CAD File Types
CAD (Computer-Aided Design) files may contain 2D or 3D designs. They are generated by CAD software programs, which can be used to create models or architecture plans. 2D CAD files are often referred to as drawings, while 3D files are often called models, parts, or assemblies.
Common CAD file extensions include .DWG, .DXF, .DGN, and .STL.
| Extension | File Description | Popularity |
|---|---|---|
| .123 | PCB123 Circuit Board Design | Average |
| .123c | Autodesk 123C Drawing | Uncommon |
| .123d | Autodesk 123D Drawing | Average |
| .2d | VersaCAD 2D Drawing File | Uncommon |
| .3dc | RoboCell Cell Setup File | Uncommon |
| .3dl | Sierra LandDesigner 3D File | Rare |
| .adi | AutoCAD Device-Independent Binary Plotter File | Rare |
| .adt | AutoCAD Audit Log | Uncommon |
| .afd | Alphacam Flame Drawing | Average |
| .afs | STAAD.foundation Project File | Uncommon |
| .any | AnyRail Layout Plan | Average |
| .ard | ArtiosCAD Workspace File | Average |
| .asc | LTspice Circuit Schematic File | Average |
| .asm | Solid Edge Assembly File | Average |
| .asy | LTspice Symbol File | Average |
| .att | Alphacam Lathe Tool File | Uncommon |
| .bdc | West Point Bridge Designer Design File | Uncommon |
| .bdl | CoCreate Bundle File | Average |
| .bit | Xilinx Bitstream File | Average |
| .blk | AutoCAD Block Template File | Average |
| .bmf | FloorPlan File | Uncommon |
| .brd | Cadence Allegro PCB Design File | Average |
| .cad | BobCAD-CAM File | Average |
| .cam | Gerber CAM Job File | Average |
| .catpart | CATIA V5 Part File | Common |
| .catproduct | CATIA V5 Assembly File | Common |
| .cdl | CADKEY Wireframe Design File | Average |
| .cel | MicroStation Cell Library | Uncommon |
| .cgr | CATIA Graphical Representation File | Average |
| .circuit | KTechlab Circuit Design File | Uncommon |
| .ckd | Kubotek Design Container | Uncommon |
| .cmp | Generic CADD Component File | Rare |
| .cmp | Solid Edge Wire Harness File | Uncommon |
| .cnc | CNC Machine Tool Path | Uncommon |
| .cnc | PartMaster CNC File | Average |
| .cpa | CADSTAR PCB Archive File | Average |
| .dbq | AutoCAD Query Set | Uncommon |
| .dc | DesignCAD Design File | Average |
| .dc1 | DevCad Document | Uncommon |
| .dc2 | DesignCAD 2D ASCII Drawing | Average |
| .dc2 | DevCad Cam Pro Document | Uncommon |
| .dc3 | DesignCAD 3D ASCII Drawing | Average |
| .dcd | DesignCAD Drawing | Average |
| .des | Pro/DESKTOP CAD File | Uncommon |
| .dft | Solid Edge Draft Document | Average |
| .dfx | Drafix CAD File | Average |
| .dgb | FlashCAD Drawing Database | Average |
| .dgk | Delcam 3D Model File | Average |
| .dgn | MicroStation Design File | Common |
| .dlv | CATIA 4 Export File | Average |
| .dlx | DIALux Document | Common |
| .dra | Dolphin PartMaster Drawing File | Average |
| .dra | OrCAD Drawing File | Common |
| .drg | AllyCAD Drawing File | Uncommon |
| .drwdot | SolidWorks Drawing Template | Average |
| .dsg | Control Studio Document | Uncommon |
| .dsn | OrCAD Design File | Average |
| .dst | AutoCAD Sheet Set File | Common |
| .dst | Tajima Embroidery Format | Average |
| .dwfx | Design Web Format XPS File | Average |
| .dwg | AutoCAD Drawing Database File | Very Common |
| .dws | AutoCAD Drawing Standards File | Average |
| .dwt | AutoCAD Drawing Template | Average |
| .dxe | AutoCAD Data Extraction Template | Common |
| .dxf | Drawing Exchange Format File | Very Common |
| .dxx | AutoCAD Drawing Interchange Attribute File | Average |
| .easm | eDrawings Assembly File | Average |
| .edn | EDIF Implementation Netlist File | Average |
| .edrw | SolidWorks eDrawings File | Common |
| .eqn | GAL Equation File | Uncommon |
| .ezc | AutoCAD Ecscad Components Backup File | Rare |
| .ezp | AutoCAD Ecscad Project Backup File | Uncommon |
| .fcd | FastCAD DOS Drawing | Rare |
| .fcstd | FreeCAD Document | Average |
| .fcw | FastCAD Windows Drawing | Average |
| .flx | FelixCAD Drawing | Average |
| .fnc | QuickCAM 3D CNC File | Average |
| .fz | Fritzing Project File | Average |
| .fzz | Fritzing Shareable Project File | Uncommon |
| .g | BRL-CAD Geometry File | Average |
| .gbx | Gerber PCB File | Common |
| .gcd | Generic CADD Drawing File | Average |
| .gds | Graphic Data System File | Average |
| .gsm | Graphic Description Language File | Uncommon |
| .gxc | General CADD Pro Component | Average |
| .gxd | General CADD Pro Drawing | Average |
| .hcp | HydroCAD Project File | Common |
| .hsf | HOOPS Stream Format File | Average |
| .hus | Husqvarna Embroidery File | Average |
| .iam | Inventor Assembly File | Common |
| .iba | Lectra Clothing Design Pieces File | Uncommon |
| .ics | IronCAD 3D Drawing File | Average |
| .ide | Inventor iFeature File | Average |
| .idv | Inventor Design View File | Average |
| .idw | Inventor Drawing | Common |
| .if | Procedimientos-Uno IFWin Project File | Rare |
| .ifcxml | Industry Foundation Classes XML File | Uncommon |
| .ifczip | Compessed IFC File | Uncommon |
| .igs | IGES Drawing File | Common |
| .ipf | iMPACT Project File | Average |
| .ipj | Inventor Project File | Average |
| .ipn | Inventor Presentation File | Average |
| .ipt | Inventor Part File | Common |
| .ise | Xilinx ISE Project | Average |
| .jam | Jam STAPL File | Average |
| .jbc | Jam STAPL Byte-Code File | Common |
| .job | MetaCAM Nest Job File | Uncommon |
| .jt | JT Open CAD File | Average |
| .jvsg | Video Surveillance Project | Average |
| .kit | 20-20 Design File | Average |
| .lcf | ArchiCAD Library Container File | Average |
| .ldr | LDraw Model File | Average |
| .ldt | Eulumdat Formatted Luminaire Data File | Common |
| .lin | AutoCAD Linetype File | Average |
| .mc9 | Mastercam 9 Geometry File | Average |
| .mcd | MiniCAD Design File | Average |
| .mcx | MICRO CADAM-X/6000 Model Data File | Average |
| .mdl | Lectra Modaris Clothing Design File | Uncommon |
| .mhs | Xilinx XPS Hardware Specification File | Average |
| .model | CATIA 3D Model FIle | Average |
| .mp10 | Multisim 10 Project File | Uncommon |
| .mp11 | Multisim 11 Project File | Average |
| .mp7 | Multisim 7 Project File | Uncommon |
| .mp9 | Multisim 9 Project File | Uncommon |
| .ms11 | Multisim 11 Circuit Design File | Average |
| .ms7 | Multisim 7 Circuit Design File | Uncommon |
| .ms9 | Multisim 9 Circuit Design File | Uncommon |
| .mvs | Microchip Verification Specification File | Uncommon |
| .nc | Mastercam Numerical Control File | Common |
| .neu | Pro/ENGINEER Neutral File | Average |
| .ngc | Xilinx Generated Netlist File | Average |
| .ngd | Xilinx Netlist File | Average |
| .npl | Xilinx ISE 5-6 Project File | Uncommon |
| .nwc | Navisworks Cache File | Average |
| .nwd | Navisworks Document | Common |
| .nwf | Navisworks File Set | Common |
| .olb | OrCAD Symbol Library File | Uncommon |
| .opj | OrCAD Project File | Average |
| .opt | Opterecenja File | Rare |
| .pc6 | PowerCADD 6 Drawing File | Average |
| .pc7 | PowerCADD 7 Drawing File | Average |
| .pho | Gerber Photoplot File | Average |
| .pla | ArchiCAD Project Archive | Average |
| .pln | ArchiCAD Project File | Common |
| .pm3 | Crouzet Logic Software M3 File | Rare |
| .prg | PC-DMIS Part Program File | Average |
| .prt | Pro/ENGINEER Part File | Common |
| .prt | Solid Edge Part File | Average |
| .prt | Unigraphics Part File | Average |
| .psf | AutoCAD PostScript Patterns File | Uncommon |
| .psm | Solid Edge Sheet Metal File | Average |
| .pss | AutoCAD Plot Stamp Settings File | Uncommon |
| .psu | PSU Designer Document | Rare |
| .pwd | Solid Edge Weldment Document | Average |
| .pwt | AutoCAD Publish To Web Template | Average |
| .red | CADViewer Redline Markup File | Uncommon |
| .rml | Redline Markup Language File | Average |
| .sab | ACIS SAB Model File | Average |
| .sat | ACIS SAT Model File | Average |
| .sbp | OpenSBP CNC Program File | Average |
| .scad | OpenSCAD Script | Average |
| .sdg | Strater Project File | Average |
| .sew | Home Embroidery Format | Uncommon |
| .shx | AutoCAD Compiled Shape File | Common |
| .skf | AutoSketch Drawing | Average |
| .sldasm | SolidWorks Assembly File | Average |
| .slddrw | SolidWorks Drawing File | Average |
| .sldprt | SolidWorks Part File | Average |
| .spt | SpeedTree Tree Data File | Average |
| .stl | Stereolithography File | Common |
| .svd | SolidView Design File | Uncommon |
| .t3001 | TARGET 3001! Circuit Design Project File | Average |
| .tak | TAK 2000 Thermal Model File | Rare |
| .tbp | Tekla BIMsight Project | Average |
| .tc2 | TurboCAD 2D Mac Drawing | Average |
| .tc3 | TurboCAD 2D/3D Mac Drawing | Average |
| .tcd | Technobox CAD Drawing | Average |
| .tcm | TurboCAD Mac Drawing | Average |
| .tct | TurboCAD Drawing Template | Average |
| .tcw | TurboCAD Drawing File | Common |
| .tcx | TurboCAD 3D Model Text File | Uncommon |
| .top | TopSolid Design Document | Average |
| .topprj | TopSolid Project File | Uncommon |
| .topviw | TopSolid'Viewer Document | Average |
| .tsf | Strater Template File | Uncommon |
| .unt | AutoCAD Unit Definition File | Uncommon |
| .upf | Unified Power Format File | Uncommon |
| .vet | Lectra Cutter's Must File | Uncommon |
| .vnd | Type3 Design File | Uncommon |
| .vtf | 3DESIGN CAD File | Average |
| .vwx | VectorWorks 2008 Design File | Average |
| .wdp | AutoCAD Electrical Project File | Average |
| .xise | Xilinx ISE Project File | Common |
| .xv3 | Lattice XVL Geometry File | Average |
| .x_b | Parasolid Model Part File | Average |
| .x_t | Parasolid Model Part File | Average |