Having problems opening a M4B file?

We have programs that can open or convert your M4B files.

Opening M4B files

Did your computer fail to open a M4B file? We explain what M4B files are and recommend software that we know can open or convert your M4B files.

What is a M4B file?

Files that contain the .m4b file extension are used to store audio books that are downloaded from the Apple iTunes Store. M4B audio books are copy protected using the Apple "FairPlay" DRM technology.

The Apple FairPlay DRM technology prevents a user from playing the audio books on unauthorized computers and devices. A user may authorize up to five computers on a single iTunes account to play the audio book. If the user wants to play the audio book on more than five computers, he or she must create another account and purchase the book on the second account for use on an additional five computers.

The M4B file format is based on the MPEG-4 container file format. M4B files are usually compressed using AAC encoding. M4B files are similar to M4A files, but the M4B format allows for bookmarking of the files, making the M4B format more suitable for audio books and podcasts.

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About File Extension M4B

File.org aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.

If you have additional information about the M4B file format or software that uses files with the M4B suffix, please do get in touch - we would love hearing from you.