NavisWorks - .nwd, .nwf, .nwc (all versions, no full backward compatibiliy) AutoCAD Drawing - .dwg, .dxf (up to AutoCAD 2018) MicroStation (SE, J, V8, & XM) - .dgn, .prp, prw (up to v7, & v8) 3D Studio Max - .3ds, .prj (up to 3ds Max 2018) ACIS SAT - .sat, .sab (all ASM SAT, up to ASM SAT v7) DWF - .dwf, .dwfx (all versions) CATIA - .model, session, .exp, dlv3, .CATPart, .CATProduct, .cgr (up to v4, & v5) IFC - .ifc (IFC2X_PLATFORM, IFC2X_FINAL, IFC2X2_FINAL, IFC2X3, IFC4) IGES - *.igs*, *.iges* (all versions) Informatix/MicroGDS - .man, .cv7 (v10) Inventor - .ipt, .iam, .ipj (up to Inventor 2018) CIS/2 - .stp (STRUCTURAL_FRAME_SCHEMA) JT Open - .jt (up to v10) NX - .prt (up to v9) Revit - .rvt (up to 2011-2018) RVM - .rvm (up to v12.0 SP5) SketchUp - .skp (v5 up to 2015) PDS Design Review - .dri (legacy file format, support up to 2007) STL - .stl (binary only) VRML - .wrl, .wrz (VRML1, VRML2) Parasolid - .x_b (up to schema 26) FBX - .fbx (FBX SDK 2017) Pro/ENGINEER - .prt, .asm, .g, .neu (Wildfire v5, Creo Parametric v1-v3) STEP - .stp, .step (AP214, AP203E3, AP242) Solidworks - .prt, .sldprt, .asm, .sldasm (2001, plus 2015) PDF - .pdf (all versions) Rhino - .3dm (up to v5) Solid Edge - .stp, .prt