AAX Audio Converter converts Audible AAX files to MP3 or M4A/M4B and provides basic support for older AA files.
Open source
AudioBookConverter
AudioBookConverter converts MP3 audio into M4B audiobooks, building on an earlier freeipodsoftware release.
About AudioBookConverter
AudioBookConverter converts sets of audio files into a single m4b file and can also process existing m4b files. It accepts mp3, flac/cue, wma, m4a/m4b, aac and wav as sources, with output to m4b (aac), ogg (opus) and mp3 (lame). It includes chapter handling with re-import from flac (cue) and m4b, artwork handling from embedded art and cover files, and parallel encoding and queue processing.
Mac and Linux versions are described as experimental and may require skills to install and run and may not work as expected.
Key features
- Convert mp3, flac/cue, wma, m4a/m4b, aac, and wav files
- Output to m4b (aac), ogg (opus), and mp3 (lame)
- Parallel encoding and parallel processing of conversion queue
- Combine embedded MP3 artwork with cover files from directory
- Re-import chapters from flac (cue) and m4b files
- Preview audio with instant playback before encoding
Best for: People converting collections of audio files into m4b audiobooks with chapters and artwork.
Good for
- Accepts several source formats and three output formats
- Works without QuickTime or iTunes
- Open source under GPL-2.0 license
Watch out for
- Mac and Linux versions are experimental and may not work as expected
- Mac and Linux versions may require skills to install and run
AudioBookConverter at a glance
- Category
- Books & Reading › Audiobooks
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- Linux
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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AudioBookConverter FAQ
What source and output formats are supported?
Sources: mp3, flac/cue, wma, m4a/m4b, aac, wav. Outputs: m4b (aac), ogg (opus), mp3 (lame).
Do I need QuickTime or iTunes?
No, no QuickTime or iTunes is required.
How do I convert a book?
Run the program, add files, and press convert; other settings are optional.
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