Step 1 · Import

FBX → Mapbox-ready GLB

Upload your model as an FBX file, under 25 MB, with the fewest vertices and materials the model allows. Lighter inputs convert faster and produce a smaller result.

Drop an FBX here

or click to browse · keep it under 25 MB

Convert FBX to glTF
assimp · Z-up to Y-up
Scale to metres
detect units · bake transform
Re-origin to base
centre footprint · base y=0
Merge to ≤40 materials
cut draw calls · keep hard edges
Strip site geometry
grass · road · water
Split meshes over 65k
16-bit index limit
Compress · meshopt
quantize · size to target
Validate
size · meshes · limits

Result

Run the pipeline to see size, mesh & material stats here.

Result

Output size vs target