| .DAZ | DAZ 3D | 3D-billedfiler | DAZ Studio 3D Scene | DAZ Studio | DAZ 3D |
| .DBC | Microsoft Corporation | 3D-billedfiler | FoxPro Database File | Microsoft Visual FoxPro | Microsoft Corporation |
| .DBL | Microsoft Corporation | 3D-billedfiler | Microsoft Windows XP Product Activation Data | Windows XP | Microsoft Corporation |
| .DBM | Adobe Systems Incorporated | 3D-billedfiler | ColdFusion Server File | MacroMates TextMate | MacroMates |
| .DBO | The Game Creators | 3D-billedfiler | DarkBASIC Object | The Game Creators DarkBASIC Pro | The Game Creators |
| .DDD | Alpha Software | 3D-billedfiler | Alpha Five Data Dictionary File | Alpha Anywhere - Alpha Software | Alpha Software |
| .DFF | Zanoza Software | 3D-billedfiler | RenderWare Model File | Zanoza ZModeler | Zanoza Software |
| .DFS | Open Source | 3D-billedfiler | BrainSuite Surface File | BrainSuite | Open Source |
| .DGL | GipsyMedia Ltd | 3D-billedfiler | DigiGuide Language Data | DigiGuide | GipsyMedia Ltd |
| .DICM | Pierre-Emmanuel Gougelet | 3D-billedfiler | DICOM Medicine Picture | XnView MP | XnSoft |
| .DIF | Microsoft Corporation | 3D-billedfiler | Data Interchange Format | Microsoft Excel | Microsoft Corporation |
| .DIM | Active@ Data Recovery Software | 3D-billedfiler | Active@ Raw Disk Image Backup File | Active@ Disk Image | LSoft Technologies Inc. |
| .DM | Sony Mobile Communications | 3D-billedfiler | DRM Delivery Message | DRM Packager | Sony Mobile Communications |
| .DMC | nModal Solutions Inc. | 3D-billedfiler | Datamartist Data Canvas File | nModal Solutions Datamartist | nModal Solutions Inc. |
| .DMK | Various Developers | 3D-billedfiler | Digimask File | Microsoft XBOX | Microsoft Corporation |
| .DPC | Microsoft Corporation | 3D-billedfiler | Microsoft Office Resource File | Microsoft Office | Microsoft Corporation |
| .DPD | David Pilling | 3D-billedfiler | Ovation Pro File | Ovation Pro Reader | David Pilling |
| .DPJ | Delft Spline Systems | 3D-billedfiler | DeskProto Project | DeskProto | Delft Spline Systems |
| .DR | Sony Mobile Communications | 3D-billedfiler | DRM Rights Object | DRM Packager | Sony Mobile Communications |
| .DS | DAZ 3D | 3D-billedfiler | DAZ Studio 1/2 Script | DAZ Studio | DAZ 3D |
| .DS4 | Corel | 3D-billedfiler | Micrografx Designer Graphic File | Micrografx Designer 7 | Corel |
| .DSA | DAZ 3D | 3D-billedfiler | DAZ Studio 3+ Script | DAZ Studio | DAZ 3D |
| .DSD | Autodesk, Inc. | 3D-billedfiler | AutoCAD Drawing Set Description File | Autodesk AutoCAD | Autodesk, Inc. |
| .DSE | DAZ 3D | 3D-billedfiler | DAZ Studio Encrypted Script | DAZ Studio | DAZ 3D |
| .DSF | DAZ 3D | 3D-billedfiler | DAZ Studio Asset File | DAZ Studio | DAZ 3D |
| .DSI | DAZ 3D | 3D-billedfiler | DAZ Studio Layered Image Set | DAZ Studio | DAZ 3D |
| .DSO | Microsoft Corporation | 3D-billedfiler | Microsoft Visual Studio Workspace Data | Microsoft Visual Studio | Microsoft Corporation |
| .DSV | Open Source | 3D-billedfiler | DeSmuME Saved Game File | DeSmuME | Open Source |
| .DSX | DAZ 3D | 3D-billedfiler | DAZ Studio XML File | DAZ Studio | DAZ 3D |
| .DTM | Prodatron | 3D-billedfiler | DigiTrakker Audio Module | CocoModX | Open Source |
| .DUF | DAZ 3D | 3D-billedfiler | DAZ User File | DAZ Studio | DAZ 3D |
| .DWF | Autodesk, Inc. | 3D-billedfiler | Autodesk Design Web Format File | ACD Systems Canvas | Microsoft Corporation |
| .E3D | Macromedia | 3D-billedfiler | Macromedia Extreme 3D Object | Macromedia Extreme 3D | Macromedia |
| .E57 | ASTM E57 Committee on 3D Imaging Systems | 3D-billedfiler | LIDAR Point Cloud Data File | FARO Scene | FARO Technologies, Inc. |
| .ECF | Microsoft Corporation | 3D-billedfiler | Outlook Add-in | Microsoft Outlook | Microsoft Corporation |
| .EGG | ESTsoft | 3D-billedfiler | ALZip Archive | The Unarchiver | Dag Agren, Circlesoft |
| .EIL | Cadsoft | 3D-billedfiler | Eagle Library Intermediate Data | CadSoft EAGLE | Autodesk, Inc. |
| .F3D | Autodesk, Inc. | 3D-billedfiler | Fusion 3D Design | Autodesk Fusion 360 | Autodesk, Inc. |
| .F3Z | Autodesk, Inc. | 3D-billedfiler | Fusion 360 Distributed Design File | Autodesk Fusion 360 | Autodesk, Inc. |
| .F4M | Adobe Systems Incorporated | 3D-billedfiler | Adobe Flash Media Manifest File | Adobe Media Server | Adobe Systems Incorporated |
| .FACT | EIAS3D | 3D-billedfiler | EIAS ElectricImage 3D File | Electric Image Animation System (EIAS) | EIAS3D |
| .FAQ | The Document Foundation | 3D-billedfiler | Frequently Asked Questions Document | LibreOffice | The Document Foundation |
| .FBM | Michael Loren "Fuzzy" Mauldin | 3D-billedfiler | Fuzzy Bitmap Image | Graphics Converter Pro | Newera Software Technology, Inc. |
| .FC2 | Smith Micro Software | 3D-billedfiler | Poser Face Pose File | Smith Micro Poser | Smith Micro Software |
| .FCD | Smart Projects | 3D-billedfiler | Virtual CD Format | IsoBuster | Smart Projects |
| .FCX | Patton & Patton Software | 3D-billedfiler | Flow Charting Diagram File | Flow Charting | Patton & Patton Software |
| .FIG | Open Source | 3D-billedfiler | Xfig Drawing | Winfig | Andreas Schmidt |
| .FLD | Open Source | 3D-billedfiler | YSFLIGHT Field File | YSFlight | Open Source |
| .FLT | Presagis | 3D-billedfiler | OpenFlight Scene Description File | ESRI ArcGIS for Desktop | ESRI (Environmental Systems Research Institute) |
| .FNC | E-on Software, Inc. | 3D-billedfiler | Vue Functions File | E-on Vue | E-on Software, Inc. |
| .FP | FileMaker Inc. | 3D-billedfiler | FileMaker Pro Spreadsheet | FileMaker Pro | FileMaker Inc. |
| .FP3 | Fast Report | 3D-billedfiler | FastReport Prepared Report File | Fast Report Viewer | Fast Report |
| .FPF | Inter IKEA Systems B.V. | 3D-billedfiler | IKEA Home Planner File | IKEA Home Planner | Inter IKEA Systems B.V. |
| .FPT | Sage | 3D-billedfiler | ACT! Data File | Act! | Swiftpage, Inc. |
| .FR4 | Sirotinsky Arthur and Olga Fedorenko | 3D-billedfiler | Fractal Explorer Quaternion Spot | Fractal Explorer | Sirotinsky Arthur and Olga Fedorenko |
| .FRC | Dovetail Games | 3D-billedfiler | FS Recorder File | FS Recorder | Unknown Developer |
| .FSH | OpenGL | 3D-billedfiler | Fragment Shader File | OpenGL SDK | OpenGL |
| .FUN | 3D Systems | 3D-billedfiler | Cubify Invention File | Cubify Invent | 3D Systems |
| .FVS | Forest Management Service Center (FMSC) | 3D-billedfiler | Forest Vegetation Simulator | Forest Vegetation Simulator | Forest Management Service Center (FMSC) |
| .FX | Microsoft Corporation | 3D-billedfiler | Direct3D Effects File | Microsoft Visual Studio | Microsoft Corporation |
| .FXM | pmG Worldwide | 3D-billedfiler | MessiahStudio Motion File | pmG messiahStudio | pmG Worldwide |
| .FXS | pmG Worldwide | 3D-billedfiler | MessiahStudio Scene File | pmG messiahStudio | pmG Worldwide |
| .FXT | Rockstar Games | 3D-billedfiler | Grand Theft Auto Fake Text File | Sanny Builder | Open Source |
| .G4 | Microsoft Corporation | 3D-billedfiler | Microsoft Access Image Format | Microsoft Access | Microsoft Corporation |
| .GDD | Altium | 3D-billedfiler | Gerber Drill Drawing Data | Altium Designer | Altium |
| .GDF | Eytan Adar | 3D-billedfiler | GUESS Graph Data Format File | GUESS | Eytan Adar |
| .GEO | Redway3d and others | 3D-billedfiler | VRML Geography File | TurboCAD | IMSI/Design, LLC |
| .GLB | Analytical Graphics | 3D-billedfiler | STK Globe File | Systems Tool Kit (STK) | Analytical Graphics |
| .GLF | Vladimir Romanyuk | 3D-billedfiler | Space Engine Shader File | Space Engine | Vladimir Romanyuk |
| .GLM | Raven software | 3D-billedfiler | Ghoul 2 Model File | CADSoftTools ABViewer | CADSoftTools |
| .GLTF | Trimble Inc. | 3D-billedfiler | GL Transmission Format File | 3D Warehouse | Trimble Inc. |
| .GMF | Leadwerks Software | 3D-billedfiler | Leadwerks Game Model File | Leadwerks Game Engine | Leadwerks Software |
| .GMMOD | YoYo Games | 3D-billedfiler | Game Maker 3D Model File | Model Creator for Game Maker | Open Source |
| .GMT | Image Space Incorporated | 3D-billedfiler | rFactor Model File | Zanoza ZModeler | Zanoza Software |
| .GRY | XnSoft | 3D-billedfiler | Grayscale Image | XnView MP | XnSoft |
| .GTX | Spiral Graphics Inc. | 3D-billedfiler | Genetica Seamless Texture Format | Genetica | Spiral Graphics Inc. |
| .GWP | Microsoft Corporation | 3D-billedfiler | Greetings Workshop Project File | Microsoft Greetings Workshop | Microsoft Corporation |
| .HD2 | Smith Micro Software | 3D-billedfiler | Poser Hand Pose File | Poser | Smith Micro Software |
| .HDRU | Pierre-Emmanuel Gougelet | 3D-billedfiler | Apollo HRDU Image Format | XnView MP | XnSoft |
| .HEB | Unknown Developer | 3D-billedfiler | DEcomp 3D Scene Data | DEcomp | Unknown Developer |
| .HIA | PHD Computer Consultants | 3D-billedfiler | Spy-CD Database | Spy-CD | PHD Computer Consultants |
| .HIP | SideFX | 3D-billedfiler | Houdini Project File | Side Effects Houdini | SideFX |
| .HLSL | Microsoft Corporation | 3D-billedfiler | High Level Shader Language File | Microsoft Visual Studio | Microsoft Corporation |
| .HOB | MicroProse Software | 3D-billedfiler | Star Trek: Birth Of The Federation Ship Graphic | Star Trek: Birth of the Federation | MicroProse Software |
| .HR2 | Smith Micro Software | 3D-billedfiler | Poser Hair File | Smith Micro Poser | Smith Micro Software |
| .HVD | HoverDesk.net | 3D-billedfiler | HoverDesk Theme File | HoverDesk | HoverDesk.net |
| .HVE | Piotr Byszewski | 3D-billedfiler | Hive Editor 3D Environment | Hive Editor | Piotr Byszewski |
| .HVS | Dream 3D | 3D-billedfiler | Cubicon Cubicreator G-code Data | Cubicon Cubicreator | Dream 3D |
| .HVX | NewTek | 3D-billedfiler | LightWave 3D Hypervoxel | LightWave 3D | NewTek |
| .HX | Thermo Fisher Scientific Inc. | 3D-billedfiler | Amira 3D Mesh File | Amira | Thermo Fisher Scientific Inc. |
| .IFC | buildingSMART | 3D-billedfiler | Industry Foundation Classes File | ARCHICAD | Graphisoft |
| .IGES | Redway3d and others | 3D-billedfiler | IGES Exchange Format | Autodesk Fusion 360 | Autodesk, Inc. |
| .IGM | Glare Technologies Limited | 3D-billedfiler | Indigo Renderer Material File | Indigo Renderer | Glare Technologies Limited |
| .IGS | United States Air Force | 3D-billedfiler | Initial Graphics Exchange Specification Drawing File | SOLIDWORKS | Dassault Systèmes |
| .IIB | IBM | 3D-billedfiler | IBM Lotus Notes Data | IBM Lotus Notes | IBM |
| .IV | Open Source | 3D-billedfiler | Open Inventor Scene Graph File | Golden Software Voxler | Golden Software LLC |
| .IVE | Open Source | 3D-billedfiler | OpenSceneGraph Binary File | OpenSceneGraph | Open Source |
| .IWI | Activision | 3D-billedfiler | Infinity Ward Texture File | Activision Call of Duty 2 | Activision |
| .J2A | Epic Games | 3D-billedfiler | Jazz Jackrabbit 2 Animation Data | Jazz Jackrabbit 2 | Epic Games |
| .J2S | Epic Games | 3D-billedfiler | Jazz Jackrabbit 2 Language Data | Jazz Jackrabbit 2 | Epic Games |
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