Files with a .m4a extension are container files that store audio data. The audio data that is contained in the .m4a files is encoded using the MPEG4 Part 14 format.
The .m4a file extension was created by Apple. It is very similar to the .mov and .mp4 file formats, except that .m4a files do not contain any video data.
Like MP3 files, files with the .m4a extension are compressed, but the compression technology used to create .m4a files results in a higher quality of sound. File compression makes the files more manageable, decreasing the file size. This allows them to be downloaded from the Internet more quickly and allows the M4A file to take up less storage space.
Try a universal file viewer
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 M4A file format or software that uses files with the M4A suffix, please do get in touch - we would love hearing from you.