ASCII to Binary
Convert ASCII codes to binary — decimal character codes as 8-bit bytes.
How to use ASCII to Binary
- Enter decimal ASCII codes separated by spaces — e.g. 72 105 (H and i).
- Read the binary instantly: 72 105 → 1001000 1101001.
- Pad mentally to 8 bits where byte alignment matters — 1001000 is the byte 01001000.
- Click “Copy result” to take the bit patterns into your worksheet or notes.
What is ASCII to Binary?
An ASCII to binary converter takes decimal character codes — like 72 for H — and rewrites each as binary: 72 becomes 1001000 (01001000 as a padded byte). It bridges the two ways of writing the same character data: the human-friendly decimal code and the bit pattern actually stored in memory.
It is essentially a decimal-to-binary conversion applied per code, and it completes the encoding chain taught in every computing course: character → ASCII code → binary byte. A is 65 is 01000001 — three notations, one letter.
About the ASCII to Binary
Paste one or more decimal ASCII codes separated by spaces and each converts to binary instantly: 72 105 → 1001000 1101001.
Students use it for the code-to-bits half of encoding exercises; teachers use it to build worksheets where the decimal codes are given and the bit patterns are the answer; developers use it to visualize which bits a given character sets — useful when a protocol or file format tests individual bits of a byte. Non-numeric tokens are flagged by name rather than skipped.
Conversion is exact and runs in your browser. Binary to ASCII reverses it; if you're starting from the text itself rather than the codes, Text to Binary does both steps in one go.