Websites, AR viewers and online stores want one GLB file, not an OBJ with a separate .mtl and textures. Converting OBJ to GLB packs the model into a single file for the web. This converter runs entirely in your browser: the file is processed on your own device and never uploaded.
Why convert OBJ to GLB?
Websites, AR viewers and online stores want one GLB file, not an OBJ with a separate .mtl and textures. Converting OBJ to GLB packs the model into a single file for the web.
How it works
Drop your .obj file above and download the .glb. The conversion engine (Assimp, compiled to WebAssembly) runs inside the page, so it works the same on Windows, macOS, Linux and ChromeOS without installing anything.
OBJ vs GLB
OBJ (Wavefront): OBJ is a simple text mesh format from Wavefront Technologies. It stores vertices, faces, normals and texture coordinates; materials live in a separate .mtl file next to it. Used by: Blender, Maya, 3ds Max, ZBrush, and photogrammetry and 3D-scanning tools.
GLB (binary glTF): GLB is glTF packed into one binary file: scene description, geometry and textures together. That single self-contained file is why the web and AR use it. Used by: <model-viewer>, three.js, Android Scene Viewer, Shopify 3D product models, Blender and game engines.
Quality notes
Geometry, normals and texture coordinates carry over. Materials come from the .mtl file; a lone .obj has no material information, so the model gets a default material that you can restyle later.
Common use cases
Putting a scanned object on a product page with <model-viewer>; sharing a model by email as one file; loading assets into three.js.
Frequently asked questions
Why is my GLB grey?＋
An OBJ on its own has no materials — they live in the .mtl file and texture images. Without them the model uses a default material.
Will the GLB work on my website?＋
Yes. GLB is what <model-viewer>, three.js and Shopify 3D expect.
Is the model uploaded?＋
No. The Assimp library runs in your browser; the file stays on your device.
Can I go back to OBJ?＋
Blender imports GLB and exports OBJ if you need it.