/ Choose Spline - 3D Design tool in the browser with real-time collaboration if
Its stated focus matches what you need: Spline is a free 3D design software with real-time collaboration to create web interactive experiences in the browser. Easy 3d modeling, animation, textures, and more.
/ Choose Publish 3D models online with ease if
Its stated focus is closer to your workflow: Upload your 3D model and instantly get a custom web page to share or embed within a website. No coding required, no sign up required, free to use.