Private, in your browser
Your OBJ is converted on your own computer and never uploaded. Files up to 300 MB are accepted.
OBJ to GLB Converter
Pack a Wavefront OBJ into a single binary glTF for web viewers, AR and game engines. Nothing leaves your browser.
Loading 3D preview
Drag to rotate
Converted in your browser. Files are never uploaded.
Continue with your model
Check the GLB before you publish it, look at the source OBJ, or make a print file instead.
How to convert OBJ to GLB
- 1
Add your OBJ files
Drop one or more .obj files from Blender, Maya, ZBrush, a photogrammetry app or a model library. The .mtl file and texture images are not read, so the .obj alone is enough.
- 2
Set the real size
OBJ has no unit and is read as millimeters. Blender writes OBJ in meters, so a 2 m model comes out 2 mm; turn on Resize longest side and enter 2000.
- 3
Download the GLB
Save one GLB per OBJ with each object as a named mesh, or one GLB per object. Several files download together as a ZIP.
Why use this OBJ to GLB converter
Built for moving OBJ exports onto web pages, AR viewers and game engines.
Size shown before you export
The model sits on a build plate with its size in millimeters or inches, so a file saved in meters or centimeters stands out before it becomes a GLB.
Crisp edges, smooth curves
Normals are rebuilt with a 40 degree crease angle, so hard edges stay sharp and curved surfaces shade smoothly.
Batch to one ZIP
Drop several OBJ files at once and download every GLB together in a single ZIP.
What changes when OBJ becomes GLB
The shape and its object structure move into one self-contained binary file. Whatever lived in the .mtl and image files stays behind, and the GLB gets one neutral grey material in its place.
Kept
- Every o and g object, as a named mesh
- Object positions and layout
- Y-up orientation
- Quads and n-gons, split into triangles
Left behind
- Materials and colors from the .mtl file
- Textures and UV coordinates
- Stored normals and smoothing groups (recomputed)
- Lines, points and vertex colors
OBJ to GLB questions
Answers about materials, scale, separate objects and cost.
Why convert OBJ to GLB?
OBJ spreads a model across an .obj text file, an .mtl file and loose images. GLB packs it into one binary file that loads faster and is the format web viewers, Android AR and engines such as Godot and Babylon.js expect. Binary numbers usually make it smaller than the OBJ text as well.
Are the materials and textures kept?
No. The GLB gets the geometry with one neutral grey material. To carry textures across, import the OBJ with its .mtl into Blender and choose File, Export, glTF 2.0 with the format set to glTF Binary (.glb). That GLB keeps the textures and PBR materials.
Why is my GLB tiny or huge?
OBJ files carry no unit, so the converter reads them as millimeters, the 3D printing convention, and GLB stores meters. Blender exports OBJ in meters and Maya in centimeters, so check the size readout and use Resize longest side to set the real size in mm. A Maya model 30 units tall is 30 cm, so enter 300.
Does the GLB keep separate objects?
Yes. Each o or g object in the OBJ becomes a named mesh in the GLB, in the same place. Choose One per object to save each as its own GLB instead. Object names come from the OBJ, so you can find each part by name in Blender or your engine.
Is the OBJ to GLB converter free?
Yes. It is free and unlimited and runs in your browser, so the OBJ is never uploaded. Files up to 300 MB are accepted, and you can convert several OBJs in one go.