Export interior to Sketchfab?

I have an art gallery I created for an art center. The users are not going to be computer savvy, and dealing with installing Exe’s and downloading is making me nervous. Looking at Sketchfab, they have that viewer that can maneuver around and inside of interiors. My level is basically a large room with four walls and paintings on the walls. Does anyone know of the best way or tutorial on how I might export that into Sketchfab? Is that even possible? A preliminary look through tutorials doesn’t come up with anything specific to this method of deployment. Thanks.