ASCII Code Table

Browse and search the 256-row ASCII / extended-ASCII table — decimal, hex, octal, binary, and the named control characters.

Dec	Hex	Oct	Binary	Char	Name
0	0x00	0000	00000000	—	NUL — Null
1	0x01	0001	00000001	—	SOH — Start of Heading
2	0x02	0002	00000010	—	STX — Start of Text
3	0x03	0003	00000011	—	ETX — End of Text
4	0x04	0004	00000100	—	EOT — End of Transmission
5	0x05	0005	00000101	—	ENQ — Enquiry
6	0x06	0006	00000110	—	ACK — Acknowledge
7	0x07	0007	00000111	—	BEL — Bell
8	0x08	0010	00001000	—	BS — Backspace
9	0x09	0011	00001001	—	HT — Horizontal Tab
10	0x0A	0012	00001010	—	LF — Line Feed (\n)
11	0x0B	0013	00001011	—	VT — Vertical Tab
12	0x0C	0014	00001100	—	FF — Form Feed
13	0x0D	0015	00001101	—	CR — Carriage Return (\r)
14	0x0E	0016	00001110	—	SO — Shift Out
15	0x0F	0017	00001111	—	SI — Shift In
16	0x10	0020	00010000	—	DLE — Data Link Escape
17	0x11	0021	00010001	—	DC1 — Device Control 1 (XON)
18	0x12	0022	00010010	—	DC2 — Device Control 2
19	0x13	0023	00010011	—	DC3 — Device Control 3 (XOFF)
20	0x14	0024	00010100	—	DC4 — Device Control 4
21	0x15	0025	00010101	—	NAK — Negative Acknowledge
22	0x16	0026	00010110	—	SYN — Synchronous Idle
23	0x17	0027	00010111	—	ETB — End of Trans. Block
24	0x18	0030	00011000	—	CAN — Cancel
25	0x19	0031	00011001	—	EM — End of Medium
26	0x1A	0032	00011010	—	SUB — Substitute
27	0x1B	0033	00011011	—	ESC — Escape
28	0x1C	0034	00011100	—	FS — File Separator
29	0x1D	0035	00011101	—	GS — Group Separator
30	0x1E	0036	00011110	—	RS — Record Separator
31	0x1F	0037	00011111	—	US — Unit Separator
32	0x20	0040	00100000		Space
33	0x21	0041	00100001		—
34	0x22	0042	00100010		—
35	0x23	0043	00100011		—
36	0x24	0044	00100100		—
37	0x25	0045	00100101		—
38	0x26	0046	00100110		—
39	0x27	0047	00100111		—
40	0x28	0050	00101000		—
41	0x29	0051	00101001		—
42	0x2A	0052	00101010		—
43	0x2B	0053	00101011		—
44	0x2C	0054	00101100		—
45	0x2D	0055	00101101		—
46	0x2E	0056	00101110		—
47	0x2F	0057	00101111		—
48	0x30	0060	00110000		—
49	0x31	0061	00110001		—
50	0x32	0062	00110010		—
51	0x33	0063	00110011		—
52	0x34	0064	00110100		—
53	0x35	0065	00110101		—
54	0x36	0066	00110110		—
55	0x37	0067	00110111		—
56	0x38	0070	00111000		—
57	0x39	0071	00111001		—
58	0x3A	0072	00111010		—
59	0x3B	0073	00111011		—
60	0x3C	0074	00111100		—
61	0x3D	0075	00111101		—
62	0x3E	0076	00111110		—
63	0x3F	0077	00111111		—
64	0x40	0100	01000000		—
65	0x41	0101	01000001		—
66	0x42	0102	01000010		—
67	0x43	0103	01000011		—
68	0x44	0104	01000100		—
69	0x45	0105	01000101		—
70	0x46	0106	01000110		—
71	0x47	0107	01000111		—
72	0x48	0110	01001000		—
73	0x49	0111	01001001		—
74	0x4A	0112	01001010		—
75	0x4B	0113	01001011		—
76	0x4C	0114	01001100		—
77	0x4D	0115	01001101		—
78	0x4E	0116	01001110		—
79	0x4F	0117	01001111		—
80	0x50	0120	01010000		—
81	0x51	0121	01010001		—
82	0x52	0122	01010010		—
83	0x53	0123	01010011		—
84	0x54	0124	01010100		—
85	0x55	0125	01010101		—
86	0x56	0126	01010110		—
87	0x57	0127	01010111		—
88	0x58	0130	01011000		—
89	0x59	0131	01011001		—
90	0x5A	0132	01011010		—
91	0x5B	0133	01011011		—
92	0x5C	0134	01011100		—
93	0x5D	0135	01011101		—
94	0x5E	0136	01011110		—
95	0x5F	0137	01011111		—
96	0x60	0140	01100000		—
97	0x61	0141	01100001		—
98	0x62	0142	01100010		—
99	0x63	0143	01100011		—
100	0x64	0144	01100100		—
101	0x65	0145	01100101		—
102	0x66	0146	01100110		—
103	0x67	0147	01100111		—
104	0x68	0150	01101000		—
105	0x69	0151	01101001		—
106	0x6A	0152	01101010		—
107	0x6B	0153	01101011		—
108	0x6C	0154	01101100		—
109	0x6D	0155	01101101		—
110	0x6E	0156	01101110		—
111	0x6F	0157	01101111		—
112	0x70	0160	01110000		—
113	0x71	0161	01110001		—
114	0x72	0162	01110010		—
115	0x73	0163	01110011		—
116	0x74	0164	01110100		—
117	0x75	0165	01110101		—
118	0x76	0166	01110110		—
119	0x77	0167	01110111		—
120	0x78	0170	01111000		—
121	0x79	0171	01111001		—
122	0x7A	0172	01111010		—
123	0x7B	0173	01111011		—
124	0x7C	0174	01111100		—
125	0x7D	0175	01111101		—
126	0x7E	0176	01111110		—
127	0x7F	0177	01111111	—	DEL — Delete
128	0x80	0200	10000000		—
129	0x81	0201	10000001		—
130	0x82	0202	10000010		—
131	0x83	0203	10000011		—
132	0x84	0204	10000100		—
133	0x85	0205	10000101		—
134	0x86	0206	10000110		—
135	0x87	0207	10000111		—
136	0x88	0210	10001000		—
137	0x89	0211	10001001		—
138	0x8A	0212	10001010		—
139	0x8B	0213	10001011		—
140	0x8C	0214	10001100		—
141	0x8D	0215	10001101		—
142	0x8E	0216	10001110		—
143	0x8F	0217	10001111		—
144	0x90	0220	10010000		—
145	0x91	0221	10010001		—
146	0x92	0222	10010010		—
147	0x93	0223	10010011		—
148	0x94	0224	10010100		—
149	0x95	0225	10010101		—
150	0x96	0226	10010110		—
151	0x97	0227	10010111		—
152	0x98	0230	10011000		—
153	0x99	0231	10011001		—
154	0x9A	0232	10011010		—
155	0x9B	0233	10011011		—
156	0x9C	0234	10011100		—
157	0x9D	0235	10011101		—
158	0x9E	0236	10011110		—
159	0x9F	0237	10011111		—
160	0xA0	0240	10100000		—
161	0xA1	0241	10100001		—
162	0xA2	0242	10100010		—
163	0xA3	0243	10100011		—
164	0xA4	0244	10100100		—
165	0xA5	0245	10100101		—
166	0xA6	0246	10100110		—
167	0xA7	0247	10100111		—
168	0xA8	0250	10101000		—
169	0xA9	0251	10101001		—
170	0xAA	0252	10101010		—
171	0xAB	0253	10101011		—
172	0xAC	0254	10101100		—
173	0xAD	0255	10101101		—
174	0xAE	0256	10101110		—
175	0xAF	0257	10101111		—
176	0xB0	0260	10110000		—
177	0xB1	0261	10110001		—
178	0xB2	0262	10110010		—
179	0xB3	0263	10110011		—
180	0xB4	0264	10110100		—
181	0xB5	0265	10110101		—
182	0xB6	0266	10110110		—
183	0xB7	0267	10110111		—
184	0xB8	0270	10111000		—
185	0xB9	0271	10111001		—
186	0xBA	0272	10111010		—
187	0xBB	0273	10111011		—
188	0xBC	0274	10111100		—
189	0xBD	0275	10111101		—
190	0xBE	0276	10111110		—
191	0xBF	0277	10111111		—
192	0xC0	0300	11000000		—
193	0xC1	0301	11000001		—
194	0xC2	0302	11000010		—
195	0xC3	0303	11000011		—
196	0xC4	0304	11000100		—
197	0xC5	0305	11000101		—
198	0xC6	0306	11000110		—
199	0xC7	0307	11000111		—
200	0xC8	0310	11001000		—
201	0xC9	0311	11001001		—
202	0xCA	0312	11001010		—
203	0xCB	0313	11001011		—
204	0xCC	0314	11001100		—
205	0xCD	0315	11001101		—
206	0xCE	0316	11001110		—
207	0xCF	0317	11001111		—
208	0xD0	0320	11010000		—
209	0xD1	0321	11010001		—
210	0xD2	0322	11010010		—
211	0xD3	0323	11010011		—
212	0xD4	0324	11010100		—
213	0xD5	0325	11010101		—
214	0xD6	0326	11010110		—
215	0xD7	0327	11010111		—
216	0xD8	0330	11011000		—
217	0xD9	0331	11011001		—
218	0xDA	0332	11011010		—
219	0xDB	0333	11011011		—
220	0xDC	0334	11011100		—
221	0xDD	0335	11011101		—
222	0xDE	0336	11011110		—
223	0xDF	0337	11011111		—
224	0xE0	0340	11100000		—
225	0xE1	0341	11100001		—
226	0xE2	0342	11100010		—
227	0xE3	0343	11100011		—
228	0xE4	0344	11100100		—
229	0xE5	0345	11100101		—
230	0xE6	0346	11100110		—
231	0xE7	0347	11100111		—
232	0xE8	0350	11101000		—
233	0xE9	0351	11101001		—
234	0xEA	0352	11101010		—
235	0xEB	0353	11101011		—
236	0xEC	0354	11101100		—
237	0xED	0355	11101101		—
238	0xEE	0356	11101110		—
239	0xEF	0357	11101111		—
240	0xF0	0360	11110000		—
241	0xF1	0361	11110001		—
242	0xF2	0362	11110010		—
243	0xF3	0363	11110011		—
244	0xF4	0364	11110100		—
245	0xF5	0365	11110101		—
246	0xF6	0366	11110110		—
247	0xF7	0367	11110111		—
248	0xF8	0370	11111000		—
249	0xF9	0371	11111001		—
250	0xFA	0372	11111010		—
251	0xFB	0373	11111011		—
252	0xFC	0374	11111100		—
253	0xFD	0375	11111101		—
254	0xFE	0376	11111110		—
255	0xFF	0377	11111111		—

How to use

Type a code (decimal, hex, octal, name) into the search box to filter.
Use the category tabs to narrow down to control / printable / extended ranges.
Click any character in the table to copy it to your clipboard.

About this tool

Show

A searchable table of byte values 0 to 255 in decimal, hexadecimal, octal and binary, with the character each one produces and the name of every control code. Search by code in any base or by character, filter to just the control codes, the printable range or the high bytes, and click a printable cell to copy that character. One clarification the name hides: ASCII is a 7-bit standard, so it genuinely ends at 127. The rows above that are shown with their Latin-1 meaning, which is only one of several conventions — the same byte is a different character under Windows-1252, and in UTF-8 it is not a standalone character at all but part of a multi-byte sequence.

Frequently asked questions

Are codes 128–255 standard ASCII?

No — strictly, ASCII covers 0–127. 128–255 belong to various "extended ASCII" encodings (Latin-1, Windows-1252, etc.). The characters here come from your browser's default font, which usually renders Latin-1 in this range.

What's the difference between LF and CR?

LF (\n, 10) is Unix's line break; CR (\r, 13) was used on classic Mac OS. Windows still uses CR+LF together. ASCII names them "Line Feed" and "Carriage Return" from typewriter terminology.

Why are some control characters shown as —?

Control characters (0–31, 127) have no visible glyph and can't be safely copied — they'd usually break terminals or text editors. The named description is given instead.

Is ASCII still worth knowing when everything is Unicode?

Yes, because UTF-8 was designed so that the first 128 code points are byte-for-byte identical to ASCII. Every ASCII file is already valid UTF-8, and every Unicode string that happens to be plain English encodes to exactly the same bytes it always did. That compatibility is why the table below still describes the low half of nearly every text file you will meet.

Why do the letters and digits sit at those particular numbers?

They were chosen to make the arithmetic easy. The digits start at 48, so subtracting 48 from a digit's code gives its value; upper and lower case are exactly 32 apart, which is a single bit, so case can be flipped by toggling that bit rather than by a lookup. Those two properties are still visible in the code of nearly every parser.

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