If you want to publish interactive 3D content online then Sketchfab website help us.
Also you can easily be embedded in any webpage.
The bad thing is not yet designed to display several 3D objects on a single page.
See more here.
You can also buy 3D models.
They tell us:
Find everything from low poly assets to animated rigs & digital scans for your 3D, virtual reality, and augmented reality projects. With our model inspector, what you see is what you get.
