.glb is generally more efficient than .gltf in file size and loading performance.
As a binary format, .glb packages all 3D assets (meshes, textures, animations) into a single file, reducing overall size and eliminating the need for multiple external resource loads, which accelerates transmission and parsing. In contrast, .gltf is a JSON-based text format that often relies on separate files for textures or binary data, leading to larger total data volume and potential loading delays.
Typical use cases: .glb is ideal for real-time applications like web 3D, mobile games, or AR/VR where fast loading is critical; .gltf is more common in development for easy editing and debugging due to its human-readable structure.
For web or mobile delivery optimization, converting .gltf to .glb can enhance loading efficiency without compromising model quality.