You can also import and export 3D models in many different file formats in order to reuse them in your favorite tool or engine — Sketchfab can convert files for you.

Sketchfab, the browser-based platform for sharing and viewing 3D models, has announced a new feature on their software that turns any of their models into a virtual reality experience when viewed ...

Avoid high density models and always try to optimize. You want your Sketchfab model to run smoothly on most computers and also it is easier to unwrap later on.