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ASCII (American Standard Code for Information Interchange) is a character encoding standard using 7-bit integers to represent 128 characters including letters, digits, punctuation, and control characters.

What is the ASCII value of A?

The ASCII value of uppercase 'A' is 65 in decimal, 41 in hexadecimal, 101 in octal, and 01000001 in binary. The HTML entity is A.

What is the difference between ASCII and Extended ASCII?

Standard ASCII uses 7 bits to encode 128 characters (0–127). Extended ASCII uses 8 bits to encode 256 characters (0–255), adding accented letters, currency symbols, and special characters in positions 128–255.

How do I use HTML entity codes for special characters?

HTML entity codes use the format &#N; where N is the decimal ASCII value. For example, A renders as 'A'. Named entities like & are also common for ampersands.

NotePackz›ASCII Table

ASCII Table — All Characters Reference

Complete ASCII character reference with decimal, hexadecimal, octal, binary values, HTML entities, and symbols. Click any row to copy the character.

ControlPrintable128 characters

Dec	Hex	Oct	Binary	Symbol / Name	HTML Entity
0	00	000	00000000	—NUL	``
1	01	001	00000001	—SOH	``
2	02	002	00000010	—STX	``
3	03	003	00000011	—ETX	``
4	04	004	00000100	—EOT	``
5	05	005	00000101	—ENQ	``
6	06	006	00000110	—ACK	``
7	07	007	00000111	—BEL	``
8	08	010	00001000	—BS	``
9	09	011	00001001	—HT	` `
10	0A	012	00001010	—LF	` `
11	0B	013	00001011	—VT	``
12	0C	014	00001100	—FF	``
13	0D	015	00001101	—CR	` `
14	0E	016	00001110	—SO	``
15	0F	017	00001111	—SI	``
16	10	020	00010000	—DLE	``
17	11	021	00010001	—DC1	``
18	12	022	00010010	—DC2	``
19	13	023	00010011	—DC3	``
20	14	024	00010100	—DC4	``
21	15	025	00010101	—NAK	``
22	16	026	00010110	—SYN	``
23	17	027	00010111	—ETB	``
24	18	030	00011000	—CAN	``
25	19	031	00011001	—EM	``
26	1A	032	00011010	—SUB	``
27	1B	033	00011011	—ESC	``
28	1C	034	00011100	—FS	``
29	1D	035	00011101	—GS	``
30	1E	036	00011110	—RS	``
31	1F	037	00011111	—US	``
32	20	040	00100000	SPC	` `
33	21	041	00100001	!!	`!`
34	22	042	00100010	""	`"`
35	23	043	00100011	##	`#`
36	24	044	00100100	$$	`$`
37	25	045	00100101	%%	`%`
38	26	046	00100110	&&	`&`
39	27	047	00100111	''	`'`
40	28	050	00101000	((	`(`
41	29	051	00101001	))	`)`
42	2A	052	00101010	**	`*`
43	2B	053	00101011	++	`+`
44	2C	054	00101100	,,	`,`
45	2D	055	00101101	--	`-`
46	2E	056	00101110	..	`.`
47	2F	057	00101111	//	`/`
48	30	060	00110000	00	`0`
49	31	061	00110001	11	`1`
50	32	062	00110010	22	`2`
51	33	063	00110011	33	`3`
52	34	064	00110100	44	`4`
53	35	065	00110101	55	`5`
54	36	066	00110110	66	`6`
55	37	067	00110111	77	`7`
56	38	070	00111000	88	`8`
57	39	071	00111001	99	`9`
58	3A	072	00111010	::	`:`
59	3B	073	00111011	;;	`;`
60	3C	074	00111100	<<	`<`
61	3D	075	00111101	==	`=`
62	3E	076	00111110	>>	`>`
63	3F	077	00111111	??	`?`
64	40	100	01000000	@@	`@`
65	41	101	01000001	AA	`A`
66	42	102	01000010	BB	`B`
67	43	103	01000011	CC	`C`
68	44	104	01000100	DD	`D`
69	45	105	01000101	EE	`E`
70	46	106	01000110	FF	`F`
71	47	107	01000111	GG	`G`
72	48	110	01001000	HH	`H`
73	49	111	01001001	II	`I`
74	4A	112	01001010	JJ	`J`
75	4B	113	01001011	KK	`K`
76	4C	114	01001100	LL	`L`
77	4D	115	01001101	MM	`M`
78	4E	116	01001110	NN	`N`
79	4F	117	01001111	OO	`O`
80	50	120	01010000	PP	`P`
81	51	121	01010001	QQ	`Q`
82	52	122	01010010	RR	`R`
83	53	123	01010011	SS	`S`
84	54	124	01010100	TT	`T`
85	55	125	01010101	UU	`U`
86	56	126	01010110	VV	`V`
87	57	127	01010111	WW	`W`
88	58	130	01011000	XX	`X`
89	59	131	01011001	YY	`Y`
90	5A	132	01011010	ZZ	`Z`
91	5B	133	01011011	[[	`[`
92	5C	134	01011100	\\	`\`
93	5D	135	01011101	]]	`]`
94	5E	136	01011110	^^	`^`
95	5F	137	01011111	__	`_`
96	60	140	01100000	``	```
97	61	141	01100001	aa	`a`
98	62	142	01100010	bb	`b`
99	63	143	01100011	cc	`c`
100	64	144	01100100	dd	`d`
101	65	145	01100101	ee	`e`
102	66	146	01100110	ff	`f`
103	67	147	01100111	gg	`g`
104	68	150	01101000	hh	`h`
105	69	151	01101001	ii	`i`
106	6A	152	01101010	jj	`j`
107	6B	153	01101011	kk	`k`
108	6C	154	01101100	ll	`l`
109	6D	155	01101101	mm	`m`
110	6E	156	01101110	nn	`n`
111	6F	157	01101111	oo	`o`
112	70	160	01110000	pp	`p`
113	71	161	01110001	qq	`q`
114	72	162	01110010	rr	`r`
115	73	163	01110011	ss	`s`
116	74	164	01110100	tt	`t`
117	75	165	01110101	uu	`u`
118	76	166	01110110	vv	`v`
119	77	167	01110111	ww	`w`
120	78	170	01111000	xx	`x`
121	79	171	01111001	yy	`y`
122	7A	172	01111010	zz	`z`
123	7B	173	01111011	{{	`{`
124	7C	174	01111100	\|\|	`\|`
125	7D	175	01111101	}}	`}`
126	7E	176	01111110	~~	`~`
127	7F	177	01111111	—DEL	``

What is ASCII?

ASCII (American Standard Code for Information Interchange) is a character encoding standard that uses 7-bit integers to represent 128 characters. It includes control characters (0–31, 127), printable characters (32–126), and was foundational to modern computing and text encoding.

Extended ASCII

Extended ASCII (128–255) adds characters beyond the standard 7-bit set, including accented letters, special symbols, and box-drawing characters. Common encodings include ISO 8859-1 (Latin-1), Windows-1252, and CP437 (used in DOS). Unicode has since superseded these.

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