List of All the File Extensions Formats and Types Starting With the Letter M
- .M3U MP3 songs playlist
- .MA1 Diablo II Act 1 saved map progress
- .MA1.MMF SMAF Synthetic music mobile application format
- .MA2.MMF SMAF Synthetic music mobile application format
- .MACP Apple Macintosh MacPaint bitmap image
- .MACS Apple Mac OS system
- .MAF Microsoft Access form shortcut
- .MAILLOC Apple Mac OS X Finder mail internet location
- .MAILTOLOC Apple Mail mail address
- .MD
- Chaos Desktop metadata
- Machine description
- Markdown markup language
- Mayura Draw vector drawing
- MDCD compressed files archive
- Moneydance financial data
- Mungyodance data pack
- MuseData music notation
- Technics keyboard user MIDI settings
- Teknical eLearning objects meta-data
- .MKV Matroska video-audio multimedia
- .MP3
- Compressed audio and music file, mp3 songs or ringtones
- Masterpoint green points
- mp3HD audio
- mp3PRO
- SHARP MZ-series emulator
- .MP4 MPEG-4 video files format
- .MPP
- Microsoft Project plan files
- BX-24 Basic Express compiler map
- CAD drawing
- Musepack audio
- .MUI
- Amiga MUI default class/library
- MultiLanguage Windows resource
- Opengl Glut