Click the "Select File" button above, and choose your M4B file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert M4B to another file type
To convert M4B audiobooks to another format, you need Apple iTunes or other Audio software.
Convert a file to M4B
To convert other file formats to the "MPEG-4 Audiobook File" file type, you need software like Apple iTunes or a similar tool.
About M4B files
The .m4b file is an MPEG-4 audio container specifically tailored for audiobooks and podcasts. Its main advantage is support for chapter markers and digital bookmarks, allowing listeners to pause and resume playback at specific points. The format is built on the AAC codec, popularized by Apple, and is natively managed using Apple iTunes or Apple Books. While excellent for the Apple ecosystem, the .m4b format has severe drawbacks for everyday users. It is highly restricted in compatibility outside of iOS or macOS devices. Standard car stereos, older MP3 players, and default Android music apps generally cannot read .m4b files. Furthermore, files purchased directly from Apple or Audible are frequently locked behind FairPlay DRM (Digital Rights Management), which prevents them from being opened in unauthorized software. Even when DRM-free, the chapter metadata is often lost or ignored by non-compliant media players. To overcome these playback limits, converting the file is the most pragmatic solution. For universal playback across Android, Windows, and legacy hardware players, convert to mp3. For modern devices where you simply want to listen without needing chapter navigation, converting to m4a is ideal. Just drag and drop your file here to analyze and convert it - free, online, and without installing software.
Use Convert.Guru to open and convert your M4B file.
If you want to convert M4B file to MP3, FLAC, WAV, AAC, OGG, WMA, M4A, AIFF, OPUS, ALAC, APE or WV, you can use Apple iTunes or similar software from the "Audiobook and Podcast Storage" category. In the File menu, look for Save As… or Export….
To convert MIDI, AAC, TTA, AU, WV, DTS, MID, FLAC, RA, MP3, PCM or WAV files to M4B, try Apple iTunes or another comparable tool in the "Audiobook and Podcast Storage" category.
The M4B Converter Story
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our M4B converter.