| .F3D | Autodesk, Inc. | 3D-bildefiler | Fusion 3D Design | Autodesk Fusion 360 | Autodesk, Inc. |
| .F3Z | Autodesk, Inc. | 3D-bildefiler | Fusion 360 Distributed Design File | Autodesk Fusion 360 | Autodesk, Inc. |
| .F4M | Adobe Systems Incorporated | 3D-bildefiler | Adobe Flash Media Manifest File | Adobe Media Server | Adobe Systems Incorporated |
| .FACT | EIAS3D | 3D-bildefiler | EIAS ElectricImage 3D File | Electric Image Animation System (EIAS) | EIAS3D |
| .FAQ | The Document Foundation | 3D-bildefiler | Frequently Asked Questions Document | LibreOffice | The Document Foundation |
| .FBM | Michael Loren "Fuzzy" Mauldin | 3D-bildefiler | Fuzzy Bitmap Image | Graphics Converter Pro | Newera Software Technology, Inc. |
| .FC2 | Smith Micro Software | 3D-bildefiler | Poser Face Pose File | Smith Micro Poser | Smith Micro Software |
| .FCD | Smart Projects | 3D-bildefiler | Virtual CD Format | IsoBuster | Smart Projects |
| .FCX | Patton & Patton Software | 3D-bildefiler | Flow Charting Diagram File | Flow Charting | Patton & Patton Software |
| .FIG | Open Source | 3D-bildefiler | Xfig Drawing | Winfig | Andreas Schmidt |
| .FLD | Open Source | 3D-bildefiler | YSFLIGHT Field File | YSFlight | Open Source |
| .FLT | Presagis | 3D-bildefiler | OpenFlight Scene Description File | ESRI ArcGIS for Desktop | ESRI (Environmental Systems Research Institute) |
| .FNC | E-on Software, Inc. | 3D-bildefiler | Vue Functions File | E-on Vue | E-on Software, Inc. |
| .FP | FileMaker Inc. | 3D-bildefiler | FileMaker Pro Spreadsheet | FileMaker Pro | FileMaker Inc. |
| .FP3 | Fast Report | 3D-bildefiler | FastReport Prepared Report File | Fast Report Viewer | Fast Report |
| .FPF | Inter IKEA Systems B.V. | 3D-bildefiler | IKEA Home Planner File | IKEA Home Planner | Inter IKEA Systems B.V. |
| .FPT | Sage | 3D-bildefiler | ACT! Data File | Act! | Swiftpage, Inc. |
| .FR4 | Sirotinsky Arthur and Olga Fedorenko | 3D-bildefiler | Fractal Explorer Quaternion Spot | Fractal Explorer | Sirotinsky Arthur and Olga Fedorenko |
| .FRC | Dovetail Games | 3D-bildefiler | FS Recorder File | FS Recorder | Unknown Developer |
| .FSH | OpenGL | 3D-bildefiler | Fragment Shader File | OpenGL SDK | OpenGL |
| .FUN | 3D Systems | 3D-bildefiler | Cubify Invention File | Cubify Invent | 3D Systems |
| .FVS | Forest Management Service Center (FMSC) | 3D-bildefiler | Forest Vegetation Simulator | Forest Vegetation Simulator | Forest Management Service Center (FMSC) |
| .FX | Microsoft Corporation | 3D-bildefiler | Direct3D Effects File | Microsoft Visual Studio | Microsoft Corporation |
| .FXM | pmG Worldwide | 3D-bildefiler | MessiahStudio Motion File | pmG messiahStudio | pmG Worldwide |
| .FXS | pmG Worldwide | 3D-bildefiler | MessiahStudio Scene File | pmG messiahStudio | pmG Worldwide |
| .FXT | Rockstar Games | 3D-bildefiler | Grand Theft Auto Fake Text File | Sanny Builder | Open Source |
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