GLB

GLB is the binary container format for glTF 2.0, maintained by the Khronos Group. It packs meshes, materials, textures, and animations into one file, making it the de facto standard for Web 3D and AR/VR. Three.js, Babylon.js, model-viewer, and mainstream e-commerce 3D previews deliver GLB by default because it is self-contained and avoids missing external resources.

GLB preserves PBR materials and skeletal animations, supports Draco and Meshopt compression, suiting web display, quick AR, and cross-software delivery. However, it lacks CAD parametric history: meshing STEP or native CAD to GLB loses parametric editing. For 3D printing, use STL or 3MF instead, as most slicers cannot import GLB directly.