Open the GLB at 0xr.space, then on Home open the three-dot menu on its card and press Download USDZ. The USDZ is written on your device the way AR Quick Look reads one, in metres, so an iPhone, iPad or Apple Vision Pro shows it at its size, with base colour, metallic, roughness, normal, occlusion and emissive maps and transparency. Downloading needs an account, made with your email address and a 6-digit code.
Animation is left out and a rigged model is written at rest. Points, lines and vertex colours are dropped, the part tree is flattened, and clearcoat, sheen and transmission are not carried over. WebP and AVIF textures are redrawn as PNG; KTX2 ones are left out, and the notice counts them. Splats cannot be downloaded.
No. A USDZ from here holds the model at rest. Quick Look shows it still, at its size.
Those textures are KTX2, which cannot be redrawn as PNG here, or were missing from the model. The materials that used them keep their colour and other values.
Yes, for a model that knows its unit: the USDZ is in metres, so Quick Look places it at the size the file gives. An OBJ has no unit and is written as if its numbers were metres.
Yes. Open the .usdz the same way and press Download GLB on its card.
No. The USDZ is written in the browser from the copy on your device, and nothing is sent to a server unless you create a share link yourself.