It actually might be possible to export some views from SolidWorks assembly files (.sldasm) and save them as JPEG (.jpg, .jpeg) or PNG (.png) pictures for previewing purposes. This means that sldasm to jpg conversion is not actually conversion in a proper sense, just a preview export. This can be probably done in lots of programs with SolidWorks format supports.
Open SLDASM file Open JPG fileA 3D product data optimalization software
A 3D CAD translation software