Save As Read-Only

Hello, community! Is there a way to save an SKP file for viewing only? Thank you!

No but if you have a current subscription to SketchUp you can upload it to your Trimble Connect account and send a link to others so they can view the model in the online Viewer.

If you share via Trimble Connect, you have a few options, you can set an expiration date, choose to view only in a browser (computer, tablet, iphone or hololens) view and download.(it downloads as an a normal skp, though)
Even specify which version if you have more than one.

Bonus, the recipient can measure in the viewer and make remarks.
You’ll be notified if downloaded or viewed and you can revoke, too.