List of filename extensions (F–L)
This alphabetical list of filename extensions contains standard extensions associated with computer files.
A–E
F
| Ext. | Description | Used 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 |
| 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 |
| FA | FASTA format sequence file | |
| 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 | |
| FASTA | FASTA format sequence file | |
| FAX | Fax (raster graphics in CCITT format) | most Fax programs |
| FB | Backup files | Fifth Generation Systems FastBack Plus |
| FB2 | FictionBook e-book 2.0 file (DRM-free XML format) | e-book readers |
| FB2K | foobar2000 File | foobar2000 |
| FB2K-COMPONENT | foobar2000 Component | foobar2000 |
| FBM | Fuzzy Bitmap | |
| FBW | HP Backup and Recovery Manager | HP Backup |
| FBX | 3D model geometry, material textures, lighting, armature, and animation sequences for inter application use/transport | Autodesk |
| FC | Spell checking dictionary | Harvard Graphics 2.0 |
| FCM | Binary file patch file (forward compression) | jlpak10.zip |
| FCS | Flow cytometry standard file | |
| 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 |
| FEN | Forsyth–Edwards Notation | Chess applications -text data describes a specific position. |
| 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 |
| FLAC | 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 | Fontographer 3.5 |
| 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 |
| FTB | Compressed Ftb file | Family Tree Builder |
| FTD | Falcon dynamic template | Falcon |
| FTM | Font file | Micrografx |
| FTS | Full text search index of old Windows Help file | Windows 3.0 - XP |
| 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. |
[1]G
| Ext. | Description | Used by |
|---|---|---|
| G | Data chart | APPLAUSE |
| G16 | GoldED for DOS compiled config | GOLDED.EXE |
| G3 | Group 3 Fax | Netpbm, ImageMagick, XnView |
| G3D | Glest model file | G3D viewer |
| G3P | data | Grand Prix 3 car physics |
| 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 |
| GAME | Chess Game | macOS Chess |
| GAMEPROJ | Gamesalad game project format | GameSalad |
| GB | Game Boy ROM | Nintendo |
| GB | GenBank flat file | |
| GB1 | Game Maker backup file (can also be GB2, GB3, etc.) | |
| GBA | Game Boy Advance ROM | Nintendo |
| GBC | Game Boy Color ROM | Nintendo |
| GBK | GenBank flat file | |
| 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 |
| GENBANK | GenBank flat file | |
| 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 |
| GFF | General feature format | |
| 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 | Global index of old Windows Help file | Windows 3.0 - XP |
| GIF | 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 |
| GO | Go source code file | Golang |
| GOC | Goc source code file | Geoworks |
| GOE | GOES graphic file | |
| GOH | Goc header file | Geoworks |
| GP | Geode parameter file | Geoworks Glue |
| GP4 | data | Grand Prix 4 car physics |
| GP5 | Guitar Pro 5 song | Guitar Pro 5 |
| 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 |
| GREENFOOT | Greenfoot Project | Greenfoot |
| 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 |
| GT7 | RS7 Guided tour | Redshift 7 |
| GTA | data | Microsoft Office Groove Tool Archive |
| GTF | Gene transfer format | |
| 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 |
| GZ | 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 |
| HAR | HTTP Archive format (JSON-format web-browser log) | W3C draft standard |
| 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 |
| HHP | Microsoft HTML Help project | Microsoft HTML Help Workshop and Compiler |
| 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 | old Windows Help file | Windows 3.0 - XP, 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 |
| HP9 | ASCII text HP Roman9 character set | |
| 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 |
| HTA | HTML Application | Microsoft Windows |
| HTM | see HTML | |
| HTML | Hypertext Markup Language (WWW) | Netscape - Mosaic - many |
| HTX | Hypertext file | |
| HUS | Husqvarna Viking Embroidery Format | Embroidermodder |
| HVE | Hive file[2] | 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 | Targa ICB bitmap graphics | many raster graphics editors |
| ICC | ICC profile | Color Configuration for color input or output devices |
| ICE | LHA Archive | Cracked LHA (old LHA), Total Commander |
| 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 |
| IGC | Flight tracks downloaded from GPS devices in the International Gliding Commission's prescribed format | |
| IGES | Initial Graphics Exchange Specification | |
| IGF | Inset Systems | GCGW |
| IGF | LasershowGen Frames | LasershowGen |
| IGP | LasershowGen Project | LasershowGen |
| 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) | Sidecar file used by applications that need to store file metadata on filesystems that do not support the metadata natively |
| 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 | |
| INI | Initialization file | |
| INK | Pantone reference fills file | CorelDRAW |
| INO | Arduino file | Arduino |
| 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, Double 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 | Presentation File | Autodesk Inventor |
| 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 |
| IPT | XnView IPTC template | XnView, XnViewMP |
| IPTC | XnView XML-based IPTC template | XnViewMP |
| IPYNB | IPython Notebook | Jupyter Notebook |
| 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 |
| ITR | i-Tree project files | i-Tree Software Suite |
| 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 | |
| JA | Mozilla archive omni.ja | Mozilla Firefox 4, Thunderbird |
| JAD | Java Application Descriptor | Mobile JAR, Java Games and Applications |
| JAM | Jam messagebase | FTN software |
| JAM | 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 |
| JNR | Jinx! file recording | Jinx! LED Matrix control |
| JNX | Saved data | Jinx! LED Matrix control |
| JNX | Garmin raster map file | BirdsEye service (subscription only) |
| 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 |
| JPEG | Joint Photographic Experts Group graphics file format | QPeg - FullView - Display |
| JPG | Joint Photographic Group | |
| 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 | 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 |
| K7Z | Keysight 7-Zip File | Keysight PathWave FPGA |
| 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 |
| KEXT | macOS Kernel Extension[3] | macOS |
| KEY | Datafile | Forecast Pro |
| KEY | Keynote presentation file | Keynote |
| 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|[4] | Karafun Karaoke(R) |
| KFX | Kofax Group | GCGW |
| KFDK | Keysight PathWave FPGA Design File | Keysight PathWave FPGA |
| 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 |
| KODU | Kodu game save file | Kodu Game Lab |
| 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 |
| LBR | EAGLE library file | EAGLE (program)EAGLE |
| 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 |
| LGP | LG Plate file | Lase Graphic Number plate software |
| LGS | LG Sign file | Laser Graphic Signs Software |
| LHA | LHA Archive | LHA/LHARC, Total Commander |
| 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 |
| LISP | LISP source code file | |
| 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 |
| LOCK | Lockfile | Various systems |
| LOD | Load file | |
| LOG | Log file | Numerous systems |
| LOM | 3D Model | Lock On: Modern Air Combat |
| LOVE | LÖVE Game File | LÖVE |
| LPC | Printer driver | TEKO |
| LRC | 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 |
| LS | LiveScript source code file | |
| LSA | Lightscape Technologies ASCII | |
| LSB | Lightscape Technologies Binary | |
| LSC | Leostream Connect file | Leostream Corporation |
| LSD | Lingvo system dictionary | ABBYY Lingvo |
| 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++ |
| LUD | Lingvo user dictionary | ABBYY Lingvo |
| 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 | LHA Archive | LHA/LHARC, Total Commander |
| LZS | LHA Archive | LARC, Total Commander |
| LZW | Archive | LHWARP |
| LZX | Amiga Archive | LZX |
M–R
S–Z
See also
References
- ↑ "Autodesk FBX Files | 3ds Max | Autodesk Knowledge Network". knowledge.autodesk.com. Retrieved 2018-07-28.
- ↑
"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 informationfolder, 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. - ↑ "What are kexts?". MacBreaker. 23 February 2016. Retrieved 2017-01-17.
- ↑ "karafun fileformats @ developer`s homepage". Karafun.com. Retrieved 2012-06-19.
External links
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