Great news from the Sketchfab team.
The Sketchfab team announced that every single downloadable model on their market is now available in the USDZ format (developed by Apple and Pixar). You can use both free Creative Commons licensed models and royalty-free models on the Sketchfab Store.
Over 400,000 USDZ files are now available which makes Sketchfab the largest library of USDZ files. "Additionally, if you are a subscriber to Sketchfab Pro or above all your own models are also now privately available to you for download in this format too," noted the team.
The team states that any model that is added to the Store or set for free download on Sketchfab will be automatically converted to USDZ, so it's now easier than ever to convert all major 3D file formats to this format.
You can learn more here.