List of filename extensions (F–L)

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

Main article: List of filename extensions

F
Ext.DescriptionUsed by
F Archive FREEZE
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
FASTA[2][3][4] FASTA format sequence file
FASTQ[2][3][4] FASTQ format sequence file
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
FITS[8][9] Flexible Image Transport System astronomy software
FLAC[10] Audio codec, Audio file format
FLAME Fractal configuration file Apophysis
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
FODT[12] OpenDocument Flat XML Document LibreOffice
FOR Fortran language source file many
FRAG Fragment File, usually stored on MOVPKG files MOVPKG
FRM[13] MySQL Database Metadata MySQL
FS F# source file F# compilers

G
Ext.DescriptionUsed by
GBR[14] Gerber format PCB CAD/CAM
GBS[15] OtterUI binary scene format. UI library & tool specifically aimed at game developers. OtterUI by Aonyx Software
GDF[16] General Data Format for Biomedical Signals Biomedical signal processing, Brain Computer Interfaces
GDT Gerätedatentransfer, an xDT application Healthcare providers in Germany
GED[17] GEDCOM Genealogy data exchange
GGB GeoGebra File GeoGebra
GIF[18] Compuserves' Graphics Interchange Format (bitmapped graphics) QPeg - Display - CompuShow
GML[19] Geography Markup Language File Geography Markup Language
GO Go source code file Golang
GPX[20][21] GPS eXchange Format
GTF[22] Gene transfer format
GV[23] Graph Visualization Graphviz
GZ gzip compressed data gzip

H
Ext.DescriptionUsed 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[24]
HAR[25] 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
HPP C++ header file Zortech C++ - Watcom C/C++
HTA HTML Application Microsoft Windows
HTM see HTML
HTML[26] Hypertext Markup Language (WWW) Netscape - Mosaic - many
HUM 3D Model database OMSI The Bus Simulator
HXX C++ header file

I
Ext.DescriptionUsed by
ICC[27] ICC profile Color Configuration for color input or output devices
ICE LHA Archive Cracked LHA (old LHA), Total Commander
ICO Icon file ICONEDIT.EXE; Microsoft Windows
IFC[28] 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[29] Flight tracks downloaded from GPS devices in the International Gliding Commission's prescribed format
IGES[30] Initial Graphics Exchange Specification
IMG disk IMaGe
INI[31] Configuration file
IO[32] Archive CPIO
IPA IOS packed application IOS
IPT XnView IPTC template XnView, XnViewMP
ISO ISO-9660 table see: List of ISO image software
IT Impulse Tracker music file Impulse Tracker

J
Ext.DescriptionUsed by
J2C[33] JPEG 2000 image JPEG 2000
JAR[34] Java archive JAR, Java Games and Applications
JAV[35] see JAVA
JAVA[35] Java source code file
JBIG[36][37][38] Joint Bilevel Image Group
JNLP[39] Java Network Launching Protocol Java Web Start
JP2[33] JPEG 2000 image
JPEG[40] Joint Photographic Experts Group graphics file format Minolta/Konica Minolta cameras use this for JPEGs in Adobe RGB color space
JPEG[40] Joint Photographic Experts Group graphics file format QPeg - FullView - Display
JPEG[40] Joint Photographic Group various (Minolta/Konica Minolta cameras use this for JPEGs in sRGB color space)
JS[41] JavaScript file script in HTML pages
JSON[42][43] JSON (JavaScript Object Notation) Ajax
JSP[44] Jakarta Server Pages Dynamic pages running Web servers using Java technology

K
Ext.DescriptionUsed by
KEY Keynote Presentation Keynote
KML[45][46] Keyhole Markup Language Google Earth
KMZ[45][46] Keyhole Markup Language (Zip compressed) Google Earth
KRA Krita image file Krita
KT Kotlin source code Kotlin Programming Language

L
Ext.DescriptionUsed by
LABEL Dymo label file Dymo desktop software
LBR .LBR Archive for CP/M and MS-DOS using the LU program
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
LUA Lua script file Microsoft Visual C++, Notepad++
LVPROJ LabVIEW project file LabVIEW
LY LilyPond Notation File LilyPond
LZ Archive Lzip

See also

Notes

    References
    1. "F4V/FLV Technology Center". Adobe. Retrieved 2020-09-15.
    2. "Alignment Fileformats". 22 May 2019. Retrieved 22 May 2019.
    3. Lipman DJ, Pearson WR (March 1985). "Rapid and sensitive protein similarity searches". Science. 227 (4693): 1435–41. Bibcode:1985Sci...227.1435L. doi:10.1126/science.2983426. PMID 2983426.
    4. Pearson WR, Lipman DJ (April 1988). "Improved tools for biological sequence comparison". Proceedings of the National Academy of Sciences of the United States of America. 85 (8): 2444–8. Bibcode:1988PNAS...85.2444P. doi:10.1073/pnas.85.8.2444. PMC 280013. PMID 3162770.
    5. "FictionBook 2.0 Specification". bribuser.ru. Retrieved 2020-09-13.
    6. "Autodesk FBX Files | 3ds Max | Autodesk Knowledge Network". knowledge.autodesk.com. Retrieved 2018-07-28.
    7. "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.
    8. "Flexible Image Transport System: a new standard file format for long-term preservation projects?" (PDF). Vatican City. 2012-07-05. Retrieved 2013-03-06.
    9. "IAU FITS Working Group". NASA.
    10. Coalson, Josh. "FLAC - format". 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" (PDF). Adobe. November 2008. Retrieved 2020-09-15.
    12. "OASIS Open Document Format for Office Applications (OpenDocument) TC". Retrieved 2020-09-14.
    13. "MySQL .frm File Format". mysql.com. Retrieved 2020-09-13.
    14. "Gerber Format". ucamco.com. 2020-04-09. Retrieved 2020-09-13.
    15. "OtterUI - UI library & tool specifically aimed at game developers". https://github.com/ppiecuch/OtterUI. 2020-12-16. Retrieved 2020-12-16. External link in |website= (help)
    16. Schlögl, Alois (2006). "GDF - A general dataformat for biosignals". arXiv:cs/0608052v10.
    17. "GEDCOM X Specifications". gedcomx.org. Retrieved 2020-09-14.
    18. "Graphics Interchange Format, Version 89a". W3C. 31 July 1990. Retrieved 6 March 2009.
    19. Open Geospatial Consortium Inc. (2010-02-08), Technical Committee Policies and Procedures: MIME Media Types for GML (PDF)
    20. "GPX: the GPS Exchange Format". topografix.com. Retrieved 2020-09-14.
    21. "OpenGIS Geography Markup Language (GML) Encoding Standard". Retrieved 2011-03-25.
    22. "GTF2.2: A Gene Annotation Format". wustl.edu. Retrieved 2020-09-14.
    23. "Graphviz - Graph Visualization Software". graphviz.org. Retrieved 2020-10-20.
    24. "HHVM 4.0.0". HHVM.
    25. "HTTP Archive (HAR) format". W3C Web Performance Working Group. 2012-08-14. Retrieved 2019-05-18.
    26. "HTML Standard". whatwg.org. Retrieved 2020-09-14.
    27. "ICC Specifications". 2020. Retrieved 2020-09-14.
    28. https://www.buildingsmart.org/compliance/software-certification/certified-software/
    29. "IGC Flight Recorder Specification Edition 2 with AL5 2019-10-30". Archived from the original on 2019-05-08. Retrieved 2020-04-30.
    30. 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
    31. Archiveddocs. "Configure an Ini File Item". docs.microsoft.com. Retrieved 2020-12-18.
    32. "Cpio". GNU.org.
    33. JPEG. "Joint Photographic Experts Group, JPEG2000". Retrieved 2009-11-01.
    34. "JAR File Specification". Oracle Corporation. Retrieved 2020-09-14.
    35. Gosling, James; Joy, Bill; Steele, Guy; Bracha, Gilad. "The Java Language Specification, 2nd Edition". Archived from the original on August 5, 2011. Retrieved February 8, 2008.
    36. 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. Retrieved 2009-11-11.
    37. ISO/IEC JTC 1/SC 29. "Programme of Work, (Allocated to SC 29/WG 1)". Archived from the original on 2013-12-31. Retrieved 2009-11-07.
    38. ISO. "JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information". Retrieved 2009-11-11.
    39. "JSR 56: Java Network Launching Protocol and API". Retrieved 2020-09-14.
    40. "T.81 – DIGITAL COMPRESSION AND CODING OF CONTINUOUS-TONE STILL IMAGES – REQUIREMENTS AND GUIDELINES" (PDF). CCITT. September 1992. Retrieved 12 July 2019.
    41. "ECMAScript 2020 Language Specification".
    42. "Standard ECMA-404 - The JSON Data Interchange Syntax" (PDF). Ecma International. December 2017. p. 1, footnote. Retrieved 27 October 2019.
    43. "ISO/IEC 21778:2017". ISO. Retrieved 29 July 2019.
    44. "JSR 245: JavaServer Pages 2.1". jcp.org. 2013-06-12. Retrieved 2020-09-14.
    45. "OGC Approves KML as Open Standard". OpenGeospatial.org. 2008-04-14. Retrieved 2018-11-20.
    46. "KML". OpenGeospatial.org. Retrieved 2018-11-20.
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