How to convert OBJ to GLB
- Drop your .obj file into the box above, or click Choose file.
- Check the 3D preview, size and triangle count.
- Make sure GLB is selected as the output format. Adjust scale or up-axis if needed.
- Click Download. The .glb file is created instantly on your device.
Why convert OBJ to GLB?
GLB packs the whole model into one compact file that loads fast on the web. If you select the OBJ together with its .mtl and texture images, materials and textures are embedded into the GLB.
What changes in the conversion
- Units. GLB is defined in metres. Large models (in millimetres) are scaled ×0.001 automatically so they appear at real size.
- Geometry is preserved. Every triangle, with all object transforms applied, ends up in the new file.
OBJ vs GLB
| OBJ | GLB | |
|---|---|---|
| Full name | Wavefront OBJ | binary glTF |
| Stores | geometry, normals and UV coordinates (materials live in a separate .mtl file) | geometry, materials, textures, hierarchy and animations |
| Colour | No | Yes |
| Textures | Yes | Yes |
| Units | none | metres by specification |
| Exact CAD geometry | No | No |
About the formats
OBJ (Wavefront OBJ) was introduced by Wavefront Technologies for its Advanced Visualizer software. It is a plain-text mesh format that stores vertices, faces, normals and texture coordinates, with materials in a separate MTL file. It is widely used to move models between 3D modelling programs such as Blender, Maya, 3ds Max and ZBrush.
GLB (binary glTF) was defined by the Khronos Group as the single-file binary form of glTF 2.0. It packs meshes, PBR materials, textures, scene hierarchy and animations into one compact file. It is the standard for 3D on the web, AR viewers, e-commerce product views and game engines.
Frequently asked questions
Is this converter free?
Yes. You can convert OBJ to GLB for free – up to 3 conversions a day, with no sign-up and no watermark. If you need more, Pro gives you unlimited conversions and batch conversion (free for 7 days).
Are my files uploaded to a server?
No. The conversion runs entirely in your browser using WebAssembly and JavaScript. Your model never leaves your computer, which also makes it safe for confidential parts and patient data.
Is there a file size limit?
There is no fixed limit. Files of a few hundred megabytes work on a typical laptop; the practical limit is your device's memory.