ASCII to Binary Converter
Convert ascii to binary instantly — type on the left and the result appears on the right. Everything runs in your browser, nothing is uploaded.
How to convert ascii to binary
Every ASCII character maps to a number, and that number as 8 bits is its binary form. Convert ASCII text to binary one character at a time.
Method: one byte per character, using the ASCII code that maps numbers to characters.
- Take each characterWork through the text one character at a time.
- Find its ASCII codeLook up the character's code — for example A is 65.
- Write the code as binaryWrite each ASCII code as an 8-bit binary number.
Examples Hi = 01001000 01101001A = 01000001
ASCII to Binary Table
Common ascii values with their binary equivalents.
| ASCII | Binary |
|---|---|
| A | 01000001 |
| B | 01000010 |
| C | 01000011 |
| a | 01100001 |
| b | 01100010 |
| c | 01100011 |
| 0 | 00110000 |
| 1 | 00110001 |
| 9 | 00111001 |
| ! | 00100001 |
| ? | 00111111 |
| @ | 01000000 |
Related conversions
Frequently asked questions
How do you convert ASCII to binary?
Take each character's ASCII code and write it as an 8-bit binary number. 'H' is 72, which is 01001000.
What is 'A' in binary?
A is ASCII 65, which is 01000001.
How many bits per ASCII character?
Eight — one byte per character in standard 8-bit ASCII.