ASCII Converter
Instantly convert text to ASCII decimal, binary, hexadecimal, or octal codes — and decode ASCII codes straight back into readable text.
Convert Between Text & ASCII
Choose a direction, enter your text or codes, and pick an output format to get an instant, accurate conversion.
Conversion Input
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Conversion Result
Your converted output
Common ASCII Codes
Frequently used ASCII characters and their decimal, binary, and hexadecimal equivalents.
| Character | Decimal | Binary | Hex | Octal |
|---|---|---|---|---|
| Space | 32 | 00100000 | 20 | 040 |
| A | 65 | 01000001 | 41 | 101 |
| Z | 90 | 01011010 | 5A | 132 |
| a | 97 | 01100001 | 61 | 141 |
| z | 122 | 01111010 | 7A | 172 |
| 0 | 48 | 00110000 | 30 | 060 |
| 9 | 57 | 00111001 | 39 | 071 |
| ! | 33 | 00100001 | 21 | 041 |
ASCII Converter FAQ
Everything you need to know about ASCII codes and converting between text and character encodings.
ASCII, short for American Standard Code for Information Interchange, is a character encoding standard that assigns a numeric code from 0 to 127 to each letter, digit, punctuation mark, and control character used in English text.
Each character is first converted to its ASCII decimal value, then that decimal value is converted to base 2. For example, the letter A has an ASCII decimal value of 65, which is 01000001 in 8-bit binary.
Decimal, hexadecimal, and octal are simply different number bases used to represent the same underlying ASCII code. The letter A is decimal 65, hexadecimal 41, and octal 101 — all three represent the exact same character.
No. Standard ASCII only covers 128 characters, mainly the basic English alphabet, digits, and punctuation. Accented letters, emoji, and characters from other languages require a wider encoding such as Unicode or UTF-8, which extend far beyond the original ASCII range.