High Quality Content by WIKIPEDIA articles! MP3.com is a web site operated by CNET Networks providing information about digital music and artists, songs, services, community, and technologies. It is probably better known for its original incarnation, as a legal, free music sharing service, popular with independent musicians for promoting their work. It was named after the popular music file format, MP3. It was shut down on December 2, 2003 by CNET, which, after purchasing the domain name (but not MP3.com's technology or music assets), established the current MP3.com site.