OBJ to GLB Converter

Turn an OBJ into the one file format the web actually wants — self-contained, compact and loadable by every modern 3D viewer.

Single self-contained fileWeb & AR readyFree ≤25 MBNo sign-up

Why the web wants GLB and not OBJ

An OBJ is really two or three files pretending to be one: the geometry, a sibling .mtl describing materials, and whatever image files that .mtl references. That is fine on a workstation and miserable over HTTP — every extra file is another request, another chance for a broken relative path.

GLB packs the whole thing into a single binary blob with a layout designed to be uploaded straight to the GPU. It is what <model-viewer>, three.js, Babylon, Sketchfab and AR Quick Look all expect.

What comes across

Geometry and UVs convert. Materials do not: we produce a clean untextured mesh rather than guessing at a PBR translation of an old-style .mtl, because a wrong material looks worse than none. Assign materials in your viewer or in Blender after import.

Going the other way — pulling a GLB into a modelling tool — is on our GLB to OBJ converter.

Frequently asked questions

Do I need to upload the .mtl file too?
No. We convert geometry only, so the .obj on its own is enough. Materials are not carried into the GLB.
Is GLB the same as glTF?
Same specification, different packaging. .gltf is JSON plus external binary and texture files; .glb is all of it in one binary file. For the web, GLB is almost always the right choice.
Is this converter free?
Yes — up to 10 conversions a day and files up to 25 MB, no account needed. Larger files (up to 60 MB) and high-detail STEP output use credits ($9 for 20). Everything runs server-side on real geometry kernels, and failed jobs auto-refund.
What happens to my files?
Files are uploaded only to run your conversion and stored briefly so you can download the result. We don't share them, mine them or train on them. See our privacy policy.

Related converters

GLB → OBJOBJ → STEPOBJ → STLSTL → GLBglTF → GLB

Every converter runs the same geometry engine — see all 20 conversions.