If you're using SketchUp Free and want to export your models in OBJ format, you might be wondering how to go about it. While the free version of SketchUp doesn't directly support OBJ export, there is a workaround that allows you to save your models in OBJ format.

Here's a step-by-step guide on how to save your SketchUp Free files as OBJ:

1. Install the SketchUp Free OBJ Exporter Plugin: To enable OBJ export in SketchUp Free, you'll need to install a third-party plugin that adds OBJ export functionality to the software. There are several plugins available online that are designed specifically for exporting SketchUp models as OBJ files. Once you've found a suitable plugin, follow the installation instructions to add it to your SketchUp Free installation.

2. Export Your Model as OBJ: With the OBJ exporter plugin installed, you can now export your SketchUp Free models as OBJ files. To do this, simply open the model you want to export in SketchUp Free, then navigate to the plugin's export menu and select the OBJ format. Follow the on-screen prompts to specify the export settings and save the OBJ file to your computer.

3. Check the OBJ File: After exporting your model as an OBJ file, it's a good idea to check the file in a 3D modeling software such as Blender or Autodesk Maya to ensure that the export was successful. Open the OBJ file in your chosen 3D modeling software and verify that the model is intact and correctly formatted.

By following these steps, you can save your SketchUp Free files as OBJ format for use in 3D modeling, game development, animation, and other applications. While SketchUp Free doesn't natively support OBJ export, the availability of third-party plugins makes it possible to export your models in OBJ format with relative ease.