GLB is the single-file binary version of glTF, the open standard for 3D on the web. It packs geometry, materials and textures into one compact file that browsers, Android AR and most viewers load directly.
Full name
glTF 2.0 binary
Type
3D scene (meshes, materials)
Used in
three.js, Babylon.js, Google model-viewer, Android AR, Shopify, Blender
IGES stores exact surfaces; GLB needs triangles. We mesh each surface with a deviation of 0.05% of the part's size, which keeps holes and fillets smooth for printing and rendering.
Dimensions stay in the units of the original file, usually millimetres.