File Extension Database 
The Cyber Tech Help File Extension Database is a searchable A-Z of file extensions.
To use the File Extension Database simply click on the first letter of the extension you are looking for.
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Your Results are as follows :
- .M - Function (program) (Matlab)Macro module (Brief)Standard package (Mathematica)
- .M11 - Text file (MASS11)
- .M2P - MPEG-2 Program Stream Format file
- .M2V - MPEG-2 Video Only file
- .M3 - Modula 3 source code file
- .M3D - 3d animation macro
- .M3U - Music Playlist (Winamp)
- .M4 - M4 preprocessor file (unix)
- .MA3 - Macro (Harvard Graphics 3.0)
- .MAC - Bitmap graphics (Macintosh MacPaint)Macro
- .MAD - MS Access Module Shortcut
- .MAG - Woody Lynn's MAG graphics format (MPS Magro Paint System)
- .MAI - Mail (VAX)
- .MAK - MakefileProject file (Visual Basic)
- .MAN - Command manual
- .MAP - Color paletteFormat data (Micrografx Picture Publisher)Linker map fileMap (Atlas MapMaker)Network map (AccView)
- .MAR - Assembly program (VAX Macro)
- .MAS - Smartmaster set (Freelance Graphics)
- .MAT - Data file (Matlab)
- .MAX - Max source code fileMicrosoft Data Analyser View
- .MB - Memo field values for database (Paradox)
- .MBF - MS Money Backup file
- .MBK - Multiple index file backup (dBASE IV)
- .MBX - Mailbox (Eudora/Zerberus)
- .MCC - Configuration file (Mathcad)
- .MCD - Document (Mathcad)
- .MCF - Mathcad fontMeta Content Format fileMaster Command fileTMPGEnc template
- .MCI - Mci command script (Media Control Interface)
- .MCP - Application script (Capsule)Printer driver (Mathcad)
- .MCR - DataCAD Keyboard macro file
- .MCW - Text file (MacWrite II)
- .MCX - Graphic file
- .MD - Compressed file archive created by MDCD (mdcd10.arc)
- .MD5 - Message Digest 5 (Easy MD5 Creator)
- .MDA - Data (MS Access)
- .MDB - Database (MS Access)
- .MDF - Accelio Capture Classic (JetForm) FillerI-deas Master Drafting Machine Data fileMenu Definition fileMS-SQL Master Database file
- .MDL - Model (3D Design Plus)Spreadsheet (CA-Compete!)
- .MDM - Modem definition (TELIX)
- .MDR - FaxTalk Modem Doctor Modem Report file
- .MDT - Data table (MS ILink incremental linker)
- .MDX - Multiple index file (dBASE IV)
- .MDZ - MS Access Wizard Template
- .ME - Usually ASCII text file READ.ME
- .MEB - Macro Editor bottom overflow file (WordPerfect Library)
- .MED - Macro Editor delete save (WordPerfect Library)Music (OctaMED)
- .MEM - Macro Editor macro (WordPerfect Library)Memory variable save file (Clipper - dBASE IV - FoxPro)
- .MEQ - Macro Editor print queue file (WordPerfect Library)
- .MER - Macro Editor resident area (WordPerfect Library) (vakioalue)
- .MES - Macro Editor work space file (WordPerfect Library)Message
- .MET - Document (Omnipage Pro)eDonkey2000 fileMacro Editor top overflow file (WordPerfect Library)Presentation Manager Meta file
- .MEU - Menu group (DOS Shell)
- .MEX - Mex file (executable command) (Matlab)Macro Editor expound file (WordPerfect Library)Mioplanet mex reader interactive file
- .MF - Metafont text file
- .MGF - Font (Micrografx)
- .MHP - MS Home Publishing Project
- .MHT - MS MHTML Document
- .MIB - Snmp MIB file
- .MIC - Microsoft Image Composer file
- .MID - Standard MIDI file (music synthetizers)
- .MIF - Maker Interchange Format (FrameMaker)
- .MII - Datafile (MicroStat-II)
- .MIM - MIME file
- .MIO - Multimedia Interactive Object
- .MIP - Paint Shop Pro Multiple Image Print file
- .MIS - Delta Force Land Warrior MissionMagicInstall Installation ScriptTribes 2 Game file
- .MIX - Object file (Power C)
- .MK - Makefile
- .MKE - Makefile (MS Windows SDK)
- .MKI - Japanese graphics MAKIchan format (MagView 0.5)
- .MKS - Data (TACT)
- .ML3 - Project (Milestones 3.x)
- .MLB - Macro library file (Symphony)
- .MLM - Novel Groupwise e-mail file
- .MM - Text file (MultiMate Advantage II)
- .MMC - Media Catalog MSoffice Media Content
- .MMD - Peristudio/PeriProducer file
- .MMF - Mail message file (MS Mail)
- .MML - Mail Meta Language
- .MMM - Movie (RIFF RMMP format) (MacroMind Director 3.x)
- .MMO - Memo writer file (RapidFile)
- .MMP - Output video format from Bravado board
- .MMX - Command & Conquer Red Alert 2 Map file / Oracle Forms Compiled Menu
- .MMZ - MusicMatch Theme file
- .MND - Menu source (AutoCAD Menu Compiler)
- .MNG - Map (DeLorme Map'n'Go)
- .MNT - Menu memo (FoxPro)
- .MNU - Advanced macro (HP NewWave)Menu (AutoCAD Menu Compiler - Norton Commander - Signature)
- .MNX - Compiled menu (AutoCAD)Menu (FoxPro)
- .MNY - Account book (MS Money)
- .MOB - Device definition (PEN Windows)
- .MOD - Modula-2 source code file (Clarion Modula-2)Windows kernel moduleMusic (FastTracker - many)
- .MOL - MDL Molfile
- .MON - Monitor description (ReadMail)
- .MOV - QuickTime Video ClipApple QuickTime AudioAutoCAD AutoFlix Movie
- .MP2 - Mpeg audio file (xing)
- .MP3 - mp3PRO Audio fileMPEG Audio Stream, Layer IIISHARP MZ-series Emulator fileWrapster Wrapped file
- .MP4 - MPEG-4 Video File
- .MPC - Calender file (MS Project)
- .MPD - MS Project database file
- .MPE - MPEG Movie Clip
- .MPF - MS Design GalleryMosASCII Project Workspace file
- .MPG - Mpeg animation
- .MPM - Mathplan macro (WordPerfect Library)
- .MPP - Project file (MS Project)CAD Drawing File
- .MPQ - Blizzard Game Data file
- .MPR - Generated program (FoxPro)
- .MPS - Multimedia FileCasio PDL Pocket Streets Map
- .MPT - Bitmap graphics (Multipage TIFF)Template File (MS Project)
- .MPV - View file (MS Project)
- .MPW - MosASCII Project Workspace file
- .MPX - Compiled menu program (FoxPro)
- .MRB - Multiple Resolution Bitmap graphics (MS C/C++)
- .MRC - MIRC Script fileBibliographic Data Format
- .MRK - Informative Graphics markup file
- .MRS - Macro Resource file (WordPerfect for Win)
- .MSC - MS C makefile
- .MSD - MS Diagnostic Utility Report
- .MSF - Multiple Sequence file
- .MSG - Message
- .MSI - Windows Installer file
- .MSM - MultiSIM Circuit Diagram
- .MSO - Math Script Object fileMS FrontPage fileMS Word OLE Web Page Storage Stream
- .MSP - Bitmap graphics (Microsoft Paint)
- .MSPX - XML based Web Page
- .MSS - Manuscript text file (Perfect Writer - Scribble - MINCE - Jove)
- .MST - ChemFinder Chemical Structure IndexDATAIR Pension System Master fileMinispecification file (Prosa)Setup script (MS Windows SDK)Visual Test Source file
- .MSV - Sony Memory Stick Format
- .MSW - Text file (MS Word)
- .MSX - Compressed CP/M file archive created by MSX
- .MTD - Digital Sheet Music
- .MTH - Math file (Derive)
- .MTM - Multitracker Module music
- .MTS - Viewpoint iPix file
- .MTW - Datafile (Minitab)
- .MTX - Temporary File often used by a browser or TWAIN deviceViewpoint iPix file
- .MU - Menu (Quattro Pro)
- .MU3 - Myriad Music file (packed sounds & digital tracks)
- .MUF - ProtoMuck Multi User Forth Program
- .MUL - Ultima Online Game
- .MUS - MusicTime Sound fileMyriad Music file
- .MVB - DatabaseMS Multimedia viewer file
- .MVC - Music Collector Collection Manager file
- .MVD - MicroDVD (DVD movie file)
- .MVF - Stop frame file (AutoCAD AutoFlix)
- .MVI - Movie command file (AutoCAD AutoFlix)
- .MVW - Log file (Saber LAN)
- .MWF - Animation (ProMotion)
- .MWP - Lotus Wordpro 97 Smartmaster fileMegaWorks Pack file
- .MWV - MovieWorks file
- .MXD - GIS Project file
- .MXE - Macro ExpressMindex Effect Album
- .MXF - Material eXchange Format
- .MXM - MS Project/Outlook Team Assign Task
- .MXP - Macromedia Extension ManagerArcReader Published Map
- .MXT - Data (MS C)
- .MYP - Presentation (MM Make Your Point)
- .MYR - Myriad Music file
- .MYS - Myst Saved Game
- .MYT - Myriad Tutorial fileFunction (program) (Matlab)Macro module (Brief)Standard package (Mathematica)
- .M_U - Backup of boot sector, FAT and boot dir (MazeGold)
You searched for the letter M.
