List Of Filename Extensions (F–L)

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

F

Ext. Description Used by
F Forth language source code file Forth development systems
F Fortran language source code file (in fixed form) Many Fortran compilers
F01 Fax perfectfax
F03 Fortran language source code file (in free form) Many Fortran compilers
F08 Fortran language source code file (in free form) Fortran compilers
F18 Fortran language source code file (in free form) Fortran compilers
F4 Fortran IV source code file Fortran IV source code
F4V[1] A container format for Flash Video that differs from the older FLV file format (see also SWF) Adobe Flash
F77 Fortran language source code file (in fixed form) Many Fortran compilers
F90 Fortran language source code file (in free form) Many Fortran compilers
F95 Fortran language source code file (in free form) Many Fortran compilers
FA[2][3][4] FASTA format sequence file
FAA[2][3][4] FASTA format amino acid
FACTOR Factor source file
FASTA[2][3][4] FASTA format sequence file
FASTQ[2][3][4] FASTQ format sequence file
FB Forth language block file Forth development systems
FB2[5] FictionBook e-book 2.0 file (DRM-free XML format) e-book readers
FBX [6] 3D model geometry, material textures, lighting, armature, and animation sequences for inter application use/transport Autodesk
FEN[7] Forsyth–Edwards Notation Chess applications -text data describes a specific position.
FF Farbfeld image
FFN[3][4][2] FASTA format nucleotide of gene regions
Fit CurvFit Input file format CurvFit software
FITS[8][9] Flexible Image Transport System astronomy software
FLAC[10] Audio codec, Audio file format
FLAME Fractal configuration file Apophysis
FLP FL Studio project file FL Studio
FLV[11] A container format for Flash Video (see also SWF) Adobe Flash
FNA[2][3][4] FASTA format nucleic acid
FNI FileNet Native Document FileNet
FNX Saved notes with formatting in markup language FeatherNote
FODG[12] OpenDocument Flat XML Drawings and vector graphics OpenDocument, LibreOffice, Collabora Online
FODP[12] OpenDocument Flat XML Presentations OpenDocument, LibreOffice, Collabora Online
FODS[12] OpenDocument Flat XML Spreadsheets OpenDocument, LibreOffice, Collabora Online
FODT[12] OpenDocument Flat XML Text Document OpenDocument, LibreOffice, Collabora Online
FOR Fortran language source file many
FQL[13] Fauna Query Language source file Fauna
Freq Match-n-Freq (TM) Input file format Match-n-Freq software
FRAG Fragment File, usually stored on MOVPKG files MOVPKG
FRM[14] MySQL Database Metadata MySQL
Frq7 Match-n-Freq (TM) version 7+ Input file format Match-n-Freq software
FS F# source file F# compilers
FS Forth language source code file (often used to distinguish from .fb) Forth development systems
FTH Forth language source code file Forth development systems

G

Ext. Description Used by
G4[15] ANTLR4 grammar ANTLR4
GBR[16] Gerber format PCB CAD/CAM
GDF[17] General Data Format for Biomedical Signals Biomedical signal processing, Brain Computer Interfaces
GDT Gerätedatentransfer, an xDT application Healthcare providers in Germany
GED[18] GEDCOM Genealogy data exchange
GGB GeoGebra File GeoGebra
GIF[19] Compuserves' Graphics Interchange Format (bitmapped graphics) QPeg - Display - CompuShow
GM9[20] Scripts for GodMode9 Godmode9
GMI Gemtext markup language[21] Gemini (Protocol)
GMK GameMaker Project File YoYo Games
GML[22] Geography Markup Language File Geography Markup Language
GO Go source code file Go (Programming language)
GREXLI Uncompressed folder as a file WinGrex/GrexliLib
GSF Generic sensor format Used for storing bathymetry data, such as that gathered by a multibeam echosounder.
GPX[23][24] GPS eXchange Format
GRP Data pack files for the Build Engine Duke Nukem 3D
GTF[25] Gene transfer format
GV[26] Graph Visualization Graphviz
GZ gzip compressed data gzip

H

Ext. Description Used by
H! On-line help file Flambeaux Help! Display Engine
H! Pertext database HELP.EXE
H-- C-- language header Sphinx C--
H Header file (usually C language) Watcom C/C++
H++ Header file C++
HA Archive HA
HACK Source file for the programming language hack The HHVM[27]
HAR[28] HTTP Archive format (JSON-format web-browser log) W3C draft standard
HDI Hard Disk Image file (PC-9800 disk image file) PC-9800 emulators
HDMP heap dumpfile
HH C++ header file
HOF Basic Configuration file OMSI The Bus Simulator
HOI4 Hearts Of Iron 4 file Hearts Of Iron 4 Save game
HPP C++ header file Zortech C++ - Watcom C/C++
HTA HTML Application Microsoft Windows
HTM see HTML
HTML[29] Hypertext Markup Language (WWW) Netscape - Mosaic - many
HUM 3D Model database OMSI The Bus Simulator
HXX C++ header file

I

Ext. Description Used by
ICC[30] ICC profile Color Configuration for color input or output devices
ICE LHA Archive Cracked LHA (old LHA), Total Commander
ICL Icon library Microsoft Windows
ICO Icon file ICONEDIT.EXE; Microsoft Windows
IFC[31] Industry Foundation Classes (platform neutral, open file format used by BIM software). It is registered by ISO and is an official International Standard ISO 16739-1:2018. BIM software
IGC[32] Flight tracks downloaded from GPS devices in the International Gliding Commission's prescribed format
IGES[33] Initial Graphics Exchange Specification
IMG Disk image
INFO Texinfo hypertext document Texinfo, info (Unix), Emacs
INI[34] Configuration file
IO[35] Archive CPIO
IPT XnView IPTC template XnView, XnViewMP
IRX "IOP Relocatable eXecutable". Library files to dynamically link application code to the Input/Output Processor on the PS2 to communicate with devices like memory cards, USB devices, etc. Sony PlayStation 2
ISO ISO-9660 table see: List of ISO image software
IT Impulse Tracker music file Impulse Tracker

J

Ext. Description Used by
JL Julia script file Julia (programming language)
J2C[36] JPEG 2000 image JPEG 2000
JAR[37] Java archive JAR, Java Games and Applications
JAV[38] see JAVA
JAVA[38] Java source code file
JBIG[39][40][41] Joint Bilevel Image Group
JNLP[42] Java Network Launching Protocol Java Web Start
JP2[36] JPEG 2000 image
JPE[43] Joint Photographic Experts Group graphics file format Minolta/Konica Minolta cameras use this for JPEGs in Adobe RGB color space
JPEG[43] Joint Photographic Experts Group graphics file format QPeg - FullView - Display
JPG[43] Joint Photographic Group various (Minolta/Konica Minolta cameras use this for JPEGs in sRGB color space)
JS[44] JavaScript file script in HTML pages
JSON[45][46] JSON (JavaScript Object Notation) Ajax
JSP[47] Jakarta Server Pages Dynamic pages running Web servers using Java technology
JXL JPEG XL raster graphics file

K

Ext. Description Used by
KEY Keynote Presentation Keynote
KLC[48] MSKLC Source file Microsoft Keyboard Layout Creator
KML[49][50] Keyhole Markup Language Google Earth
KMZ[49][50] Keyhole Markup Language (Zip compressed) Google Earth
KO Linux kernel module format system file Linux
KRA[51] Krita image file Krita
KSH Kornshell source file Kornshell
KT Kotlin source code file Kotlin Programming Language
KV Kivy

L

Ext. Description Used by
LABEL Dymo label file Dymo desktop software
LBR .LBR Archive for CP/M and MS-DOS using the LU program
LDB .LDB Leveldb data file Google key-value storage library
LDB .LDB MDB Database lock file Microsoft Access Database
LDT Labordatenträger, an xDT application Healthcare providers in Germany
LHA LHA Archive LHA/LHARC, Total Commander
LISP LISP source code file
LL LLVM Assembly Language llvm
LM Language Model File[52] Microsoft Windows
LNK Local file shortcut Microsoft Windows
LOGICX Logic Pro files Logic Pro (MacOS, iPadOS)
LRC Lyrics file Lyrics for karaoke-related system and program
LUA Lua script file Lua (programming language)
LZ Archive Lzip

See also

  • List of filename extensions
  • List of file formats

Notes

References

  1. ↑ "F4V/FLV Technology Center". Adobe. https://www.adobe.com/devnet/f4v.html. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 "Alignment Fileformats". 22 May 2019. http://www.jalview.org/help/html/io/fileformats.html. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "Rapid and sensitive protein similarity searches". Science 227 (4693): 1435–41. March 1985. doi:10.1126/science.2983426. PMID 2983426. Bibcode: 1985Sci...227.1435L.  closed access
  4. ↑ 4.0 4.1 4.2 4.3 4.4 4.5 "Improved tools for biological sequence comparison". Proceedings of the National Academy of Sciences of the United States of America 85 (8): 2444–8. April 1988. doi:10.1073/pnas.85.8.2444. PMID 3162770. Bibcode: 1988PNAS...85.2444P. 
  5. ↑ "FictionBook 2.0 Specification". http://gribuser.ru/xml/fictionbook/index.html.en. 
  6. ↑ "Autodesk FBX Files | 3ds Max | Autodesk Knowledge Network" (in en-US). https://knowledge.autodesk.com/support/3ds-max/learn-explore/caas/CloudHelp/cloudhelp/2017/ENU/3DSMax/files/GUID-26E80277-1645-4C4E-A6B2-44399376490F-htm.html. 
  7. ↑ "Standard: Portable Game Notation Specification and Implementation Guide". 12 March 1994. https://archive.org/download/pgn-standard-1994-03-12/PGN_standard_1994-03-12.txt.  The page linking to the document is here.
  8. ↑ "Flexible Image Transport System: a new standard file format for long-term preservation projects?". Vatican City. 2012-07-05. http://www.vaticanlibrary.va/moduli/Allegrezza_EWASS2012.pdf. Retrieved 2013-03-06. 
  9. ↑ "IAU FITS Working Group". NASA. http://fits.gsfc.nasa.gov/iaufwg/iaufwg.html. 
  10. ↑ Coalson, Josh. "FLAC - format". https://xiph.org/flac/format.html#stream. Retrieved 4 April 2013. ""fLaC", the FLAC stream marker in ASCII, meaning byte 0 of the stream is 0x66, followed by 0x4C 0x61 0x43" 
  11. ↑ "Video File Format Specification Version 10". Adobe. November 2008. https://www.adobe.com/content/dam/acom/en/devnet/flv/video_file_format_spec_v10.pdf. 
  12. ↑ 12.0 12.1 12.2 12.3 "Open Document Format for Office Applications (OpenDocument) Version 1.3. Part 3: OpenDocument Schema". 2021-04-27. https://docs.oasis-open.org/office/OpenDocument/v1.3/os/part3-schema/OpenDocument-v1.3-os-part3-schema.html. 
  13. ↑ "Fauna Query Language". https://docs.fauna.com/fauna/current/api/fql/. 
  14. ↑ "MySQL .frm File Format". https://dev.mysql.com/doc/internals/en/frm-file-format.html. 
  15. ↑ "Collection of Antlr4 grammars". https://github.com/antlr/grammars-v4. 
  16. ↑ "Gerber Format". 2020-04-09. https://www.ucamco.com/en/gerber. 
  17. ↑ Schlögl, Alois (2006). "GDF - A general dataformat for biosignals". arXiv:cs/0608052v10.
  18. ↑ "GEDCOM X Specifications". http://www.gedcomx.org/Specifications.html. 
  19. ↑ "Graphics Interchange Format, Version 89a". W3C. 31 July 1990. http://www.w3.org/Graphics/GIF/spec-gif89a.txt. Retrieved 6 March 2009. 
  20. ↑ Homebrew, Nintendo. "GodMode9 Usage" (in en). https://3ds.hacks.guide/godmode9-usage.html. 
  21. ↑ "Project Gemini". https://gemini.circumlunar.space/docs/specification.gmi. 
  22. ↑ Open Geospatial Consortium Inc. (2010-02-08) (PDF), Technical Committee Policies and Procedures: MIME Media Types for GML, http://portal.opengeospatial.org/files/?artifact_id=37743 
  23. ↑ "GPX: the GPS Exchange Format". https://www.topografix.com/gpx.asp. 
  24. ↑ "OpenGIS Geography Markup Language (GML) Encoding Standard". http://www.opengeospatial.org/standards/gml. Retrieved 2011-03-25. 
  25. ↑ "GTF2.2: A Gene Annotation Format". https://mblab.wustl.edu/GTF22.html. 
  26. ↑ "Graphviz - Graph Visualization Software". http://graphviz.org/. 
  27. ↑ "HHVM 4.0.0". http://hhvm.com/blog/2019/02/11/hhvm-4.0.0.html. 
  28. ↑ "HTTP Archive (HAR) format". W3C Web Performance Working Group. 2012-08-14. https://w3c.github.io/web-performance/specs/HAR/Overview.html. Retrieved 2019-05-18. 
  29. ↑ "HTML Standard". https://html.spec.whatwg.org/multipage/. 
  30. ↑ "ICC Specifications". 2020. https://www.color.org/icc_specs2.xalter. 
  31. ↑ "Certified Software". 23 June 2022. https://www.buildingsmart.org/compliance/software-certification/certified-software/. 
  32. ↑ "IGC Flight Recorder Specification Edition 2 with AL5 2019-10-30". 3 August 2017. https://www.fai.org/page/igc-approved-flight-recorders. 
  33. ↑ Initial Graphics Exchange Specification IGES Version 1.0, Roger N. Nagel, Ph.D., Project Manager Walt W. Braithwaite, M.S., Boeing Philip R Kennicott, Ph.D., General Electric, National Bureau of Standards, NBSIR 80-1978, March 1980
  34. ↑ Archiveddocs (22 February 2013). "Configure an Ini File Item" (in en-us). https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-r2-and-2008/cc731332(v=ws.11). 
  35. ↑ "Cpio". GNU.org.
  36. ↑ 36.0 36.1 JPEG. "Joint Photographic Experts Group, JPEG2000". http://www.jpeg.org/jpeg2000/index.html. 
  37. ↑ "JAR File Specification". Oracle Corporation. https://docs.oracle.com/javase/8/docs/technotes/guides/jar/jar.html. 
  38. ↑ 38.0 38.1 "The Java Language Specification, 2nd Edition". https://java.sun.com/docs/books/jls/second_edition/html/intro.doc.html#237601. 
  39. ↑ ISO/IEC JTC 1/SC 29 (2009-05-07). "ISO/IEC JTC 1/SC 29/WG 1 - Coding of Still Pictures (SC 29/WG 1 Structure)". Archived from the original on 2013-12-31. https://web.archive.org/web/20131231055215/http://kikaku.itscj.ipsj.or.jp/sc29/29w12901.htm. Retrieved 2009-11-11. 
  40. ↑ ISO/IEC JTC 1/SC 29. "Programme of Work, (Allocated to SC 29/WG 1)". Archived from the original on 2013-12-31. https://web.archive.org/web/20131231012300/http://kikaku.itscj.ipsj.or.jp/sc29/29w42901.htm. Retrieved 2009-11-07. 
  41. ↑ ISO. "JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information". http://www.iso.org/iso/standards_development/technical_committees/list_of_iso_technical_committees/iso_technical_committee.htm?commid=45316. Retrieved 2009-11-11. 
  42. ↑ "JSR 56: Java Network Launching Protocol and API". https://www.jcp.org/en/jsr/detail?id=56. 
  43. ↑ 43.0 43.1 43.2 "T.81 – DIGITAL COMPRESSION AND CODING OF CONTINUOUS-TONE STILL IMAGES – REQUIREMENTS AND GUIDELINES". CCITT. September 1992. https://www.w3.org/Graphics/JPEG/itu-t81.pdf. Retrieved 12 July 2019. 
  44. ↑ "ECMAScript 2020 Language Specification". https://tc39.es/ecma262/#sec-overview. 
  45. ↑ "Standard ECMA-404 - The JSON Data Interchange Syntax". Ecma International. December 2017. p. 1, footnote. https://www.ecma-international.org/publications/files/ECMA-ST/ECMA-404.pdf. Retrieved 27 October 2019. 
  46. ↑ "ISO/IEC 21778:2017". http://www.iso.org/cms/render/live/en/sites/isoorg/contents/data/standard/07/16/71616.html. 
  47. ↑ "JSR 245: JavaServer Pages 2.1". 2013-06-12. https://jcp.org/en/jsr/detail?id=245. 
  48. ↑ "MSKLC Guide". 26 April 2023. https://msklc-guide.github.io/. 
  49. ↑ 49.0 49.1 "OGC Approves KML as Open Standard". 2008-04-14. http://www.opengeospatial.org/pressroom/pressreleases/857. Retrieved 2018-11-20. 
  50. ↑ 50.0 50.1 "KML". http://www.opengeospatial.org/standards/kml. Retrieved 2018-11-20. 
  51. ↑ "Krita Features". https://krita.org/en/item/krita-features/. Retrieved 2022-01-16. 
  52. ↑ "LM file - What is an LM file and how do I open it?". https://fileinfo.com/extension/lm. 

External links

  • File Extension Resource
  • The File Extensions Resource
  • File information site
  • File Extension Database
  • File format finder
  • List of file types



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