GLB

GLB is a single binary file containing a 3D model's geometry, materials, textures and animations. It is the packaged form of glTF, the open format the Khronos Group publishes, and it is what web viewers and Android's Scene Viewer load.

Its advantages are practical. One file to serve, a compact size, materials described in a way every renderer agrees on, and optional compression for the geometry. A product page that shows 3D almost certainly loads a GLB. Our free 3D model checker reads a GLB in your browser and says whether it is ready for a product page. A GLB that is too heavy can be made smaller with our free GLB compressor.

Its limit is Apple. iPhone and iPad AR use USDZ instead, so a production pipeline exports both from the same source model.