Big news for our SketchUp users: thanks to Alex Schreyer, we now have a plugin to export 3D models directly form SketchUp to Sketchfab. The plugin adds a menu item “Upload to Sketchfab” to the File menu in SketchUp. All you need to do before you can upload your models is register on Sketchfab.com and get your private API key. You can find it on your dashboard, once you have filed in your email address. Once the plugin is installed, it just takes 1 click to publish from SketchUp to Sketchfab! Here is a little video demo:
For current SketchUp version: download the SketchUp-to-Sketchfab exporter v 1.3 (.rbz)
Download the RBZ file. Then open SketchUp (v.8 M2 and above) and go to the Preferences dialog. On the Extensions tab, select "Install Extension..." and browse to the file.
For older SketchUp version: download the SketchUp-to-Sketchfab exporter v 1.3 (.zip)
Download the ZIP file and unzip it into the SketchUp plugin directory (usually at C:\Program Files\Google\SketchUp\Plugins\ in Windows or /Library/Application Support/Google SketchUp/SketchUp/Plugins/ on the mac). Keep the folder structure as it is in the ZIP file. Then re-start SketchUp and look for the new menu item in the File menu. If you are updating, just overwrite the old version of this plugin.
Credit: many thanks again to Alex Schreyer for making this possible.