We advise you to export your 3D file from your 3D software into one of the supported formats. You can also use the 3D software in free download: Meshlab
You can upload a 3D file in any of the following formats: .3DM (Rhino), .3DS (3D Studio), .3MF, .AC3D, .ASE (3D Studio), .CATPART, .CATPRODUCT, .CGR (CATIA), .COB (TrueSpace), .DAE (Collada), .DXF (AutoCAD), .IAM / .IPT (Autodesk Inventor), .IGES / .IGS, .KMZ (Google Earth), .LWO (LightWave), .MD2/MD3 (Quake), .OFF, .PLY (Stanford), .PRC, .Q3O (Quick3D), .RAR, .SAT, .SCAD (OpenSCAD), .SKP (Sketchup 2008 or before), .SLDPRT, .SLDASM (SolidWorks), .STEP (ISO 10303), .TGZ, .U3D, .VRML, .X_T (Parasolid), .ZIP