What is ASCII and why is it important?

ASCII (American Standard Code for Information Interchange) is a character encoding standard that assigns numerical values (0-127) to letters, digits, punctuation, and control characters. It forms the foundation of text encoding in computers and is the basis for modern encodings like UTF-8.

What is the difference between ASCII and Unicode?

ASCII defines only 128 characters (7 bits), covering basic English letters, digits, and symbols. Unicode is a much larger standard that supports over 149,000 characters from virtually every writing system worldwide, including emojis. UTF-8, the most common Unicode encoding, is backward-compatible with ASCII.

What are ASCII control characters?

Control characters occupy ASCII codes 0-31 and 127. They are non-printable characters originally designed to control devices like printers and terminals. Common examples include NUL (0), Tab (9), Line Feed (10), Carriage Return (13), and Escape (27). Most are rarely used in modern computing.

What is Extended ASCII?

Extended ASCII uses codes 128-255 (8 bits instead of 7) to add additional characters like accented letters, line-drawing symbols, and mathematical notations. The table above shows the Latin-1 (ISO 8859-1) interpretation of codes 128-255. There is no single extended ASCII standard, so different systems (e.g., ISO 8859-1, Windows-1252) define these extra codes differently.

How do I find the ASCII code for a character?

You can look up any printable character (codes 32-126) in the ASCII table above, or use the search box to filter by decimal, hex, character, or name. In programming, functions like ord() in Python or charCodeAt() in JavaScript return a character's ASCII code. For example, the letter 'A' is 65 in decimal, 41 in hex, and 01000001 in binary.

ASCII Table Viewer

View the standard and Extended ASCII (Latin-1) table with Decimal, Hex, Octal, Binary, HTML entity, and Character representations.

ASCII & Extended ASCII Table

Filter by decimal, hex, octal, binary, character, entity, or name.

256 of 256 characters. Click any row to copy it.

Dec	Hex	Oct	Binary	Char	HTML Entity	Description
0	00	000	00000000	—	\0	NUL (Null)
1	01	001	00000001	—	—	SOH (Start of Heading)
2	02	002	00000010	—	—	STX (Start of Text)
3	03	003	00000011	—	—	ETX (End of Text)
4	04	004	00000100	—	—	EOT (End of Transmission)
5	05	005	00000101	—	—	ENQ (Enquiry)
6	06	006	00000110	—	—	ACK (Acknowledge)
7	07	007	00000111	—	\a	BEL (Bell)
8	08	010	00001000	—	\b	BS (Backspace)
9	09	011	00001001	—	\t	HT (Horizontal Tab)
10	0A	012	00001010	—	\n	LF (Line Feed)
11	0B	013	00001011	—	\v	VT (Vertical Tab)
12	0C	014	00001100	—	\f	FF (Form Feed)
13	0D	015	00001101	—	\r	CR (Carriage Return)
14	0E	016	00001110	—	—	SO (Shift Out)
15	0F	017	00001111	—	—	SI (Shift In)
16	10	020	00010000	—	—	DLE (Data Link Escape)
17	11	021	00010001	—	—	DC1 (Device Control 1)
18	12	022	00010010	—	—	DC2 (Device Control 2)
19	13	023	00010011	—	—	DC3 (Device Control 3)
20	14	024	00010100	—	—	DC4 (Device Control 4)
21	15	025	00010101	—	—	NAK (Negative Acknowledge)
22	16	026	00010110	—	—	SYN (Synchronous Idle)
23	17	027	00010111	—	—	ETB (End of Transmission Block)
24	18	030	00011000	—	—	CAN (Cancel)
25	19	031	00011001	—	—	EM (End of Medium)
26	1A	032	00011010	—	—	SUB (Substitute)
27	1B	033	00011011	—	\e	ESC (Escape)
28	1C	034	00011100	—	—	FS (File Separator)
29	1D	035	00011101	—	—	GS (Group Separator)
30	1E	036	00011110	—	—	RS (Record Separator)
31	1F	037	00011111	—	—	US (Unit Separator)
32	20	040	00100000	␣ (space)		Space
33	21	041	00100001	!	!	Printable
34	22	042	00100010	"	"	Printable
35	23	043	00100011	#	#	Printable
36	24	044	00100100	$	$	Printable
37	25	045	00100101	%	%	Printable
38	26	046	00100110	&	&	Printable
39	27	047	00100111	'	'	Printable
40	28	050	00101000	(	(	Printable
41	29	051	00101001	)	)	Printable
42	2A	052	00101010	*	*	Printable
43	2B	053	00101011	+	+	Printable
44	2C	054	00101100	,	,	Printable
45	2D	055	00101101	-	-	Printable
46	2E	056	00101110	.	.	Printable
47	2F	057	00101111	/	/	Printable
48	30	060	00110000	0	0	Printable
49	31	061	00110001	1	1	Printable
50	32	062	00110010	2	2	Printable
51	33	063	00110011	3	3	Printable
52	34	064	00110100	4	4	Printable
53	35	065	00110101	5	5	Printable
54	36	066	00110110	6	6	Printable
55	37	067	00110111	7	7	Printable
56	38	070	00111000	8	8	Printable
57	39	071	00111001	9	9	Printable
58	3A	072	00111010	:	:	Printable
59	3B	073	00111011	;	;	Printable
60	3C	074	00111100	<	<	Printable
61	3D	075	00111101	=	=	Printable
62	3E	076	00111110	>	>	Printable
63	3F	077	00111111	?	?	Printable
64	40	100	01000000	@	@	Printable
65	41	101	01000001	A	A	Printable
66	42	102	01000010	B	B	Printable
67	43	103	01000011	C	C	Printable
68	44	104	01000100	D	D	Printable
69	45	105	01000101	E	E	Printable
70	46	106	01000110	F	F	Printable
71	47	107	01000111	G	G	Printable
72	48	110	01001000	H	H	Printable
73	49	111	01001001	I	I	Printable
74	4A	112	01001010	J	J	Printable
75	4B	113	01001011	K	K	Printable
76	4C	114	01001100	L	L	Printable
77	4D	115	01001101	M	M	Printable
78	4E	116	01001110	N	N	Printable
79	4F	117	01001111	O	O	Printable
80	50	120	01010000	P	P	Printable
81	51	121	01010001	Q	Q	Printable
82	52	122	01010010	R	R	Printable
83	53	123	01010011	S	S	Printable
84	54	124	01010100	T	T	Printable
85	55	125	01010101	U	U	Printable
86	56	126	01010110	V	V	Printable
87	57	127	01010111	W	W	Printable
88	58	130	01011000	X	X	Printable
89	59	131	01011001	Y	Y	Printable
90	5A	132	01011010	Z	Z	Printable
91	5B	133	01011011	[	[	Printable
92	5C	134	01011100	\	\	Printable
93	5D	135	01011101	]	]	Printable
94	5E	136	01011110	^	^	Printable
95	5F	137	01011111	_	_	Printable
96	60	140	01100000	`	`	Printable
97	61	141	01100001	a	a	Printable
98	62	142	01100010	b	b	Printable
99	63	143	01100011	c	c	Printable
100	64	144	01100100	d	d	Printable
101	65	145	01100101	e	e	Printable
102	66	146	01100110	f	f	Printable
103	67	147	01100111	g	g	Printable
104	68	150	01101000	h	h	Printable
105	69	151	01101001	i	i	Printable
106	6A	152	01101010	j	j	Printable
107	6B	153	01101011	k	k	Printable
108	6C	154	01101100	l	l	Printable
109	6D	155	01101101	m	m	Printable
110	6E	156	01101110	n	n	Printable
111	6F	157	01101111	o	o	Printable
112	70	160	01110000	p	p	Printable
113	71	161	01110001	q	q	Printable
114	72	162	01110010	r	r	Printable
115	73	163	01110011	s	s	Printable
116	74	164	01110100	t	t	Printable
117	75	165	01110101	u	u	Printable
118	76	166	01110110	v	v	Printable
119	77	167	01110111	w	w	Printable
120	78	170	01111000	x	x	Printable
121	79	171	01111001	y	y	Printable
122	7A	172	01111010	z	z	Printable
123	7B	173	01111011	{	{	Printable
124	7C	174	01111100	\|	\|	Printable
125	7D	175	01111101	}	}	Printable
126	7E	176	01111110	~	~	Printable
127	7F	177	01111111	—	—	DEL (Delete)
128	80	200	10000000	—	—	Control
129	81	201	10000001	—	—	Control
130	82	202	10000010	—	—	Control
131	83	203	10000011	—	—	Control
132	84	204	10000100	—	—	Control
133	85	205	10000101	—	—	Control
134	86	206	10000110	—	—	Control
135	87	207	10000111	—	—	Control
136	88	210	10001000	—	—	Control
137	89	211	10001001	—	—	Control
138	8A	212	10001010	—	—	Control
139	8B	213	10001011	—	—	Control
140	8C	214	10001100	—	—	Control
141	8D	215	10001101	—	—	Control
142	8E	216	10001110	—	—	Control
143	8F	217	10001111	—	—	Control
144	90	220	10010000	—	—	Control
145	91	221	10010001	—	—	Control
146	92	222	10010010	—	—	Control
147	93	223	10010011	—	—	Control
148	94	224	10010100	—	—	Control
149	95	225	10010101	—	—	Control
150	96	226	10010110	—	—	Control
151	97	227	10010111	—	—	Control
152	98	230	10011000	—	—	Control
153	99	231	10011001	—	—	Control
154	9A	232	10011010	—	—	Control
155	9B	233	10011011	—	—	Control
156	9C	234	10011100	—	—	Control
157	9D	235	10011101	—	—	Control
158	9E	236	10011110	—	—	Control
159	9F	237	10011111	—	—	Control
160	A0	240	10100000			Extended (Latin-1)
161	A1	241	10100001	¡	¡	Extended (Latin-1)
162	A2	242	10100010	¢	¢	Extended (Latin-1)
163	A3	243	10100011	£	£	Extended (Latin-1)
164	A4	244	10100100	¤	¤	Extended (Latin-1)
165	A5	245	10100101	¥	¥	Extended (Latin-1)
166	A6	246	10100110	¦	¦	Extended (Latin-1)
167	A7	247	10100111	§	§	Extended (Latin-1)
168	A8	250	10101000	¨	¨	Extended (Latin-1)
169	A9	251	10101001	©	©	Extended (Latin-1)
170	AA	252	10101010	ª	ª	Extended (Latin-1)
171	AB	253	10101011	«	«	Extended (Latin-1)
172	AC	254	10101100	¬	¬	Extended (Latin-1)
173	AD	255	10101101			Extended (Latin-1)
174	AE	256	10101110	®	®	Extended (Latin-1)
175	AF	257	10101111	¯	¯	Extended (Latin-1)
176	B0	260	10110000	°	°	Extended (Latin-1)
177	B1	261	10110001	±	±	Extended (Latin-1)
178	B2	262	10110010	²	²	Extended (Latin-1)
179	B3	263	10110011	³	³	Extended (Latin-1)
180	B4	264	10110100	´	´	Extended (Latin-1)
181	B5	265	10110101	µ	µ	Extended (Latin-1)
182	B6	266	10110110	¶	¶	Extended (Latin-1)
183	B7	267	10110111	·	·	Extended (Latin-1)
184	B8	270	10111000	¸	¸	Extended (Latin-1)
185	B9	271	10111001	¹	¹	Extended (Latin-1)
186	BA	272	10111010	º	º	Extended (Latin-1)
187	BB	273	10111011	»	»	Extended (Latin-1)
188	BC	274	10111100	¼	¼	Extended (Latin-1)
189	BD	275	10111101	½	½	Extended (Latin-1)
190	BE	276	10111110	¾	¾	Extended (Latin-1)
191	BF	277	10111111	¿	¿	Extended (Latin-1)
192	C0	300	11000000	À	À	Extended (Latin-1)
193	C1	301	11000001	Á	Á	Extended (Latin-1)
194	C2	302	11000010	Â	Â	Extended (Latin-1)
195	C3	303	11000011	Ã	Ã	Extended (Latin-1)
196	C4	304	11000100	Ä	Ä	Extended (Latin-1)
197	C5	305	11000101	Å	Å	Extended (Latin-1)
198	C6	306	11000110	Æ	Æ	Extended (Latin-1)
199	C7	307	11000111	Ç	Ç	Extended (Latin-1)
200	C8	310	11001000	È	È	Extended (Latin-1)
201	C9	311	11001001	É	É	Extended (Latin-1)
202	CA	312	11001010	Ê	Ê	Extended (Latin-1)
203	CB	313	11001011	Ë	Ë	Extended (Latin-1)
204	CC	314	11001100	Ì	Ì	Extended (Latin-1)
205	CD	315	11001101	Í	Í	Extended (Latin-1)
206	CE	316	11001110	Î	Î	Extended (Latin-1)
207	CF	317	11001111	Ï	Ï	Extended (Latin-1)
208	D0	320	11010000	Ð	Ð	Extended (Latin-1)
209	D1	321	11010001	Ñ	Ñ	Extended (Latin-1)
210	D2	322	11010010	Ò	Ò	Extended (Latin-1)
211	D3	323	11010011	Ó	Ó	Extended (Latin-1)
212	D4	324	11010100	Ô	Ô	Extended (Latin-1)
213	D5	325	11010101	Õ	Õ	Extended (Latin-1)
214	D6	326	11010110	Ö	Ö	Extended (Latin-1)
215	D7	327	11010111	×	×	Extended (Latin-1)
216	D8	330	11011000	Ø	Ø	Extended (Latin-1)
217	D9	331	11011001	Ù	Ù	Extended (Latin-1)
218	DA	332	11011010	Ú	Ú	Extended (Latin-1)
219	DB	333	11011011	Û	Û	Extended (Latin-1)
220	DC	334	11011100	Ü	Ü	Extended (Latin-1)
221	DD	335	11011101	Ý	Ý	Extended (Latin-1)
222	DE	336	11011110	Þ	Þ	Extended (Latin-1)
223	DF	337	11011111	ß	ß	Extended (Latin-1)
224	E0	340	11100000	à	à	Extended (Latin-1)
225	E1	341	11100001	á	á	Extended (Latin-1)
226	E2	342	11100010	â	â	Extended (Latin-1)
227	E3	343	11100011	ã	ã	Extended (Latin-1)
228	E4	344	11100100	ä	ä	Extended (Latin-1)
229	E5	345	11100101	å	å	Extended (Latin-1)
230	E6	346	11100110	æ	æ	Extended (Latin-1)
231	E7	347	11100111	ç	ç	Extended (Latin-1)
232	E8	350	11101000	è	è	Extended (Latin-1)
233	E9	351	11101001	é	é	Extended (Latin-1)
234	EA	352	11101010	ê	ê	Extended (Latin-1)
235	EB	353	11101011	ë	ë	Extended (Latin-1)
236	EC	354	11101100	ì	ì	Extended (Latin-1)
237	ED	355	11101101	í	í	Extended (Latin-1)
238	EE	356	11101110	î	î	Extended (Latin-1)
239	EF	357	11101111	ï	ï	Extended (Latin-1)
240	F0	360	11110000	ð	ð	Extended (Latin-1)
241	F1	361	11110001	ñ	ñ	Extended (Latin-1)
242	F2	362	11110010	ò	ò	Extended (Latin-1)
243	F3	363	11110011	ó	ó	Extended (Latin-1)
244	F4	364	11110100	ô	ô	Extended (Latin-1)
245	F5	365	11110101	õ	õ	Extended (Latin-1)
246	F6	366	11110110	ö	ö	Extended (Latin-1)
247	F7	367	11110111	÷	÷	Extended (Latin-1)
248	F8	370	11111000	ø	ø	Extended (Latin-1)
249	F9	371	11111001	ù	ù	Extended (Latin-1)
250	FA	372	11111010	ú	ú	Extended (Latin-1)
251	FB	373	11111011	û	û	Extended (Latin-1)
252	FC	374	11111100	ü	ü	Extended (Latin-1)
253	FD	375	11111101	ý	ý	Extended (Latin-1)
254	FE	376	11111110	þ	þ	Extended (Latin-1)
255	FF	377	11111111	ÿ	ÿ	Extended (Latin-1)

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