| .M15 | Moving Picture Experts Group | Videofiler | MPEG Video File | Adobe Flash Player | Adobe Systems Incorporated |
| .M1V | Roxio | Videofiler | MPEG-1 Video File | Adobe Flash Professional CC | Adobe Systems Incorporated |
| .M2T | Roxio | Videofiler | HDV Video File | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .M2TS | Sony | Videofiler | Blu-ray BDAV Video File | Adobe Flash Player | Adobe Systems Incorporated |
| .M75 | Moving Picture Experts Group | Videofiler | MPEG Video File | Adobe Flash Player | Adobe Systems Incorporated |
| .MASK | Adobe Systems Incorporated | Inställningsfiler | SpeedGrade Color Mask File | Adobe SpeedGrade | Adobe Systems Incorporated |
| .MAX | Autodesk, Inc. | 3D bildfiler | 3ds Max Scene File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .MD0 | Alcohol Soft | Diskimage filer | Alcohol Disk Image Segment 1 | Adobe Photoshop CC | Adobe Systems Incorporated |
| .MEF | Microsoft Corporation | Kamera raw-filer | Mamiya RAW Image | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .MF2 | Adobe Systems Incorporated | Videofiler | Authorware Mediator5 Multimedia File | Adobe Authorware | Adobe Systems Incorporated |
| .MFD | Yamaha Corporation | Databasfiler | Music Finder Database | Adobe Creative Suite | Adobe Systems Incorporated |
| .MFW | MamiyaLeaf | Kamera raw-filer | Mamiya Camera Raw File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .MGP | Adobe Systems Incorporated | Datafiler | Adobe Captivate MenuBuilder Data | Adobe Captivate | Adobe Systems Incorporated |
| .MHTM | Microsoft Corporation | Webbfiler | Mime HTML (MHTML) File | Adobe Dreamweaver | Adobe Systems Incorporated |
| .MHTML | Microsoft Corporation | Webbfiler | Mime HTML (MHTML) File | Adobe Dreamweaver | Adobe Systems Incorporated |
| .MIF | Adobe Systems Incorporated | Sidlayoutfiler | FrameMaker Interchange Format File | Adobe FrameMaker | Adobe Systems Incorporated |
| .MJ2 | Open Source | Videofiler | Motion JPEG 2000 Video | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .MJD | Adobe Systems Incorporated | Kodade filer | Adobe Acrobat MIME Encoded Job Definition File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .MJP2 | Open Source | Videofiler | Motion JPEG 2000 Video | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .MML | Adobe Systems Incorporated | Sidlayoutfiler | FrameMaker Maker Markup Language File | Adobe FrameMaker | Adobe Systems Incorporated |
| .MNO | Adobe Systems Incorporated | Datafiler | Macromedia Design Note | Adobe Dreamweaver | Adobe Systems Incorporated |
| .MNU | Autodesk, Inc. | Inställningsfiler | AutoCAD Interface Layout File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .MOCHA | Adobe Systems Incorporated | Grafikfil | Adobe Mocha For Adobe After Effects File | Adobe After Effects | Adobe Systems Incorporated |
| .MOOV | Apple | Videofiler | Apple QuickTime Movie | Adobe Flash Player | Adobe Systems Incorporated |
| .MOS | MamiyaLeaf | Kamera raw-filer | Leaf Camera RAW File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .MOV | Apple | Videofiler | Apple QuickTime Movie | Adobe Flash Player | Adobe Systems Incorporated |
| .MP2 | New World Computing | Spelfiler | Heroes Of Might And Magic II Map File | Adobe Audition | Adobe Systems Incorporated |
| .MP3 | Moving Picture Experts Group | Ljudfiler | MP3 Audio File | Adobe Audition | Adobe Systems Incorporated |
| .MPG | Moving Picture Experts Group | Videofiler | MPEG Video File | Adobe Flash Player | Adobe Systems Incorporated |
| .MPJ | Minitab Inc | Datafiler | Minitab Project File | Adobe RoboHelp | Adobe Systems Incorporated |
| .MPO | CyberLink | Rasterbildfiler | CIPA Multi Picture Object File | Adobe Photoshop | Adobe Systems Incorporated |
| .MRW | Konica Minolta | Kamera raw-filer | Minolta Raw Image File | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .MSH | Martin Schweiger | 3D bildfiler | Orbiter 3D Mesh File | Visual Communicator | Adobe Systems Incorporated |
| .MTL | TurboCAD | 3D bildfiler | OBJ Material File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .MUSE | Adobe Systems Incorporated | Webbfiler | Adobe Muse Website Project | Adobe Muse CC | Adobe Systems Incorporated |
| .MXF | SMPTE | Videofiler | Material Exchange Format File | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .MXI | Adobe Systems Incorporated | Datafiler | Adobe Extension Information File | Adobe InCopy | Adobe Systems Incorporated |
| .MXML | Adobe Systems Incorporated | Utvecklarfiler | Flex MXML Component | Adobe Flash Builder | Adobe Systems Incorporated |
| .MXP | Adobe Systems Incorporated | Pluginfiler | Adobe Extension Package | Adobe Extension Manager CC | Adobe Systems Incorporated |
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