Free GLB and glTF viewer

• Triangles. Compare with your platform budget. Too high? Remesh it.
• Clay mode. Hides textures so you can judge the shape alone. Lumps and holes are much easier to spot.
• Wireframe. Shows how evenly the triangles are spread. Dense clusters in flat areas are wasted budget.
• Normals. Colours each face by direction. Patches that flicker or look inverted point to flipped normals.
• Materials. Each material is usually one draw call in a game engine, so fewer is better for performance.
• File size. Heavy file? Usually the textures. See how to reduce GLB file size.

The viewer reads .glb files and .gltf files with embedded buffers, up to 200 MB. A .gltf that references separate .bin or image files will not load on its own; pack it as GLB first, for example with Blender’s glTF exporter.

FBX, OBJ and STL are not opened here. The studio imports them and can convert them to GLB. Going the other way? The free GLB converter turns GLB into STL, OBJ, USDZ or PLY.

The file is read with your browser’s File API and rendered with WebGL on your own device. Nothing is sent to threeD’s servers, and closing the tab clears it.