Open 0xr.space in Chrome, Edge, Safari or Firefox on the computer, press Open and choose the file. The model turns slowly until you touch it. Drag with the mouse to turn it, and use the scroll wheel or a two-finger trackpad scroll to scale it. On a touch screen, pinch to scale and drag two fingers to slide it. Press Esc or the × to close the viewer.
Files can also be dragged onto Home or the viewer: a Drop to open sheet appears, and a file, a ZIP or a whole folder opens as it would from Open. There is no pan with the mouse, only on a touch screen. Auto-rotate, under More on the dock, keeps the model turning at 12 degrees a second, a full turn every 30 seconds, and pauses while you handle it. A computer shows the model on screen; for a room, use Send to your headset.
Yes. Drag files, a ZIP or a whole folder onto Home or the viewer; Drop to open appears, and they open the way Open would, missing-file checks included.
With two fingers on a touch screen. The mouse turns and scales the model but does not slide it.
Touch it once. If Auto-rotate is on under More, turn it off there.
No. It is read in the browser, and nothing is sent to a server unless you create a share link or press Send to your headset.