The Extensible Music Format (XMF) is a family of music-related file formats created and administered by the MIDI Manufacturer's Association.

XMF is based on the idea of containing one or more files in existing formats such as Standard MIDI Files, DLS instrument files, WAV or other digital audio files, etc. to create a collection of all the resources needed to present a musical piece, an interactive webpage soundtrack, or any other piece of media using pre-produced sound elements.