List of filename extensions (M–R)

This alphabetical list of filename extensions contains extensions used by multiple notable applications or services.

Main article: List of filename extensions

M
Ext.DescriptionUsed by
M[1] Mathematica Package File Mathematica
M MATLAB M-File MATLAB
M Mercury Source File Mercury
M[2] Source code Objective-C
M2TS BDAV MPEG-2 transport stream
M3U MPEG Audio Layer 3 Uniform Resource Locator playlist Media players
M3U8 MPEG Audio Layer 3 Uniform Resource Locator playlist, using UTF-8 encoding Media players
M3U MPEG Audio Layer 3 Uniform Resource Locator playlist Media players
M4A MPEG-4 Part 14 audio iTunes Store
M4P DRM-encumbered MPEG-4 Part 14 media iTunes Store (formerly)
M4R See M4A Apple iPhone ringtones
M4V MPEG-4 Part 14 video, which may optionally be encumbered by FairPlay DRM iTunes Store, Handbrake
M64 "An M64 file contains a recording of gameplay captured by Mupen64, a cross-platform Nintendo 64 (N64) emulator. It contains user inputs recorded during gameplay so that the exact gameplay can be replayed in the software by a user."[3] Mupen64
MCF[4] Multimedia Container Format (predecessor of Matroska)
MD[5] Markdown-formatted text file Markdown
MDF[6] Master Data File, a Microsoft SQL Server file type Microsoft SQL Server
MDF Measurement Data Format, a binary file format for vector measurement data[7] automotive industry, developed by Robert Bosch GmbH
MDI Document save in high-resolution, created by MSOffice to scan documents (OCR) and turn them into a .DOC Microsoft Office
MDG Digital Geometry (Programmable CAD) file format, developed by DInsight Digital Geometric Kernel
MDL Model 3D Design Plus or Simulink
MDS Midi Session Sound Imp.
MEX[8] MEX file (executable command) Matlab
MGF[9] Materials and Geometry Format
MID Standard MIDI file music synthetizers, Winamp
MK3D Matroska stereoscopic video container
MKA Matroska audio container
MKS Matroska subtitle container
MKV Matroska video container
MM[2] Source code Objective-C++
MMDC MediaMonkey Device Settings MediaMonkey
MMIP MediaMonkey Add-on Installation Package MediaMonkey
MMPZ LMMS Compressed Project File LMMS
MNT Surface metrology or image analysis document MountainsMap
MOBI[10] eBook Mobipocket, Kindle
MOD AMPL model file AMPL
MOD Modula language source
MOD Modula-2 source code file Clarion Modula-2
MODULES Module GTK+
MOL MDL Molfile RasMol
MOL2[11][12] Tripos Sybyl MOL2 Format SYBYL, RasMol
MOP MOPAC input file MOPAC, RasMol
MOV[13] Animation format (Mac) QuickTime, AutoCAD AutoFlix
MP2[14][15] Mpeg audio file Winamp, xing
MP3[16][17] MPEG audio stream, layer 3 AWAVE, CoolEdit(+PlugIn), Winamp, many others
MP4[18] multimedia container format, MPEG 4 Part 14 Winamp
MPA MPEG audio stream, layer 1,2,3 AWAVE
MPC Musepack audio
MPD LDraw file (multi-part DAT file) LDraw
MPEG[19][20][21] multimedia containter format, video, audio MPEG Player, Winamp
MPG see MPEG
MSC management saved console[22] Microsoft; Microsoft MMC[23]
MSCX MuseScore file MuseScore
MSCZ Compressed MuseScore file MuseScore
MSDL[24] Manchester Scene Description Language
MSF[25][26] Multiple sequence file (Pileup format)
MSI Windows Installer Package Microsoft Windows
MSO Microsoft Outlook metadata for a Microsoft Word 2000 email attachment[27] Microsoft Outlook
MSSTYLES Windows visual style file Microsoft Windows
MSU Microsoft Update Package Microsoft Windows
MTS See M2TS
MXF[28][29] Material exchange format (RFC 4539, SMPTE 377M)
MYD a MyISAM data file in MySQL MyISAM, MySQL
MYI a MyISAM index file in MySQL MyISAM, MySQL

N
Ext.DescriptionUsed by
NB Wolfram Mathematica Notebook (see Wolfram Language) Mathematica
NC Binary Data netCDF software package
NC Instructions for NC (Numerical Control) machine CAMS
NC Name code program namec-git/namec software package
NCD NC Drill File (Excellon Format, printed circuit board hole definitions) Most PCB layout software
NEF[30] Nikon RAW image format Nikon cameras
NEU Pro/Engineer neutral file format PTC Pro/Engineer
NFO iNFO for accompanying media files Kodi, Plex
NIM Nim source code file Nim
NMF Node Map File Used by SpicyNodes
NPR Nuendo Project File Steinberg Nuendo
NRW[31] Nikon Coolpix RAW image Nikon
NS1 NetStumbler file NetStumbler
NSA media Nullsoft Streaming Audio
NSF NES sound format file Transfer of NES music data[32]
NSV media Nullsoft Streaming Video
NUMBERS Numbers spreadsheet file Numbers
NWD, NWF Navisworks 3D drawing Navisworks

O
Ext.DescriptionUsed by
O Object file UNIX - Atari - GCC
OBJ Compiled machine language code
OBJ Object code Intel Relocatable Object Module
OBJ Wavefront Object
OBS Script ObjectScript
OCX OLE custom control
ODB[33] Database front end document OpenDocument, LibreOffice
ODF[33] Formula, mathematical equations OpenDocument, LibreOffice
ODG[33] Drawings and vector graphics OpenDocument, LibreOffice, Collabora Online
ODP[33] Presentations OpenDocument, LibreOffice, Collabora Online
ODS[33] Spreadsheets OpenDocument, LibreOffice, Collabora Online
ODT[33] Text (Word processing) documents OpenDocument, LibreOffice, Collabora Online
OGA Audio file in the Ogg container format libogg
OGG Vorbis audio in the Ogg container format libogg
OGV Video file in the Ogg container format libogg
OGX Ogg Multiplex Profile libogg
OPUS Ogg/Opus audio file mpv, mplayer, many others (official file format).
ORG Emacs Org mode Emacs Org mode major mode
ORG Older Origin Project Origin versions 4 or earlier
OSC OpenStreetMap Changeset OpenStreetMap
OSK Osu! Skin Osu!
OSM OpenStreetMap data OpenStreetMap
OSM OpenStreetMap note OpenStreetMap
OST Offline Storage Table Microsoft e-mail software: Outlook Express, Microsoft Outlook
OSZ Osu! Beatmap Osu!
OTB Over-the-air bitmap graphics
OTF OpenType font
OTL The Vim Outliner A vim plugin
OTF[33] Formula, mathematical equations template OpenDocument, LibreOffice, Collabora Online
OTG[33] Drawings and vector graphics template OpenDocument, LibreOffice, Collabora Online
OTP[33] Presentations template OpenDocument, LibreOffice, Collabora Online
OTS[33] Spreadsheets template OpenDocument, LibreOffice, Collabora Online
OTT[33] Text (Word processing) documents template OpenDocument, LibreOffice, Collabora Online
OV2 Overlay file (part of program to be loaded when needed) TomTom Point of Interest
OWL[34][35] Web ontology language (OWL) file Protégé and other ontology editors
OXT OpenOffice.org extension OpenOffice.org / LibreOffice

P
Ext.DescriptionUsed by
P Database PROGRESS source code PROGRESS
P PASCAL source code file
P Parser source code file
P10 Certificate Request
P12 Personal Information Exchange "Crypto Shell Extensions"
PACK[36] Pack200 Packed Jar File
PAGES Pages document file Pages
PAK Archive Pak
PAL Paint Shop Pro color palette (JASC format) PaintShop Pro, XnView
PAM PAM Portable Arbitrary Map graphics format Netpbm
PAR Parity Archive [37]
PAR2 Parity Archive v2 [38]
PAS Pascal language source Borland Pascal
PBLIB Power Library PowerBASIC
PBO A file type used by Bohemia Interactive Arma 3, PBO Manager
PCL[39][40] HP-PCL graphics data file HP Printer Command Language
PCS PCSurvey file PCSurvey by Softart - Land Surveying Software
PDB[41] debugging data Microsoft Windows
PDB[42] Molecule (protein data bank)
PDE source code file Processing programming language
PDF Adobe's Portable Document Format Adobe Acrobat Reader
PDI Portable Database Image
PDM Program Deskmate
PDM PowerDesigner's physical data model (relational model) file format PowerDesigner
PDM Visual Basic (VB) Project Information File Visual Basic
PDN Image file Paint.NET
PDS PALASM Design Description
PDS Planetary Data System Format
PEM A text-based certificate file defined in RFC 1421 through RFC 1424[43] Applications that need to use cryptographic certificates, including web-servers
pet package[44] Puppy Linux
PFA PostScript Font File
PFA Type 3 font file (unhinted PostScript font)
PFAM PFAM format[45]
PFB PostScript font Adobe Type Manager (ATM)
PFC (Personal Filing Cabinet) contains e-mail, preferences and other personal information AOL
PFM[46] PostScript Type 1 font metric file Microsoft Windows, Adobe Acrobat Reader
PFM[46] Windows Type 1 font metric file
PGN[47] Portable Game Notation -Text specification for Chess game Most chess playing computer applications
PFX An encrypted certificate file[43] Applications that need to use cryptographic certificates, including web-servers
PHP PHP file
PHP3 PHP 3 file
PHP4 PHP 4 file
PHY Phylip format[45]
PHF Database File Nuverb Systems Inc: Donarius
PHR Phrases LocoScript
PI2 Portrait Innovations High Resolution Encrypted Image file Portrait Innovations Studio2 (proprietary)
PIE GlovePIE script file GlovePIE
PIR PIR format[45]
PIT Compressed Mac file archive created by PACKIT unpackit.zoo
PIT Partition Information Table for Samsung's smartphone with Android Odin3
PKL Pickle file Python object serialization
PKA Archive PKARC
PL Perl source code file
PL Prolog source code file
PL IRAF pixel list IRAF astronomical data format
PLI PL/I source file PL/I compilers
PLR Terraria player/character file Terraria
PM[48] Perl module
PMA PMarc Archive
PNG Portable Network Graphics file Web browsers, image viewing and editing applications
POM[49] Build manager configuration file Apache Maven POM file
PPTX MS Office Open-XML Presentation Microsoft PowerPoint[50]
PPSX MS Office Open-XML Auto-Play Presentation Microsoft PowerPoint
PRJ Mkd (Unix command) Mkd project file to extract documentation
PROTO[51] Message specification Google Protocol Buffers
PRP Plasma Registry Page Plasma (engine)
PS Adobe Postscript file PostScript
PSD[52] Photoshop native file format Adobe Photoshop
PSDC Photoshop Cloud Document Adobe Photoshop
PSM1[53] Windows Powershell module Windows Powershell
PSPPALETTE[54] Paint Shop Pro color palette (JASC format) Paint Shop Pro 8.0 and newer
PST Archive File Microsoft Outlook
PS1 Windows Powershell script[53] Windows PowerShell
PTF PlayStation Portable Theme file PSP Theme settings menu
PTF Pro Tools Session File Digidesign/Avid Pro Tools version 7 up to version 9
PTS Pro Tools Session File Digidesign Pro Tools (legacy version)
PTX Pro Tools Session File Avid Pro Tools version 10 or later
PUB Public key ring file Pretty Good Privacy RSA System
PUP[25][26] Pileup format
PY Python script file Python (programming language)

Q
Ext.DescriptionUsed by
QFX Quicken-specific implementation of the OFX specification Intuit Quicken
QIF[55] Quicken Interchange Format Intuit Quicken
QLC[46] ATM Type 1 fonts script Adobe Type Manager
QT QuickTime movie (animation)
QTVR QuickTime VR Movie

R
Ext.DescriptionUsed by
R Ratfor file Ratfor
R Script file R
R00, R01, ... Part of a multi-file RAR archive RAR
R2D Reflex 2 datafile Reflex 2
R3D Red Raw Video (raw video data created with a Red camera) Red Camera
R8P PCL 4 bitmap font file Intellifont
RAD 2-op FM music Reality AdLib Tracker
RAD Radiance Radiance
RAL Remote Access Language file Remote Access
RAM Ramfile RealAudio
RAP Flowchart RAPTOR
RAR Archive RAR
RAS Graphics format SUN Raster
RB Ruby Script file
RBXM Roblox "model" Roblox
RBXL Roblox "level" Roblox
RC Configuration file emacs, Vim (text editor), Bash (Unix shell)
RC[56] Resource Compiler script file Microsoft C/C++, Borland C++
RDP[57] RDP connection Remote Desktop connection
RDS[58] Data file R
RES[59] Compiled resource Microsoft C/C++, Borland C++
RKT Racket language source file DrRacket integrated development environment (IDE) for the Racket (programming language)
RM[60] RealMedia RealPlayer
RMD [61] R Markdown RStudio
RMVB[62] RealMedia Variable Bitrate RealPlayer
RPM Red Hat Package Manager Red Hat Linux
RS Rust language source
RSL, RSLS, RSLF Resilio Sync File Placeholder
RST reStructuredText Docutils
RTF[63][64][65] Rich Text Format text file (help file script) many - Microsoft Word
RUN AMPL script file AMPL
RUN Makeself shell self-extracting archive shell

See also

References
  1. "What Is a Mathematica Package?". Wolfram. Retrieved 2020-09-15.
  2. Dalrymple, Mark; Knaster, Scott (29 June 2012). Learn Objective-C on the Mac. p. 9. ISBN 9781430241881. The .m extension originally stood for "messages" when Objective-C was first introduced, referring to a central feature of Objective-C
  3. "M64 File Extension - What is an .m64 file and how do I open it?". fileinfo.com. Retrieved 2022-01-14.
  4. "MCF specification, introduction". free.fr. Retrieved 2020-09-18.
  5. "RFC 7763 - The text/markdown Media Type".
  6. "Database Files and Filegroups". microsoft.com. 2020-05-29. Retrieved 2020-08-28.
  7. "ASAM MDF". Retrieved 2020-09-18.
  8. "Mex-Files". octave.org. Retrieved 2020-09-18.
  9. "The Materials and Geometry Format". May 1995. Retrieved 2020-09-18.
  10. "Mobipocket File Format". loc.gov. 2019-02-20. Retrieved 2020-09-18.
  11. "Tripos Mol2 File Format" (PDF). ccnu.edu.cn. Retrieved 2020-09-21.
  12. "SYBYL MOL2 Format". yale.edu. 1998. Retrieved 2020-09-21.
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