Reduce the triangles of a 3D model
Make a model lighter by removing triangles where the shape changes least. You see the real numbers. Your file stays on your device.
Drag a 3D file hereChoose 3D file
One 3D file up to 64 MB: STL, OBJ, PLY, GLB, glTF, FBX, USDZ or 3MF, with at most 2,000,000 triangles. The file stays on your device.
Processed on your device, no upload
Guide and details
How it works
- Choose a 3D file.
- Choose how many triangles to keep.
- Click "Reduce triangles" and compare the preview and the numbers.
- Choose the format and download the result.
How the reduction works
The tool uses the simplifier of the open source library meshoptimizer. It collapses edges where the surface changes least and keeps the outline of open edges if you ask it to. It works on the shape only and keeps the colors of the parts.
The page shows the real triangle numbers before and after and the largest deviation the simplifier reports.
What to expect
The result can keep more triangles than you asked for when the shape does not allow more reduction without large changes. Reducing a lot always loses detail.
Files up to 64 MB with up to 2,000,000 triangles are processed.
Frequently asked questions
Is my model uploaded?
No. It is reduced in your browser.
How much can I reduce?
You can keep between 5 and 100 percent of the triangles. How much looks good depends on the model.
Are textures kept?
No. Textures are not carried over by any tool on this site.
Can I undo it?
Your original file is never changed. You download a new file and can try other settings as often as you like.