.RMJ File Extension

Proprietary audio format used by Real Media Jukebox, also known as RealJukebox; saved in a slightly different format than .RA and .RAM files, which are used by RealPlayer.

RealJukebox was a jukebox-style music player created by RealNetworks. It has since been replaced by RealPlayer and is no longer developed. RMJ files may be played in RealPlayer or other compatible programs.