The best online tools for exporting GLTF 3D models are Khronos Group's glTF Transform, Three.js Editor, and Blender Web—widely trusted for effective GLTF handling.
- **glTF Transform**: Optimizes or converts existing models to GLTF, balancing quality with smaller file sizes. - **Three.js Editor**: Lets you tweak scenes (e.g., materials, lighting) before export, with a simple interface for quick edits. - **Blender Web**: Supports native GLTF export while preserving textures, animations, and details—ideal for complex models.
For beginners, start with Three.js Editor’s ease of use; for detailed projects needing full attribute retention, use Blender Web or glTF Transform for optimization.