128 CODES · ONE COMPLETE REFERENCE

ASCII Table

Find a character, inspect its codes, or convert a whole string. This table covers standard ASCII: 0–127, including all 33 control characters.

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Character, name, or code

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Bare numbers are decimal. Use 0x41, 0o101, 0b1000001, or U+0041 for other bases. Use char:5 for the digit character 5.

128 of 128 rows shown.

A — Uppercase A

Printable ASCII · Unicode U+0041 · one byte in UTF-8

Decimal: 65
Hexadecimal: 0x41
Octal: 0o101
Binary: 01000001
JSON string: "A"
HTML decimal reference: A

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Standard ASCII codes 0–127
Decimal	Hex	Octal	Binary (8 bits)	Name
0	00	000	00000000	Null
1	01	001	00000001	Start of heading
2	02	002	00000010	Start of text
3	03	003	00000011	End of text
4	04	004	00000100	End of transmission
5	05	005	00000101	Enquiry
6	06	006	00000110	Acknowledge
7	07	007	00000111	Bell
8	08	010	00001000	Backspace
9	09	011	00001001	Horizontal tab
10	0A	012	00001010	Line feed
11	0B	013	00001011	Vertical tab
12	0C	014	00001100	Form feed
13	0D	015	00001101	Carriage return
14	0E	016	00001110	Shift out
15	0F	017	00001111	Shift in
16	10	020	00010000	Data link escape
17	11	021	00010001	Device control 1
18	12	022	00010010	Device control 2
19	13	023	00010011	Device control 3
20	14	024	00010100	Device control 4
21	15	025	00010101	Negative acknowledge
22	16	026	00010110	Synchronous idle
23	17	027	00010111	End of transmission block
24	18	030	00011000	Cancel
25	19	031	00011001	End of medium
26	1A	032	00011010	Substitute
27	1B	033	00011011	Escape
28	1C	034	00011100	File separator
29	1D	035	00011101	Group separator
30	1E	036	00011110	Record separator
31	1F	037	00011111	Unit separator
32	20	040	00100000	Space
33	21	041	00100001	Exclamation mark
34	22	042	00100010	Quotation mark
35	23	043	00100011	Number sign
36	24	044	00100100	Dollar sign
37	25	045	00100101	Percent sign
38	26	046	00100110	Ampersand
39	27	047	00100111	Apostrophe
40	28	050	00101000	Left parenthesis
41	29	051	00101001	Right parenthesis
42	2A	052	00101010	Asterisk
43	2B	053	00101011	Plus sign
44	2C	054	00101100	Comma
45	2D	055	00101101	Hyphen-minus
46	2E	056	00101110	Full stop
47	2F	057	00101111	Solidus (slash)
48	30	060	00110000	Digit 0
49	31	061	00110001	Digit 1
50	32	062	00110010	Digit 2
51	33	063	00110011	Digit 3
52	34	064	00110100	Digit 4
53	35	065	00110101	Digit 5
54	36	066	00110110	Digit 6
55	37	067	00110111	Digit 7
56	38	070	00111000	Digit 8
57	39	071	00111001	Digit 9
58	3A	072	00111010	Colon
59	3B	073	00111011	Semicolon
60	3C	074	00111100	Less-than sign
61	3D	075	00111101	Equals sign
62	3E	076	00111110	Greater-than sign
63	3F	077	00111111	Question mark
64	40	100	01000000	Commercial at
65	41	101	01000001	Uppercase A
66	42	102	01000010	Uppercase B
67	43	103	01000011	Uppercase C
68	44	104	01000100	Uppercase D
69	45	105	01000101	Uppercase E
70	46	106	01000110	Uppercase F
71	47	107	01000111	Uppercase G
72	48	110	01001000	Uppercase H
73	49	111	01001001	Uppercase I
74	4A	112	01001010	Uppercase J
75	4B	113	01001011	Uppercase K
76	4C	114	01001100	Uppercase L
77	4D	115	01001101	Uppercase M
78	4E	116	01001110	Uppercase N
79	4F	117	01001111	Uppercase O
80	50	120	01010000	Uppercase P
81	51	121	01010001	Uppercase Q
82	52	122	01010010	Uppercase R
83	53	123	01010011	Uppercase S
84	54	124	01010100	Uppercase T
85	55	125	01010101	Uppercase U
86	56	126	01010110	Uppercase V
87	57	127	01010111	Uppercase W
88	58	130	01011000	Uppercase X
89	59	131	01011001	Uppercase Y
90	5A	132	01011010	Uppercase Z
91	5B	133	01011011	Left square bracket
92	5C	134	01011100	Reverse solidus (backslash)
93	5D	135	01011101	Right square bracket
94	5E	136	01011110	Circumflex accent (caret)
95	5F	137	01011111	Low line (underscore)
96	60	140	01100000	Grave accent (backtick)
97	61	141	01100001	Lowercase a
98	62	142	01100010	Lowercase b
99	63	143	01100011	Lowercase c
100	64	144	01100100	Lowercase d
101	65	145	01100101	Lowercase e
102	66	146	01100110	Lowercase f
103	67	147	01100111	Lowercase g
104	68	150	01101000	Lowercase h
105	69	151	01101001	Lowercase i
106	6A	152	01101010	Lowercase j
107	6B	153	01101011	Lowercase k
108	6C	154	01101100	Lowercase l
109	6D	155	01101101	Lowercase m
110	6E	156	01101110	Lowercase n
111	6F	157	01101111	Lowercase o
112	70	160	01110000	Lowercase p
113	71	161	01110001	Lowercase q
114	72	162	01110010	Lowercase r
115	73	163	01110011	Lowercase s
116	74	164	01110100	Lowercase t
117	75	165	01110101	Lowercase u
118	76	166	01110110	Lowercase v
119	77	167	01110111	Lowercase w
120	78	170	01111000	Lowercase x
121	79	171	01111001	Lowercase y
122	7A	172	01111010	Lowercase z
123	7B	173	01111011	Left curly bracket
124	7C	174	01111100	Vertical line
125	7D	175	01111101	Right curly bracket
126	7E	176	01111110	Tilde
127	7F	177	01111111	Delete

Convert text and ASCII codes

Convert up to 4,096 ASCII characters. Text spaces and line breaks count as characters. Numeric tokens must be separated by whitespace or a single comma.

ASCII converter

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Text mode preserves leading and trailing spaces. Only U+0000–U+007F is accepted. The literal text \n is two characters; press Enter for a line break.

Enter text, then choose Convert.

Converted result

Codes are separated by spaces. Decoded text is shown as a JSON string: quotes and visible escapes are part of the displayed result and its export.

How to read and use the ASCII table

Search for a character, control name, or exact code. For example, A, 65, and 0x41 identify the same character. Numeric searches without a prefix always mean decimal.
Select its character button to compare bases and choose the exact representation you want to copy. Binary can show seven significant ASCII positions or an eight-bit byte with a leading zero.
Use the converter for multiple characters. For example, Hi! becomes hexadecimal 48 69 21. To decode, select Codes → text and supply the same separated tokens.

Printable characters, controls, and line endings

ASCII has 128 positions. Codes 32–126 are the 95 printable positions, including space. Codes 0–31 and 127 (DEL) are the 33 controls. A control’s mnemonic, such as LF, is a readable label; it is not the text stored by that byte. In JSON strings, tab is \t, line feed is \n, and carriage return is \r. Other controls may appear as \u0000-style escapes.

LF is decimal 10; CR is decimal 13. CRLF is a pair of characters, 0D 0A in hex. Browsers normalize textarea line endings to LF, so use numeric input when inspecting an exact CR or CRLF sequence. The JSON result preserves that distinction using visible escapes.

Strict inputs prevent misleading output

Each numeric token must contain a complete unsigned integer in the selected base. Hex allows an optional 0x prefix, binary 0b, and octal 0o. Tokens are separated by spaces, tabs, newlines, or a single comma with optional surrounding whitespace. Empty comma entries, fractions, signed values, incomplete prefixes, and values above 127 are rejected. Contiguous hex such as 4869 is one out-of-range value, not an automatically split byte stream.

“Extended ASCII” is not one universal character set. Bytes 128–255 depend on a named encoding or code page and are outside this table. Accented letters, curly quotes, and emoji are rejected rather than silently changed. Standard ASCII maps to the same single-byte values in UTF-8; that does not make every Unicode character ASCII.

HTML references are a separate representation

For printable ASCII, a decimal HTML reference such as & represents an ampersand. This tool deliberately does not offer HTML references for controls: for example,  produces a replacement character in an HTML parser. These references are not raw ASCII bytes, and the tool is not a full HTML encoder or entity decoder.

Privacy, exports, and standards

This tool sends no entered text or code sequences to a server and uses no local storage. Copy requires browser clipboard support; if copying is unavailable, the visible value is selected for manual copying. CSV downloads contain only the currently visible table rows; printable symbols are JSON-quoted to preserve whitespace and avoid spreadsheet formula interpretation. Conversion downloads contain exactly the displayed output, including JSON quotes and escapes when decoding.

The reference follows RFC 20’s ASCII table, the ASCII-compatible byte range in RFC 3629 (UTF-8), and the HTML numeric character reference rules.