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Alphabetic File Extension List

This list will take for a moment to be fully loaded as the file extension lists are quite long. These lists contain information about the extension name, the name of the program, and the creator's company. Click on the extension to see the detail page. The total extensions in this list: 219.

Extension Information
M2TS Blu-ray BDAV MPEG-2 Transport Stream (Blu-ray Disc Association)
M3U MP3 Playlist File
M4A MPEG-4 Audio Layer
M4B MPEG-4 Audio Layer Bookmarkable File
M4P Protected AAC File (Apple Inc.)
M4V MPEG-4 Video File
MAC Geometry II Plus Macro File (Cabrilog)
MAC Macro
MAC Dynamics GP Macro (Microsoft Corporation)
MAN Windows 2000 Mandatory User Profile
MAN Manual
MAN Blaise File (Statistics Netherlands)
MAP 3Com Network Supervisor Network Topolgy Map (3Com)
MAP Pro/ENGINEER (PTC)
MAP Ingres Termcap Mapping File (Computer Associates International, Inc.)
MAR MSN Archive (Microsoft Corporation)
MAR WebSphere Business Modeler Process Model Template (International Business Machines Corp.)
MAR Mozilla Archive (Mozilla)
MAT MATLAB Variables Binary File (The MathWorks, Inc.)
MAT 3D Studio Material Library (Autodesk, Inc.)
MAT Freelancer Model Textures File (Microsoft Corporation)
MATROSKA
MAX OrCAD Layout File (Cadence Design Systems, Inc.)
MAX 3ds Max Studio Max Scene (Autodesk, Inc.)
MAX PaperPort Scanned Image (ScanSoft Inc.)
MB Mathematica Binary File (Wolfram Research, Inc.)
MB Maya Binary Scene (Alias Systems, a division of Silicon Graphics Limited)
MB MapBasic Program (MapInfo Corporation)
MBB MannaBook (MannaBook Software, Inc.)
MBK Atari (Atari)
MBOX Unix Mbox Format Mail File
MBX MapBasic Compiled Program (MapInfo Corporation)
MBX Database Index; dBASE Index
MBX Mailbox Message File
MCD Bleem! Memory Card Save
MCD MinCAD 7 Drawing/Texture (Nemetschek North America Inc.)
MCD VectorWorks Drawing (Nemetschek)
MCF SignIQ Media Collection File (ImpulseLogic)
MCF MAX II Configuration File (Max B.V.)
MCF Media Container Format
MCG
MCW Word for Macintosh Document (Microsoft Corporation)
MCW MacWrite II Macintosh Text File
MD Chaos Desktop Metadata File (Chaos systems AB)
MD Mayura Draw Vector Drawing File (Mayura Software)
MD Mungyodance Data Pack (Empathetic Enteprises)
MD5 fsum MD5 Checksum File (SlavaSoft Inc.)
MD5 Checksum File for .SHN Audio
MD5 IsoBuster MD5 Checksum (Smart Projects)
MDB ProWORX Nxt Memory Data (Schneider Electric)
MDB NEi Nastran Modal Database (Noran Engineering, Inc.)
MDB Access Database (Microsoft Corporation)
MDC MedDC Mail Pouch (Asier Technology Corporation)
MDC PowerPlay Power Cube (Cognos Incorporated)
MDD Database Designer for MySQL Database Diagram (MicroOLAP Technologies LTD)
MDD MacDraft Drawing (Microspot Ltd)
MDE Access MDE Database File (Microsoft Corporation)
MDF SQL Server Master Database File (Microsoft Corporation)
MDF Alcohol 120% CD Image File (Alcohol Software)
MDI Office Document Imaging File (Microsoft Corporation)
MDL Rational Rose Object Design Model (IBM)
MDL Flight Simulator 3D Model File (Microsoft Corporation)
MDL 3D Design Plus Model
MDM Mario Dash Map File
MDMP WinXP Trouble Report (Microsoft Corporation)
MDS SeeYou Raster Map (Naviter)
MDS Media Descriptor CD Image File
MDW Access Workgroup Information (Microsoft Corporation)
MDX MidiEx MIDI System Exclusive Dump
MDX Borland Database Engine Index (Borland Software Corporation)
MDX Rational XDE Model (IBM)
MEM BPM Studio Saved Files for Sampler Functions (ALCATech)
MEM Clarion DOS Database Memo File (SoftVelocity)
MEM Mio Technology Mio Object (Mioplanet Technologies, Inc.)
MENC
META Black & White Creature Mind Meta Data (Microsoft Corporation)
MF MoonFish Track File (Bram Bos)
MF METAFONT Font Description File
MF Manifest Graphic
MF FrameMaker MakerFile (Adobe Systems Incorporated)
MFL Mozilla (Netscape) XUL FastLoad File (Mozilla)
MFT MetaFont Source Formatter Style File
MHT MHTML Document (Microsoft Corporation)
MHTML MHTML Document (Microsoft Corporation)
MIB MyInfo Topic File Backup (Milenix Software Ltd.)
MIB Management Information Base File
MICROSOFT
MICROSTATION
MID Musical Instrument Digital Interface MIDI-sequention Sound
MID MapInfo Interchange Format (MapInfo Corporation)
MIDI Musical Instrument Digital Interface MIDI-sequention Sound
MIF ImageMagick Machine Independent File Format Bitmap (ImageMagick Studio LLC)
MIF EarthLink E-mail Message Index (EarthLink, Inc.)
MIF Systems Management Server (SMS) Management Information Format (Microsoft Corporation)
MIM Multi-Purpose Internet Mail Extensions (MIME) File
MIME Multi-Purpose Internet Mail Extensions (MIME) File
MIX Picture It! Multilayer Picture File (Microsoft Corporation)
MIX PhotoDraw 2000 Multilayer Picture File (Microsoft Corporation)
MIX Command & Conquer Picture/Sound File (Westwood Studios)
MKV Matroska Video Stream (Matroska Association)
MLM Novel Groupwise E-mail File
MM FreeMind Mind Map
MM Meme Virtual Reality World (Immersive Systems Inc.)
MM Xcode Core C Program (Apple Inc.)
MMAP MindManager Brainstorm and Process Control Map (Mindjet)
MMC MicroCase Boundary File (Cengage Learning)
MMC Clipart DLLbackup Autoshape File (Microsoft Corporation)
MMC Office Media Content
MMF AppMind Message Management File (Appmind Software AB)
MMF MathMagic Equation File (InfoLogic, Inc.)
MMF Yamaha SMAF Synthetic Music Mobile Application Format (Yamaha Corporation of America)
MMP MicroMedia Playlist (Demonic Software)
MMP Grand Theft Auto Multiplayer Map File (Rockstar Games)
MMP Bravado Board Output Video Format
MMS JPEG-6b File
MMS Miles Sound Tools
MNO Macromedia Design Notes
MO GNU Gettext Machine Object File (Free Software Foundation)
MO Dymola Simulation
MOD PHP Source Code
MOD Amiga and PC Tracker Module
MOD CATIA Model File (Dassault Systèmes)
MOF MSinfo (Microsoft Corporation)
MOF Systems Management Server (SMS) Managed Object Format (Microsoft Corporation)
MOI JVC Everio Digital Audio File (JVC Americas Corp)
MOI French Text File
MOV QuickTime Video Clip (Apple Inc.)
MOVIE QuickTime Movie (Apple Inc.)
MP EARS Component File
MP Maya Personal Learning Edition (Alias Systems, a division of Silicon Graphics Limited)
MP cGPSmapper Polski Format Mapy -- Polish Map Format (Stanislaw Kozicki)
MP2 MPEG Audio Stream, Layer II
MP2 Masterpoint Red Points File (ABF Masterpoint Centre)
MP3 Masterpoint Green Points File (ABF Masterpoint Centre)
MP3 MPEG Audio Stream, Layer III
MP3 AlbumWrap Wrapped Music File Archive (Infamus Software LLC)
MP4 MPEG-4 Video File
MPA E-Designer (Beijer Electronics)
MPB Maintenance Parts Bin Database (Nhuntsoftware)
MPB MyPhoneExplorer Backup File (Franz Josef Wechselberger)
MPC Musepack Audio File
MPC Collectorz.com MP3 Collector MP3 Collection Data (Collectorz.com)
MPD My Digital Photos Filmstrip (Super Win Software)
MPD File List Creator MP3 Playlist (WenSoftware)
MPD ABC Programming Language Monadic Predicate
MPEG MPEG 1 System Stream
MPF Design Gallery (Microsoft Corporation)
MPF MosASCII Discontinued Project Workspace File (Robert DeFusco)
MPF MainActor Project (MainConcept AG)
MPG MPEG 1 System Stream
MPG ProgDVBR MPEG2 Video File
MPLS Blu-ray Movie Playlist Information (Blu-ray Disc Association)
MPP Project Project (Microsoft Corporation)
MPP Musepack Audio File
MPQ Blizzard Game Data File (Blizzard Entertainment)
MPS MapSource GPS Mapping Interface Waypoints (Garmin Ltd.)
MPS Pocket Streets Map File (Microsoft Corporation)
MPS Casio PDL Pocket Streets Map (Casio Computer Co., Ltd.)
MPT Multipage TIFF Bitmap
MPX Alpha Five Temporary Index Information (Alpha Software, Inc.)
MPX RCA/Lyra Handheld MP3 Player File (RCA)
MRC Bibliographic Data Format
MRK TAPCIS Marked Messsage Commands
MRK CSI Markup File
MRK SleepScan and Ceegraph Stores Technician (User) Comments (Bio-logic Systems Corp.)
MS 3ds Max Script Source Code (Autodesk, Inc.)
MS Maple Worksheet (Maplesoft, a Division of Waterloo Maple Inc.)
MSC Microsoft Management Console Snap-in Control File (Microsoft Corporation)
MSF Netscape Mail Mail Summary File (Netscape)
MSF EarthLink E-mail Message File (EarthLink, Inc.)
MSF Thunderbird Mail Summary File (Mozilla Corporation)
MSG PMMail 2000 E-mail Message File (Blueprint Software Works)
MSG OS/2 Help Message File (IBM)
MSG Exchange Mail Message (Microsoft Corporation)
MSI Cerius2 (Accelrys Software Inc.)
MSI Windows Installer File (Microsoft Corporation)
MSI TruNEST Nesting Data (Magestic Systems, Inc.)
MSM Windows Installer Merge Module (Microsoft Corporation)
MSM Multisim Circuit Diagram (National Instruments Corporation)
MSO Math Script Object File
MSO MedlySound Sound/Module
MSO Word OLE Web Page Storage Stream (Microsoft Corporation)
MSP Windows Installer Patch (Microsoft Corporation)
MSP Paint Bitmap (Microsoft Corporation)
MST Visual Test Source File
MST Windows SDK Setup Transform Script (Microsoft Corporation)
MSU Vista Hotfix Installer Package (Microsoft Corporation)
MSU Blaise File (Statistics Netherlands)
MSV MyStars! Saved View (Relative Data, Inc.)
MSV Memory Stick Compressed Voice File (Sony Corporation of America)
MTA Flight Simulator Maintenance File (Microsoft)
MTD Digital Sheet Music (Big Endian) (Musicnotes, Inc.)
MTF Darkstone Archive
MTF MicroSurfer File
MTF Mediatek Font
MTS AVCHD Video Clip - MPEG Transport Stream
MTS MadTracker Sample File
MTV MTV Video
MTX MadTracker Extension File
MTX Adobe Atmosphere File (Adobe Systems Incorporated)
MTX Marked Text Source File
MUI Amiga MUI Default Class/Library (SASG)
MUS SCORE Music Publishing System Music Notation File (San Andreas Press)
MUS Harmony Assistant, Melody Assistant, Myriad Music plug-in, Melody Player Music File (MYRIAD)
MUS Infinity Game Engine Music Control File (BioWare Corp.)
MUSIC Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
MV IRIX makemovie Command Compressed Movie (Silicon Graphics, Inc.)
MVL Interplay Multimedia File
MVL WinMaven Saved Log File (David R. Snow)
MXD ArcMap GIS Project File (Map) (ESRI)
MXD MX Editor Remote Control Device Configuration File
MXF Material Exchange Format File
MXF SimCity Maxis Font File (Electronic Arts, Inc.)
MXF MX Editor Remote Control File
MXM MixMeister BPM Calculation File (MixMeister Technology)
MXM Mindex Master Index File for a Category
MXP 3-matic Project File (Materialise NV)
MYD MySQL Database (MySQL AB)
MZP MOZART Percussion File (David Webber)

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