Convert OBJ to GLB
Convert a Wavefront OBJ into a single GLB file that loads directly in web viewers and game engines.
Free, no account, up to 50 MB per file. Uploads are private and deleted after 24 hours unless you sign in, which claims them and keeps them for 7 days.
What survives OBJ → GLB
- Geometry
- UV coordinates where the OBJ declares them
- Vertex colours where present
What is not carried across
- Materials and textures defined in a separate .mtl file. Only the uploaded .obj is read, so anything it references by filename is not available to the conversion.
About Wavefront OBJ files
- An OBJ stores geometry only. Its materials live in a separate .mtl file, and its textures in separate image files.
- Uploading the .obj on its own converts the geometry. The materials and textures are not part of that file, so they cannot be carried across.
- Vertex colours written by some scanners are read where present.
Why GLB
- One file carrying geometry, materials and textures — nothing to lose in transit.
- The native format for glTF viewers, three.js, Babylon.js, Unity and Unreal import, and the web generally.
- Compact binary layout, so it downloads and parses faster than an equivalent text format.
Common problems
- The GLB opens grey with no textures.
- The textures were in files beside the .obj, not inside it. Re-export from your 3D application straight to GLB, which embeds them.
- The upload is rejected as not an OBJ.
- The file is probably a renamed binary. OBJ is plain text beginning with lines like v, vn, or #.
After converting
Converting changes the container, not the geometry — a heavy model stays heavy. If the result is destined for the web or a game engine, reducing its triangle count is the part that makes it load faster.