I think we don't need to reinvent the wheel. I know the simple and useful online file converter here I think more people will use this tool because it really helps. What else services do you know?

like Java ones are not necessary for a plug-in to work.

This method will work correctly?

Could there have been an update in your system that speeds up Sweet Home 3D?

How to reduce the size of the plug-in (12 MB) to speed up uploading?