Alphabetical list of filename extensions (F–L)

This alphabetical list of filename extensions contains standard extensions associated with computer files.

Contents 

A–E

F

Ext. Description Used by
F
 Archive FREEZE
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
F2R
 Farandole Linear Module Farandole
F3R
 Farandole Blocked Linear Module Farandole
F4
 Fortran IV source code file
F4A
 Flash Video F4V with only audio (see also SWF) Adobe Flash
F4B
 Flash Video F4V audiobook (see also SWF) Adobe Flash
F4P
 Flash Video F4V with digital rights management (see also SWF) Adobe Flash
F4V
 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
F96
 Fax Frecom FAX96
FAC
 see FACE
FACE
 Usenix FACE graphics file
FAL
 Falcon script source Falcon
FAM
 Famtasia Famicom image format Famtasia
FAQ
 Frequently Asked Questions text file
FAR
 Music format (Farandole Composer Module) Farandole
FAS
 Macsyma compiled program
FAX
 Fax (raster graphics in CCITT format) most Fax programs
FB
 Backup files Fifth Generation Systems FastBack Plus
FBM
 Fuzzy Bitmap
FBW
 HP Backup and Recovery Manager HP Backup
FC
 Spell checking dictionary Harvard Graphics 2.0
FCM
 Binary file patch file (forward compression) jlpak10.zip
FCP
 Final Cut Pro project file Final Cut Pro
FD
 Declaration file Microsoft Fortran
FD
 Field offsets for compiler DataFlex
FD
 Front Door' resource files FD
FDB
 Font Definition Block Ming library
FDS
 fwNES Famicom Disk System image fwNES
FDS
 Headerless Famicom Disk System image
FDW
 Form F3 Design and Mapping
FDX
 Screenplay Final Draft
FE
 Data Surface Evolver 3D surface
FEB
 Button bar for Figure Editor WordPerfect for Win
FEI
 Fatal Error Infotable Geoworks
FES
 File produced when a fileless occurrence in 3D Topicscape is exported to Windows 3D Topicscape
FF
 Intelligont FIAS format
FF
 Outline font description Agfa Compugraphics
FFE
 Front Fareast Famicom image format
FFF
 Fax defFax
FFI
 Atech FastFont (AllType)
FFIVW
 File Format for the Interchange of Virtual Worlds
FFT
 Dca/FFT Final Form Text text file (DisplayWrite)
FFT
 DCA/FFT Final Form Text text file DisplayWrite
FH3
 Vector graphics Aldus FreeHand 3.x
FH4
 Vector graphics Aldus FreeHand 3.x
FI
 Interface file Microsoft Fortran
FIF
 Fractal Image Format file
FIG
 Figure File MATLAB
FIL
 Table Data Audit Command Language (ACL)
FIL
 File template Application Generator
FIL
 Filelist
FIL
 Files list object file dBASE Application Generator
FIL
 Mirror. FIL is the name given to the saved FAT by the mirror program included in some versions of DOS and in PCTools MS-DOS -
FIL
 Overlay WordPerfect
FIL
 File which was moved to the Virus Vault by AVG
FILE
 A generic Windows file
FILM
 Filmkey film file Filmkey Player
FIN
 Print-formatted text file Perfect Writer - Scribble - MINCE
FIO
 Aldus PhotoStyler graphics filter
FIO
 Image PALS viewer DLL
FIT
 File Index Table WindowsNT
FIT
 see FITS
FIT
 Fityk Script Fityk
FITS
 Flexible Image Transport System astronomy software
FIX
 Patch file
FKY
 Macro file FoxPro
FLA
 Source material for Flash applications (see SWF) Adobe Flash
Audio codec, Audio file format
FLAME
 Fractal configuration file Apophysis
FLB
 Format library Papyrus
FLC
 Animation format FLIC >320x200 AAPlay - Autodesk AniPro
FLD
 Folder Charisma
FLI
 Animation format FLIC 320x200 Autodesk Animator
FLI
 TeX font library EmTeX
FLM
 Film Roll AutoCAD/AutoShade
FLP
 Flstudio project file Fruity Loops (FlStudio)
FLP
 FLP Designer layout file FLP Designer
FLT
 Data/file conversion filter (or overlay) Alsud, Microsoft Word
FLT
 Filter file Micrografx Picture Publisher
FLT
 MultiGen Flight
FLT
 Support file - graphics filter Asymetrix ToolBook
FLX
 Animation format
FLX
 Compiled binary DataFlex
FLV
 A container format for Flash Video (see also SWF) Adobe Flash
FM
 Database FileMaker Pro
FM1
 Spreadsheet format overlay Lotus 1-2-3 release 2.x
FM3
 Device driver Harvard Graphics 3.0
FM3
 Spreadsheet Lotus 1-2-3 release 3.x
FMB
 File Manager Button bar WordPerfect for Win
FMF
 Font or icon file IBM LinkWay
FMK
 Makefile Fortran PowerStation
FMO
 Compiled format file dBASE IV
FMT
 Format file dBASE IV - FoxPro - Clipper 5 - dBFast
FMT
 Gate3 format file
FMT
 Style sheet Sprint
FMV
 Full Motion Video file
FN3
 Font file Harvard Graphics 3.0
FND
 Files searching properties Win95
FNI
 FileNet Native Document FileNet
FNK
 FunkTracker music module AWAVE, FunkTracker
FNM
 Fannie Mae Residential Loan Data (RLD) format for mortgage submission to DO/DU Desktop Originator
Fnn
 DOS screen text font - height nn pixels fntcol13.zip
FNT
 Font file many
FNX
 Inactive font Exact
FO1
 Font file Borland Turbo C
FO2
 Font file Borland Turbo C
FOG
 Fontographer Database File Fontographer3.5
FOL
 Folder of saved messages 1st Reader
FON
 Log of all calls Procomm Plus
FON
 Terminate phonebook Terminate - Terminator - Telix
FON
 Windows bitmapped font file Win
FONT
 Font data unix
FOP
 Freedom of the Press graphic file
FOR
 Form WindowBase
FOR
 Fortran language source file many
FOT
 Installed Truetype font Windows Font Installer
FOX
 Foxbase executable (precompiled .prg) FoxBase
FP
 Final Page file FoxPro for DOS
FP
 Tiff file TIFF/IT P1
FP
 Video file DVICO/TVIX MPEG1 video file
FP3
 Database FileMaker Pro
FP4
 Database FileMaker Pro
FP5
 Database FileMaker Pro
FP7
 Database FileMaker Pro
FPC
 Catalog FoxPro
FPD
 TMT Pascal compiled unit TMT Pascal
FPM
 Configuration file FoxPro for MacIntosh
FPT
 Foxpro memo field tables FoxPro
FPU
 Configuration file FoxPro for Unix
FPW
 Floorplan drawing FloorPLAN plus for Windows
FPW
 Configuration file Visual FoxPro
FPX
 FlashPix Bitmap Image File FlashPix
FR?
 Packed mail FTN software
FR3
 Renamed dBASE III+ form file dBASE IV
FRF
 FontMonger Database file FontMonger
FRG
 Uncompiled report file dBASE IV
FRL
 GP-Forth library GP-Forth
FRM
 Registration or other form
FRM
 Report file dBASE IV - Clipper 5 - dBFast
FRM
 Visual Basic Form Visual Basic
FRO
 Compiled report file dBASE IV
FRP
 Form PerForm PRO Plus - FormFlow
FRS
 Screen Font Resource WordPerfect for Win
FRT
 Additional (FPT) report description file FoxPro
FRT
 GP-Forth source file GP-Forth
FRX
 Main (DBF) report description file Visual FoxPro
FRX
 Visual Basic binary program file Visual Basic
FSA
 Applied Biosystems Genetic Analysis data file GeneScan
FSIM
 Simulation File Format Loudsoft
FSL
 Form Paradox for Windows
FSM
 Farandole Composer WaveSample Farandole
FSPROJ
 Habanero Firestarter project Habanero Firestarter
FST
 Linkable program dBFast
FST
 Temporal database file GTKWave data file
FSTICK
 Temporal database file Flash Joystick
FSX
 Data Lotus 1-2-3
FTD
 Falcon dynamic template Falcon
FTM
 Font file Micrografx
FTXT
 text Cloanto text document
FTP
 Configuration FTP Software PC/TCP
FUK
 Map File Postal 2
FW
 Database FrameWork
FW2
 Database Framework II
FW3
 Database Framework III
FWEB
 Fortran WEB
FX
 On-line guide FastLynx
FXD
 Phonebook FAXit
FXP
 Foxpro executable (precompiled .prg) Visual FoxPro
FXS
 FAX Transmit Format graphics file WinFax
FYF
 FileLoc FyTek, Inc.

G

Ext. Description Used by
G
 Data chart APPLAUSE
G16
 GoldED for DOS compiled config GOLDED.EXE
G3D
 Glest model file G3D viewer
G3P
 data Grand Prix 3 car physics Grand Pix 3
G8
 Raw graphics file (one byte per pixel) plane three PicLab - Cubicomb Picturemaker
GAF
 Globa Game Engine audio format Globa Game Engine
GAM
 Fax GammaFax
GAMEPROJ
 Gamesalad game project format GameSalad
GB
 Game Boy ROM Nintendo
GB1
 Game Maker backup file (can also be GB2, GB3, etc.)
GBA
 Game Boy Advance ROM Nintendo
GBC
 Game Boy Color ROM Nintendo
GBL
 Genesis Bitmap Layout Genesis Bitmap
GBL
 Global definitions VAXTPU editor
GBL
 Global module in Basic programs Basic
GBP
 Genesis Bitmap Pattern Genesis Bitmap
GBS
 GBS meta data Generic Build Support (GBS)
GBR
 Gerber format PCB CAD/CAM
GBR
 GIMP brush
GC
 Savegame Star Wars: Battlefront II Galactic Conquest save file
GC1
 Lisp source code Golden Common Lisp 1.1
GC3
 Lisp source code Golden Common Lisp 1.3
GCA
 IBM GOCA GCGW
GCD
 Graphics ROBLOX
GCD
 General content descriptor Wireless devices
GCD
 Generic Cadd drawing Generic Cadd, Visual Cadd
GCF
 Game cache file Steam content delivery system
GCH
 GNU preprocessed C++ header file GNU C++ compiler
GCI
 Nintendo GameCube save file Nintendo GameCube
GCX
 Graph file Mac OS X Grapher
GD3
 Game Doctor Super NES ROM image
GDF
 General Data Format for Biomedical Signals Biomedical signal processing, Brain Computer Interfaces
GDF
 Dictionary file GEOS
GDF
 Geographical Data Format Various mapping software
GDF
 IBM Graphics Data Format Legacy IBM systems
GDL
 Data ArchiCAD model
GDS
 McDonnell-Douglas Things
GDT
 Gerätedatentransfer, an xDT application Healthcare providers in Germany
GE
 GEcho config file GEcho
GED
 GEDCOM Genealogy data exchange
GED
 Native format for all A&L products since 1983 Arts & Letters
GED
 GoldED for DOS compiled config file GOLDED.EXE
GED
 Graphics editor file EnerGraphics
GED
 Game Editor Data / project file Game Editor
GEM
 Vector graphics file GEM - Ventura Publisher
GEN
 Compiled template dBASE Application Generator
GEN
 Generated text Ventura Publisher
GEO
 Geode Geoworks
GEO
 GEOS specific file (application) GEOS
GEO
 GoldED for OS/2 compiled config file GED2.EXE
GEX
 GEcho config file GEcho
GFB
 Compressed GIF image created by GIFBLAST gifblast.exe
GFO
 SGI Radiosity
GFT
 Font NeoPaint
GFT
 GEM-translator font file
GFX
 Instant Artist graphics Files Instant Artist
GFX
 PCBoard @X-coded colorful text GFX2COM - GFX2EXE
GHO
 Norton Ghost File (first file) Symantec
GHS
 Norton Ghost File (split file) Symantec
GHW
 GHDL Wave file GHDL/GTKWave data file
GIB
 Chart Graph-in-the-Box
GIB
 GIMP animated brush
GID
 Help index windows 95 help
Compuserves' Graphics Interchange Format (bitmapped graphics) QPeg - Display - CompuShow
GIW
 Presentation Graph-in-the-Box for Windows
GKH
 Ensoniq Disk Image (VFX, SD, EPS, ASR, TS) Ensoniq
GKS
 Graphics Kernel System
GL
 Animation format grasprt.exe, PV
GL
 Animation GRASP GRAphical System for Presentation
GLB
 Global module in Basic programs
GLM
 Datafile, KernelCAD model Glim, KernelCAD
GLO
 Global module in Basic programs
GLS
 Datafile Across
GLY
 Winword Glossary Microsoft Word
GM6
 GameMaker Editable file as of version 6.x Game Maker
GM81
 GameMaker Editable file as of version 8.1.x Game Maker
GMD
 GameMaker Editable file up to version 5.x Game Maker
GMF
 CGM graphics file APPLAUSE
GMK
 GameMaker Editable file as of version 7.x or 8.x Game Maker
GML
 GameMaker GML script file Game Maker
GML
 Geography Markup Language File Geography Markup Language
GMOD
 Data Golgotha 3D model
GMP
 Geomorph tile map SPX
GMS
 Ghost Mouse Script
GMS
 Gesture and Motion File Formats
GMT
 Gene Matrix Transposed
GMT
 data RFactor car physics
GMX
 GameMaker:Studio Editable File as of 1.x Game Maker
GOC
 Goc source code file Geoworks
GOE
 GOES graphic file
GOH
 Goc header file Geoworks
GP5
 Guitar Pro 5 song Guitar Pro 5
GP
 Geode parameter file Geoworks Glue
GP4
 data Grand Prix 4 car physics
GPH
 Graph Lotus 1-2-3/G
GPK
 Omnigo program package
GPX
 GPS eXchange Format
GR2
 Screen driver Windows 3.x
GRA
 Datafile SigmaPlot
GrADS
 Metafile
GRAFFLE
 OmniGraffle graph file
GRASP
 Graphical System for Presentation
GRB
 T-FLEX CAD file Top Systems
GRB
 MS-DOS Shell Monitor file MS-DOS 5
GRD
 Drivers for GRX (graphics library) GRX (c) Free Soft. Found.
GRDNT
 Image format used in the core of some very obscure customized operating systems to represent gradients; see also SCTOR
GRE
 data Grenoble Thermal ellipsoids Plot Program
GRF
 Graph file Graph Plus, DPlot, and Charisma
GRFT
 Graph definition text file SELDM Postprocessor
GRIB
 Gridded Binary
GRN
 Drivers for GRX (graphics library) GRX (c) Free Soft. Found.
GRP
 Group file Windows 3.x - Papyrus
GRP
 Pictures group PixBase
GRY
 Graphics format (RAW GREYz)
GS
 Script written in Google Apps Script, used for automating tasks across online Google products Google Apps Script
GS1
 Presentation GraphShow
GS3
 data GameStarter
GSA
 data Microsoft Office Groove Space Archive
GSD
 Vector graphics Professional Draw
GSM
 Raw GSM 6.10 audio stream AWAVE
GSP
 Geometer's Sketchpad
GSW
 Worksheet GraphShow
GTA
 data Microsoft Office Groove Tool Archive
GUP
 PopMail
GV
 GrandView outline file
GVO
 Data GFXFX Vector Object
GWI
 Groupwise File Local saved Email
GXL
 Graphics library Genus
GXK
 Secure Data encryption Format Galaxkey
Archive GNU zip - WinZipNT
GZR
 data GunZ action replay

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
HAL
 Data file Hyper Access Lite OS/2
HAM
 Disk Drivers NPA Novell NetWare
HAM
 Hold And Modify Deluxe Paint image file
HAP
 Archive HAP3
HBC
 Compressed Archive File (Shrink Algorithm) Hyperbac
HBC
 Compressed Archive File (Shrink Fast Algorithm) Hyperbac
HBE
 Compressed, Encrypted Archive File (Shrink & AES256-bit Encryption) Hyperbac
HBK
 MathCAD handbook MathCAD
HC
 Header file
HCG
 Document HCLab
HCGS
 Document HCLab
HDD
 data disk image
HDD
 HotDisc Designer label
HDF
 Amiga Hard Disk Image
HDF
 Help file Help Development Kit
HDF
 Hierarchical Data File graphics file SDSC Image Tools
HDL
 Alternate download file listing Procomm Plus
HDMP
 heap dumpfile
HDR
 Datafile Egret
HDR
 Message header text Procomm Plus - 1st Reader
HDR
 PC-File+ Database header
HDR
 SPOT image file
HDS
 Hierarchical Data System
HDW
 Vector graphics Harvard Draw
HDX
 Help index AutoCAD - Zortech C++
HDZ
 Amiga Zip compressed Hard Disk Image
HEP
 Novell Help Librarian Data File Novell NetWare
HEX
 Hex dump
HFI
 HP Font Info file GEM
HGL
 Highlight groups definitions DN
HGL
 HP Graphics Language graphics file
HH
 C++ header file
HHH
 Precompiled header file Power C
HHP
 Help information for remote users Procomm Plus
HI
 Game high scores table
HIN
 Molecule HyperChem
HIS
 History of executing/viewing/editing DN
HIS
 Yard Information File FYM
HKM
 Stores sound in a bitmapped graphics file
HLB
 Help library VAX
HLP
 Help file WinHelp, Help Explorer Viewer
HLX
 Multi Edit help file MultiEdit 5.0
HLZ
 Multi Edit packed help file MultiEdit
HMI
 Music format (MIDI)
HMM
 Alternate Mail Read option menu Procomm Plus
HMP
 Music format (MIDI)
HMP
 Hump Setup File - Obsolete as of version 2.4 (See SET and SWT files) FYM
HNC
 CNC program files Heidenhain (?) dialog
HOF
 Hall Of Fame (game scores)
HOM
 CAD Software Data File PLXHOME
HP
 Printout file for HP printers/plotters (HP/GL)
HP8
 ASCII text HP Roman8 character set NewWave Write
HPF
 HP LaserJet fonts PageMaker
HPG
 see HPGL
HPGL
 Plotter file vector graphics (Hewlett-Packard Graphics Language) AutoCad - Harvard Graphics
HPI
 Font information file GEM
HPJ
 Help project Microsoft Help Compiler for Windows - HC.EXE
HPK
 Archive HPACK
HPM
 Alternate Main menu for privileged users Procomm Plus
HPM
 EMM text HP NewWave
HPM
 High Performance Map Quaestor 1.x
HPP
 C++ header file Zortech C++ - Watcom C/C++
HPPCL
 Hewlett-Packard Printer Control Language
HQX
 Archive (ASCII Mac) BINHEX
HRF
 Graphics file (Hitachi Raster Format)
HRM
 Alternate Main menu for limited/normal users Procomm Plus
HRZ
 Graphics format SSTV
HS2
 Monochrome image Postering
HSC
 2-op FM music HSC tracker - hscplay.exe
HSH
 Disk image hash file DriveSnapshot
HSI
 Handmade Software Inc. graphics file almost JPEG Image Alchemy
HST
 History file Procomm Plus
HTM
 see HTML
Hypertext Markup Language (WWW) Netscape - Mosaic - many
HTX
 Hypertext file
HUS
 Husqvarna Viking Embroidery Format Embroidermodder
HVE
 Hive file[1] Microsoft
HWA
 Hollywood applet Hollywood
HWD
 Presentation Hollywood Designer
HWP
 Hangul Word Processor Document Hangul (word processor)
HWS
 Hollywood script Hollywood
HXM
 Alternate Protocol Selection menu for all users Procomm Plus
HXS
 Microsoft Help 2 compiled help file Microsoft Windows, Help Explorer Viewer
HXX
 C++ header file
HY1
 Hyphenation algorithms Ventura Publisher
HY2
 Hyphenation algorithms Ventura Publisher
HYC
 Data WordPerfect
HYD
 Hyphenation dictionary WordPerfect for Win
HYP
 Archive HYPER

I

Ext. Description Used by
I
 Preprocessor output file Borland C Preprocessor
I
 SWIG interface file SWIG
IAK
 Internet Access Kit OS/2
IAM
 Assembly file Autodesk Inventor
IAX
 Bitmap graphics (IBM Image Access eXecutive)
IAX
 data InstallAnywhere.NET project
IBG
 PDS graphic file
IBM
 Archive (Internal IBM only) ARCHDOS
IBRO
 Robot save file Incredibots 2
ICA
 Bitmap graphics (Image Object Content Architecture)
ICB
 Bitmap graphics
ICC
 ICC configuration
ICE
 Archive Cracked LHA (old LHA)
ICFE
 IceFormula Equation Workspace Penguin George
ICFM
 IceFormula Math Workspace Penguin George
ICM
 ICC configuration
ICN
 ICON source code file
ICO
 Icon file ICONEDIT.EXE; Microsoft Windows
ID
 Disk identification file
IDB
 IDA database IDA
IDB
 VC++ Minimum Rebuild Dependency File Visual C++
IDC
 IDA C language source IDA
IDE
 Borland C++ 4.x IDE project BCW.EXE
IDF
 MIDI instrument description
IDS
 IDA imported names format IDA
IDW
 Vector graphics IntelliDraw
IDW
 Drawing file Autodesk Inventor
IDX
 Index many - FoxPro; also unrelated Quicken file format
IFD
 Form JetForm Design
IFF
 Interchange Format File (IFF) EA Software - Convert (C) Villena - Amiga
IFF
 Sun TAAC Image File Format SDSC Image Tool
IFP
 Script KnowledgeMan
IFS
 Fractal image compressed file Yuvpak
IFS
 Iterated fractal system file IFS Creation Kit, Apophysis
IFS
 Installable file system OS/2
IGES
 Initial Graphics Exchange Specification
IGF
 Inset Systems GCGW
IGC
 Flight tracks downloaded from GPS devices in the International Gliding Commission's prescribed format
IHP
 Watcom help file whelp.exe
IHS
 Inbound History Bink/+
IIW
 Power Point Image Importer Wizard
IL
 hDC Designer Icon Lin dll format
ILB
 Data Scream Tracker
ILG
 data LaTeX Index Generation log
ILK
 Outline of program's format Microsoft ILink incremental linker
IM
 Auran Jet indexed mesh file Trainz
IM8
 Sun Raster graphics file
IMA
 Mirage vector graphics EGO - Chart - Autumn
IMA
 Disk image WinImage
IMG
 ADEX graphic file
IMG
 Disk Image NC 5.0
IMG
 GEM bitmapped graphics file Ventura
IMG
 Image for Windows/Image for DOS Disk image TeraByte, Inc. dba TeraByte Unlimited
IMG
 Vivid IMG file
IMI
 image Magellan Meridian map
IMI
 image Magellan eXplorist map
IMP
 Spreadsheet Lotus Improv
IMQ
 Image presentation ImageQ
IMZ
 Disk image WinImage
IN
 Design II for Windows INput file
IN
 autoconf INput file
IN$
 Installation file HP NewWave
IN3
 Input device driver Harvard Graphics 3.0
INB
 Test script Vermont HighTest
INC
 Include file several programming languages
IND
 Data Index dBASE IV
INDD
 InDesign Document Adobe InDesign
INF
 Information text file (ASCII)
INF
 Install script
INF
 OS/2 hypertext help system file VIEW.EXE
INF
 Type 1 LaserJet font information file soft font installers
INFO
 GNU info reader (output from Texinfo) info (Unix)
INFO
 Icon Data (Amiga)
INGR
 Intergraph Raster File Format
Initialization file
INK
 Pantone reference fills file CorelDRAW
INS
 Data WordPerfect
INS
 Ensoniq Instrument File Ensoniq
INS
 Installation script 1st Reader
INS
 Instrument music file (Adlib)
INT
 Borland Interface Units
INT
 Program saved in Internal (semi-compiled) format Signature
INT
 Source of Borland interface module
INX
 Index Foxbase
IO
 Archive CPIO
IOB
 3d graphics database in TDDD format Imagine
IOC
 Organizational chart Instant ORGcharting!
ION
 4DOS DESCRIPT.ION file (file descriptions like long filenames, comments, or extended attributes) 4DOS, NDOS, 4OS2, 4NT, TC, TCC, VC, DN, ODN, NDN, Windows Commander, Total Commander, XnView, ACDSee, Newsbin Pro, V, as well as some CUI_LIB-based applications
IP
 Immortal Player file Immortal Player
IPA
 Apple iOS Application iPhone, iPod touch, iPad
IPC
 Intellitec Program Configuration - used to configure vehicle electronics Intellitec
IPF
 Interchangeable Preservation Format SoftPres
IPG
 iPod game file iTunes and iPod
IPH
 Hi-Res Image InterPaint
IPL
 Pantone Spot reference palette file CorelDRAW
IPN
 Intecplan project Intecplan Business Plan Software
IPS
 IPS Patching Format (International Patching System) Rom hacking community
IPSW
 iOS firmware file iPhone, iPod touch, iPad, Apple TV
IPT
 Part file Autodesk Inventor
IPT
 MultiColor Image InterPaint
IRRMESH
 static irrMesh files
IRS
 Resource (WordPerfect) standard.irs WordPerfect
IRT
 Data IRIT 3D model
IRTR
 Graphicon-2000 Interactive Real-Time PHIGS
ISD
 Spelling Checker dictionary RapidFile
ISH
 Archive ISH
ISMA
 Output Video file Islam Abusa'a Software
ISO
 ISO-9660 table see: List of ISO image software
IST
 Digitrakker Instrument File AWAVE
IT
 Impulse Tracker music file Impulse Tracker
IT
 Settings intalk
ITF
 Technical indicator, trading system or market scan source code file ProRealTime
ITF
 Interface file JPI TopSpeed Pascal
ITL
 iTunes music library
ITN
 Itinerary file TomTom PNDs
ITT
 IconTweaker Theme
IV
 SGI Inventor
IV-VRML
 Inventor VRML Format
IVE
 OpenSceneGraph 3D model
IVI
 Image file ImmerVision
IVL
 Lensflare file ImmerVision
IVP
 Panorama file ImmerVision
IVU
 User Interface file ImmerVision
IW
 Presentation flowchart IconAuthor - HSC InterActive
IWA
 Text file IBM Writing Assistant
IWB
 Information WorkBench Prodeo
IWD
 Call of Duty Map - Game Data Archive Activision, Inc.
IWP
 Text file Wang
IX
 data dtSearch index
IZT
 Izl binary token file IZL

J

Ext. Description Used by
J2C
 JPEG 2000 image
JAM
 Jam messagebase FTN software
Jam music score Jam
JAR
 Java archive JAR, Java Games and Applications
JAS
 see JASC
JASC
 Graphics format (JASC)
JAV
 see JAVA
JAVA
 Java source code file
JBD
 Datafile SigmaScan
JBIG
 Joint Bilevel Image Group
JBX
 Project file Project Scheduler 4
JCN
 JobClock.Net Synch File
JEF
 Janome Embroidery Format Embroidermodder
JET
 Fax Hybrid JetFax
JFF
 see JFIF
JFIF
 JPEG File Interchange Format
JIF
 see JFIF
JMS
 Music format (JMusic file) UltraForce
JNLP
 Java Network Launching Protocol Java Web Start
JOB
 Gravostyle engraving pattern file Gravostyle/Gravograph
JOB
 QUEUE output file RT-11
JOR
 Journal file SQL
JOU
 Journal backup VAX Edt editor
JP2
 JPEG 2000 image
JPC
 Graphics Japan PIC
Joint Photographic Experts Group graphics file format QPeg - FullView - Display
JPG
 see JPEG
JPS
 backup of startup files (AUTOEXEC.BAT, CONFIG.SYS, 4DOS.INI) by installation of 4DOS (JP Software) 4DOS
JRE
 Java Runtime Environment Java
JRN
 JMP journal JMP
JS
 JavaScript file script in HTML pages
JSON (JavaScript Object Notation) Ajax
JSONLD
 JSON-LD, a JSON-based Serialization for Linked Data
JSP
 JavaServer Pages Dynamic pages running Web servers using Java technology
JTF
 Fax Hayes JT Fax
JTF
 Graphics (TIFF file with JPEG compression)
JVX
 Data JavaView object
JW
 Text document JustWrite
JWL
 Library JustWrite
JZZ
 Spreadsheet Jazz

K

Ext. Description Used by
K2A
 Data Prince of Persia 3D object
K3D
 Description of macro language 3DS 3DS
KAP
 Map Info Sea Chart
KAR
 Music format (Karaoke) ITune 1000.Corp
KAR
 Precompiled .prg for KARAT Rus. FOX+ 2.0
KB
 Keyboard script Borland C++ 4.5
KB
 Program source Knowledge Pro
KB
 K-Brief in XML format TCC's Set-Based Thinking™ Tools
KBA
 K-Brief Attachment TCC's Set-Based Thinking™ Tools
KBASIC
 Source KBasic
KBD
 Keyboard mapping LocoScript - Signature - Procomm Plus
KBM
 Keyboard mapping Reflection 4.0
KBS
 K-Brief in Encrypted format TCC's Set-Based Thinking™ Tools
KBZ
 K-Brief in Compressed format TCC's Set-Based Thinking™ Tools
KCL
 Lisp source code Kyoto Common Lisp
KD
 Koara Document Koara
KDB
 KeePass 1.x database file KeePass
KDBX
 KeePass 2.x database file KeePass
KDC
 Kodak Digital Camera (graphics) PhotoEnhancer by PictureWorks
KEP
 (unknown) (unknown)
KEX
 Kedit Macro File Kedit
KEY
 Datafile Forecast Pro
KEY
 Keynote presentation file Keynote (Apple iWork '08)
KEY
 Keyboard macros
KEY
 OS/2 archive .key-file (i.e. OS2.KEY) OS/2
KEY
 Security file e.g. Shareware Registration info
KEY
 Keynote iOS devices, Macintosh
KFN
 complex music format|[2] Karafun Karaoke(R)
KFX
 Kofax Group GCGW
KIT
 Power Chords drum kit file Power Chord
KMC
 KatzReview's MegaCrammer
KML
 Kedit Macro Library
Keyhole Markup Language		 Kedit
Google Earth
KMY
 data KMyMoney
KMZ
 Keyhole Markup Language (Zip compressed) Google Earth
Knn
 Database key file Clarion
KNO
 Personal Knowbase data file Personal Knowbase
KO
 linux kernel object file linux kernel
KPL
 source code Phrogram
KPP
 Toolpad SmartPad
KPS
 IBM KIPS bitmap graphics
KR1
 Kurzweil 2000 sample file AWAVE
KR2
 Kurzweil 2000 sample file AWAVE
KRZ
 Kurzweil K2000 File Kurzweil
KS
 Source code KonsolScript Document
KS3
 Data 3D Forgastest Editor object
KSM
 Pfaff Embroidery Format Embroidermodder
KTU
 Know The Unknown Online Service Packs Unknownsoft
KWB
 Knowledge WorkBench Prodeo
KYB
 Keyboard mapping FTP Software PC/TCP

L

Ext. Description Used by
L
 LEX source code file
L
 Linker directive file WATCOM wlink
L
 LISP source code file
LA0
 Datafile SCUMM index file
LAB
 Datafile NCSS - SOLO
LAB
 Mailing labels Q+E for Microsoft Excel
LAN
 Erdas image file
LAN
 LAN Drivers Novell NetWare
LANG
 Language file Minecraft, Skype
LAS
 Lasso File Lasso Programming Language File
LASSO
 Lasso File Lasso Programming Language File
LAY
 Word chart layout APPLAUSE
LBG
 Label generator data dBASE IV
LBL
 Label dBASE IV - Clipper 5 - dBFast
LBM
 Graphics format (Amiga) Pic-view - Deluxe Paint
LBM
 Linear bitmap graphics XLib
LBO
 Compiled label dBASE IV
LBR
 .LBR Archive for CP/M and MS-DOS using the LU program
LBR
 Display driver Lotus 1-2-3
LBT
 Additional (FPT) label description file FoxPro
LBX
 Main (DBF) label description file FoxPro
LCF
 Linker Control File Norton Guides compiler
LCH
 Chart IBM Works for OS/2
LCK
 Lockfile Paradox
LCL
 Data (FTP Software PC/TCP)
LCL
 Data FTP Software PC/TCP
LCN
 Lection WordPerfect
LCS
 Datafile ACT! History Files
LCW
 Spreadsheet Lucid 3-D
LD
 Long Distance codes file Telix
LDA
 Absolute binary file (load image) PDP-11, RT-11
LD1
 Overlay file dBASE
LDB
 Data filer database IBM Works for OS/2
LDB
 Overlay file Microsoft Access
LDF
 Data filer form IBM Works for OS/2
LDF
 Library definition file Geoworks Glue
LDT
 Labordatenträger, an xDT application Healthcare providers in Germany
LE
 DOS/4GW executable image DOS/4GW PM 32X DOS Extender
LES
 Lesson (check *.cbt)
LEV
 Level file NetHack 3.x
LEX
 Dictionary Microsoft Word - Lexicon
LFL
 LucasArts resource file
LFD
 LucasArts resource file LucasArts games
LFT
 Laser printer font ChiWriter
LG
 Logo procedure definitions LSRHS Logo
LGO
 Logo for header and footer SuperFax
LGO
 Startup logo code Windows 3.x
LHA
 Archive LHA/LHARC
LHW
 Amiga archive LHWARP
LIB
 Library file several programming languages
LIC
 License file used by some programs to put their license on disk
LIF
 Archive
LIF
 CA Clipper packed file CA Clipper installer
LIF
 Logical Interchange Format data file Hewlett-Packard
LIM
 Archive LIMIT
LIN
 Line types AutoCAD
LIS
 Listing VAX
LIT
 Microsoft E-book file Microsoft Reader
LIT
 Web3D File Web3D
LIX
 Log file (history) Audit Command Language (ACL)
LJ
 Text file for HP LJ II printer
LL
 LLVM Assembly Language llvm
LL3
 LapLink III related file (document) LapLink III
LM
 Auran Jet LOD mesh table (text file to control LODs) Trainz
LMP
 Doom lump (data file, commonly "demo" recordings) Doom - Doom2
LNG
 Language definition file
LNK
 Linker response file .RTLink
LNK
 Linker script
LNK
 Windows 95 shortcut Windows 95
LNK
 Windows XP shortcut Windows XP
LOD
 Load file
LOG
 Log file Numerous systems
LOM
 3D Model Lock On: Modern Air Combat
LPC
 Printer driver TEKO
Lyrics data
LRF
 Linker response file Microsoft C/C++
LRF
 Unencrypted BroadBand eBook file Sony Librie eBook reader
LRP
 Report IBM Works for OS/2
LRS
 Language Resource File WordPerfect for Win
LRX
 Encrypted BroadBand eBook file Sony Librie eBook reader
LSA
 Lightscape Technologies ASCII
LSB
 Lightscape Technologies Binary
LSP
 LISP source code file Xlisp, AutoLISP
LSS
 Spreadsheet Legato - IBM Works for OS/2
LSS
 SYSLINUX Splash Screen Graphic SYSLINUX, XnView
LST
 Aus. BOM Hourly weather Data
LST
 Filelist FRQView
LST
 Keyboard macro 1st Reader
LST
 List file (archive index - compiler listfile)
LST
 Listing (e.g. source code)
LST
 Map list Holux - Alan
LST
 Spool file Oracle
LST
 SLP output file RT-11
LTA
 Data LithTech ASCII 3D object
LTM
 Form (Lotus Forms) Lotus
LUA
 Lua script file Microsoft Visual C++, Notepad++
LUW
 label data file Labels Unlimited for Windows
LUX
 2D and 3D graphics data file Foliomap and Spectramap
LUZ
 3D graphics data file Spectramap CUDA
LWD
 Text document LotusWorks
LWO
 Lightwave Object Format
LWP
 Word processor IBM Works for OS/2, Lotus Wordpro
LXF
 Lego Exchange Format Lego Digital Designer data file
LXO
 Luxology scene modo3D software
LXT
 Temporal database file GTKWave data file
LY
 LilyPond Notation File LilyPond
LYR
 Lyrics (ASCII)
LYT
 Document Layout file Adminsoft Accounts
LZ
 Archive Lzip
LZD
 Difference file for binaries LDiff 1.20
LZH
 Archive LHA/LHARC
LZS
 Archive LARC
LZW
 Archive LHWARP
LZX
 Amiga Archive LZX

M–R

S–Z

References

  1. ↑ "EMC NetWorker Release 7.5 and Service Packs Release Notes Rev A19". Learning Ace. EMC Corporation. 2010-07-14. p. 8. Retrieved 2014-07-28. The files syscache.hve, syscache.hve.LOG1 [...] located in the %systemdrive%\system volume information folder, will be skipped during backup. These hive files are used for maintaining extended data for executable files on the system, such as SRP (Software Restriction Policies) and Applocker. Microsoft recommends not restoring these files. These files are created from derived data and will be rebuilt over time.
  2. ↑ "karafun fileformats @ developer`s homepage". Karafun.com. Retrieved 2012-06-19.

External links