.skp to .3ds (78704)

Does anyone have a free service, preferably an online one, that would allow me to convert .skp files, which are not supported by Unity, to .3ds files. I know about Babel3d, but I don’t want to give my credit card number away to “free” services.

http://3doc.i3dconverter.com/

I can’t support directly the Google SketchUp .skp file format in my program, because it is a totally unpublished ones.

I did find a way how to convert the .skp files to other format(s):

  1. Please install the Kertythea export plugin under Google Sketchup
    http://www.i3dconverter.com/external_programs/su2kt2_21.zip
  2. Open your .skp file with Google Sketchup.
  3. Export your object using the Plugins/Kertythea Exporter/Export model menuitem
  4. Open the exported .xml file with 3D Object Converter
  5. Export your object to other format you would like to use