OBJ to GLB

OBJ (Wavefront) is a common exchange format for 3D programs such as Blender, Cinema 4D or Maya. For the web, AR and modern viewers, though, glTF is the standard - with GLB as the compact single-file variant that bundles everything into one binary file. This tool reads the geometry of your OBJ and writes a valid GLB file from it, for instance for the model-viewer element, three.js or Babylon.js.

From the indexed OBJ mesh (a vertex pool with faces referencing it) a glTF 2.0 structure is produced: vertex and index buffers in the GLB binary part plus accessor and mesh entries. Polygons with more than three corners are split into triangles; the coordinates are carried over unchanged as 32-bit floating-point numbers.

Everything runs entirely locally in the browser - your model never leaves your device. Honestly framed: pure geometry is transferred. Materials from a companion MTL file as well as texture coordinates, normals and groups are not carried over. A broken or empty file is rejected with a clear message.

GLB is regarded as the 'JPEG of the 3D world': a single, self-contained binary file that web viewers, the <model-viewer> element and AR previews display directly - with no companion files. That is exactly the difference from OBJ, which carries its materials in a separate .mtl file; this is why the conversion transfers the pure geometry into one ready-to-ship single file.

Specifications

In 3 steps

1. Drop your OBJ file.
2. The conversion runs automatically.
3. Download the GLB (e.g. for model-viewer).

Limitations: Converts OBJ to a GLB file (binary glTF 2.0): polygons are split into triangles and coordinates stay unchanged (32-bit float). Pure geometry is transferred - MTL materials, texture coordinates, normals and groups are not carried over. An invalid or empty file is rejected with a clear error.

FAQ

Related tools

STL to GLB · GLB to OBJ · glTF to GLB · STL to PLY · GLB to glTF · JSON to TOML