unix newline)
13	0D	0000 1101	CR	Carriage Return	`\r` (Windows: `\r\n`)
27	1B	0001 1011	ESC	Escape	Terminal escape sequences
32	20	0010 0000	SP	Space

Printable ASCII (0x20–0x7E)

Symbols & Numbers

Dec	Hex	Char	Dec	Hex	Char	Dec	Hex	Char
32	20	(space)	48	30	`0`	64	40	`@`
33	21	`!`	49	31	`1`	65	41	`A`
34	22	`"`	50	32	`2`	66	42	`B`
35	23	`#`	51	33	`3`	67	43	`C`
36	24	`$`	52	34	`4`	68	44	`D`
37	25	`%`	53	35	`5`	69	45	`E`
38	26	`&`	54	36	`6`	70	46	`F`
39	27	`'`	55	37	`7`	71	47	`G`
40	28	`(`	56	38	`8`	72	48	`H`
41	29	`)`	57	39	`9`	73	49	`I`
42	2A	`*`	58	3A	`:`	74	4A	`J`
43	2B	`+`	59	3B	`;`	75	4B	`K`
44	2C	`,`	60	3C	`<`	76	4C	`L`
45	2D	`-`	61	3D	`=`	77	4D	`M`
46	2E	`.`	62	3E	`>`	78	4E	`N`
47	2F	`/`	63	3F	`?`	79	4F	`O`

Letters (continued)

Dec	Hex	Char	Dec	Hex	Char	Dec	Hex	Char
80	50	`P`	91	5B	`[`	107	6B	`k`
81	51	`Q`	92	5C	`\`	108	6C	`l`
82	52	`R`	93	5D	`]`	109	6D	`m`
83	53	`S`	94	5E	`^`	110	6E	`n`
84	54	`T`	95	5F	`_`	111	6F	`o`
85	55	`U`	96	60	` `	112	70	p
86	56	V	97	61	a	113	71	q
87	57	W	98	62	b	114	72	r
88	58	X	99	63	c	115	73	s
89	59	Y	100	64	d	116	74	t
90	5A	Z	101	65	e	117	75	u
			102	66	f	118	76	v
			103	67	g	119	77	w
			104	68	h	120	78	x
			105	69	i	121	79	y
			106	6A	j	122	7A	z

Remaining Symbols

Dec	Hex	Char	Dec	Hex	Char
123	7B	{	126	7E	~
124	7C	\		127	7F	DEL
125	7D	}

Quick Conversion Formulas

Uppercase ↔ Lowercase

Upper to lower: char + 0x20 (A=0x41 → a=0x61)
Lower to upper: char - 0x20
Toggle case: char XOR 0x20


Digit Character ↔ Value

Char to value: char - 0x30 ('5'=0x35 → 5)
Value to char: value + 0x30


Hex Digit ↔ Value

0-9: char - 0x30
A-F: char - 0x37 (A=0x41 → 10)
a-f: char - 0x57 (a=0x61 → 10)



Powers of 2 — Quick Reference
Power Decimal Hex Common Name
2⁰ 1 0x1 
2⁴ 16 0x10 
2⁸ 256 0x100 1 byte range
2¹⁰ 1,024 0x400 1 KB
2¹⁶ 65,536 0x10000 2 byte range
2²⁰ 1,048,576 0x100000 1 MB
2²⁴ 16,777,216 0x1000000 3 byte range (RGB)
2³² 4,294,967,296 0x100000000 4 byte (IPv4, uint32)

Hex Color Reference
Color Hex RGB
Black #000000 0, 0, 0
White #FFFFFF 255, 255, 255
Red #FF0000 255, 0, 0
Green #00FF00 0, 255, 0
Blue #0000FF 0, 0, 255
Yellow #FFFF00 255, 255, 0
Cyan #00FFFF 0, 255, 255
Magenta #FF00FF` 255, 0, 255

🛠 Convert hex ↔ ASCII instantly: hextoascii.co
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Dec	Hex	Char	Dec	Hex	Char	Dec	Hex	Char
80	50	`P`	91	5B	`[`	107	6B	`k`
81	51	`Q`	92	5C	`\`	108	6C	`l`
82	52	`R`	93	5D	`]`	109	6D	`m`
83	53	`S`	94	5E	`^`	110	6E	`n`
84	54	`T`	95	5F	`_`	111	6F	`o`
85	55	`U`	96	60	` `	112	70	p
86	56	V	97	61	a	113	71	q
87	57	W	98	62	b	114	72	r
88	58	X	99	63	c	115	73	s
89	59	Y	100	64	d	116	74	t
90	5A	Z	101	65	e	117	75	u
			102	66	f	118	76	v
			103	67	g	119	77	w
			104	68	h	120	78	x
			105	69	i	121	79	y
			106	6A	j	122	7A	z

Power	Decimal	Hex	Common Name
2⁰	1	0x1
2⁴	16	0x10
2⁸	256	0x100	1 byte range
2¹⁰	1,024	0x400	1 KB
2¹⁶	65,536	0x10000	2 byte range
2²⁰	1,048,576	0x100000	1 MB
2²⁴	16,777,216	0x1000000	3 byte range (RGB)
2³²	4,294,967,296	0x100000000	4 byte (IPv4, uint32)

Color	Hex	RGB
Black	#000000	0, 0, 0
White	#FFFFFF	255, 255, 255
Red	#FF0000	255, 0, 0
Green	#00FF00	0, 255, 0
Blue	#0000FF	0, 0, 255
Yellow	#FFFF00	255, 255, 0
Cyan	#00FFFF	0, 255, 255
Magenta	#FF00FF`	255, 0, 255

Dec	Hex	Char	Dec	Hex	Char	Dec	Hex	Char
80	50	`P`	91	5B	`[`	107	6B	`k`
81	51	`Q`	92	5C	`\`	108	6C	`l`
82	52	`R`	93	5D	`]`	109	6D	`m`
83	53	`S`	94	5E	`^`	110	6E	`n`
84	54	`T`	95	5F	`_`	111	6F	`o`
85	55	`U`	96	60	` `	112	70	p
86	56	V	97	61	a	113	71	q
87	57	W	98	62	b	114	72	r
88	58	X	99	63	c	115	73	s
89	59	Y	100	64	d	116	74	t
90	5A	Z	101	65	e	117	75	u
			102	66	f	118	76	v
			103	67	g	119	77	w
			104	68	h	120	78	x
			105	69	i	121	79	y
			106	6A	j	122	7A	z

Dec	Hex	Char	Dec	Hex	Char	Dec	Hex	Char
80	50	`P`	91	5B	`[`	107	6B	`k`
81	51	`Q`	92	5C	`\`	108	6C	`l`
82	52	`R`	93	5D	`]`	109	6D	`m`
83	53	`S`	94	5E	`^`	110	6E	`n`
84	54	`T`	95	5F	`_`	111	6F	`o`
85	55	`U`	96	60	` `	112	70	p
86	56	V	97	61	a	113	71	q
87	57	W	98	62	b	114	72	r
88	58	X	99	63	c	115	73	s
89	59	Y	100	64	d	116	74	t
90	5A	Z	101	65	e	117	75	u
			102	66	f	118	76	v
			103	67	g	119	77	w
			104	68	h	120	78	x
			105	69	i	121	79	y
			106	6A	j	122	7A	z