Free Audiobook Converter

An Easy Way to Combine MP3s or Split M4B Files

Turn a messy folder of MP3s into a single, organized audiobook. Or, break up large M4B files into individual MP3 chapters.

Get Two Free Audiobooks - Try Audible For Free

Start your free trial and discover thousands of audiobooks

A Converter Built Specifically for Audiobooks

Without complex software and confusing settings.

Combine MP3s into a Single M4B

The best way to enjoy an audiobook is as a single, organized file. Merging your MP3s into the M4B format does exactly that. An M4B file functions like a professional audiobook: it supports chapter markers for easy navigation and remembers your playback position, keeping everything tidy. Our tool makes it simple by automatically turning your filenames into a chapter list.

  • Automatic chapter markers
  • Preserves audio quality
  • Remembers playback position
chapter-01.mp3
chapter-02.mp3
chapter-03.mp3
full-audiobook.m4b

Split an M4B into Individual MP3 Chapters

Breaking a large M4B file into separate MP3s gives you maximum flexibility. Individual MP3 files are universally compatible with any audio player or device, making them easy to manage and use however you see fit. Our tool reads the embedded chapter markers from your M4B and splits it into perfectly-named MP3s, ready for you in a single ZIP download.

  • Preserves chapter names
  • Universal MP3 compatibility
  • Batch download as ZIP
full-audiobook.m4b
chapter-01.mp3
chapter-02.mp3
chapter-03.mp3

How It Works in 3 Steps

Simple, fast and free.

Upload Your Files

Drag and drop your MP3s to combine, or an M4B file to split.

Let the Magic Happen

Work happens in the background.

Download Your Audiobook

Your organized, chapterized audiobook is ready.