A website called IGES to SVG converter (see links) offers users quick and efficient way to transform their IGES 3D graphics to SVG format. Other than that, you have to rely on some of the 3D modeling / CAD tools for this conversion.
Convert IGES 3D exchange format to XML based scalable vector graphics format.
We found 2 software records in the database related to .igs to .svg file format conversion.
Multiplatform software - convert igs to svg on any platform
An open source multiplatform 3D CAD/MCAD/CAx/CAE/PLM modeler
Convert from igs file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned igs to svg. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
On-line services software - convert igs to svg on web
A convert for 3D graphics accessible from web browser