What is better to choose for displaying 3D models in the browser?

Question

WebGL

Good day.
There was a task of displaying 3D models in the browser. Models are all initially made in AutoCAD. But they can be recycled in another.
If any opensource version of the normal display of 3D models in the browser and in the mobile version?
There are several services that solve this issue, display, etc., but unfortunately I cannot use them in the project.

Answer 1

Tree.js can do it
Here is a very old example - through-the-interface.typepad.com/through_the_inte... (probably still works)