M
| Ext. | Description | Used by | |
|---|---|---|---|
| M | Mathematica Package File | Mathematica | |
| M | MATLAB M-File | MATLAB | |
| M2 | WoW Model Object file | Blizzard Entertainment games (World of Warcraft/Warcraft series) | |
| M2TS | MPEG 2 Transport Stream | Various media playback devices / software | |
| M3U | M3U playlist file | Winamp, XMMS | |
| M3U8 | Unicode version of M3U playlist file (UTF-8) | Winamp, XMMS | |
| M4A | Advanced Audio Coding | ||
| M4r | iPhone ringtone | iTunes and iOS devices | |
| M7P | Multilizer 2007 and 2009 localization project file | Multilizer | |
| M8M | 8MAM8 Model File | ||
| MAFF | Mozilla Archive Format | Mozilla Firefox (with add-on) | |
| MAI | VAX | ||
| MAK | Makefile | ||
| MAK | Project file | VB – VC ++ | |
| MAN | User guide (manual) | ||
| MANAGER | Accounting data file | Manager – free accounting software | |
| MAP | Color palette file | ||
| MAP | Format data | Micrografx Picture Publisher | |
| MAP | Linker map file | ||
| MAP | Map file (usually created by compilers) | ||
| MAP | Map | Atlas MapMaker | |
| MAP | Network map | AccView | |
| MAP | Game map for Duke Nukem 3D | ||
| MAR | Assembly program | VAX Macro | |
| MAR | Microsoft ARchive | MSN Explorer (possibly other Microsoft products too) | |
| MAR | Mozilla ARchive | Mozilla Updater (used to house binary updates to products) | |
| MAS | SmartMaster set | Freelance Graphics | |
| MAT | Data | MATLAB | |
| MAT | Microsoft Access Table | Microsoft Access | |
| MAX | MAX source code file | ||
| MB | Memo field values for database | Paradox | |
| MBK | Multiple index file backup | dBASE IV | |
| MBP | Metadata | .mobi (Mobipocket) | |
| MBR | Master Boot Record File | GRUB | |
| MBX | Mailbox data | Eudora/ZERBERUS | |
| MCA | Minecraft "Anvil" world format | Minecraft 1.2 and onward | |
| MCC | Configuration file | Mathcad | |
| MCD | MathCad file | MathCad | |
| MCF | Font file | Mathcad | |
| MCF | Photo book or photo calendar layout file | FotoInsight Designer | |
| MCF | Multimedia Container Format (predecessor of Matroska) | ||
| MCI | MCI command script | Media Control Interface | |
| MCL | Multi Edit macro library | Multi Edit | |
| MCL | Cartesian manipulator for laser systems | ||
| MCP | Application script | Capsule | |
| MCP | Printer driver | Mathcad | |
| MCR | Minecraft saved world "region" file | Minecraft (up to 1.1) | |
| MCW | Text file | MacWrite II | |
| MDL | GoldSrc Model File (Quake-Based Engine) | Valve Corporation | |
| MDL | Source Engine Model File | Valve Corporation | |
| MDL | Quake 1 Model File | id Software | |
| MD2 | Quake 2 Model File | id Software | |
| MD3 | Quake 3 Model File | id Software | |
| MD5 | Doom 3 and Quake 4 Model File | id Software | |
| MD | Archive | mdcd10.arc | |
| MDA | Data | Microsoft Access | |
| MDA | Microsoft Access system database | Microsoft Access | |
| MDB | Microsoft DataBase | Microsoft Access | |
| MDF | Several uses | ||
| MDL | Model | 3D Design Plus or Simulink | |
| MDL | Spreadsheet | CA-Compete! | |
| MDM | Modem definition file | TELIX | |
| MDMP | Mini dumpfile | ||
| MDR | Microdrive file | ZX Spectrum emulator by g.a.lunter | |
| MDS | Midi Session | Sound Imp. | |
| MDT | Data table | Microsoft ILink incremental linker | |
| MDX | Multiple index file | dBASE IV | |
| MDZ | Text description of music module | Cubic Player – Cross-View | |
| ME | MultiEdit configuration | MultiEdit | |
| ME | Text file READ.ME | ||
| MEB | Macro Editor bottom overflow file | WordPerfect Library | |
| MEC | MECCA source | Maximus | |
| MED | Macro Editor delete save | WordPerfect Library | |
| MED | Music format | MED/OctaMED | |
| MEM | Macro Editor macro | WordPerfect Library | |
| MEM | Memory variable save file | dBASE IV – FoxPro – Clipper | |
| MEM | Memos datafile | Clarion | |
| MEM | Mnemosyne database | Mnemosyne; other spaced repetition software | |
| MEQ | Macro Editor print queue file | WordPerfect Library | |
| MER | Macro Editor resident area (vakioalue) | WordPerfect Library | |
| MES | Macro Editor work space file | WordPerfect Library | |
| MES | Message | ||
| MET | Document | Omnipage Pro | |
| MET | Macro Editor top overflow file | WordPerfect Library | |
| MET | OS/2 graphics metafile | PICVIEW.EXE | |
| MEU | Menu group | DOS Shell | |
| MEX | Macro Editor expound file | WordPerfect Library | |
| MEX | MEX file (executable command) | Matlab | |
| MF | Metafont file | TeX | |
| MFA | Source code file | Multimedia Fusion 2 / The Games Factory 2 | |
| MFF | MIDI | Cakewalk, MTPro 4 | |
| MFM | Music format | DMP | |
| MGF | Font | Micrografx | |
| MGF | Materials and Geometry Format | ||
| MGX | Designer 4.1 Drawing | Designer 4.1 | |
| MHT | Web Archive Single File | ||
| MIB | Snmp MIB file | ||
| MID | Standard MIDI file | music synthetizers, Winamp | |
| MIDI | See MID | ||
| MIFF | Magick Image File Format | ||
| MII | Datafile | MicroStat-II | |
| MIME | Message in MIME format (RFC822) | ||
| miniUSF | Nintendo proprietary MIDI file format for the Reality Signal Processor (Nintendo 64) | Nintendo 64 games | |
| MIO | MyInfo topic | Milenix MyInfo | |
| MIS | Mission, used by many games | ||
| MIX | Object file | Power C | |
| MK | Makefile | ||
| MKE | Makefile | Microsoft Windows SDK | |
| MKG | Makefile | ||
| MKI | Graphics format (Japan MKI) | ||
| MKI | Japanese graphics MAKIchan format | MagView 0.5 | |
| MKS | Data | TACT | |
| MKV | Matroska Multimedia Container | Media Player Classic, Windows Media Player, Matroska Splitter | |
| ML3 | Project | Milestones 3.x | |
| MLB | Macro library file | RT-11, Symphony | |
| MLI | 3DS Materials Libraries | 3D Studio | |
| MLRAW | Data | Moonlight Creator RAW format 3D object | |
| MLV | LabVIEW MathScript | ||
| MM | Text file | MultiMate Advantage II, FreeMind mind map file (XML) | |
| MMF | Mail message file | Microsoft Mail | |
| MMM | Multimedia movie file, RIFF RMMP format | MacroMind Director 3.x | |
| MMO | Memo writer file | RapidFile | |
| MMP | Output video format from Bravado board | ||
| MN | MuPAD Pro Notebook | Workspace file of MuPAD (integrated in Matlab) | |
| MND | Menu source | AutoCAD Menu Compiler | |
| MNG | Map | DeLorme Map'n'Go | |
| MNT | Additional (FPT) menu description file | FoxPro | |
| MNT | Menu memo | FoxPro | |
| MNU | Advanced macro file | HP NewWave | |
| MNU | Menu | AutoCAD Menu Compiler – Norton Commander – Signature | |
| MNU | Microsoft Mouse menu (for DOS apps) | ||
| MNX | Compiled menu file | AutoCAD | |
| MNX | Main (DBF) menu description file | FoxPro | |
| MNY | Account book | Microsoft Money | |
| MO? | Packed mail | FTN software | |
| MOB | Device definition file | PEN Windows | |
| MOBI | eBook | Mobipocket | |
| MOD | Modula language source | ||
| MOD | MODULA-2 source code file | Claridiv id="MDZ"> MDZon Modula-2 | |
| MOD | Module—used by Windows for DLL which implement DOS support | Win | |
| MOD | Music format (Amiga module) | DMP – ST – MDP – VP | |
| MOL | MOD4WIN PlayList | Mod4Win | |
| MOL | MDL Molfile | RasMol | |
| MOL2 | Tripos’ Sybyl MOL2 Format | SYBYL, RasMol | |
| MON | SYSGEN monitor build procedure | RT-11 | |
| MON | Monitor description | ReadMail | |
| MOP | MOPAC input file | MOPAC, RasMol | |
| MOV | Animation format (Mac) | QuickTime | |
| MOV | Movie file | AutoCAD AutoFlix | |
| MP2 | Mpeg audio file | Winamp, xing | |
| MP3 | MPEG audio stream, layer 3 | AWAVE, CoolEdit(+PlugIn), Winamp, many others | |
| MP4 | multimedia container format, MPEG 4 Part 14 | Winamp | |
| MPA | MPEG audio stream, layer 1,2,3 | AWAVE | |
| MPC | Calendar file | Microsoft Project | |
| MPC | Musepack audio | ||
| MPEG | multimedia containter format, video, audio | MPEG Player, Winamp | |
| MPG | see MPEG | ||
| MPKG | Multipackage installer script | Mac OS X | |
| MPL | MediaRack Midi Playlist | MediaRack | |
| MPM | MathPlan macro | WordPerfect Library | |
| MPP | Project file | Microsoft Project | |
| MPPZ | MagicPlot project file | MagicPlot | |
| MPQ | Mo'PaQ Archive | Blizzard games | |
| MPR | Generated executable menu file | FoxPro | |
| MPR | Multilizer 5.x and 6.x localization project file | Multilizer | |
| MPR | Command & Conquer: Red Alert 2 map file | Red Alert 2 | |
| MPT | Bitmap graphics (Multipage TIFF) | ||
| MPV | View file | Microsoft Project | |
| MPX | Compiled executable menu file | FoxPro | |
| MPX | Video format | ||
| MPZ | Miradi Project Zipfile | Miradi | |
| MRB | Multiple Resolution Bitmap graphics file | Microsoft C/C++ | |
| MRC | mIRC file | mIRC | |
| MRK | Windows User Benchmark | Win95 | |
| MRS | Macro Resource file | WordPerfect for Win | |
| MS | Microsoft antivirus report | MSAV | |
| MSC | Microsoft C makefile | ||
| MSC | management saved console | Microsoft; Microsoft MMC | |
| MSD | Secure and Encrypted File | mysecuredelivery/Download | |
| MSDL | Manchester Scene Description Language | ||
| MSDVD | Windows DVD Maker Project | Windows DVD Maker | |
| MSE | Set file | Magic Set Editor | |
| MSG | Message base (e.g. HMB) | ||
| MSG | Message text file (ASCII) | Microsoft Outlook | |
| MSG | ZVoice digitized voice file | ||
| MSI | Windows Installer Package | Windows Operating Systems | |
| MSO | Microsoft Word OLE Web Page Storage Stream | Microsoft Office | |
| MSO | Microsoft Outlook metadata for a Microsoft Word 2000 email attachment | Microsoft Outlook | |
| MSP | Bitmap graphics file | Microsoft Paint | |
| MSP | Graphics format | Microsoft Paint | |
| MSPRODUCER | Media Project | Microsoft Producer (for Microsoft PowerPoint XP/2003) Project | |
| MSQM | data | Microsoft Message Queuing | |
| MSN | Project | National Instruments for NI MultiSim-Electronic Circuit simulator | |
| MSS | Manuscript text file | Perfect Writer – Scribble – MINCE – Jove | |
| MST | Document | MS Test | |
| MST | Minispecification file | Prosa | |
| MST | Setup script file | Microsoft Windows SDK | |
| MSW | Text file | Microsoft Word | |
| MSX | CP/M archive | MSX | |
| MTH | Math file | Derive | |
| MTL | Wavefront | ||
| MTM | Music format | MultiTracker | |
| MTS | Master Track Pro Files | MTPro 4 | |
| MTS | data | EA Sports F1 series, car physics | |
| MTV | MTV Ray Tracer graphic file | ||
| MTW | Datafile | Minitab | |
| MU | Quattro pro for DOS Menu definition file | Quattro Pro | |
| MUS | Finale music document | Finale | |
| MUS | Music format (MIDI in Doom) | ||
| MUS | Sound file | MusicTime | |
| MUZ | Hover Game MIDI File | Windows' Hover! Game | |
| MVF | Stop frame file | AutoCAD AutoFlix | |
| MVI | Movie command file | AutoCAD AutoFlix | |
| MVO | Data | Mad Virgin 3D object | |
| MVW | Log file | Saber LAN | |
| MWF | Animation | ProMotion | |
| MWS | MWave DSP synths instrument | AWAVE | |
| MXF | Material exchange format (RFC 4539, SMPTE 377M) | ||
| MXL | PackRat 5.0 support DLLs | PackRat 5.0 | |
| MXM | Material | Maxwell Render | |
| MXP | Adobe Extension File | Adobe Dreamweaver and Adobe Flash | |
| MXP | 3ds Max Configuration File | 3ds Max | |
| MXP | MasterCook exported recipe | ||
| MXT | Data | Microsoft C | |
| MYP | Presentation | MM Make Your Point | |
| MZ | Binary-format Map | MazeEdit | |
| MZE | Text-format Map | MazeEdit | |
| MZG | Binary-format Map Collection | MazeEdit | |
| MZX | Binary-format Encrypted Map | MazeEdit |
Read more about this topic: List Of File Formats (alphabetical)