Use the Import Files task to convert:
*.wire
*.model, *.session, *.exp, *.dlv3
*.CATPart (part),, CATProduct (product) *.cgr
*.dwg
*.dxf
.igs, \ige, *iges
*.jt
*.obj
*.x_t (text), *.x_b (binary)
*.asm (assembly), *.g (Granite), *.neu (neutral), *.prt (part)
*.sat
*.prt, *.sldprt (part), *.asm, *.sldasm (assembly)
*.stp, *.ste, *.step
.stl;.stla;*.stlb
*.prt (part), *.prt (assembly)
*.3dm
This task imports files into Inventor part (.ipt), assembly (.iam), or drawing (*.idw, *.dwg) files. JT, Parasolid, IGES, STEP, NX, and SolidWorks files that contain multiple solid parts are imported as Inventor multi-body parts. To create part files from the individual bodies, use the Make Components command.