If you're using Sketchup Free and need to convert your 3D model to the OBJ format, you're in luck! Follow these simple steps to save your Sketchup Free file as an OBJ:

Step 1: Open your Sketchup Free file and make sure your 3D model is complete and ready to be exported.

Step 2: Go to the 'File' menu and select 'Export' from the dropdown options.

Step 3: Choose '3D Model' from the export options. This will allow you to export your file in various 3D formats, including OBJ.

Step 4: Select 'OBJ' as the file format you want to save your 3D model as.

Step 5: Choose a location on your computer to save the OBJ file, and give it a name that you'll remember.

Step 6: Click 'Export' to save your Sketchup Free file as an OBJ.

That's it! You've successfully saved your Sketchup Free file as an OBJ format. Now you can use your 3D model in other 3D software or share it with others who might need it.

Remember, OBJ files are widely used in 3D modeling and can be easily imported into many 3D software programs. So, knowing how to save your Sketchup Free file as an OBJ gives you more flexibility with your 3D modeling projects.

I hope this tutorial helps you with your 3D modeling endeavors. If you found this information useful, don't forget to share it with others who might benefit from it. Happy 3D modeling!