of 17 
| Extension | File Type Developer | File Category | File Type Description | Software | Software Developer |
|---|---|---|---|---|---|
| .MRD | Interscape | Text Files | MathRevolt Infinity Document | Malete | Open Source |
| .MRF | Apple | Font Files | Macintosh Font File | WinMorph | Open Source |
| .MRI | Open Source | Data Files | Pittsburgh MRI File Format | PGH_MRI | Open Source |
| .MRX | Open Source | Data Files | Record Access File | Malete | Open Source |
| .MS1 | VirtualBus.info | Game Files | VirtualBus Map File | VirtualBus | Open Source |
| .MSC | Microsoft Corporation | Uncommon Files | Microsoft C Makefile | MuseScore | Open Source |
| .MSCR | Kaleida Ltd | Developer Files | ServiceMon Script | Rename Master | Open Source |
| .MSCZ | Open Source | Audio Files | MuseScore Compressed Score File | MuseScore | Open Source |
| .MSH1XML | Microsoft Corporation | Settings Files | Monad Display Configuration File | AbiWord | Open Source |
| .MSL | Microsoft Corporation | Developer Files | Mapping Specification Language File | gVim | Open Source |
| .MT2 | Yannick Delwiche | Audio Files | MadTracker 2 Module | Schism Tracker | Open Source |
| .MTL | TurboCAD | 3D Image Files | OBJ Material File | MeshLab | Open Source |
| .MTM | VideoLAN | Audio Files | MultiTracker Module | ModPlug Player | Open Source |
| .MTS | Sony | Video Files | AVCHD Video File | Eltima Elmedia Player | Open Source |
| .MUSICXML | Michael Good | Audio Files | Compressed MusicXML File | MuseScore | Open Source |
| .MUZ | HoverDesk.net | Audio Files | MUZ Audio File | Audacity | Open Source |
| .MW | Apple | Text Files | MacWrite Text Document | MediaWiki | Open Source |
| .MXL | Michael Good | Audio Files | Compressed MusicXML File | MuseScore | Open Source |
| .MXML | Adobe Systems Incorporated | Developer Files | Flex MXML Component | gVim | Open Source |
| .N64 | Unknown Developer | Game Files | Nintendo 64 Emulator ROM File | Project64 | Open Source |
| .NARC | Nintendo | Game Files | Nintendo DS Archive File | Tahaxan | Open Source |
| .NBM | Oracle Corporation | Plugin Files | NetBeans Module | NetBeans | Open Source |
| .NCF | Valve | Game Files | No Cache File | GCFScape | Open Source |
| .NCX | IDPF (International Digital Publishing Forum) | eBook Files | EPUB Navigation Control XML File | Calibre | Open Source |
| .NDB | Naviter | Data Files | SeeYou Waypoint File | ClamWin | Open Source |
| .NDS | Nintendo | Game Files | Nintendo DS Game ROM | DeSmuME | Open Source |
| .NDZ | Open Source | Disk Image Files | Emulab Frisbee Disk Image | Emulab | Open Source |
| .NES | Nintendo | Game Files | Nintendo (NES) ROM File | FCEUX | Open Source |
| .NFG | Open Source | Settings Files | NewsBin Configuration File | DJI Interprises NewsBin Pro | Open Source |
| .NFO | Microsoft Corporation | System Files | System Information File | AbiWord | Open Source |
| .NGS | 5pb. and Nitroplus | Game Files | Steins;Gate Game File | Embroidermodder 2 | Open Source |
| .NITF | U.S. Department of Defense | Data Files | National Imagery Transmission Format File | GDAL | Open Source |
| .NL | Kdan Mobile Software Ltd | Data Files | Note Ledge File | Natron | Open Source |
| .NLM | Nokia | Raster Image Files | Nokia Logo File | IrfanView | Open Source |
| .NLS | Uri Wilensky | Developer Files | NetLogo Source Code File | Notepad2 | Open Source |
| .NMA | National Marine Electronics Association (NMEA) | Data Files | NMEA Data File | GPSBabel | Open Source |
| .NMV | Open Source | Data Files | Nintendulator Movie Capture File | Nintendulator | Open Source |
| .NNA | NeuralWare | Developer Files | NeuralWare Data | PSPad | Open Source |
| .NOW | The Document Foundation | Text Files | Readme Text Document File | Pico | Open Source |
| .NPL | Nokia | Data Files | Nokia Playlist File | The Core Media Player | Open Source |
| .NPS | Open Source | Settings Files | Natron Node Presets File | Natron | Open Source |
| .NRG | Nero AG | Disk Image Files | Nero CD/DVD Image File | Nrg2Iso | Open Source |
| .NS1 | Open Source | Game Files | Nestopia Save State | Nestopia | Open Source |
| .NSF | Unknown Developer | Audio Files | NES Sound Format File | DeliPlayer | Open Source |
| .NSL | Nullsoft | Developer Files | NsL Script | nsL Assembler for NSIS | Open Source |
| .NTF | Open Source | Font Files | Windows Font File | FontForge | Open Source |
| .NTP | Open Source | Video Files | Natron Project File | Natron | Open Source |
| .NTR | Open Source | Data Files | Netrun Executable List | NetRun | Open Source |
| .NUV | Shedworx | Video Files | NuppelVideo File | MythTV | Open Source |
| .NV | Q.W.Page Associates Inc | Database Files | NewViews Database File | MAME | Open Source |
| .NVM | Open Source | Data Files | PlayStation 2 BIOS Configuration File | PCSX2 | Open Source |
| .NW | GitHub, Inc. | Developer Files | Node-Webkit App Package | NWChem | Open Source |
| .NY | SourceForge | Plugin Files | Audacity Nyquist Plug-in | Audacity | Open Source |
| .NZB | Various Developers | Web Files | NewzBin Usenet Index File | DJI Interprises NewsBin Pro | Open Source |
| .O1 | Open Source | Data Files | Object File For GO321v1 Platform | Free Pascal | Open Source |
| .OBJ | Wavefront Technologies | 3D Image Files | Wavefront 3D Object File | MeshLab | Open Source |
| .OBML | Opera Software | Web Files | Opera Mini Saved Web Page | MicroEmulator | Open Source |
| .OBML16 | Opera Software | Web Files | Opera Mini Saved Web Page | MicroEmulator | Open Source |
| .OBS | Department of Wind Energy at the Technical University of Denmark, Denmark | Data Files | WAsP Obstacle List Data | Open Broadcaster Software | Open Source |
| .OBT | Open Source | Settings Files | Openbox Theme File | Openbox | Open Source |
| .OCSP | Open Source | Data Files | HAProxy OCSP Data File | HAProxy | Open Source |
| .OCT | Radiance Community | 3D Image Files | Radiance Octree File | RADIANCE | Open Source |
| .ODD | Coby Electronics Corporation | Audio Files | Coby Voice Recorder Data | TEI Tools | Open Source |
| .ODF | Oracle Corporation | Uncommon Files | OpenDocument Formula | AbiWord | Open Source |
| .ODM | Open Source | Text Files | OpenDocument Master Document | AbiWord | Open Source |
| .ODR | Open Source | Data Files | OpenIV Model Data | OpenIV | Open Source |
| .ODT | Oracle Corporation | Text Files | OpenDocument Text Document | AbiWord | Open Source |
| .OEB | IDPF (International Digital Publishing Forum) | eBook Files | Open eBook File | Calibre | Open Source |
| .OEM | Microsoft Corporation | Settings Files | Original Equipment Manufacturer Setup File | OEM Information Editor | Open Source |
| .OFF | Open Source | 3D Image Files | Object File Format | MeshLab | Open Source |
| .OFX | Intuit, Inc. | Data Files | Open Financial Exchange File | GnuCash | Open Source |
| .OGA | Xiph.Org | Audio Files | Ogg Vorbis Audio File | IrfanView | Open Source |
| .OGG | Xiph.Org | Audio Files | Ogg Vorbis Audio File | IrfanView | Open Source |
| .OGX | Xiph.Org | Video Files | Ogg Vorbis Multiplexed Media File | XMMS | Open Source |
| .OIV | Open Source | Plugin Files | OpenIV Mod Package File | OpenIV | Open Source |
| .OKT | Open Source | Audio Files | Oktalyzer Module | ModPlug Player | Open Source |
| .OMO | Open Source | Developer Files | OMake Object File | OMake | Open Source |
| .OO | Open Source | Uncommon Files | Free Pascal Object File For OS/2 Version | Free Pascal | Open Source |
| .OOA | Sublime HQ Pty Ltd | Data Files | OOA Interchange Format Data | PSPad | Open Source |
| .OP | Open Source | Data Files | OpenPAT Report | OpenPAT | Open Source |
| .OPML | The Omni Group | Web Files | Outline Processor Markup Language File | OPML Editor | Open Source |
| .OPT | LexisNexis | Database Files | Concordance Database File | AGiliTy | Open Source |
| .OPUS | Open Source | Audio Files | Opus Audio File | MediaInfo Player | Open Source |
| .OS | Open Source | Developer Files | ObjectScript Source File | ObjectDevel | Open Source |
| .OSC | OpenStreetMap | GIS Files | OpenStreetMap Change File | osmchange | Open Source |
| .OSZ | Ppy Pty Ltd | Game Files | Osu! Beatmap File | opsu! | Open Source |
| .OTD | Open Source | Game Files | OpenIV Texture Data | OpenIV | Open Source |
| .OTF | Open Source | Font Files | OpenType Font | FontForge | Open Source |
| .OTRKEY | OnlineTvRecorder.com (OTR) | Video Files | OnlineTvRecorder Encoded Video File | otrtool | Open Source |
| .OUT | Open Source | Executable Files | Compiled Executable File | Linux | Open Source |
| .OW | Open Source | Developer Files | Free Pascal 1.0.x Object File | Free Pascal | Open Source |
| .OX | Open Source | Developer Files | Ox Source Code | OX Professional | Open Source |
| .OXO | Open Source | Settings Files | Ox Object-oriented Matrix Programming Language Source Code | OX Professional | Open Source |
| .P | Python Software Foundation | Developer Files | Python Pickle File | Free Pascal | Open Source |
| .P00 | HERE | Uncommon Files | HERE Maps For Android Map Data Package | QuickPar | Open Source |
| .P01 | HERE | Uncommon Files | HERE Maps For Android Map Data Package | QuickPar | Open Source |
| .P02 | Peter B. Clements | Backup Files | PAR Recovery Volume | QuickPar | Open Source |
| .P03 | Peter B. Clements | Backup Files | PAR Recovery Volume | QuickPar | Open Source |
| .P04 | Peter B. Clements | Backup Files | PAR Recovery Volume | QuickPar | Open Source |
| .P06 | Bentley Systems | Data Files | MicroStation Modification Project Resource File | QuickPar | Open Source |
Optional Offer for FileViewPro by Solvusoft | EULA | Privacy Policy | Terms | Uninstall
“FileViewPro eliminates the time and frustration of trying to track down a specific piece of software to open a specific file.” - Tucows
*Files that are not supported can be opened in binary format.
Copyright © 2010-2024 FileViewPro