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

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 Mupen64 gameplay recording[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
MHT MIME encapsulation of aggregate HTML documents Web Browsers
MID Standard MIDI file music synthetizers, Winamp
MKA Matroska audio
MKV Matroska video
MM[2] Source code Objective-C++
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]
MSAV Mindustry map file Mindustry[24]
MSDL[25] Manchester Scene Description Language
MSF[26][27] Multiple sequence file (Pileup format)
MSI Windows Installer Package Microsoft Windows
MSO Microsoft Outlook metadata for a Microsoft Word 2000 email attachment[28] Microsoft Outlook
MSSTYLES Windows visual style file Microsoft Windows
MSU Microsoft Update Package Microsoft Windows
MTS See M2TS
MXF[29][30] 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
NDS Nintendo DS file. Used for Homebrew and official games. Nintendo DS Consoles and Emulators
NEF[31] Nikon RAW image format Nikon cameras
NEU Pro/Engineer neutral file format PTC Pro/Engineer
NF Instructions for NC machine made by TRUMPF TRUMPF
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
NRO Nintendo Switch executable file
NRW[32] Nikon Coolpix RAW image Nikon
NS1 NetStumbler file NetStumbler
NSA media Nullsoft Streaming Audio
NSF NES sound format file Transfer of NES music data[33]
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[34] Database front end document OpenDocument, LibreOffice
ODF[34] Formula, mathematical equations OpenDocument, LibreOffice
ODG[34] Drawings and vector graphics OpenDocument, LibreOffice, Collabora Online
ODP[34] Presentations OpenDocument, LibreOffice, Collabora Online
ODS[34] Spreadsheets OpenDocument, LibreOffice, Collabora Online
ODT[34] 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[34] Formula, mathematical equations template OpenDocument, LibreOffice, Collabora Online
OTG[34] Drawings and vector graphics template OpenDocument, LibreOffice, Collabora Online
OTP[34] Presentations template OpenDocument, LibreOffice, Collabora Online
OTS[34] Spreadsheets template OpenDocument, LibreOffice, Collabora Online
OTT[34] 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[35][36] 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[37] 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 [38]
PAR2 Parity Archive v2 [39]
PAS Pascal language source Borland Pascal
PAX pax archive file pax, GNU Tar
PBLIB Power Library PowerBASIC
PBO A file type used by Bohemia Interactive Arma 3, PBO Manager
PCL[40][41] HP-PCL graphics data file HP Printer Command Language
PCS PCSurvey file PCSurvey by Softart - Land Surveying Software
PCX PC Paintbrush file PC Paintbrush
PDB[42] debugging data Microsoft Windows
PDB[43] Molecule (protein data bank)
PDE Processing 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[44] Applications that need to use cryptographic certificates, including web-servers
pet package[45] Puppy Linux
PFA PostScript Font File
PFA Type 3 font file (unhinted PostScript font)
PFAM PFAM format[46]
PFB PostScript font Adobe Type Manager (ATM)
PFC (Personal Filing Cabinet) contains e-mail, preferences and other personal information AOL
PFM[47] PostScript Type 1 font metric file Microsoft Windows, Adobe Acrobat Reader
PFM[47] Windows Type 1 font metric file
PGN[48] Portable Game Notation -Text specification for Chess game Most chess playing computer applications
PFX An encrypted certificate file[44] Applications that need to use cryptographic certificates, including web-servers
PHF Database File Nuverb Systems Inc: Donarius
PHN Phun scene Algodoo (previously Phun)
PHP PHP file
PHP3 PHP 3 file
PHP4 PHP 4 file
PHR Phrases LocoScript
PHY Phylip format[46]
PHZ Algodoo scene Algodoo
PI2 Portrait Innovations High Resolution Encrypted Image file Portrait Innovations Studio2 (proprietary)
PIE GlovePIE script file GlovePIE
PIR PIR format[46]
PIT Compressed Mac file archive created by PACKIT unpackit.zoo
PIT Partition Information Table for Samsung's smartphone with Android Odin3
PK3 Quake III engine game data
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
PLS Multimedia Playlist, primarily for streaming Shoutcast, IceCast, others
PM[49] Perl module
PMA PMarc Archive
PNG Portable Network Graphics file Web browsers, image viewing and editing applications
POM[50] Build manager configuration file Apache Maven POM file
PPEG parsimonious PEG grammar parsimonious parser generator
PPTX MS Office Open-XML Presentation Microsoft PowerPoint[51]
PPSX MS Office Open-XML Auto-Play Presentation Microsoft PowerPoint
PRJ Mkd (Unix command) Mkd project file to extract documentation
PROTO[52] Message specification Google Protocol Buffers
PRP Plasma Registry Page Plasma (engine)
PS Adobe Postscript file PostScript
PSD[53] Photoshop native file format Adobe Photoshop
PSDC Photoshop Cloud Document Adobe Photoshop
PSM1[54] Windows Powershell module Windows Powershell
PSPPALETTE[55] Paint Shop Pro color palette (JASC format) Paint Shop Pro 8.0 and newer
PST Archive File Microsoft Outlook
PS1 Windows Powershell script[54] 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[26][27] Pileup format
PY Python script file Python (programming language)

Q

Ext.DescriptionUsed by
QFX Quicken-specific implementation of the OFX specification Intuit Quicken
QIF[56] Quicken Interchange Format Intuit Quicken
QLC[47] ATM Type 1 fonts script Adobe Type Manager
QOI Quite OK Image Format Web browsers, image viewing and editing applications
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
RC Configuration file emacs, Vim (text editor), Bash (Unix shell)
RC[57] Resource Compiler script file Microsoft C/C++, Borland C++
RDP[58] RDP connection Remote Desktop connection
RDS[59] Data file R
RES[60] Compiled resource Microsoft C/C++, Borland C++
RKT Racket language source file DrRacket integrated development environment (IDE) for the Racket (programming language)
RM[61] RealMedia RealPlayer
RMD [62] R Markdown RStudio
RMVB[63] RealMedia Variable Bitrate RealPlayer
Rob Robot4 (TM) Input file format Robot4 software
ROL AdLib Piano Roll AdLib Visual Composer
RPM RPM software package Red Hat Linux, the Linux Standard Base and several other operating systems
RS Rust language source
RSL, RSLS, RSLF Resilio Sync File Placeholder
RST reStructuredText Docutils
RTF[64][65][66] 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. 1 2 Dalrymple, Mark; Knaster, Scott (29 June 2012). Learn Objective-C on the Mac. Apress. 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.
  13. ↑ "Introduction to QuickTime File Format Specification". apple.com. 2016. Retrieved 2020-09-21.
  14. ↑ "The audio/mpeg Media Type - RFC 3003". IETF. November 2000. Retrieved 2009-12-07.
  15. ↑ "MIME Type Registration of RTP Payload Formats – RFC 3555". IETF. July 2003. Retrieved 2009-12-07.
  16. ↑ "Happy Birthday MP3!". Fraunhofer IIS. 12 July 2005. Retrieved 18 July 2010.
  17. ↑ "The audio/mpeg Media Type — RFC 3003". IETF. November 2000. Retrieved 7 December 2009.
  18. ↑ 3GPP2 (18 May 2007). "3GPP2 C.S0050-B Version 1.0, 3GPP2 File Formats for Multimedia Services" (PDF). 3GPP2. pp. 67, 68. Archived from the original (PDF) on 7 October 2009. Retrieved 2009-06-12.{{cite web}}: CS1 maint: numeric names: authors list (link)
  19. ↑ ISO/IEC 13818-1:2000 - Information technology -- Generic coding of moving pictures and associated audio information: Systems (PDF), neuron2.net, 2000-12-01, archived from the original (PDF) on 2010-06-11
  20. ↑ ITU-T. "H.222.0 : Information technology - Generic coding of moving pictures and associated audio information: Systems". Retrieved 2010-06-03.
  21. ↑ ITU-T (May 2006). "H.222.0 Summary". Archived from the original on 2011-05-19. Retrieved 2010-06-03.
  22. ↑ Zvereva, O. M. (2004). "Часть 2: ОПЕРАЦИОННАЯ СИСТЕМА WINDOWS 2000 PROFESSIONAL: КОНСОЛИ УПРАВЛЕНИЯ. ТИПОВЫЕ ЗАДАЧИ АДМИНИСТРИРОВАНИЯ" [Part 2: The Windows 2000 Professional operating system: Control console; standard administration tasks] (PDF). ОПЕРАЦИОННЫЕ СИСТЕМЫ (in Russian). Yekaterinburg. p. 99. Archived from the original (PDF) on April 26, 2012. Retrieved 2010-03-18. Несколько оснасток могут быть объединены администратором в инструмент (также называется документом), который сохраняется в файле с расширением .msc (Management Saved Console). [Translation: An administrator can gather a few frameworks into an instrument (also known as a document) stored in a file with the suffix .msc (Management Saved Console).]
  23. ↑ Shields, Paul; Crump, Ralph; Weiss, Martin (2000). Windows 2000 server: system administration handbook. Global knowledge professional reference. Syngress. pp. 51–52. ISBN 978-1-928994-09-1. Retrieved 2010-03-18. A powerful feature of the MMC [...] enables administrators to create custom tools [...], simply snap in the desired tools, and then the console can be saved as a Management Saved Console (MSC) file [...]
  24. ↑ "Mindustry", Wikipédia (in French), 2023-08-26, retrieved 2023-11-09
  25. ↑ "MSDL - Manchester Scene Description Language". Retrieved 2020-09-18.
  26. 1 2 Accelrys (1998-10-02). "QUANTA: Protein Design. 3. Reading and Writing Sequence Data Files". Université de Montréal. Retrieved 2020-03-27.
  27. 1 2 Li H.; Handsaker B.; Wysoker A.; Fennell T.; Ruan J.; Homer N.; Marth G.; Abecasis G.; Durbin R; 1000 Genome Project Data Processing Subgroup (2009) (2009). "The Sequence alignment/map (SAM) format and SAMtools". Bioinformatics. 25 (16): 2078–2079. doi:10.1093/bioinformatics/btp352. PMC 2723002. PMID 19505943.{{cite journal}}: CS1 maint: numeric names: authors list (link)
  28. ↑ "Article ID: 222330". Microsoft Support. Microsoft. 2004-08-13. Archived from the original on 2011-06-04. Retrieved 2010-02-10. When sending HTML messages with an attached Microsoft Office 2000 document, the message is sent as an Outlook HTML message [...]. The Oledata.mso file contains necessary information to properly render the attachment in the message in its originating program.
  29. ↑ ST 372:2017 - SMPTE Standard - Dual Link 1.5 Gb/s Digital Interface for 1920 × 1080 and 2048 × 1080 Picture Formats. Institute of Electrical and Electronics Engineers. 2017-11-01. pp. 1–24. doi:10.5594/SMPTE.ST372.2017. ISBN 978-1-68303-110-9. Retrieved 2020-09-18. {{cite book}}: |journal= ignored (help)
  30. ↑ "RFC 4539 - Media Type Registration for the Society of Motion Picture and Television Engineers (SMPTE) Material Exchange Format (MXF)".
  31. ↑ "Nikon Electronic Format (NEF)". nikonusa.com. Retrieved 2020-09-19.
  32. ↑ "What is an NRW (RAW) file?". nikonimgsupport.com. 2019-04-10. Retrieved 2020-09-19.
  33. ↑ "NES Sound Format - Just Solve the File Format Problem". fileformats.archiveteam.org. Retrieved 2021-03-18.
  34. 1 2 3 4 5 6 7 8 9 10 11 "Open Document Format for Office Applications (OpenDocument) Version 1.3. Part 3: OpenDocument Schema". OASIS Open. 2021-04-27. Retrieved 2021-09-12.
  35. ↑ A. Swartz (September 2004). "application/rdf+xml Media Type Registration (RFC3870)". IETF. p. 2. Archived from the original on 2013-09-17. Retrieved 15 October 2013.
  36. ↑ "OWL Web Ontology Language Reference". w3.org. 2004-02-10.
  37. ↑ "pack200 - JAR Packing tool". oracle.com. Retrieved 2020-09-25.
  38. ↑ "Parity Volume Set Specification 1.0". 2001-10-14. Retrieved 2020-08-28.
  39. ↑ "Parity Volume Set Specification 2.0". 2003-05-11. Retrieved 2020-08-28.
  40. ↑ "PCL 5e Technical Reference Manual Part 1" (PDF). Hewlett-Packard. Retrieved 2017-06-22.
  41. ↑ "PCL 5e Technical Reference Manual Part 2" (PDF). Hewlett-Packard. Retrieved 2017-06-22.
  42. ↑ "What's inside a PDB file?". microsoft.com. 2016-02-08. Retrieved 2020-09-18.
  43. ↑ "File Format Description". wwpdb.org. Retrieved 2020-09-18.
  44. 1 2 "Certificate - What is a Pem file and how does it differ from other OpenSSL Generated Key File Formats?".
  45. ↑ Puppy Linux. "Package management". Archived from the original on 2012-06-23. Retrieved 2013-01-31.
  46. 1 2 3 "Alignment Fileformats". 22 May 2019. Retrieved 22 May 2019.
  47. 1 2 3 "Adobe Type 1 Font Format" (PDF). adobe.com. Archived from the original (PDF) on 2015-09-10. Retrieved 2020-09-21.
  48. ↑ "Standard: Portable Game Notation Specification and Implementation Guide". Internet Archive. 12 March 1994. Retrieved 25 July 2020. The page linking to the document is here.
  49. ↑ "Perl Module Mechanics". std.com. 2007-03-02. Retrieved 2020-09-21.
  50. ↑ "POM Reference". apache.org. Retrieved 2020-09-21.
  51. ↑ "PowerPoint (.pptx) Extensions to the Office Open XML File Format". 2020-02-26. Retrieved 2020-08-28.
  52. ↑ "Protocol Buffers Version 3 Language Specification". developers.google.com. Retrieved 2020-09-21.
  53. ↑ "The Photoshop File Format". adobe.com. Retrieved 2020-09-21.
  54. 1 2 juanpablojofre. "Windows PowerShell Glossary". Retrieved 2017-09-03.
  55. ↑ ".psppalette Extension - List of programs that can open .psppalette files". Retrieved 2017-10-13.
  56. ↑ "Quicken Interchange Format (QIF) files". intuit.com. Archived from the original on 2010-02-22. Retrieved 2020-09-22.
  57. ↑ "About Resource Files". microsoft.com. 2018-05-13. Retrieved 2020-09-19.
  58. ↑ "Supported Remote Desktop RDP file settings". microsoft.com. 2020-09-14. Retrieved 2020-09-19.
  59. ↑ "Serialization Interface For Single Objects". Retrieved 2020-09-21.
  60. ↑ "Resource File Formats". microsoft.com. 2018-05-31. Retrieved 2020-09-19.
  61. ↑ Agarwal, Rahul; Ayars, Jeff; Hefta-Gaub, Brad; Stammen, Dale (1998-03-13). "RealMedia File Format". ietf.org. Retrieved 2020-09-22.
  62. ↑ R Studio (2020). "R Markdown". R Studio. Retrieved 2021-11-16.
  63. ↑ "RealVideo 9 Technical Overview" (PDF). 2003. Archived from the original (PDF) on 2007-06-14. Retrieved 2020-09-22.
  64. ↑ Microsoft Corporation (May 1999). "Rich Text Format (RTF) Specification, version 1.6". Retrieved 2010-03-13.
  65. ↑ Microsoft Corporation (2004-04-20). "Word 2003: Rich Text Format (RTF) Specification, version 1.8". Microsoft. Retrieved 2010-03-13.
  66. ↑ John Siracusa (2005-04-28). "Mac OS X 10.4 Tiger – File types revisited". Retrieved 2010-03-13.
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