Units Converter

MP3 to M4B converter

On your device

Convert MP3 to M4B in your browser. Add your files, adjust the available settings, and download M4B files. No file upload or account required.

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Enable JavaScript to choose files and convert them on your device. The format information and conversion instructions below remain available.

M4B to MP3MP3 to multiple formatsBatch to M4B

Convert MP3 to

All outputs
MP3 to 3G2MP3 to 3GPMP3 to AACMP3 to AC3MP3 to AIFMP3 to AIFCMP3 to AIFFMP3 to ALAC

How to convert MP3 to M4B

  1. Choose your MP3 files.
  2. Keep M4B selected. Open Settings to adjust available options.
  3. Select Convert, then download the result or a ZIP of completed files.