| .f | Fortran Source Format |
| .f#+a | RagTime Classic |
| .f#+d | RagTime Classic |
| .f+db | Microsoft FoxPro Database |
| .f01 | HEC-RAS Flow |
| .f02 | HEC-RAS Flow |
| .f04 | HEC-RAS Flow |
| .f05 | HEC-RAS Flow |
| .f06 | DOS Screen Text 6 Pixels Height Font |
| .f08 | DOS Screen Text 8 Pixels Height Font |
| .f09 | DOS Screen Text 9 Pixels Height Font |
| .f10 | DOS Screen Text 10 Pixels Height Font |
| .f11 | DOS Screen Text 11 Pixels Height Font |
| .f12 | DOS Screen Text 12 Pixel Height Font |
| .f13 | Dos Screen Text 13 Pixels Height Font |
| .f16 | DOS Screen Text 16 Pixels Height Font |
| .f2b | ProntoGERBER-CONNECTION Board Database |
| .f2f | Byteworx FMEA Exported Data |
| .f2r | Farandole Linear Module Format |
| .f32 | Floating Point Raw 32-bit IEEE Data |
| .f3d | Fusion 3D Design |
| .f3f | Crazy Machines Font Data Format |
| .f3r | Farandole Blocked Linear Module Format |
| .f4a | Adobe Flash MP4 Audio Stream Format |
| .f4b | Adobe Flash MP4 Audio EBook |
| .f4f | Flash Video Fragment |
| .f4m | Adobe HTTP Dynamic Streaming Flash Media Manifest |
| .f4p | Adobe Flash Protected MP4 Format |
| .f4v | Adobe Flash Mp4 Format |
| .f4x | Adobe HTTP Dynamic Streaming Index |
| .f64 | Floating Point Raw 64-bit IEEE Data |
| .f90 | Intel Fortran 90 Language Source Format |
| .f95 | Fortran 95 Language Source Code |
| .fa | FASTA DNA Data Format |
| .fac | Facemaker Face Format |
| .face | UNIX FaceSaver Bitmap Image Format |
| .facefx | FaceFX Actor Format |
| .facefx_ingame | FaceFX In-Game Actor Format |
| .fact | EIAS ElectricImage 3D |
| .factorypath | Eclipse Factorypath |
| .fad | Office Attribute Database |
| .fadein | Fade In Screenwrite Document |
| .fae | MS Office 97 Converter DLL |
| .fag | Win32.AutoRun.fag |
| .fal | Bitmap Graphics Image Header Information Q0 |
| .fam | The Sims Family |
| .familyfile | Reunion Family Format |
| .fan | Form•Z Animation Format |
| .faq | Frequently Asked Questions Format |
| .far | Farandole Composer Music Module |
| .fas | AutoCAD Fast-load Auto LISP Format |
| .fasta | FASTA Format DNA And Protein Sequence Alignment |
| .fat | Zinf Theme Format |
| .fatesavedgame | Fate Save Game |
| .fateundiscoveredrealmssavedgame | Fate Undiscovered Realms Save Game |
| .fau | Simulation Laboratory Creator Collapsed Fault List |
| .fav | Microsoft Outlook Bar-shortcut |
| .favorite | Apple IDVD Favorite |
| .favoritemetadata | Transmit For Mac Login Data Format |
| .fax | Fax File (generic Group 3 1bit Encoded Data) |
| .fb | DR-DOS Backup |
| .fb! | FlashGet Incomplete Download |
| .fb1 | FAWAVE Binary |
| .fb2 | FictionBook EBook Format |
| .fbc | Family Tree Compressed Backup Format |
| .fbd | FlowBiz Workflow Designer Procedure Document |
| .fbf | Free Backup Fix Backup Format |
| .fbg | Shape Pro Ground Surface |
| .fbi | Total Annihilation Main Unit Definition |
| .fbk | Microsoft Dynamics NAV Backup Format |
| .fbl | IGO Map Format |
| .fbm | Fuzzy Bitmap Image Format |
| .fbn | ArcView Spatial Index |
| .fbnd | Apple Communication Tool |
| .fbok | Adobe FrameMaker Book |
| .fbp | WxFormBuilder Project Format |
| .fbp7 | FinalBuilder 7 Project |
| .fbproj | FlippingBook Photo Album Project |
| .fbq | Trine 2 Game Archive |
| .fbr | BB FlashBack Recorded Video Format |
| .fbrb | Battlefield Bad Company 2 Game Format |
| .fbs | Fastbid |
| .fbt | ABBYY FineReader Document Options Format |
| .fbu | FEBE Firefox Add-in ZIP Format |
| .fbv | FinalBuilder Persistent Variables |
| .fbw | HP Backup Split Backup Format |
| .fbx | Autodesk FBX Interchange Format |
| .fbz | BB FlashBack Screen Record Format |
| .fbz6 | FinalBuilder Compressed Project |
| .fbz7 | Compressed FinalBuilder 7 Project |
| .fc13 | FutureComposer Audio |
| .fc14 | FutureComposer Audio |
| .fc2 | Poser Face Pose Format |
| .fc2map | Far Cry 2 User Map Format |
| .fca | Omnis Web Client |
| .fcb | FAAST Builder |
| .fcc | SiteMinder Forms Credential Collector Format |
| .fcd | Virtual CD Backup Image Format |
| .fcdt | Adobe FormsCentral Form Template Format |
| .fce | EDraw Max Format Format |
| .fcf | Final Draft Document Format |
| .fcg | FastCGI Script |
| .fcgi | FastCGI Script Format |
| .fchc | Fetch Cache |
| .fchk | Gaussian Checkpoint |
| .fchp | Fetch Preference |
| .fcl | FidoCAD Library Format |
| .fcm | FCraft World Format |
| .fcod | Adobe PageMaker Filter |
| .fcp | Final Cut Pro Project Format |
| .fcpa | Officer Cost Report Data |
| .fcpr | Officer Cost Report Data |
| .fcproject | Final Cut Pro X Project Format |
| .fcr | Cost Report Data |
| .fcs | First Choice Spreadsheet |
| .fcstd | FreeCAD Drawing Format |
| .fct | FolderClone Task List Format |
| .fcw | FastCAD CAD Format |
| .fcxe | FileCapsule Deluxe Encoded |
| .fcxr | FileCapsule Deluxe |
| .fcxu | FileCapsule Deluxe |
| .fcz | Poser Compressed Face Pose Format |
| .fd | DataFlex Field Offsets For Compiler |
| .fd1 | Windows Live Photo Gallery Thumbnail Database |
| .fd2 | Epson EasyPrint PictureMate Borders Format |
| .fda | Warhammer 40,000 Audio Format |
| .fdb | Database Format |
| .fdc | Autodesk AutoCAD Field Catalogue Format |
| .fdd | Parallels Virtual Machine Floppy Disk Drive Image |
| .fde | FLAMES Dataset Export |
| .fdf | Adobe Acrobat Portable Document Input Form |
| .fdi | Floppy Disk Image |
| .fdk | Fluentizer Fluent Dictionary |
| .fdl | Corel Paradox Secondary Index |
| .fdlang4 | FeedDemon Language Resource |
| .fdm | Microsoft Exchange Server Form Message Format |
| .fdml | Forms Definition Markup Language |
| .fdoc | Microsoft XPS Document Settings |
| .fdp | FMOD Designer Project Format |
| .fdpart | Fresh Download Partial Downloaded |
| .fdr | Final Draft Document Format |
| .fdrp | Apple Mac OS Folder Alias |
| .fdrtemplates | FDRTools Template |
| .fds | FME Desktop Custom Format |
| .fdseq | XPS Document Related Data |
| .fdsrch2 | FeedDemon Search Data |
| .fdt | Final Draft Script Attributes Format |
| .fdu | Natural Security |
| .fdw | FEBDOK Document |
| .fdx | Final Draft XML Document Format |
| .fdxsl4 | FeedDemon Newspaper Style |
| .fdxt | Final Draft 8 Template Format |
| .feature | Microsoft Visual Studio SharePoint Feature Format |
| .feb | Corel WordPerfect Figure Editor Button Bar |
| .fed | FORMIK Form Data |
| .feed-ms | Microsoft Rss Feed Store |
| .feedback | Expression SketchFlow Feedback Format |
| .feedsdb-ms | Microsoft RSS Feeds Store |
| .fem | FEFLOW FEM Problem |
| .fes | Fileless Occurrence Placeholder |
| .fet | Free Timetabling Software |
| .fev | FMOD Audio Settings Format |
| .fex | WebFOCUS FOCUS Web390 Procedure |
| .fext | Extensions Manager Preferences |
| .fez | FUND E-Z Backup Archive |
| .ff | Call Of Duty FastFile Format |
| .ff0 | RISC OS TIFF Bitmap Image |
| .ff2 | Hello Engines! |
| .ff6 | RISC OS Encapsulated PostScript |
| .ff9 | Acorn RISC OS Bitmap Image Sprite |
| .ffa | Find Fast Indexer Status Format |
| .ffd | FlashFiler Format |
| .ffdata | ABBYY Eform |
| .fff | Gravis Ultrasound PnP Bank Format |
| .ffil | Mac OS X Data Fork Suitcase Format |
| .ffindex | FFmpegSource2 Media Index |
| .ffl | Find Fast Indexer Document List Format |
| .ffn | FIFA World Cup Game Data Fe Art |
| .ffo | Find Fast Indexer Document Properties Cache Format |
| .ffpreset | FFmpeg Preset |
| .ffs | FME Desktop Feature Store Format |
| .ffs_batch | FreeFileSync Configuration |
| .ffs_db | FreeFileSync Database |
| .ffs_gui | FreeFileSync Configuration |
| .ffs_real | FreeFileSync Configuration |
| .fft | Find Fast Indexer Format |
| .ffu | Windows Phone Full Flash Update |
| .ffwp | FormsForWeb Packet Format |
| .ffx | Find Fast Indexer Index Format |
| .fg | FaceGen Project Format |
| .fg3 | FX Graph Interactive Graph Format |
| .fga | Folder Guard Attributes |
| .fgb | Valve SDK Source |
| .fgc | Greeting Card Factory Greeting Card |
| .fgd | Macromedia Director Graphic Format |
| .fgdb | Fontographer Mac |
| .fgf | Nav.Net NG Fusker Generator |
| .fgl | Fifth Generation Language (5GL) Source Code Format |
| .fgp | Folder Guard Passwords |
| .fgr | FRSGiftRegistry Database |
| .fgt | FreeGantt Skeleton |
| .fgz | Formula Graphics Standalone Presentation Archive |
| .fh | Symantec Backup Exec Format |
| .fh10 | Adobe FreeHand 10 Drawing Format |
| .fh11 | Adobe FreeHand 11 Drawing Format |
| .fh12 | Adobe FreeHand Drawing |
| .fh2 | Adobe FreeHand Drawing |
| .fh3 | Adobe FreeHand Drawing |
| .fh4 | Adobe FreeHand Drawing |
| .fh40 | Adobe Freehand For Mac |
| .fh5 | Adobe FreeHand Drawing |
| .fh50 | Adobe Freehand Creator Code |
| .fh6 | Adobe FreeHand Drawing |
| .fh7 | Adobe FreeHand 7 Drawing Format |
| .fh8 | Adobe FreeHand 8 Drawing Format |
| .fh9 | Adobe FreeHand 9 Drawing Format |
| .fha3 | Adobe Freehand For Mac |
| .fhc | Canute - FHC Data Format |
| .fhd | Adobe FreeHand Vector Drawing Format |
| .fhd3 | FreeHand |
| .fhf | Free Hide Folder Data Format |
| .fhm | ASIP Meister |
| .fhs | Adobe Flash Skin XML |
| .fhx | DeltaV Configuration |
| .fhz | Adobe Robohelp ZIP Compressed Skin |
| .fi | Flash Image Image |
| .fib | File Investigator |
| .fic | WINDEV Hyper File Database |
| .fid | File Investigator Database Format |
| .fido | Kodak Cineon Image Format |
| .fif | Fractal Image Format |
| .fiff | Elekta Neuromag Data |
| .fig | Xfig Drawing |
| .fil | File List |
| .fila | Aleph One Replay Format |
| .file | Generic Windows Format |
| .fileloc | Apple Mac OS X Finder Internet Location |
| .filepart | WinSCP Temporary Download |
| .file_crcs | Electronic Arts Origin Client |
| .film | Filmkey Player Media |
| .filters | Microsoft Visual Studio VCX Project Filter Format |
| .fim | Fractal Imaginator Data/Parameter |
| .fimpp | FiM++ Source Code Format |
| .fin | Corel WordPerfect Print Format Text |
| .fio | Aldus PhotoStyler Graphics Filter |
| .fir | FireOne Fireworks Show |
| .fire | FireStarter Project Format |
| .first | Formatted Text |
| .fis | Dynamite VSP Feature Interpretation Style |
| .fit | Flexible Image Transport System Format |
| .fits | Flexible Image Transport System Format |
| .fiv | File Investigator |
| .fiz | FITS Graphics |
| .fjl | Rootkit.Win32.Agent.fjl Virus |
| .fjsw | Formulator Tarsia Jigsaw |
| .fjv | IGO Primo Map Related |
| .fkc | FBackup Catalog |
| .fkd | FotoKiss Photo Set Data |
| .fkt | KmPlot Data |
| .fky | Visual FoxPro Macro Format |
| .fl | Adobe Flash Project Format |
| .fl3 | Flash 3D Format |
| .fla | Editable Adobe Flash Movie Format |
| .flac | Audio Files Encoded By Flac - Free Lossless Audio Codec |
| .flam3 | Fractal Flames Format |
| .flame | Fractal Flames Format |
| .flb | FileMaker Pro Label Format |
| .flc | AutoDesk FLIC Format |
| .fld | YSFLIGHT Field Format |
| .flexolibrary | Final Cut Pro Library |
| .flf | Microsoft Dynamics NAV License Format |
| .flg | IsoPuzzle Flag Format |
| .flh | FLIC Animation Format |
| .fli | Autodesk Animator FLIC Animation Old Format |
| .flic | Autodesk Animator Animation |
| .flipchart | ActivInspire Flipchart Format |
| .fli_ | Autodesk Animator FLIC Animation Old Format |
| .flk | Folder Lock Encrypted Format |
| .flka | Folder Lock Encrypted Portable Folder Format |
| .flkb | Folder Lock Encrypted Folder Format |
| .flkw | Folder Lock Encrypted |
| .fll | Micrografx Designer Image Fill Pattern |
| .flm | Adobe Premiere Filmstrip |
| .flmod | Freelancer Game Archive |
| .fln | Flight Plan |
| .flo | Micrografx FlowCharter Flowchart Format |
| .flow | Expression SketchFlow Data Format |
| .flp | Floppy Disk Image |
| .flr | Netscape Live3D Format |
| .fls | Adobe Flash Lite Sound Bundle Format |
| .flst | Adobe InDesign Format |
| .flt | Autodesk Animator FLIC Format |
| .flt3 | Adobe Filter |
| .flux | FluxTime Studio Clip |
| .flv | Flash Video Format |
| .flvat | Downloaded Flash Video |
| .flw | Freelance Flowchart |
| .flwa | Folder Lock Wallet Format |
| .flx | FelixCAD Drawing Format |
| .fly | Digiflyer E-mail Document |
| .flz | MediaShow Data |
| .fm | FileMaker Pro Database Format |
| .fm1 | Lotus 1-2-3 Release 2.x Spreadsheet |
| .fm2 | FCEUX Movie |
| .fm3 | Lotus 1-2-3 Release 3.x Spreadsheet Format |
| .fm5 | FileMaker 5 Database Format |
| .fmap | Family Atlas Pulbished Family Map |
| .fmb | WordPerfect For Win File Manager Button Bar |
| .fmc | NCAD |
| .fmcf | Adobe Type Manager Preferences |
| .fmd | Microsoft Access |
| .fmdb | BUILD-QUANT Object Database |
| .fme | FME Mapping Format |
| .fmelic | FME License Format |
| .fmf | FaxMan Jr Fax |
| .fmi | FME Workbench Mapping Format |
| .fmj | FaceMorpher Project |
| .fmk | FaxMaker |
| .fmk$ | FileMaker For Mac |
| .fmk4 | FileMaker For Mac |
| .fml | WWE RAW Character Format |
| .fmo | DBASE IV Compiled Format |
| .fmod | Adobe Illustrator Flattening Module Format |
| .fmp | AutoCAD Font Map |
| .fmp12 | FileMaker Pro Database Format |
| .fmp3 | FileMaker Pro For Mac Document |
| .fmplugin | FileMaker Pro Plug-in Format |
| .fmpp | FLAMES Model Prototype |
| .fmpr | FileMaker Pro Mac |
| .fmpsl | FileMaker Pro Database Snapshot Format |
| .fmr | BrainVoyager QX Project |
| .fms | Lotus Freelance Graphics |
| .fmt | Database Format Format |
| .fmtr | FileMaker Transfer |
| .fmv | Bink Tools Full Motion Video Format |
| .fmw | FME Workspace Format |
| .fmx | FileMaker Pro Plug-in Format |
| .fmxlist | FME Transformer List Format |
| .fmxt | FileMaker Pro Mac |
| .fmz | Form-Z Project Format |
| .fn3 | Harvard Graphics 3.0 Font |
| .fna | FASTA DNA And Protein Sequence Alignment |
| .fnbk | Food Network Recipe Manager Recipe Data Format |
| .fnc | Frogans Network Certificate |
| .fnd | Microsoft Windows Explorer Saved Search Format |
| .fndr | Xmap For Mac |
| .fnet | FileMaker Network |
| .fnf | Forte Notation |
| .fni | FileNet IDM Viewer |
| .fnk | FunkTracker Module |
| .fnl | Microsoft Live Mesh |
| .fnlf | Novation Automap License Format |
| .fnm | Apache Lucene Field |
| .fnn | DOS Screen Text Font |
| .fno | Atlast File Notes Organizer CSV Data |
| .fnr | Trojan-Dropper.Win32.Flystud.lc. |
| .fnrecipes | Food Network Recipe Format |
| .fns | Apple FontSyncScripting Font Profile |
| .fnsp | Apple FontSync Scripting |
| .fnt | Font Format |
| .fnta | Marathon 2 Aleph One Font Format |
| .fnx | Fenix Key |
| .fo | XSL-FO Form Format |
| .fo1 | Borland Turbo C Font |
| .fo2 | Borland Turbo C Font |
| .fob | Microsoft Dynamics NAV (Navision) Attain Object Format |
| .foc | FOCUS Database |
| .fod | EZ-Forms ULTRA |
| .fodg | OpenDocument Flat XML Drawing |
| .fodp | OpenDocument Flat XML Presentation Format |
| .fods | OpenDocument Flat XML Spreadsheet Format |
| .fodt | OpenDocument Flat XML Document Format |
| .fof | EZ-Forms Filled Out Form |
| .fog4 | Fontographer 4 |
| .fol | PFS First Choice Database Format |
| .folder | Microsoft Windows Explorer Folder |
| .folx | Folx Download Format |
| .fom | EZ-Forms Fill Out Master Form |
| .fomod | Fallout 3 Mod Format |
| .fon | Microsoft Windows Bitmap Font Format |
| .font | Font Data |
| .fop | InfoZoom Protected Data Format |
| .for | Fortran Source Format |
| .form | Java Form |
| .forth | Forth Source Code |
| .fos | Fallout 3 Saved Game Format |
| .fot | Font Resource Format |
| .fota | Firmware Over-the-Air Format |
| .foundfiles | MAC OS X |
| .fountain | Fountain Syntax |
| .fov | MORSE Field Of View |
| .fox | FoxBase FoxPro Executable Format |
| .fp | Microsoft FoxPro Configuration Format |
| .fp2 | Insaniquarium Deluxe Fish |
| .fp3 | FileMaker Pro Database Format |
| .fp4 | FileMaker Pro Database Format |
| .fp5 | FileMaker Pro Database Format |
| .fp7 | FileMaker Pro Database Format |
| .fpa | Front Panel Designer Encrypted Order Format |
| .fpage | Microsoft XPS Document Page |
| .fpb | FLAMES Playback Recorder |
| .fpbf | Mac OS X Finder Burnable Backup Archive |
| .fpc | FoxPro Catalog |
| .fpd | MicroSim PCBoard External ASCII Footprint Definition Format |
| .fpe | FPS Creator Entity Format |
| .fpenc | FileProtect Encrypted Format |
| .fpf | IKEA Home Planner Format |
| .fpfv | File Protected From Virus |
| .fpg | DIV Games Studio Multi Map Image Format |
| .fpi | FPS Creator Intelligence Script Format |
| .fpid | FPS Creator AI Wizard Data Format |
| .fpix | FlashPix Bitmap Image |
| .fpj | FARSITE Project Format |
| .fpk | Civilization IV Game Archive |
| .fpkg | Apple Mac OS X Installer Package |
| .fpl | Flitskikker Language |
| .fpm | FPS Creator Map Format |
| .fpmb | FPS Creator Map Buffer Format |
| .fpmo | FPS Creator Map Overlay Format |
| .fpop | Spider-Man: Shattered Dimensions Saved Game |
| .fpos | Photo Pos Pro Image Format |
| .fpp | FPS Creator Prefab Format |
| .fpr | Fruitypro Samples Humanize Presets Grooves |
| .fps | FPS Creator Project Format |
| .fpsl | FileMaker Pro Snapshot Link |
| .fpsx | Symbian Firmware Flash Format |
| .fpt | FileMaker Pro Database Memo Format |
| .fpw | FoxPro Configuration |
| .fpx | Kodak FlashPiX Bitmap Image |
| .fqc | FAQ Creator Format |
| .fqf | FlashFXP Queue |
| .fqy | FLAMES (FLARE) Command |
| .fr | French Language Translation |
| .fr3 | FastReport Form Format |
| .fr4 | Fractal Explorer Quaternion Spots In Internal Parametrical Format |
| .fra | Adobe Framemaker |
| .frag | Microsoft XPS Document Fragment |
| .fram | Adobe Framemaker |
| .frame | Adobe FrameMaker Interchange Format |
| .frames | The Iconfactory XScope Frame Format |
| .framework | Apple Mac OS X Application Framework Format |
| .frc | Microsoft Flight Simulator FS Recorder Recorded Format |
| .frd | Need For Speed Track Data |
| .fre | FIFA 2002 Data Legal Screen |
| .fred | FredEditor Sound |
| .freecellsave-ms | FreeCells Saved Game Format |
| .freelist | ArcGIS |
| .frelf | Abbyy FineReader Engine License |
| .freq | SAM Frequency Model |
| .freshcontact | NAVIGON MobileNavigator Navigation |
| .frf | FreeReports Template Format |
| .frg | DBASE IV Uncompiled Report Format |
| .fri | Firefox Bookmark Backup |
| .frj | FreeForm-J Project Format |
| .frk | Apple Macintosh Resource Or Data Fork |
| .frl | Formflow Electronic Form Loader |
| .frm | MySQL Database Metadata Format |
| .frm16 | Lionheart: Legacy Of The Crusader Game |
| .fro | DBASE IV Compiled Report Format |
| .frp | PerForm Or FormFlow Form |
| .frq | Bibexcel |
| .frr | Mandelbrot Explorer Fractal Region Settings Format |
| .frs | Corel WordPerfect Screen Font Resource Format |
| .frt | Visual FoxPro Additional Report Description Format |
| .frv | Microsoft FRx |
| .frw | RollerCoaster Tycoon Fireworks Source |
| .frx | Visual FoxPro Main Report Description Format |
| .fry | Fryrender Export Format |
| .frz | Snes9x Saved State Format |
| .fs | Microsoft Visual F# Source Code Format |
| .fs2 | Descent FreeSpace 2 Game Format |
| .fs5 | Microsoft Flight Simulator Scenery |
| .fs6 | Microsoft Flight Simulator Panels |
| .fsa | FASTA DNA And Protein Sequence Alignment |
| .fsb | FMOD Audio Format |
| .fsc | FruityLoops Score Format |
| .fsd | COCO AmsterCHEM Flowsheet Document |
| .fseventsd | MAC OS X |
| .fseventsd-uuid | Fseventsd |
| .fsf | Microsoft Office Cache |
| .fsg | IBM Voice Type Languages Map Format |
| .fsh | Fragment Shader Format |
| .fsi | Microsoft Visual F# Signature Format |
| .fsif | MyLabel Designer Deluxe Label Format |
| .fsk | FotoSketcher Parameter Preset |
| .fsl | Corel Paradox Compiled Form Format |
| .fsm | Farandole Composer WaveSample Music Format |
| .fsn | Greeting Card Factory Greeting Card |
| .fso | Adobe Flash Media Server File System Object |
| .fsp | Fsplit Split |
| .fsproj | Microsoft Visual Studio Visual F# Project Format |
| .fsq | CryENGINE Facial Editor Sequence Format |
| .fsr | File Substring Replacement Utility |
| .fss | Micrografx Picture Publisher 8 Register Format |
| .fssave | Flight Simulator Save Format |
| .fsscript | Microsoft Visual Studio F# Script Format |
| .fst | FL Studio Format |
| .fstab | File System Table |
| .fsx | Microsoft Visual Studio F# Script Format |
| .fsy | PhotoFantasy Image Picture |
| .fsz | Fractal Zplot Data/parameter |
| .ft | Lotus Notes Full Test Index |
| .ft10 | Adobe FreeHand 10 Template Format |
| .ft11 | Adobe FreeHand 11 Template Format |
| .ft30 | Adobe PageMaker For Mac Filter |
| .ft7 | Adobe Freehand 7 Template Format |
| .ft8 | Adobe FreeHand 8 Template Format |
| .ft9 | Adobe FreeHand 9 Template Format |
| .ftb | Family Tree Maker Genealogy |
| .ftc | FluxTime Clip Format |
| .ftch | Extensis Portfolio Image Database |
| .ftd | FFT Designer Project |
| .ftf | Sony Ericsson Xperia Android Firmware |
| .ftg | Microsoft Windows Help Format |
| .fth | FileMaker Pro Theme Format |
| .ftil | E-Hastakshar Contract Note Format |
| .ftk | Forensic Toolkit |
| .ftl | FreeMarker Template Format |
| .ftm | Micrografx Font Format |
| .ftmb | Family Tree Maker Backup |
| .ftmt | Family Tree Maker Chart Template |
| .ftmx | Finale Score Template |
| .ftn | Fortran Language Source Code Format |
| .ftp | FTP Configuration |
| .ftpl | Simfatic Forms Template |
| .ftploc | Apple Mac OS X Finder FTP Location Format |
| .ftpquota | Ftpquota Format |
| .ftr | IRIX |
| .fts | Flexible Image Transport System Format |
| .ftv | CA CleverPath Forest & Trees |
| .ftw | Family Tree Maker Format |
| .fud | FairUse Wizard Data |
| .fuj | Worm.Win32.AutoRun.fuj Virus |
| .fuk | Postal 2 Map |
| .ful | Microsoft Backup File List |
| .full | Cygwin Variable Log |
| .fun | Koolmoves |
| .fus | GURU Uninstall Script |
| .fuse_hidden | Samba |
| .fv | Fresh View Thumbnail Cache |
| .fve | Windows BitLocker Full Volume Encryption |
| .fvp | FLUENT Path Line |
| .fvu | File Validation Utility Input |
| .fw | Firmware Update Format |
| .fw2 | FrameWork Database |
| .fw3 | FrameWork III Database |
| .fw4 | Framework IV |
| .fwb | FileWrangler Data Backup |
| .fwd | Imail Server Forwarded Mail |
| .fwdn | FWriter Document |
| .fweb | Fortran WEB |
| .fwf | Bentley InRoads Survey Feature Table |
| .fwl | FileWrangler EXE Library |
| .fwp | Frontpage Web Packages |
| .fws | FileWrangler Data File For File Splitting Configuration |
| .fwt | FacetWin Configuration Format |
| .fwx | FoxWeb Script |
| .fx | DirectX D3DXEffect Object Format |
| .fx2 | Corel WordPerfect Office Template |
| .fx3 | Fugawi Map |
| .fx4 | Fugawi GPS Map |
| .fxa | OC3 FaceFX Actor Format |
| .fxb | Steinberg VST Audio Plug-in Format |
| .fxc | DIMDATA FilePackager Configuration Format |
| .fxcb | Crysis Shader Cache |
| .fxcproj | NVidia FX Composer Project Format |
| .fxd | FoxPro FoxDoc Support |
| .fxf | IBM BigFix Action Format |
| .fxg | Adobe Flash XML Graphics Format |
| .fxh | MetaTrader 4 Backup |
| .fxi | File-Ex Data |
| .fxl | FaceFX Batch Format |
| .fxm | Fuxoft AY Music Chip Language Format |
| .fxml | Oracle FXML Language Source Code |
| .fxo | WinFax Image Format |
| .fxp | Visual FoxPro Compiled Database Format |
| .fxpl | Adobe Flash Catalyst FXP Library Format |
| .fxr | Oracle Font Cross-reference |
| .fxs | WinFax Transmit Format Graphics Format |
| .fxt | Finale Plug-in Format |
| .fxtc | Adobe After Effects Project |
| .fxw | ESignal |
| .fxy | Fortron Embroidery Format |
| .fyc | ESignal |
| .fyi | FLOWCAL Desktop |
| .fz | Fritzing Project Format |
| .fza | Form-Z Autosave Format |
| .fzb | Casio FZ-1 Bank Dump |
| .fzd | AIRLINE City Data |
| .fzf | Casio FZ-1 Full Dump |
| .fzip | Foxit Reader Add-on Format |
| .fzp | Fritzing Part Format |
| .fzv | Casio FZ-1 Voice Dump Format |
| .fzy | LexisNexis Concordance Fuzzy |
| .fzz | Fritzing Data Format |
