On some devices, particularly mobile, opening this file type can be problematic. On Windows, it opens in Windows Media Player.

There is no need for third-party software. Simply double-clicking the file opens it. MP4 files open in the operating system's default video player. Many consider MP4 to be one of the best video formats available today. It is also a popular video format for streaming over the Internet, such as on YouTube. It is compatible with a wide range of devices and operating systems, using a codec to compress file size, resulting in a file that is easy to manage and store. MPEG-4 (MP4) is a container video format that can store multimedia data, usually audio and video. Users can also preview M4A files by highlighting the file and pressing the spacebar.Īdditionally, M4A opens in VLC media player, Adobe Premiere Pro, Elmedia Player, Winamp, and a host of other programs.ĭeveloped by: ISO/ IEC, Moving Pictures Experts Group For Windows users, the default program is Windows Media Player. For Apple users, iTunes is the default program to open M4A files.

M4A files open in most well-known, audio-playback programs, including iTunes, QuickTime, and Windows Media Player. M4A files are smaller in size while simultaneously better in quality than MP3 files, with which it shares the most similarities, in comparison to all other audio file formats. MPEG 4 Audio (M4A) compresses and encodes audio files by using one of two coder-decoder algorithms: Advanced Audio Coding (AAC) or Apple Lossless Audio Codec (ALAC).

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