How to open a .glb or .gltf file in blender? My question is about opening .glb or .gltf files in Blender. I don't see these extensions in the Import options, although Export allows me to create files with either of those extensions.
Blender comes with glTF-Blender-IO pre-installed since 2.80.

This is a refactoring of the original Khronos glTF exporter, combined with @Julien's importer.  Both of the original projects should be considered obsolete in favor of the newer, combined glTF-Blender-IO project.

The Blender Manual includes documentation on ways to use glTF.