ASCII to Binary Converter – Free Online ASCII-to-Binary Tool

Convert ASCII text to binary code instantly with this free online tool. Each character is encoded as an 8-bit binary byte, making it perfect for computer science students, developers, and anyone learning about low-level data representation. You can also decode binary back to readable ASCII text. No login or installation required — fast, reliable ASCII to binary conversion right in your browser.

Conversion Direction

How to Use the ASCII ↔ Binary Converter

Operation options:

  • ASCII → Binary: Enter plain text. Each character is encoded as an 8-bit binary byte (e.g. A → 01000001), separated by spaces.
  • Binary → ASCII: Enter space-separated 8-bit binary groups (e.g. 01001000 01101001). Each group is decoded to its ASCII character.

How to use:

  1. Paste or type your input into the Input area.
  2. Select the conversion direction: ASCII → Binary or Binary → ASCII.
  3. The result appears instantly in the Output area. Use Copy to copy your result, or Clear to reset.

Tips:

For Binary → ASCII:

  • Each binary group must be exactly 8 digits long and contain only 0s and 1s.
  • Separate bytes with spaces — e.g. 01001000 01101001 decodes to Hi.

For ASCII → Binary:

  • Every character maps to its standard 8-bit ASCII binary representation.
  • Spaces, punctuation, and special characters are all supported.