Kept
- Geometry and silhouette
- Per-material colours
- A single .glb file
Runs locally · no upload
Compress a GLB file
Reduce a GLB by quantizing its geometry: positions become 16-bit, normals 8-bit and indices 16-bit when possible. You can also decimate the mesh to remove triangles, and drop textures for a much larger reduction.
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Drop a 3D file hereSTL, OBJ, PLY, GLB, glTF, 3MF or STEP · up to 100 MB · processed locallyYour file never leaves this browser.
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What changes in the conversion
Dropped
- Float precision: positions are quantized to 16 bits
- Textures and PBR maps when you enable the option
- Thin details lost to decimation (optional)
- Animations, skins and morph targets (static models only)
Common mistakes
- An already-quantized GLB gains little; textured files gain most from dropping textures.
- Quantization can soften hard edges; check the shading after export.
- Skinned meshes and animations are not preserved by the quantized writer.
For 3D printing
- For printing, convert to STL instead: GLB textures are useless to a slicer.
- If the model is for the web, test the compressed GLB in your viewer before shipping.
Drop the file — it is read locally, never uploaded.
Choose the options, then convert or compress.
Download the result and open it in your slicer or 3D software.
Frequently asked questions
Is this Draco compression?+
No. It uses KHR_mesh_quantization (16-bit positions, 8-bit normals), supported by every modern glTF loader. Draco or Meshopt would compress further but need a WASM codec.
Why did the file barely shrink?+
If the geometry is already quantized or the file is dominated by Uint32 indices, gains are small. Enable decimation or texture removal for the biggest reduction.
Do textures survive?+
Untextured GLBs are quantized directly. Textured GLBs keep their maps unless you enable the texture option; with it, textures are dropped and the geometry is quantized.
Need a model instead of a conversion?
Turn a photo, a drawing or a logo into a 3D model, then export it in the format you need.