GLTF (GL Transmission Format) is the standard interchange format for 3D assets on the web. Often called the "JPEG of 3D," it was developed by the Khronos Group to provide an efficient, interoperable format for delivering and loading 3D content.
GLTF comes in two flavors: .gltf (JSON-based, often with separate.bin and texture files) and .glb (binary, single-file container). GLB is more convenient for sharing and loading since everything is packed into one file.
When working with 3D models for the web, keep triangle counts reasonable (under 100K for most web applications), use texture compression, and consider LOD (Level of Detail) techniques for complex scenes.
## Tips for Working with 3D Models - GLB files are the binary version of GLTF and load faster since all data is packed into a single file. - Toggle wireframe mode to inspect the mesh topology and see how the model's polygons are structured. - If your model has animations, use the Animations tab to play, pause, and switch between different animation clips. - Use the screenshot button to capture the current viewport as a PNG image for sharing or documentation. ## Frequently Asked Questions ### What file formats are supported? This viewer supports GLTF (.gltf) and GLB (.glb) files, which are the standard 3D interchange formats for the web. GLB is the binary container version of GLTF and is recommended for easiest use since it packs all data into a single file. ### Is my 3D model uploaded to a server? No. All processing happens entirely in your browser using WebGL and Three.js. Your files never leave your device, making this tool completely private and secure for inspecting proprietary 3D assets. ### Why does my model look different than in my 3D software? GLTF uses a PBR (Physically Based Rendering) material model, which may render differently than your 3D software's proprietary shaders. Ensure you export with GLTF-compatible materials. Lighting and environment also affect appearance. ### What is the maximum file size supported? The viewer supports files up to 50MB. For larger models, consider optimizing them first using tools like gltf-transform or Blender's GLTF export settings to reduce vertex count and compress textures. ### Can I view model animations? Yes! If your GLTF/GLB file contains animations (skeletal, morph target, or object animations), they will be detected automatically. You can play, pause, and switch between animation clips using the Animations tab. ### How do I export a 3D model as GLTF from Blender? In Blender, go to File > Export > glTF 2.0 (.glb/.gltf). Choose GLB format for a single-file export. Enable 'Apply Modifiers' and select your preferred texture settings. The exported file can be loaded directly into this viewer for inspection. ### Can I inspect the PBR materials on my model? Yes. The viewer displays material properties including base color, metallic factor, roughness factor, and normal maps. For a deeper dive into individual PBR material channels, try the [PBR Material Previewer](https://findutils.com/design/pbr-material-previewer). ### Does the viewer support models with multiple scenes? The viewer loads the default scene from your GLTF/GLB file. If your file contains multiple scenes, the primary scene is rendered automatically. Most 3D authoring tools export a single scene by default. ### What are the best practices for optimizing GLTF models for the web? Keep triangle counts under 100K, use texture compression (KTX2 or Basis Universal), remove unused materials and empty nodes, merge meshes where possible, and use Draco compression for geometry. Tools like gltf-transform and gltf-pipeline can automate much of this optimization. ### Can I use this viewer on mobile devices? Yes. The viewer uses WebGL which is supported on all modern mobile browsers. However, complex models with high polygon counts or large textures may run slower on mobile devices due to limited GPU and memory resources. ## Related Tools - [PBR Material Previewer](https://findutils.com/design/pbr-material-previewer/) - [3d Rotation Visualizer](https://findutils.com/developers/3d-rotation-visualizer/) - [3d Geometry Visualizer](https://findutils.com/calculate/3d-geometry-visualizer/) - [3d Vector Visualizer](https://findutils.com/calculate/3d-vector-visualizer/) - [3d Function Plotter](https://findutils.com/calculate/3d-function-plotter/) - [SVG Path Visualizer](https://findutils.com/design/svg-path-visualizer/) - [Image Color Extractor](https://findutils.com/design/image-color-extractor/) - [Image Converter](https://findutils.com/convert/image-converter/)