.MP3 File Extension

An MP3 file is an audio file saved in a compressed audio format developed by the Moving Picture Experts Group (MPEG) that uses "Layer 3" audio compression (MP3). It is most commonly used to store music, but may also contain other types of audio content, such as a lecture, sermon, audiobook, or podcast.

You can open an MP3 file with most audio players. In Windows, you can use Microsoft Windows Media Player, which is bundled with the operating system. In macOS, you can use Apple iTunes (or Apple Music), which is bundled with the operating system.

There are a variety of other free and commercial audio players that provide different playback features and conversion capabilities. Some of these audio players include VideoLAN VLC media player, Nullsoft Winamp, Eltima Elmedia Player, Audacity, olimsoft OPlayer, and Adobe Audition.