ASCII Table with Descriptions – Machine Vision Software Code Reference

Engineering

ASCII, acronym for “American Standard Code for Information Interchange”, was developed in the 1960’s but is still in important use today. We often need access to the ASCII table when coding our applications. Therefore, the following is a handy reference that we’d like to share with fellow engineers.

The standard table has 128 characters, using 7-bits with the 8th bit as a parity check. The term “Extended ASCII Code” is somewhat unclear, as the character set depends on which encoding (ie. language) it is applying to. If unstated, it typically refers to using the ISO 8859-1 encoding (also known as ISO Latin-1). It is particularly recommended to thoroughly test when involving the use of “extended ASCII code”.

Also, since it was developed in the 60’s, a lot of the control characters are outdated (unless we bring back the typewriters!).

ASCII Table (American Standard Code for Information Interchange)

Decimal	Hex	Char	Notes
0	00	[NUL]	Null character
1	01	[SOH]	Start of Heading
2	02	[STX]	Start of Text
3	03	[ETX]	End of Text
4	04	[EOT]	End of Transmission
5	05	[ENQ]	Enquiry – a response is requested
6	06	[ACK]	Acknowledgement – receiver received message
7	07	[BEL]	Bell – ring teletypewriter bell, or part of the sound effects from Applesoft days!
8	08	[BS]	Backspace
9	09	[HT]	Horizontal Tab
10	0A	[LF]	Line Feed – keep horizontal spacing in next line
11	0B	[VT]	Vertical Tab
12	0C	[FF]	Form Feed – sets the cursor to the tab of a previous line
13	0D	[CR]	Carriage Return – removes all tabs and sets cursor to the first position in the line
14	0E	[SO]	Shift Out
15	0F	[SI]	Shift In
16	10	[DLE]	Data Line Escape
17	11	[DC1]	Device Control 1 (often X-On)
18	12	[DC2]	Device Control 2
19	13	[DC3]	Device Control 3 (often X-Off)
20	14	[DC4]	Device Control 4
21	15	[NAK]	Negative Acknowledgement – give negative response
22	16	[SYN]	Synchronous Idle
23	17	[ETB]	End of Transmit Block
24	18	[CAN]	Cancel
25	19	[EM]	End of Medium
26	1A	[SUB]	Substitute
27	1B	[ESC]	Escape
28	1C	[FS]	File Separator
29	1D	[GS]	Group Separator
30	1E	[RS]	Record Separator
31	1F	[US]	Unit Separator
32	20	[SP]	Space
33	21	!	(Printable character)
34	22	“	(Printable character)
35	23	#	(Printable character)
36	24	$	(Printable character)
37	25	%	(Printable character)
38	26	&	(Printable character)
39	27	‘	(Printable character)
40	28	(	(Printable character)
41	29	)	(Printable character)
42	2A	*	(Printable character)
43	2B	+	(Printable character)
44	2C	,	(Printable character)
45	2D	–	(Printable character)
46	2E	.	(Printable character)
47	2F	/	(Printable character)
48	30	0	(Printable character)
49	31	1	(Printable character)
50	32	2	(Printable character)
51	33	3	(Printable character)
52	34	4	(Printable character)
53	35	5	(Printable character)
54	36	6	(Printable character)
55	37	7	(Printable character)
56	38	8	(Printable character)
57	39	9	(Printable character)
58	3A	:	(Printable character)
59	3B	;	(Printable character)
60	3C	<	(Printable character)
61	3D	=	(Printable character)
62	3E	>	(Printable character)
63	3F	?	(Printable character)
64	40	@	(Printable character)
65	41	A	(Printable character)
66	42	B	(Printable character)
67	43	C	(Printable character)
68	44	D	(Printable character)
69	45	E	(Printable character)
70	46	F	(Printable character)
71	47	G	(Printable character)
72	48	H	(Printable character)
73	49	I	(Printable character)
74	4A	J	(Printable character)
75	4B	K	(Printable character)
76	4C	L	(Printable character)
77	4D	M	(Printable character)
78	4E	N	(Printable character)
79	4F	O	(Printable character)
80	50	P	(Printable character)
81	51	Q	(Printable character)
82	52	R	(Printable character)
83	53	S	(Printable character)
84	54	T	(Printable character)
85	55	U	(Printable character)
86	56	V	(Printable character)
87	57	W	(Printable character)
88	58	X	(Printable character)
89	59	Y	(Printable character)
90	5A	Z	(Printable character)
91	5B	[	(Printable character)
92	5C	\	(Printable character)
93	5D	]	(Printable character)
94	5E	^	(Printable character)
95	5F	_	(Printable character)
96	60	`	(Printable character)
97	61	a	(Printable character)
98	62	b	(Printable character)
99	63	c	(Printable character)
100	64	d	(Printable character)
101	65	e	(Printable character)
102	66	f	(Printable character)
103	67	g	(Printable character)
104	68	h	(Printable character)
105	69	i	(Printable character)
106	6A	j	(Printable character)
107	6B	k	(Printable character)
108	6C	l	(Printable character)
109	6D	m	(Printable character)
110	6E	n	(Printable character)
111	6F	o	(Printable character)
112	70	p	(Printable character)
113	71	q	(Printable character)
114	72	r	(Printable character)
115	73	s	(Printable character)
116	74	t	(Printable character)
117	75	u	(Printable character)
118	76	v	(Printable character)
119	77	w	(Printable character)
120	78	x	(Printable character)
121	79	y	(Printable character)
122	7A	z	(Printable character)
123	7B	{	(Printable character)
124	7C	\|	(Printable character)
125	7D	}	(Printable character)
126	7E	~	(Printable character)
127	7F	[DEL]	Delete

Extended ASCII Codes (full 8-bits) for Latin Alphabets

Decimal	Hex	Char	Notes
128	80	€	(Printable character)
129	81
130	82	‚	(Printable character)
131	83	ƒ	(Printable character)
132	84	„	(Printable character)
133	85	…	(Printable character)
134	86	†	(Printable character)
135	87	‡	(Printable character)
136	88	ˆ	(Printable character)
137	89	‰	(Printable character)
138	8A	Š	(Printable character)
139	8B	‹	(Printable character)
140	8C	Œ	(Printable character)
141	8D
142	8E	Ž	(Printable character)
143	8F
144	90
145	91	‘	(Printable character)
146	92	’	(Printable character)
147	93	“	(Printable character)
148	94	”	(Printable character)
149	95	•	(Printable character)
150	96	–	(Printable character)
151	97	—	(Printable character)
152	98	˜	(Printable character)
153	99	™	(Printable character)
154	9A	š	(Printable character)
155	9B	›	(Printable character)
156	9C	œ	(Printable character)
157	9D
158	9E	ž	(Printable character)
159	9F	Ÿ	(Printable character)
160	A0
161	A1	¡	(Printable character)
162	A2	¢	(Printable character)
163	A3	£	(Printable character)
164	A4	¤	(Printable character)
165	A5	¥	(Printable character)
166	A6	¦	(Printable character)
167	A7	§	(Printable character)
168	A8	¨	(Printable character)
169	A9	©	(Printable character)
170	AA	ª	(Printable character)
171	AB	«	(Printable character)
172	AC	¬	(Printable character)
173	AD	-	(Printable character)
174	AE	®	(Printable character)
175	AF	¯	(Printable character)
176	B0	°	(Printable character)
177	B1	±	(Printable character)
178	B2	²	(Printable character)
179	B3	³	(Printable character)
180	B4	´	(Printable character)
181	B5	µ	(Printable character)
182	B6	¶	(Printable character)
183	B7	·	(Printable character)
184	B8	¸	(Printable character)
185	B9	¹	(Printable character)
186	BA	º	(Printable character)
187	BB	»	(Printable character)
188	BC	¼	(Printable character)
189	BD	½	(Printable character)
190	BE	¾	(Printable character)
191	BF	¿	(Printable character)
192	C0	À	(Printable character)
193	C1	Á	(Printable character)
194	C2	Â	(Printable character)
195	C3	Ã	(Printable character)
196	C4	Ä	(Printable character)
197	C5	Å	(Printable character)
198	C6	Æ	(Printable character)
199	C7	Ç	(Printable character)
200	C8	È	(Printable character)
201	C9	É	(Printable character)
202	CA	Ê	(Printable character)
203	CB	Ë	(Printable character)
204	CC	Ì	(Printable character)
205	CD	Í	(Printable character)
206	CE	Î	(Printable character)
207	CF	Ï	(Printable character)
208	D0	Ð	(Printable character)
209	D1	Ñ	(Printable character)
210	D2	Ò	(Printable character)
211	D3	Ó	(Printable character)
212	D4	Ô	(Printable character)
213	D5	Õ	(Printable character)
214	D6	Ö	(Printable character)
215	D7	×	(Printable character)
216	D8	Ø	(Printable character)
217	D9	Ù	(Printable character)
218	DA	Ú	(Printable character)
219	DB	Û	(Printable character)
220	DC	Ü	(Printable character)
221	DD	Ý	(Printable character)
222	DE	Þ	(Printable character)
223	DF	ß	(Printable character)
224	E0	à	(Printable character)
225	E1	á	(Printable character)
226	E2	â	(Printable character)
227	E3	ã	(Printable character)
228	E4	ä	(Printable character)
229	E5	å	(Printable character)
230	E6	æ	(Printable character)
231	E7	ç	(Printable character)
232	E8	è	(Printable character)
233	E9	é	(Printable character)
234	EA	ê	(Printable character)
235	EB	ë	(Printable character)
236	EC	ì	(Printable character)
237	ED	í	(Printable character)
238	EE	î	(Printable character)
239	EF	ï	(Printable character)
240	F0	ð	(Printable character)
241	F1	ñ	(Printable character)
242	F2	ò	(Printable character)
243	F3	ó	(Printable character)
244	F4	ô	(Printable character)
245	F5	õ	(Printable character)
246	F6	ö	(Printable character)
247	F7	÷	(Printable character)
248	F8	ø	(Printable character)
249	F9	ù	(Printable character)
250	FA	ú	(Printable character)
251	FB	û	(Printable character)
252	FC	ü	(Printable character)
253	FD	ý	(Printable character)
254	FE	þ	(Printable character)
255	FF	ÿ	(Printable character)