| .M01 | Digital Vision | Grafiske Filer | ComputerEyes Animation File | ComputerEyes | Digital Vision |
| .MAE | Interscape | Grafiske Filer | My Avatar Editor Character File | My Avatar Editor | Interscape |
| .MBT | Interscape | Grafiske Filer | Blue Card Manager Merit Badge Template File | Blue Card Manager | Scout Management Software |
| .MC6 | Smith Micro Software | Grafiske Filer | Poser 6 Material File | Poser | Smith Micro Software |
| .MCH | Interscape | Grafiske Filer | Machinery HDR Effects | Machinery HDR | Interscape |
| .MGL | Microsoft Corporation | Grafiske Filer | Age Of Empires 2 Replay File | Microsoft Age of Empires | Ensemble Studios |
| .MGX | Microsoft Corporation | Grafiske Filer | Rise Of Nations Saved Game | Rise Of Nations | Big Huge Games |
| .MH | Unknown Developer | Grafiske Filer | Teli Fax Image | XnView MP | XnSoft |
| .MHA | Open Source | Grafiske Filer | MetaImage Medical Format | Insight Segmentation and Registration Toolkit | Open Source |
| .MIF | Adobe Systems Incorporated | Grafiske Filer | FrameMaker Interchange Format File | Adobe FrameMaker | Adobe Systems Incorporated |
| .MLD | FMJ-Software | Grafiske Filer | I-Melody Format For I-Mode | Awave Studio | FMJ-Software |
| .MLF | Autodesk, Inc. | Grafiske Filer | Autodesk Mapguide Layer Data | MapGuide Open Source | Autodesk, Inc. |
| .MNG | Various Developers | Grafiske Filer | Multiple Network Graphic | Mozilla Firefox | Mozilla |
| .MO | Dassault Systèmes | Grafiske Filer | Dymola Simulation File | Dymola | Dassault Systèmes |
| .MOCHA | Adobe Systems Incorporated | Grafiske Filer | Adobe Mocha For Adobe After Effects File | Adobe After Effects | Adobe Systems Incorporated |
| .MOR | Corel | Grafiske Filer | Corel Shared Writing Tools Data | Corel Paradox | Corel |
| .MSK | Corel | Grafiske Filer | Paint Shop Pro Mask File | PaintShop Pro | Corel |
| .MSV | Sony | Grafiske Filer | Memory Stick Voice File | Microsoft Windows Media Player | Microsoft Corporation |
| .MVO | Unknown Developer | Grafiske Filer | A Graphic File | Unknown Software | Unknown Developer |
| .NCB | Microsoft Corporation | Grafiske Filer | Visual C++ IntelliSense Database | Microsoft Visual Studio | Microsoft Corporation |
| .NCE | Miroslav Rajčić | Grafiske Filer | NoteCase Pro Encrypted Document | NoteCase Pro | Miroslav Rajčić |
| .NCI | CNC Software | Grafiske Filer | Mastercam Toolpath Data | Mastercam | CNC Software |
| .NCV | Nikon | Grafiske Filer | Nikon Capture Curves File | Nikon Capture NX | Nikon |
| .NDB | Naviter | Grafiske Filer | SeeYou Waypoint File | SeeYou | Naviter |
| .NDG | Broderbund | Grafiske Filer | Nick-O-Matic Design Factory Project File | Nick-O-Matic Design Factory | Broderbund |
| .NEN | Broderbund | Grafiske Filer | Nick-O-Matic Design Factory Project File | Nick-O-Matic Design Factory | Broderbund |
| .NGO | Broderbund | Grafiske Filer | Nick-O-Matic Design Factory Project File | Nick-O-Matic Design Factory | Broderbund |
| .NIL | Symantec Corporation | Grafiske Filer | Norton Icon Library Icon Set | Norton Utilities | Symantec Corporation |
| .NPM | Corel | Grafiske Filer | CorelDRAW V10 Draw Media Lines Data | CorelDRAW Graphics Suite | Corel |
| .NSO | NetStudio | Grafiske Filer | NetStudio Easy Web Graphics Data | NetStudio Easy Web Graphics | NetStudio |
| .O2C | Eleco Software GmbH | Grafiske Filer | Objects To See 3D File Format | Objects to See | Eleco Software GmbH |
| .O3D | Google | Grafiske Filer | Google Open 3D Web Graphic Format | Google Chrome | Google |
| .OCC | MathWorks | Grafiske Filer | Oceanic DataPool File | The MathWorks MATLAB | MathWorks |
| .ONX | Onyx Computing | Grafiske Filer | OnyxGrass Image | OnyxGrass | Onyx Computing |
| .OOG | Python Software Foundation | Grafiske Filer | PyGraph Python Graphics Interface Object Oriented Graphics | Python | Python Software Foundation |
| .OSP | Jonathan Thomas | Grafiske Filer | OpenShot Project File | OpenShot | Jonathan Thomas |
| .OTO | Open Source | Grafiske Filer | AutoPano Project | AutoPano | Kolor |
| .OVF | VMware | Grafiske Filer | Open Virtualization File | VMware Workstation | VMware |
| .PAN | ProVUE Development | Grafiske Filer | Panorama Database File | ProVUE Development Panorama | ProVUE Development |
| .PANO | Microsoft Corporation | Grafiske Filer | Camera Panoramic Picture | Microsoft OneDrive | Microsoft Corporation |
| .PC3 | Autodesk, Inc. | Grafiske Filer | AutoCAD Plotter Configuration File | Autodesk AutoCAD | Autodesk, Inc. |
| .PCJ | IBM | Grafiske Filer | IBM LinkWay Graphics Data | IBM LinkWay | IBM |
| .PCS | Pfaff | Grafiske Filer | Pfaff Embroidery File | PesView | Open Source |
| .PDA | Molecular Devices | Grafiske Filer | SoftMax Pro Microplate Data Analysis File | SoftMax Pro | Molecular Devices |
| .PDV | Kitware, Inc. | Grafiske Filer | Visualization Toolkit Graphic File | Visualization ToolKit | Interscape |
| .PFL | PlotSoft | Grafiske Filer | PDFill Project File | PlotSoft PDFill | PlotSoft |
| .PFR | Corel Corporation | Grafiske Filer | Corel PaintShop Photo Pro Frame Data | PaintShop Pro | Corel |
| .PFS | Antonio Da Cruz | Grafiske Filer | PhotoFiltre Studio Saved Selection File | PhotoFiltre | Antonio Da Cruz |
| .PGL | Hewlett-Packard | Grafiske Filer | HP Plotter Language File Format | Unknown Software | Unknown Developer |
| .PHC | David Harris | Grafiske Filer | Pegasus Mail Header Cache | Pegasus Mail | David Harris |
| .PHP | Panic | Grafiske Filer | PHP Source Code File | Microsoft Notepad | Microsoft Corporation |
| .PI | 10101 Software | Grafiske Filer | Pi Calculation Data File | iPi Software | 10101 Software |
| .PICS | Apple | Grafiske Filer | Apple Mac PICT Drawing Sequence File | QuickDraw | Apple |
| .PII | Apple | Grafiske Filer | Golden Orchard Apple II CD Rom File | Apple OS X | Apple |
| .PIV | Peter Bone | Grafiske Filer | Pivot Stickfigure Animation | Pivot Animator (Pivot Stickfigure Animator) | Peter Bone |
| .PL1 | Broderbund | Grafiske Filer | 3D Home Architect Room Plan | 3D Home Architect | Broderbund |
| .PLB | Microsoft Corporation | Grafiske Filer | Microsoft Robotics Developer Studio Playback Data | Microsoft Robotics Developer Studio | Microsoft Corporation |
| .PLZ | IBM | Grafiske Filer | Lotus Freelance Presentation | Lotus Freelance Graphics | IBM |
| .PMB | Polar | Grafiske Filer | Polar Uplink Tool Bitmap File | PeaZip | Open Source |
| .PMP | Autodesk, Inc. | Grafiske Filer | AutoCAD Plot Model Parameter File | Autodesk AutoCAD | Autodesk, Inc. |
| .PNG | The Pixelmator Team | Grafiske Filer | Portable Network Graphics | Adobe Illustrator CC | Adobe Systems Incorporated |
| .POS | Trimble Inc. | Grafiske Filer | Trimble Position File | GPS Pathfinder Office Software | Trimble Inc. |
| .PPI | Microsoft Corporation | Grafiske Filer | Microsoft PowerPoint Graphics Data | Microsoft PowerPoint | Microsoft Corporation |
| .PPR | IBM | Grafiske Filer | Cognos PowerPlay Report File | Cognos PowerPlay | IBM |
| .PSEG | IBM | Grafiske Filer | IBM Printer Page Segment Bitmap | XnView MP | XnSoft |
| .PSI | SAPIEN Technologies | Grafiske Filer | PrimalScript Online Help Shortcut | PrimalScript | SAPIEN Technologies |
| .PTN | Nuance | Grafiske Filer | PaperPort Thumbnail File | Nuance PaperPort 14 | Nuance |
| .PTS | Avid Technology | Grafiske Filer | Pro Tools Session | Avid Pro Tools | Avid Technology |
| .PTV | CodeJam Pte Ltd | Grafiske Filer | MemoriesOnTV Project | MemoriesOnTV | CodeJam Pte Ltd |
| .PVT | Tom Jennings | Grafiske Filer | Local Fidonet Pointlist | Fidonet | Tom Jennings |
| .PVW | Outram Research Ltd | Grafiske Filer | Pronto For Windows Data View File | Pronto for Windows | Outram Research Ltd |
| .PWC | LANovation | Grafiske Filer | PictureTaker File | LANovation PictureTaker | LANovation |
| .PXB | The Pixelmator Team | Grafiske Filer | Pixelmator Brush File | Pixelmator | The Pixelmator Team |
| .PZI | Unknown Developer | Grafiske Filer | Pizazz Plus Graphics File | Unknown Software | Unknown Developer |
| .PZM | GraphPad Software | Grafiske Filer | GraphPad Prism Project | GraphPad Prism | GraphPad Software |
| .Q3D | Act-3D | Grafiske Filer | Quest3D Project File | Quest3D | Act-3D |
| .QAD | Corel | Grafiske Filer | Corel WordPerfect Office Thumbnail | Corel WordPerfect | Corel |
| .QLI | Gammill, Inc. | Grafiske Filer | Statler Stitcher Data | Statler Stitcher | Gammill, Inc. |
| .QMG | Samsung Electronics | Grafiske Filer | Samsung Theme Graphics File | Samsung Theme Designer | Samsung Electronics |
| .QST | Synergy Software | Grafiske Filer | KaleidaGraph Style File | KaleidaGraph | Synergy Software |
| .QTZ | Apple | Grafiske Filer | Quartz Composer File | Apple QuickTime Player | Apple |
| .QXP | QuArK Development Team | Grafiske Filer | QuarkXpress Project | QuarkXPress | Quark Software Inc. |
| .R82 | Microsoft Corporation | Grafiske Filer | Flight Simulator Texture File | Microsoft Flight Simulator | Microsoft Corporation |
| .RAG | Bentley Systems | Grafiske Filer | RAM Advanse Generator Data | RAM Advanse | Bentley Systems |
| .RD3 | Corel | Grafiske Filer | CorelDRAW CorelDream 3D Data | CorelDRAW Graphics Suite | Corel |
| .RGH | Unknown Developer | Grafiske Filer | ZZ RouGH Image | Unknown Software | Unknown Developer |
| .RKW | RockWare | Grafiske Filer | RockWorks Graphics File | RockWorks | RockWare |
| .RL8 | Microsoft Corporation | Grafiske Filer | Windows Bitmap Image | Adobe Photoshop | Adobe Systems Incorporated |
| .RLB | Pierre-Emmanuel Gougelet | Grafiske Filer | Alias/Wavefront Bitmap Image File | XnView MP | XnSoft |
| .RLC | ESRI | Grafiske Filer | ArcView Image | ArcView | ESRI |
| .RND | Symantec Corporation | Grafiske Filer | PGP Random Seed File | Pretty Good Privacy (PGP) | Symantec Corporation |
| .ROS | Jon Taylor | Grafiske Filer | BattleScribe Roster Editor File | BattleScribe | Jon Taylor |
| .RTB | William Blake | Grafiske Filer | Behemot Binary 3D Scene | Behemoth | William Blake |
| .RVS | Eidos Interactive | Grafiske Filer | Revenant Game Archive | Revenant | Cinematix Studios, Inc. |
| .S3D | Micrografx | Grafiske Filer | Micrografx Simply 3D Project File | Micrografx Simply 3D | Micrografx |
| .SAF | DeLorme | Grafiske Filer | Street Atlas USA Map File | DeLorme Street Atlas USA | DeLorme |
| .SAIF | Safe Software | Grafiske Filer | Spatial Archive Interchange Format | Unknown Software | Unknown Developer |
| .SAN | LucasArts Entertainment Company, LLC | Grafiske Filer | Smush Animation File | Star Wars: Rebel Assault | LucasArts Entertainment Company, LLC |
| .SBL | Adobe Systems Incorporated | Grafiske Filer | Shockwave Flash Object | Adobe Flash Player | Adobe Systems Incorporated |
| .SDP | Oracle Corporation | Grafiske Filer | StarOffice Presentation File | Apache OpenOffice | Apache Software Foundation |
af 4 
