Can I also upload the .mtl and textures?

The converter processes the .obj (the geometry). To keep complex materials and textures, the best path is exporting GLB directly from Blender or another DCC — or converting here and assigning the material at the destination, which is enough for many workflows.

Why GLB and not GLTF?

They're the same format: GLB is GLTF packed into one binary file, more convenient to share and publish. Anything that opens GLTF opens GLB.

Does the GLB keep the model's real size?

Yes — coordinates are copied without rescaling. Note the GLB convention reads units as meters: a model designed in millimeters may look large in viewers that assume meters; adjust with the viewer's or node's scale.

No file handy?

Convert toGLB

Coordinates and scale are preserved exactly as they are.

Convert OBJ to GLB

Drop your OBJ files and download them as GLB: free, in batch, and they never leave your device.

OBJ → GLB: what you should know

OBJ to GLB is the express modernization of an asset: OBJ is the classic DCC interchange format, but the web, apps and modern engines speak GLB — a single binary file, instant loading, PBR materials. If you have a library of OBJ models and need to publish them online, this is the conversion.

The OBJ's geometry — with all its groups — is packed into a GLB with coordinates intact. Materials from the .mtl aren't processed (you upload just the .obj), so the GLB comes out with a neutral, light-ready material; complex textures and materials are best reassigned at the destination or exported as GLB straight from your DCC.

For web use, the natural next step is the GLB compressor: meshopt + WebP textures typically cut 60–85% of the weight, leaving the file optimal for Three.js, <model-viewer> or any viewer.

Related conversions

STL → GLB PLY → GLB OBJ → STL OBJ → PLY OBJ → USDZ OBJ → 3MF glTF → GLB 3MF → GLB

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