| .FNT | Windows Font File | 203 |
| .FON | Generic Font File | 273 |
| .FLA | Adobe Animate Animation | 198 |
| .FLV | Animate Video File | 227 |
| .FM | FrameMaker Document | 225 |
| .FLAC | Free Lossless Audio Codec File | 191 |
| .FB2 | FictionBook 2.0 File | 223 |
| .FPBF | Mac OS X Burn Folder | 300 |
| .FDB | Portfolio Catalog | 224 |
| .FP7 | FileMaker Pro 7+ Database | 200 |
| .FBX | Autodesk FBX Interchange File | 252 |
| .FBR | FlashBack Screen Recording | 208 |
| .FRM | MySQL Database Format File | 244 |
| .F4V | Flash MP4 Video File | 264 |
| .FXG | Flash XML Graphics File | 270 |
| .FPF | IKEA Home Planner File | 200 |
| .FBW | HP Recovery Manager Backup File | 175 |
| .FDX | Final Draft Document | 237 |
| .FS | Visual F# Source File | 208 |
| .FSX | Visual F# Script File | 200 |
| .FSPROJ | Visual F# Project File | 150 |
| .FXP | Adobe Flex Project File | 317 |
| .FTL | FreeMarker Template File | 167 |
| .FMV | FME Desktop Viewspace File | 325 |
| .FMW | FME Workbench File | 133 |
| .FTM | FamiTracker Module | 280 |
| .FLT | OpenFlight Scene Description File | 195 |
| .FCPROJECT | Final Cut Pro X Project File | 325 |
| .FCGI | FastCGI File | 180 |
| .FACEFX | FaceFX Actor File | 200 |
| .FMP12 | FileMaker Pro 12 Database | 256 |
| .FCDT | FormsCentral Design Template | 225 |
| .FMAT | FMAT Runfile | 200 |
| .FCPEVENT | Final Cut Pro Event File | 150 |
| .FMC | FormConnect Form File | 200 |
| .FUN | Cubify Invention File | 350 |
| .FPPX | Microsoft Fresh Paint Painting File | 340 |
| .FREEWAY | Freeway Document | 275 |
| .FETCHMIRROR | Fetch Mirror Document | 200 |
| .FCS | Flow Cytometry Standard File | 120 |
| .FPT | FileMaker Pro Database Memo File | 250 |
| .FRM | Form File | 200 |
| .FLC | FLIC Animation | 300 |
| .FLI | FLIC Animation | 280 |
| .FPX | FlashPix Bitmap Image File | 240 |
| .FXP | FoxPro Compiled Program | 176 |
| .FXP | FX Preset File | 216 |
| .F | Fortran Source Code | 243 |
| .FITS | Flexible Image Transport System File | 250 |
| .FMX | FileMaker Plug-in | 200 |
| .FIC | WinDev Hyper File Database | 200 |
| .F90 | Fortran 90 Source Code File | 250 |
| .FOR | Fortran 77 Source File | 225 |
| .FTW | Family Tree Maker File | 323 |
| .FLP | FruityLoops Project | 180 |
| .FPD | Front Panel Designer Project | 300 |
| .FXC | FilePackager Configuration | 217 |
| .FNC | QuickCAM 3D CNC File | 267 |
| .FPT | FoxPro Table Memo | 186 |
| .FRT | FoxPro Report Memo | 233 |
| .FKY | FoxPro Macro | 300 |
| .FLL | FoxPro Dynamic-Link Library | 300 |
| .FMT | FoxPro Format File | 273 |
| .FH9 | FreeHand 9 Drawing File | 257 |
| .FTPLOC | FTP Location | 300 |
| .FS | FlexiSIGN Document | 337 |
| .FPFV | File Protected From Virus | 300 |
| .FCD | Virtual CD Format | 350 |
| .FRAMEWORK | Mac OS X Application Framework | 233 |
| .FRO | dBASE IV Compiled Report | 367 |
| .F32 | Raw 32-Bit Audio File | 300 |
| .F64 | Raw 64-Bit Audio File | 300 |
| .F2R | Farandoyle Linear Module File | 300 |
| .F3R | Farandoyle Blocked Module File | 300 |
| .FSM | Farandole Composer WaveSample File | 400 |
| .FZF | Casio FZ-1 Full Dump | 300 |
| .FZV | Casio FZ-1 Voice Dump | 300 |
| .FDB | Art Explosion Catalog | 233 |
| .FDR | Final Draft Document | 200 |
| .F | Freeze Compressed File | 219 |
| .FRX | Visual Basic Binary Form File | 207 |
| .FML | WWE RAW Character File | 225 |
| .FCP | Final Cut Project | 250 |
| .FSC | Practical Scriptwriter File | 300 |
| .FLO | iGrafx FlowCharter File | 300 |
| .FLX | FelixCAD Drawing | 340 |
| .FO | XSL-FO Form | 400 |
| .FLT | Adobe Audition Filter | 168 |
| .FLT | Flight Simulator Saved Flight | 186 |
| .FCC | Forms Credential Collector File | 243 |
| .FA | FASTA Formatted Sequence File | 300 |
| .FASTA | FASTA Sequence File | 208 |
| .FLAME | Fractal Flames File | 325 |
| .FBF | Free Backup Fix Backup File | 200 |
| .FOP | InfoZoom Protected Data File | 300 |
| .FOX | InfoZoom Data File | 300 |
| .FLP | ActivPrimary Flipchart File | 264 |
| .FSPROJ | FireStarter Project File | 300 |
| .FLP | Floppy Disk Image | 257 |
| .FBL | CADfix Command Level Log File | 200 |
| .FGL | Fifth Generation Language Source File | 300 |
| .FPM | FPS Creator Map File | 220 |
| .FDI | Amiga Disk Image | 300 |
| .FDR | Windows Error Report File | 150 |
| .FOB | Dynamics NAV Object Container File | 300 |
| .FDB | Microsoft Dynamics NAV Database File | 250 |
| .FBK | Microsoft Dynamics NAV Backup File | 223 |
| .FLF | Microsoft Dynamics NAV License File | 350 |
| .FBP | wxFormBuilder Project | 150 |
| .FRS | Flash Renamer Script | 200 |
| .FUL | Microsoft Backup File List | 200 |
| .FD2 | PictureMate Borders File | 180 |
| .FC2 | Poser Face Pose File | 300 |
| .FCZ | Compressed Poser Face Pose File | 300 |
| .FCW | FastCAD Windows Drawing | 183 |
| .FS2 | FreeSpace 2 Saved Mission File | 300 |
| .FSM | FreeSpace Mission File | 267 |
| .FLH | FLIC Animation File | 300 |
| .FHC | FHC Data File | 433 |
| .FIG | Xfig Drawing | 287 |
| .FF | Call of Duty 4 Fast File | 161 |
| .FST | Crazy Machines 2 Object File | 400 |
| .FIL | Files List Object File | 207 |
| .FBZ | FlashBack Screen Recorder Movie | 367 |
| .FAR | The Sims Archive File | 310 |
| .FFWP | FormsForWeb Packet | 350 |
| .FSM | Splitty Master Split File | 400 |
| .FBC | Family Tree Maker for DOS Backup File | 400 |
| .FBK | Family Tree Maker for Windows Backup File | 420 |
| .FS | Mac OS X File System Plug-in | 322 |
| .FILE | Generic Windows File | 221 |
| .FLO | RFFlow Flowchart File | 143 |
| .FWT | FacetWin Configuration File | 350 |
| .FBU | FEBE Firefox Backup File | 200 |
| .FW | Firmware Update File | 273 |
| .FSB | FMOD Sample Bank File | 233 |
| .FAS | Compiled Fast-Load AutoLISP File | 275 |
| .FLR | Flare Decompiled ActionScript File | 300 |
| .FORGE | Assassin's Creed Game Data File | 166 |
| .FPI | FPS Creator Intelligence Script | 200 |
| .FPE | FPS Creator Entity File | 350 |
| .FPS | FPS Creator Segment File | 183 |
| .FPG | FPS Creator Game Project File | 300 |
| .FX | Direct3D Effects File | 200 |
| .FL | Freelancer Saved Game File | 200 |
| .FH10 | FreeHand 10 Drawing File | 250 |
| .FH11 | FreeHand 11 Drawing File | 240 |
| .FRZ | Snes9x Saved State | 233 |
| .FPSL | FileMaker Pro Snapshot Link | 300 |
| .FD | LaTeX Font Definition File | 250 |
| .FT | Edgecam Feature Template | 250 |
| .FGD | Forge Game Data File | 240 |
| .FSSCRIPT | Visual F# Script | 300 |
| .FSI | Visual F# Signature File | 300 |
| .FXA | OC3 Entertainment FaceFX Actor File | 300 |
| .FRG | Sound Forge Pro Project File | 225 |
| .FMP | AutoCAD Font Map File | 257 |
| .FLST | Adobe InDesign Flattener Presets File | 200 |
| .F4P | Adobe Flash Protected Media File | 257 |
| .F4A | Adobe Flash Protected Audio File | 200 |
| .FXPL | Adobe Flash FXP Library | 300 |
| .FLB | FileMaker Pro Label File | 233 |
| .FMPLUGIN | FileMaker Plug-in | 300 |
| .FTH | FileMaker Theme File | 400 |
| .FNC | Vue Functions File | 300 |
| .FMI | FME Include File | 400 |
| .FME | FME Mapping File | 300 |
| .FDS | FME Custom Format File | 350 |
| .FMELIC | FME License File | 200 |
| .FFS | FME Desktop Feature Store File | 400 |
| .FG | FaceGen Project File | 180 |
| .FLK | Folder Lock File | 433 |
| .FOS | Fallout 3 Saved Game | 225 |
| .FFX | After Effects Preset File | 183 |
| .FLIPCHART | ActivInspire Flipchart File | 233 |
| .FIG | 3ds Max Figure File | 333 |
| .FH | Symantec Backup Exec File | 225 |
| .FDM | Exchange Forms Designer Form Message | 325 |
| .FRY | fryrender Scene File | 300 |
| .FAMILYFILE | Reunion Family File | 300 |
| .FSSAVE | Flight Simulator Save File | 250 |
| .FB! | FlashGet Incomplete Download File | 200 |
| .FSH | Fragment Shader File | 168 |
| .FOT | Font Resource File | 222 |
| .FDT | Final Draft 5-7 Template | 260 |
| .FDXT | Final Draft 8 Template | 300 |
| .FCF | Final Draft Converter File | 200 |
| .FPOS | Photo Pos Pro Image | 300 |
| .FP | Fragment Program File | 367 |
| .FNRECIPES | Food Network Recipe File | 300 |
| .FZ | Fritzing Project File | 212 |
| .FIT | Garmin Activity File | 319 |
| .FR3 | FastReport Form File | 218 |
| .FP3 | FastReport Prepared Report File | 200 |
| .FTN | Fortran Source Code File | 300 |
| .FLOW | Expression SketchFlow Data File | 300 |
| .FEEDBACK | Expression SketchFlow Feedback File | 200 |
| .FWP | Microsoft Expression Web Package | 233 |
| .FXT | FaceFX Actor Template File | 231 |
| .FACEFX_INGAME | FaceFX In-Game Actor File | 300 |
| .FXL | FaceFX Language File | 300 |
| .FOMOD | Fallout Mod Archive | 150 |
| .FCSTD | FreeCAD Document | 233 |
| .FLKA | Folder Lock Portable Locker File | 310 |
| .FLKB | Folder Lock Basic Locker File | 340 |
| .FLWA | Folder Lock Wallet File | 433 |
| .FMZ | Form•Z Project File | 200 |
| .FAN | Form•Z Animation File | 300 |
| .FZP | Fritzing Part File | 350 |
| .FXS | messiahStudio Scene File | 300 |
| .FXM | messiahStudio Motion File | 200 |
| .FMPSL | FileMaker Pro 12 Snapshot Link | 300 |
| .FFF | Hasselblad RAW Image | 200 |
| .FOTA | Firmware Over-the-Air File | 180 |
| .FBZ7 | Compressed FinalBuilder 7 Project | 300 |
| .FCT | FolderClone Task List | 300 |
| .FXG | FX Graph File | 300 |
| .FXCPROJ | FX Composer Project File | 300 |
| .FCM | fCraft World File | 260 |
| .FDP | FMOD Project File | 260 |
| .FEV | FMOD Audio Events File | 186 |
| .FSQ | CryENGINE Facial Editor Sequence File | 300 |
| .FPJ | CryENGINE Facial Editor Project File | 300 |
| .FXL | CryENGINE Facial Expression Library | 250 |
| .FODS | OpenDocument Flat XML Spreadsheet | 300 |
| .FODT | OpenDocument Flat XML Document | 175 |
| .FODP | OpenDocument Flat XML Presentation | 300 |
| .FBK | AutoCAD Civil 3D Field Book File | 200 |
| .FAS | FASTA Sequence File | 320 |
| .FTC | FluxTime Clip File | 342 |
| .FPSX | Nokia Firmware Format File | 222 |
| .FCS | FCEUX Save State File | 250 |
| .F3D | Fusion 3D Design | 257 |
| .FXML | FXML Source Code File | 267 |
| .FORM | NetBeans Java GUI Designer Form | 278 |
| .FTM | Finale Template File | 300 |
| .FTMX | Finale Template File | 200 |
| .FTMB | Family Tree Maker Backup File | 300 |
| .FPA | Finale Performance Assessment File | 267 |
| .FORTH | Forth Language File | 350 |
| .FUK | Postal 2 Map File | 269 |
| .FBQ | Trine 2 Data File | 300 |
| .FKB | Flipkart eBook File | 425 |
| .FAX | Now Contact Fax Template | 220 |
| .FLM | Adobe Scout Session | 171 |
| .FOUNTAIN | Fountain Script File | 267 |
| .FADEIN | Fade In Document | 250 |
| .FC | FirstClass Settings File | 167 |
| .FPDX | Utilius Fairplay Project | 300 |
| .FSTAB | File Systems Table File | 317 |
| .FOLIO | Adobe Folio File | 300 |
| .FWD | RollerCoaster Tycoon 3 Fireworks Display | 300 |
| .FFM | FFmpeg Stream File | 356 |
| .FCPXML | Final Cut Pro XML File | 350 |
| .FCPBUNDLE | Final Cut Pro Library | 300 |
| .FSC | FL Studio Score File | 300 |
| .FLM | FL Studio Mobile Song File | 228 |
| .FLP | FL Studio Project File | 174 |
| .FSD | Flowsheet Document | 175 |
| .FLW | Fusion Flow File | 167 |
| .FINGNET | Overlook Fing Saved Network File | 200 |
| .FRDOC | FineReader Document | 350 |
| .FWDICT | Freeway User Dictionary File | 300 |
| .FWBACKUP | Freeway Backup | 300 |
| .FWTEMPLATE | Freeway Template | 300 |
| .FWTB | Freeway Template Bundle | 300 |
| .FWACTIONB | Freeway Action Bundle File | 300 |
| .FETCHSHORTCUTS | Fetch Shortcut List FIle | 300 |
| .FVP | File Viewer Plus Batch Presets File | 150 |
| .FPR | Audit Workbench Project | 200 |
| .FGC | Greeting Card Factory Card File | 300 |
| .FLOWCHART | PureFlow Flowchart | 300 |
| .FEY | FCS Express Layout File | 200 |
| .FTP | FlashFXP XML File | 200 |
| .FPE | Free PDF Editor Document | 350 |
| .FILEBOLT | Filebolt Encrypted File | 150 |
| .FM | FileMaker Database | 300 |
| .FDF | Acrobat Forms Data Format | 346 |
| .FFA | Find Fast Status File | 250 |
| .FFL | Find Fast Document List | 400 |
| .FFO | Find Fast Document Properties Cache | 250 |
| .FFX | Microsoft Find Fast Index | 200 |
| .FAX | Fax Document | 400 |
| .FP5 | FileMaker Pro 5 Database | 337 |
| .FP | FileMaker Pro Spreadsheet | 260 |
| .FHD | FreeHand Drawing File | 320 |
| .FTS | Full Text Search | 250 |
| .FTG | Full Text Group | 400 |
| .FPP | Fortran Source Code | 262 |
| .FLX | FLIC Animation | 450 |
| .FFD | Flat File Descriptor | 450 |
| .FXB | FX Bank File | 275 |
| .FRK | Macintosh Resource or Data Fork | 400 |
| .FRX | FoxPro Report | 200 |
| .FRZ | Locked FormFlow File | 400 |
| .FAR | Farandole Composer Module | 400 |
| .FPP | Front Panel Project | 400 |
| .FPA | Front Panel Encrypted Order File | 400 |
| .FES | Fileless Occurrence Placeholder | 400 |
| .FDP | MySafe Encrypted Data | 214 |
| .FRM | ADL Form | 417 |
| .FXT | Grand Theft Auto Fake Text File | 158 |
| .FDS | Final Draft Secure Copy | 400 |
| .FRM | Visual Basic Text Form | 229 |
| .FLT | Image Filter | 300 |
| .FP3 | FloorPlan 3D Design File | 267 |
| .FNC | Frogans Player Network Certificate | 467 |
| .FIL | Symbian Application Logo File | 257 |
| .FID | File Expander Engine Descriptions Database | 220 |
| .FSS | Splitty Data Split File | 200 |
| .FTM | Family Tree Maker for DOS File | 280 |
| .FMP | 123 Flash Menu Project | 200 |
| .FEV | FLAMES Environment Variable File | 450 |
| .FC2MAP | Far Cry 2 User Map | 275 |
| .FFIL | Mac Font Suitcase | 300 |
| .FTIL | e-Hastakshar Contract Note | 278 |
| .FLS | Flash Lite Sound Bundle | 240 |
| .FAS | QuickSilver Fast Save Lisp File | 350 |
| .FZIP | Foxit Reader Add-on | 217 |
| .FRC | FS Recorder File | 333 |
| .FH7 | FreeHand 7 Drawing File | 220 |
| .FBL | iGO Map File | 250 |
| .FPMB | FPS Creator Mab Buffer File | 450 |
| .FPMO | FPS Creator Map Overlay File | 400 |
| .FPID | FPS Creator AI Wizard Data File | 400 |
| .FPP | FPS Creator Prefab File | 333 |
| .FXM | WinFax Document | 400 |
| .FSG | FreeCol Saved Game File | 400 |
| .FH8 | FreeHand 8 Drawing File | 233 |
| .FAT | Zinf Theme File | 250 |
| .FD | DataFlex Data File | 400 |
| .FDD | Parallels Desktop Floppy Disk Image File | 400 |
| .FT11 | FreeHand 11 Drawing Template | 400 |
| .FIF | Fractal Image File | 300 |
| .FMV | Frame Vector Metafile | 450 |
| .FLG | IsoPuzzle Flag File | 250 |
| .FRC | Mandelbrot Explorer Color Settings File | 333 |
| .FRR | Mandelbrot Explorer Fractal Region Settings File | 400 |
| .FBR | Mercury Screen Recording | 400 |
| .FRM | Painter Frame Stack File | 483 |
| .FILTERS | Visual C++ Project Filters File | 180 |
| .FXF | BigFix Action File | 200 |
| .FDC | AutoCAD Field Catalog File | 200 |
| .FTL | Family Tree Legends File | 250 |
| .FMOD | Adobe Illustrator Flattening Module | 400 |
| .FLT | Vue Filters File | 320 |
| .FCL | ForeUI Custom Library File | 250 |
| .FCE | ForeUI Custom Element File | 300 |
| .FTH | Foobar2000 Theme File | 350 |
| .FRJ | FreeForm-J Project File | 400 |
| .FPOP | Spider-Man: Shattered Dimensions Saved Game | 175 |
| .FND | Windows Saved Search | 300 |
| .FOLX | Folx Download File | 400 |
| .FDT | FormDocs Template | 467 |
| .FDD | FormDocs Document | 400 |
| .FDT | Lucene Field Data File | 333 |
| .FPK | Civilization 4 Data File | 450 |
| .FNBK | Food Network Recipe Manager Data File | 400 |
| .FFT | Adobe Audition Noise Print File | 400 |
| .FZZ | Fritzing Shareable Project File | 232 |
| .FRF | Free Report Form File | 310 |
| .FTN | Flowton Diagram File | 400 |
| .FHF | Free Hide Folder Backup File | 260 |
| .FTPQUOTA | Ftpquota File | 450 |
| .FZB | Form•Z Project Backup File | 450 |
| .FZA | Form•Z Autosave File | 233 |
| .FSL | Form•Z Script | 333 |
| .FSB | Form•Z Compiled Script | 207 |
| .FZP | Form•Z Plug-in | 400 |
| .FBRB | Battlefield Bad Company 2 Data File | 250 |
| .FBP7 | FinalBuilder 7 Project | 400 |
| .FAVORITEMETADATA | Transmit Favorites Data File | 250 |
| .FLAM3 | Fractal Flames File | 400 |
| .FG3 | FX Graph 3 File | 250 |
| .FLD | YSFLIGHT Field File | 300 |
| .FOX | Furcadia Art File | 300 |
| .FDS | Nintendo FDS ROM | 325 |
| .FEATURE | SharePoint Feature File | 350 |
| .FFD | ffDiaporama Project File | 250 |
| .FCP | Phantasy Star Online 2 Female Cast File | 162 |
| .FX | ReadyBoot Trace File | 286 |
| .FTL | Faster Than Light Mod File | 250 |
| .FNLF | Scarlett Plug-in Suite License File | 425 |
| .FREECELLSAVE-MS | Microsoft FreeCell Saved Game | 200 |
| .FRAMES | xScope Frames File | 350 |
| .FBT | ABBYY FineReader Document Options File | 300 |
| .F4F | Flash Video Fragment | 283 |
| .FH6 | FreeHand 6 Drawing File | 300 |
| .FAN | Finale Font Annotation File | 400 |
| .FRD | Frequency Response Data File | 260 |
| .FPT | Alpha Five Table Memo File | 400 |
| .FP8 | FP8 (= Fast PAQ8) Compressed File | 350 |
| .F06 | Nastran Output File | 333 |
| .F04 | Nastran Execution Summary File | 333 |
| .FADEIN.TEMPLATE | Fade In Template | 250 |
| .FFINDEX | FFmpegSource2 Media Index | 450 |
| .FLK | AccountEdge Company Lock File | 243 |
| .FRM | AccountEdge Form | 429 |
| .FPP | Flow Chart Visual Programming Language Project File | 360 |
| .FRM | Fallout Graphics File | 417 |
| .FLOWMAPLIBRARY | Painter Flowmap Library | 400 |
| .FC1 | FCEUX Save State File | 450 |
| .FZB | Fritzing Bin File | 450 |
| .FZPZ | Fritzing Bundled Part File | 200 |
| .FZBZ | Fritzing Bundled Bin File | 300 |
| .FCPPROJECT | Final Cut Pro Project File | 400 |
| .FCPXDEST | Final Cut Pro Share Destination File | 400 |
| .FCARCH | Final Cut Pro Archive | 333 |
| .FLEXOLIBRARY | Final Cut Pro Library Database | 250 |
| .FST | FL Studio State File | 200 |
| .FFU | Full Flash Update Image File | 275 |
| .FTI | FamiTracker Instrument File | 400 |
| .FWTEMPLATEB | Freeway Template Bundle | 200 |
| .FWACTION | Freeway Action File | 300 |
| .FL1 | Lenovo BIOS Update File | 275 |
| .F95 | Fortran 95 Source Code File | 450 |
| .FUZ | Bethesda Softworks Voice File | 333 |
| .FGS | Fig Figure Settings File | 333 |
| .FPI | Foxit Reader Plugin | 450 |
| .FLIC | FLIC Animation | 250 |
| .FTF | FlashTool Firmware File | 200 |
| .FSA | Fragment Analysis Data File | 250 |
| .FNM | Fannie Mae 1003 Data File | 400 |
| .FLIF | Free Lossless Image Format File | 250 |
| .F4M | Adobe Flash Media Manifest File | 260 |
| .FILM | Filmkey Player Media File | 311 |
| .FDX | Food Data Exchange File | 400 |
| .FPR | Humanize Preset File | 400 |
| .FORM | PreForm Job File | 350 |
| .FIG | MATLAB Figure File | 200 |
| .FP | FinePrint File | 400 |
| .FLO | Automate Flowchart File | 200 |
| .FTC | Dream League Soccer Asset File | 350 |
| .FDF | Origin Fitting Function Definition File | 400 |
| .FIRM | Boot9Strap 3DS Firmware File | 400 |
| .FBM | Marine Vessel Model File | 400 |
| .FAR | FARO Zone File | 200 |
| .FB2K-COMPONENT | Foobar2000 Component Install File | 450 |
| .FCE | Need for Speed Mesh File | 400 |
| .FLW | Kivio Flow Chart | 400 |
| .FAQ | Frequently Asked Questions Document | 300 |
| .FAL | Bitmap Graphic Header Information | 300 |
| .FM5 | FileMaker 5 Database | 500 |
| .FP3 | FileMaker Pro 3 Database | 229 |
| .FP4 | FileMaker Pro 4 Database | 500 |
| .FMP | FileMaker Pro Database | 300 |
| .FAC | FACE Image File | 250 |
| .FACE | FACE Graphic File | 260 |
| .FBM | Fuzzy Bitmap Image | 300 |
| .FLP | Flash Project | 207 |
| .FPK | JetForm FormFlow File | 467 |
| .FXT | Finale Plug-in | 300 |
| .FRL | Electronic Form Loader File | 500 |
| .FCD | First Choice Database | 467 |
| .FCS | First Choice Spreadsheet | 400 |
| .FFF | Gravis UltraSound Sound Bank | 500 |
| .FZB | Casio FZ-1 Bank Dump | 400 |
| .FCD | FastCAD DOS Drawing | 500 |
| .FLS | ArcView GIS Windows Help Supporting File | 367 |
| .FPENC | FileProtect Encrypted File | 300 |
| .FOL | PFS First Choice Database File | 500 |
| .FFT | Final Form Text File | 500 |
| .FNTA | Aleph One Font File | 500 |
| .FT7 | FreeHand 7 Drawing Template | 500 |
| .FT8 | FreeHand 8 Template | 350 |
| .FT9 | FreeHand 9 Drawing Template | 300 |
| .FT10 | FreeHand 10 Drawing Template | 500 |
| .FFO | Adobe Photoshop File Information File | 500 |
| .FPG | Fenix Graphics Collection File | 400 |
| .FILA | Aleph One Replay File | 500 |
| .FM3 | Lotus 1-2-3 Spreadsheet Format File | 500 |
| .FID | Microsoft Catalog Indexing Service File | 300 |
| .FDT | Impromptu Function Description Table File | 500 |
| .FFD | SharePoint FFDDumper Log | 500 |
| .FFD | FATE Saved Game | 500 |
| .FQC | FAQ Creator File | 500 |
| .FFL | Fetion Emoticons Package | 500 |
| .FMT | WinRAR Format File | 300 |
| .FDA | Dawn of War Audio File | 300 |
| .FWDN | fWriter Document | 500 |
| .FFF | MAGGI Face File | 500 |
| .F3F | Crazy Machines Font File | 433 |
| .FSIF | MyLabel Designer Deluxe Data File | 467 |
| .FL3 | Flash 3D File | 300 |
| .FIMPP | FiM++ Source Code File | 300 |
| .FLG | HP System Recovery Flags File | 500 |
| .FLG | Puppy Linux Partition Flag File | 255 |
| .FH3 | FreeHand 3 Drawing File | 500 |
| .FH4 | FreeHand 4 Drawing File | 300 |
| .FH5 | FreeHand 5 Drawing File | 300 |
| .FLASH | Frictional Games Flashback File | 200 |
| .FZM | Fritzing Module File | 400 |
| .F2K | Fortran Source Code File | 300 |
| .FILM_CPK | Sega FILM Multimedia File | 300 |
| .FE_LAUNCH | FCS Express Launch File | 500 |
| .FVT | FAST Search & Transfer Video File | 500 |
| .FEA | AFDKO Feature Definitions File | 500 |