A website called IGES to SVG converter (see links) offers users quick and efficient way to transform their IGES 3D graphics to SVG format. Except for that, you will have have to rely on some of the 3D modeling / CAD tools for such igs to svg conversion or export.
Open IGS file Open SVG fileAn open source multiplatform 3D CAD/MCAD/CAx/CAE/PLM modeler
A convert for 3D graphics accessible from web browser