ASCII (American Standard Code for Information Interchange) assigns a unique numeric code to each character.
Standard ASCII covers 0–127: control characters (0–31), printable characters (32–126), and DEL (127).
Extended ASCII (128–255) covers international characters, symbols, and accented letters (ISO 8859-1 / Windows-1252).
| Dec | Hex | Char | Description |
| 0 | 0x00 | NUL | Null character |
| 1 | 0x01 | SOH | Start of Heading |
| 2 | 0x02 | STX | Start of Text |
| 3 | 0x03 | ETX | End of Text |
| 4 | 0x04 | EOT | End of Transmission |
| 5 | 0x05 | ENQ | Enquiry |
| 6 | 0x06 | ACK | Acknowledge |
| 7 | 0x07 | BEL | Bell |
| 8 | 0x08 | BS | Backspace |
| 9 | 0x09 | TAB | Horizontal Tab |
| 10 | 0x0A | LF | Line Feed |
| 11 | 0x0B | VT | Vertical Tab |
| 12 | 0x0C | FF | Form Feed |
| 13 | 0x0D | CR | Carriage Return |
| 14 | 0x0E | SO | Shift Out |
| 15 | 0x0F | SI | Shift In |
| 16 | 0x10 | DLE | Data Link Escape |
| 17 | 0x11 | DC1 | Device Control 1 (XON) |
| 18 | 0x12 | DC2 | Device Control 2 |
| 19 | 0x13 | DC3 | Device Control 3 (XOFF) |
| 20 | 0x14 | DC4 | Device Control 4 |
| 21 | 0x15 | NAK | Negative Acknowledge |
| 22 | 0x16 | SYN | Synchronous Idle |
| 23 | 0x17 | ETB | End of Transmission Block |
| 24 | 0x18 | CAN | Cancel |
| 25 | 0x19 | EM | End of Medium |
| 26 | 0x1A | SUB | Substitute |
| 27 | 0x1B | ESC | Escape |
| 28 | 0x1C | FS | File Separator |
| 29 | 0x1D | GS | Group Separator |
| 30 | 0x1E | RS | Record Separator |
| 31 | 0x1F | US | Unit Separator |
| 32 | 0x20 | (sp) | Space |
| 33 | 0x21 | ! | Exclamation mark |
| 34 | 0x22 | " | Double quote |
| 35 | 0x23 | # | Number sign / Hash |
| 36 | 0x24 | $ | Dollar sign |
| 37 | 0x25 | % | Percent sign |
| 38 | 0x26 | & | Ampersand |
| 39 | 0x27 | ' | Single quote / Apostrophe |
| 40 | 0x28 | ( | Left parenthesis |
| 41 | 0x29 | ) | Right parenthesis |
| 42 | 0x2A | * | Asterisk |
| 43 | 0x2B | + | Plus sign |
| 44 | 0x2C | , | Comma |
| 45 | 0x2D | - | Hyphen / Minus |
| 46 | 0x2E | . | Period / Full stop |
| 47 | 0x2F | / | Slash / Forward slash |
| 48 | 0x30 | 0 | Digit zero |
| 49 | 0x31 | 1 | Digit one |
| 50 | 0x32 | 2 | Digit two |
| 51 | 0x33 | 3 | Digit three |
| 52 | 0x34 | 4 | Digit four |
| 53 | 0x35 | 5 | Digit five |
| 54 | 0x36 | 6 | Digit six |
| 55 | 0x37 | 7 | Digit seven |
| 56 | 0x38 | 8 | Digit eight |
| 57 | 0x39 | 9 | Digit nine |
| 58 | 0x3A | : | Colon |
| 59 | 0x3B | ; | Semicolon |
| 60 | 0x3C | < | Less than |
| 61 | 0x3D | = | Equals sign |
| 62 | 0x3E | > | Greater than |
| 63 | 0x3F | ? | Question mark |
| 64 | 0x40 | @ | At sign |
| 65 | 0x41 | A | Uppercase A |
| 66 | 0x42 | B | Uppercase B |
| 67 | 0x43 | C | Uppercase C |
| 68 | 0x44 | D | Uppercase D |
| 69 | 0x45 | E | Uppercase E |
| 70 | 0x46 | F | Uppercase F |
| 71 | 0x47 | G | Uppercase G |
| 72 | 0x48 | H | Uppercase H |
| 73 | 0x49 | I | Uppercase I |
| 74 | 0x4A | J | Uppercase J |
| 75 | 0x4B | K | Uppercase K |
| 76 | 0x4C | L | Uppercase L |
| 77 | 0x4D | M | Uppercase M |
| 78 | 0x4E | N | Uppercase N |
| 79 | 0x4F | O | Uppercase O |
| 80 | 0x50 | P | Uppercase P |
| 81 | 0x51 | Q | Uppercase Q |
| 82 | 0x52 | R | Uppercase R |
| 83 | 0x53 | S | Uppercase S |
| 84 | 0x54 | T | Uppercase T |
| 85 | 0x55 | U | Uppercase U |
| 86 | 0x56 | V | Uppercase V |
| 87 | 0x57 | W | Uppercase W |
| 88 | 0x58 | X | Uppercase X |
| 89 | 0x59 | Y | Uppercase Y |
| 90 | 0x5A | Z | Uppercase Z |
| 91 | 0x5B | [ | Left square bracket |
| 92 | 0x5C | \ | Backslash |
| 93 | 0x5D | ] | Right square bracket |
| 94 | 0x5E | ^ | Caret / Circumflex |
| 95 | 0x5F | _ | Underscore |
| 96 | 0x60 | ` | Grave accent / Backtick |
| 97 | 0x61 | a | Lowercase a |
| 98 | 0x62 | b | Lowercase b |
| 99 | 0x63 | c | Lowercase c |
| 100 | 0x64 | d | Lowercase d |
| 101 | 0x65 | e | Lowercase e |
| 102 | 0x66 | f | Lowercase f |
| 103 | 0x67 | g | Lowercase g |
| 104 | 0x68 | h | Lowercase h |
| 105 | 0x69 | i | Lowercase i |
| 106 | 0x6A | j | Lowercase j |
| 107 | 0x6B | k | Lowercase k |
| 108 | 0x6C | l | Lowercase l |
| 109 | 0x6D | m | Lowercase m |
| 110 | 0x6E | n | Lowercase n |
| 111 | 0x6F | o | Lowercase o |
| 112 | 0x70 | p | Lowercase p |
| 113 | 0x71 | q | Lowercase q |
| 114 | 0x72 | r | Lowercase r |
| 115 | 0x73 | s | Lowercase s |
| 116 | 0x74 | t | Lowercase t |
| 117 | 0x75 | u | Lowercase u |
| 118 | 0x76 | v | Lowercase v |
| 119 | 0x77 | w | Lowercase w |
| 120 | 0x78 | x | Lowercase x |
| 121 | 0x79 | y | Lowercase y |
| 122 | 0x7A | z | Lowercase z |
| 123 | 0x7B | { | Left curly brace |
| 124 | 0x7C | | | Vertical bar / Pipe |
| 125 | 0x7D | } | Right curly brace |
| 126 | 0x7E | ~ | Tilde |
| 127 | 0x7F | DEL | Delete |
| 128 | 0x80 | | Euro sign |
| 129 | 0x81 | | (unused) |
| 130 | 0x82 | | Single low-9 quotation mark |
| 131 | 0x83 | | Latin small f with hook |
| 132 | 0x84 | | Double low-9 quotation mark |
| 133 | 0x85 |
| Horizontal ellipsis |
| 134 | 0x86 | | Dagger |
| 135 | 0x87 | | Double dagger |
| 136 | 0x88 | | Modifier circumflex accent |
| 137 | 0x89 | | Per mille sign |
| 138 | 0x8A | | Latin capital S with caron |
| 139 | 0x8B | | Single left-pointing angle quotation |
| 140 | 0x8C | | Latin capital ligature OE |
| 141 | 0x8D | | (unused) |
| 142 | 0x8E | | Latin capital Z with caron |
| 143 | 0x8F | | (unused) |
| 144 | 0x90 | | (unused) |
| 145 | 0x91 | | Left single quotation mark |
| 146 | 0x92 | | Right single quotation mark |
| 147 | 0x93 | | Left double quotation mark |
| 148 | 0x94 | | Right double quotation mark |
| 149 | 0x95 | | Bullet |
| 150 | 0x96 | | En dash |
| 151 | 0x97 | | Em dash |
| 152 | 0x98 | | Small tilde |
| 153 | 0x99 | | Trade mark sign |
| 154 | 0x9A | | Latin small s with caron |
| 155 | 0x9B | | Single right-pointing angle quotation |
| 156 | 0x9C | | Latin small ligature oe |
| 157 | 0x9D | | (unused) |
| 158 | 0x9E | | Latin small z with caron |
| 159 | 0x9F | | Latin capital Y with diaeresis |
| 160 | 0xA0 | | Non-breaking space |
| 161 | 0xA1 | ¡ | Inverted exclamation mark |
| 162 | 0xA2 | ¢ | Cent sign |
| 163 | 0xA3 | £ | Pound sign |
| 164 | 0xA4 | ¤ | Currency sign |
| 165 | 0xA5 | ¥ | Yen sign |
| 166 | 0xA6 | ¦ | Broken bar |
| 167 | 0xA7 | § | Section sign |
| 168 | 0xA8 | ¨ | Diaeresis / Umlaut |
| 169 | 0xA9 | © | Copyright sign |
| 170 | 0xAA | ª | Feminine ordinal indicator |
| 171 | 0xAB | « | Left-pointing double angle quotation |
| 172 | 0xAC | ¬ | Not sign |
| 173 | 0xAD | | Soft hyphen |
| 174 | 0xAE | ® | Registered sign |
| 175 | 0xAF | ¯ | Macron / Overline |
| 176 | 0xB0 | ° | Degree sign |
| 177 | 0xB1 | ± | Plus-minus sign |
| 178 | 0xB2 | ² | Superscript two |
| 179 | 0xB3 | ³ | Superscript three |
| 180 | 0xB4 | ´ | Acute accent |
| 181 | 0xB5 | µ | Micro sign |
| 182 | 0xB6 | ¶ | Pilcrow / Paragraph sign |
| 183 | 0xB7 | · | Middle dot |
| 184 | 0xB8 | ¸ | Cedilla |
| 185 | 0xB9 | ¹ | Superscript one |
| 186 | 0xBA | º | Masculine ordinal indicator |
| 187 | 0xBB | » | Right-pointing double angle quotation |
| 188 | 0xBC | ¼ | Vulgar fraction one quarter |
| 189 | 0xBD | ½ | Vulgar fraction one half |
| 190 | 0xBE | ¾ | Vulgar fraction three quarters |
| 191 | 0xBF | ¿ | Inverted question mark |
| 192 | 0xC0 | À | Latin capital A with grave |
| 193 | 0xC1 | Á | Latin capital A with acute |
| 194 | 0xC2 | Â | Latin capital A with circumflex |
| 195 | 0xC3 | Ã | Latin capital A with tilde |
| 196 | 0xC4 | Ä | Latin capital A with diaeresis |
| 197 | 0xC5 | Å | Latin capital A with ring above |
| 198 | 0xC6 | Æ | Latin capital AE |
| 199 | 0xC7 | Ç | Latin capital C with cedilla |
| 200 | 0xC8 | È | Latin capital E with grave |
| 201 | 0xC9 | É | Latin capital E with acute |
| 202 | 0xCA | Ê | Latin capital E with circumflex |
| 203 | 0xCB | Ë | Latin capital E with diaeresis |
| 204 | 0xCC | Ì | Latin capital I with grave |
| 205 | 0xCD | Í | Latin capital I with acute |
| 206 | 0xCE | Î | Latin capital I with circumflex |
| 207 | 0xCF | Ï | Latin capital I with diaeresis |
| 208 | 0xD0 | Ð | Latin capital Eth |
| 209 | 0xD1 | Ñ | Latin capital N with tilde |
| 210 | 0xD2 | Ò | Latin capital O with grave |
| 211 | 0xD3 | Ó | Latin capital O with acute |
| 212 | 0xD4 | Ô | Latin capital O with circumflex |
| 213 | 0xD5 | Õ | Latin capital O with tilde |
| 214 | 0xD6 | Ö | Latin capital O with diaeresis |
| 215 | 0xD7 | × | Multiplication sign |
| 216 | 0xD8 | Ø | Latin capital O with stroke |
| 217 | 0xD9 | Ù | Latin capital U with grave |
| 218 | 0xDA | Ú | Latin capital U with acute |
| 219 | 0xDB | Û | Latin capital U with circumflex |
| 220 | 0xDC | Ü | Latin capital U with diaeresis |
| 221 | 0xDD | Ý | Latin capital Y with acute |
| 222 | 0xDE | Þ | Latin capital Thorn |
| 223 | 0xDF | ß | Latin small sharp s (Eszett) |
| 224 | 0xE0 | à | Latin small a with grave |
| 225 | 0xE1 | á | Latin small a with acute |
| 226 | 0xE2 | â | Latin small a with circumflex |
| 227 | 0xE3 | ã | Latin small a with tilde |
| 228 | 0xE4 | ä | Latin small a with diaeresis |
| 229 | 0xE5 | å | Latin small a with ring above |
| 230 | 0xE6 | æ | Latin small ae |
| 231 | 0xE7 | ç | Latin small c with cedilla |
| 232 | 0xE8 | è | Latin small e with grave |
| 233 | 0xE9 | é | Latin small e with acute |
| 234 | 0xEA | ê | Latin small e with circumflex |
| 235 | 0xEB | ë | Latin small e with diaeresis |
| 236 | 0xEC | ì | Latin small i with grave |
| 237 | 0xED | í | Latin small i with acute |
| 238 | 0xEE | î | Latin small i with circumflex |
| 239 | 0xEF | ï | Latin small i with diaeresis |
| 240 | 0xF0 | ð | Latin small eth |
| 241 | 0xF1 | ñ | Latin small n with tilde |
| 242 | 0xF2 | ò | Latin small o with grave |
| 243 | 0xF3 | ó | Latin small o with acute |
| 244 | 0xF4 | ô | Latin small o with circumflex |
| 245 | 0xF5 | õ | Latin small o with tilde |
| 246 | 0xF6 | ö | Latin small o with diaeresis |
| 247 | 0xF7 | ÷ | Division sign |
| 248 | 0xF8 | ø | Latin small o with stroke |
| 249 | 0xF9 | ù | Latin small u with grave |
| 250 | 0xFA | ú | Latin small u with acute |
| 251 | 0xFB | û | Latin small u with circumflex |
| 252 | 0xFC | ü | Latin small u with diaeresis |
| 253 | 0xFD | ý | Latin small y with acute |
| 254 | 0xFE | þ | Latin small thorn |
| 255 | 0xFF | ÿ | Latin small y with diaeresis |