The following file extensions are currently supported as input formats: 3d, 3ds, fbx, ac, ac3d, acc, ase, ask, b3d, blend, bvh, cob, csm, dae, dxf, enff, hmp, ifc, irr, irrmesh, lwo, lws, lxo, md2, md3, md5anim, md5camera, md5mesh, mdc, mdl, mesh.xml, mot, ms3d, ndo, nff, obj, off, pk3, ply, prj, q3o, q3s, raw, scn, smd, stl, ter, uc, vta, x, xml, xgl
Supported export formats are: stl, stlb, collada, obj, 3ds, ply, json, x
For more information, please see the list of file formats supported by Open Asset Import Library, which is the software that we use internally.