ASCII Table (“American Standard Code for Information Interchange”)

ASCII Table

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ASCII (an acronym for "American Standard Code for Information Interchange") is a character encoding system based on the English alphabet (therefore, it is often named "US-ASCII"). The ASCII character set contains 128 characters: uppercase and lowercase letters, digits, punctuation marks, and control characters. Each character is represented by a decimal number (named "ASCII code").

Since the ASCII table contains only a limited number of characters, I developed a converter that allows you to get info about any character by specifying its decimal, binary, hex, or symbol. That is, you insert your data into the corresponding field, click the "Convert" button, and it converts data into all available formats.

Decimal	Binary	Hex	Symbol

Also, for your convenience, all extended ASCII characters are presented in the table below. The extended ASCII table contains basic characters sorted by ASCII code. Each character has its own unique code, binary value, symbol, name, and description.

Decimal	Binary	Hex	Symbol	Name	Description
0	00000000	0x00	NUL	Null	Used as sign of end of a string or to fill an unallocated data space
1	00000001	0x01	SOH	Start of Heading	Defines the beginning of the message header block
2	00000010	0x02	STX	Start of Text	Specifies the beginning of the text block and terminates the header block
3	00000011	0x03	ETX	End of Text	Often used as a "break" character (Ctrl C) to terminate a program
4	00000100	0x04	EOT	End of Transmission	Control character that indicates end-of-file on a terminal
5	00000101	0x05	ENQ	Enquiry	Transmission-control character that requests a response from the receiving end
6	00000110	0x06	ACK	Acknowledgement	Response to an ENQ, or an indication of successful receipt of a message
7	00000111	0x07	BEL	Bell	Device control code informs the system that it should beep
8	00001000	0x08	BS	Backspace	Moves the cursor one position leftwards and removes its character
9	00001001	0x09	HT	Horizontal Tab	Moves the cursor to the next tab stop (e.g., by pressing the Tab key)
10	00001010	0x0A	LF	Line Feed	It is used to indicate the end of a line (e.g., by pressing the Enter key on UNIX)
11	00001011	0x0B	VT	Vertical Tab	Place the form at the next line tab stop
12	00001100	0x0C	FF	Form Feed	Page-breaking character indicates that the following content is part of a new page
13	00001101	0x0D	CR	Carriage Return	It is used to indicate the end of a line (e.g., by pressing the Enter key on MacOS)
14	00001110	0x0E	SO	Shift Out	Known as Control-N, it switches to an alternate character set
15	00001111	0x0F	SI	Shift In	Known as Control-O, it returns the regular character set after Shift Out
16	00010000	0x10	DLE	Data Link Escape	Force the following octets to be interpreted as raw data
17	00010001	0x11	DC1	Device Control 1	Known as XON, it resumes or turns on the device
18	00010010	0x12	DC2	Device Control 2	The same as DC1
19	00010011	0x13	DC3	Device Control 3	Known as XOFF, it pauses or turns off the device
20	00010100	0x14	DC4	Device Control 4	The same as DC3
21	00010101	0x15	NAK	Negative Acknowledgement	Reply to the ENQ message informing the sender of an occurred error
22	00010110	0x16	SYN	Synchronous Idle	Used in hardware synchronization procedures
23	00010111	0x17	ETB	End of Transmission Block	It is used when transferring data by blocks and serves as a separator
24	00011000	0x18	CAN	Cancel	Tells the device to ignore the data that was sent before this character
25	00011001	0x19	EM	End of Medium	Used to notify that the paper or magnetic tape reached the end
26	00011010	0x1A	SUB	Substitute	May be used to replace a character or to undo the last action
27	00011011	0x1B	ESC	Escape	Usually it is associated with the Esc key (for example, to close a popup)
28	00011100	0x1C	FS	File Separator	It is used as a sign of dividing the data stream into files
29	00011101	0x1D	GS	Group Separator	It is used as a sign of dividing the data stream into groups
30	00011110	0x1E	RS	Record Separator	It is a record separator in the data stream
31	00011111	0x1F	US	Unit Separator	It is intended for separating elements in the data stream
32	00100000	0x20		Space	Blank area that separates characters (can be written by pressing the Space key)
33	00100001	0x21	!	Exclamation mark	Shift 1
34	00100010	0x22	"	Quotation mark	Shift '
35	00100011	0x23	#	Number sign	Shift 3
36	00100100	0x24	$	Dollar sign	Shift 4
37	00100101	0x25	%	Percent sign	Shift 5
38	00100110	0x26	&	Ampersand	Shift 7
39	00100111	0x27	'	Apostrophe
40	00101000	0x28	(	Left parenthesis	Shift 9
41	00101001	0x29	)	Right parenthesis	Shift 10
42	00101010	0x2A	*	Asterisk	Shift 8
43	00101011	0x2B	+	Plus sign	Shift =
44	00101100	0x2C	,	Comma
45	00101101	0x2D	-	Hyphen-minus
46	00101110	0x2E	.	Full stop (dot)
47	00101111	0x2F	/	Slash
48	00110000	0x30	0	Zero
49	00110001	0x31	1	One
50	00110010	0x32	2	Two
51	00110011	0x33	3	Three
52	00110100	0x34	4	Four
53	00110101	0x35	5	Five
54	00110110	0x36	6	Six
55	00110111	0x37	7	Seven
56	00111000	0x38	8	Eight
57	00111001	0x39	9	Nine
58	00111010	0x3A	:	Colon	Shift ;
59	00111011	0x3B	;	Semicolon
60	00111100	0x3C	<	Less-than sign	Shift ,
61	00111101	0x3D	=	Equals sign
62	00111110	0x3E	>	Greater-than sign	Shift .
63	00111111	0x3F	?	Question mark	Shift /
64	01000000	0x40	@	At sign	Shift 2
65	01000001	0x41	A	Uppercase "A"
66	01000010	0x42	B	Uppercase "B"
67	01000011	0x43	C	Uppercase "C"
68	01000100	0x44	D	Uppercase "D"
69	01000101	0x45	E	Uppercase "E"
70	01000110	0x46	F	Uppercase "F"
71	01000111	0x47	G	Uppercase "G"
72	01001000	0x48	H	Uppercase "H"
73	01001001	0x49	I	Uppercase "I"
74	01001010	0x4A	J	Uppercase "J"
75	01001011	0x4B	K	Uppercase "K"
76	01001100	0x4C	L	Uppercase "L"
77	01001101	0x4D	M	Uppercase "M"
78	01001110	0x4E	N	Uppercase "N"
79	01001111	0x4F	O	Uppercase "O"
80	01010000	0x50	P	Uppercase "P"
81	01010001	0x51	Q	Uppercase "Q"
82	01010010	0x52	R	Uppercase "R"
83	01010011	0x53	S	Uppercase "S"
84	01010100	0x54	T	Uppercase "T"
85	01010101	0x55	U	Uppercase "U"
86	01010110	0x56	V	Uppercase "V"
87	01010111	0x57	W	Uppercase "W"
88	01011000	0x58	X	Uppercase "X"
89	01011001	0x59	Y	Uppercase "Y"
90	01011010	0x5A	Z	Uppercase "Z"
91	01011011	0x5B	[	Left square bracket
92	01011100	0x5C	\	Backslash
93	01011101	0x5D	]	Right square bracket
94	01011110	0x5E	^	Caret	Shift 6
95	01011111	0x5F	_	Underscore	Shift -
96	01100000	0x60	`	Grave accent
97	01100001	0x61	a	Lowercase "a"
98	01100010	0x62	b	Lowercase "b"
99	01100011	0x63	c	Lowercase "c"
100	01100100	0x64	d	Lowercase "d"
101	01100101	0x65	e	Lowercase "e"
102	01100110	0x66	f	Lowercase "f"
103	01100111	0x67	g	Lowercase "g"
104	01101000	0x68	h	Lowercase "h"
105	01101001	0x69	i	Lowercase "i"
106	01101010	0x6A	j	Lowercase "j"
107	01101011	0x6B	k	Lowercase "k"
108	01101100	0x6C	l	Lowercase "l"
109	01101101	0x6D	m	Lowercase "m"
110	01101110	0x6E	n	Lowercase "n"
111	01101111	0x6F	o	Lowercase "o"
112	01110000	0x70	p	Lowercase "p"
113	01110001	0x71	q	Lowercase "q"
114	01110010	0x72	r	Lowercase "r"
115	01110011	0x73	s	Lowercase "s"
116	01110100	0x74	t	Lowercase "t"
117	01110101	0x75	u	Lowercase "u"
118	01110110	0x76	v	Lowercase "v"
119	01110111	0x77	w	Lowercase "w"
120	01111000	0x78	x	Lowercase "x"
121	01111001	0x79	y	Lowercase "y"
122	01111010	0x7A	z	Lowercase "z"
123	01111011	0x7B	{	Left curly bracket	Shift [
124	01111100	0x7C	|	Vertical bar	Shift \
125	01111101	0x7D	}	Right curly bracket	Shift ]
126	01111110	0x7E	~	Tilde	Shift `
127	01111111	0x7F	DEL	Delete	Marks deleted symbols on paper tape
128	10000000	0x80	€
129	10000001	0x81
130	10000010	0x82	‚
131	10000011	0x83	ƒ
132	10000100	0x84	„
133	10000101	0x85	…
134	10000110	0x86	†
135	10000111	0x87	‡
136	10001000	0x88	ˆ
137	10001001	0x89	‰
138	10001010	0x8A	Š
139	10001011	0x8B	‹
140	10001100	0x8C	Œ
141	10001101	0x8D
142	10001110	0x8E	Ž
143	10001111	0x8F
144	10010000	0x90
145	10010001	0x91	'
146	10010010	0x92	'
147	10010011	0x93	"
148	10010100	0x94	"
149	10010101	0x95	•
150	10010110	0x96	–
151	10010111	0x97	—
152	10011000	0x98	˜
153	10011001	0x99	™
154	10011010	0x9A	š
155	10011011	0x9B	›
156	10011100	0x9C	œ
157	10011101	0x9D
158	10011110	0x9E	ž
159	10011111	0x9F	Ÿ
160	10100000	0xA0
161	10100001	0xA1	¡
162	10100010	0xA2	¢
163	10100011	0xA3	£
164	10100100	0xA4	¤
165	10100101	0xA5	¥
166	10100110	0xA6	¦
167	10100111	0xA7	§
168	10101000	0xA8	¨
169	10101001	0xA9	©
170	10101010	0xAA	ª
171	10101011	0xAB	«
172	10101100	0xAC	¬
173	10101101	0xAD	­
174	10101110	0xAE	®
175	10101111	0xAF	¯
176	10110000	0xB0	°
177	10110001	0xB1	±
178	10110010	0xB2	²
179	10110011	0xB3	³
180	10110100	0xB4	´
181	10110101	0xB5	µ
182	10110110	0xB6	¶
183	10110111	0xB7	·
184	10111000	0xB8	¸
185	10111001	0xB9	¹
186	10111010	0xBA	º
187	10111011	0xBB	»
188	10111100	0xBC	¼
189	10111101	0xBD	½
190	10111110	0xBE	¾
191	10111111	0xBF	¿
192	11000000	0xC0	À
193	11000001	0xC1	Á
194	11000010	0xC2	Â
195	11000011	0xC3	Ã
196	11000100	0xC4	Ä
197	11000101	0xC5	Å
198	11000110	0xC6	Æ
199	11000111	0xC7	Ç
200	11001000	0xC8	È
201	11001001	0xC9	É
202	11001010	0xCA	Ê
203	11001011	0xCB	Ë
204	11001100	0xCC	Ì
205	11001101	0xCD	Í
206	11001110	0xCE	Î
207	11001111	0xCF	Ï
208	11010000	0xD0	Ð
209	11010001	0xD1	Ñ
210	11010010	0xD2	Ò
211	11010011	0xD3	Ó
212	11010100	0xD4	Ô
213	11010101	0xD5	Õ
214	11010110	0xD6	Ö
215	11010111	0xD7	×
216	11011000	0xD8	Ø
217	11011001	0xD9	Ù
218	11011010	0xDA	Ú
219	11011011	0xDB	Û
220	11011100	0xDC	Ü
221	11011101	0xDD	Ý
222	11011110	0xDE	Þ
223	11011111	0xDF	ß
224	11100000	0xE0	à
225	11100001	0xE1	á
226	11100010	0xE2	â
227	11100011	0xE3	ã
228	11100100	0xE4	ä
229	11100101	0xE5	å
230	11100110	0xE6	æ
231	11100111	0xE7	ç
232	11101000	0xE8	è
233	11101001	0xE9	é
234	11101010	0xEA	ê
235	11101011	0xEB	ë
236	11101100	0xEC	ì
237	11101101	0xED	í
238	11101110	0xEE	î
239	11101111	0xEF	ï
240	11110000	0xF0	ð
241	11110001	0xF1	ñ
242	11110010	0xF2	ò
243	11110011	0xF3	ó
244	11110100	0xF4	ô
245	11110101	0xF5	õ
246	11110110	0xF6	ö
247	11110111	0xF7	÷
248	11111000	0xF8	ø
249	11111001	0xF9	ù
250	11111010	0xFA	ú
251	11111011	0xFB	û
252	11111100	0xFC	ü
253	11111101	0xFD	ý
254	11111110	0xFE	þ
255	11111111	0xFF	ÿ

First 128 characters in the table above is also known as the "7-bit ASCII table", since it was developed in 1963, when one byte was 7 bits long. Over time, the byte became 8-bit, and the ASCII was extended to 256 characters keeping the first 128 characters intact. Among other things, you will use the ASCII table to learn how the Base64 algorithm works and to make it easier for you, I used 8-bit binary values.