Virtual Walkthrough in web?

I’ve been given the task of learning to create a virtual walkthrough for a client that is building a showroom.
I’d preferably like to give the client a link to view it or be able to send it as a file and the client be able to view it without downloading any software.

I’ve already modeled and textured the showroom.

Any help with achieving this goal will be greatly appreciated!

There are 3D libraries that let you add an interactive 3D scene to a website. ThreeJs is a really good one that’s easy to use, look up some tutorials and you’ll be going in no time