How to split an STL into parts
- Drop the file into the box above.
- Each separate part is shown in its own colour, with its triangle count.
- Choose STL, 3MF or OBJ and click Download all parts.
When is this useful?
- Print kits exported as one STL (miniature bases, multi-part props).
- Assign different colours or materials per part in your slicer.
- Dental and medical scans that contain several separate objects.
Splitting a single solid with a cut
This tool separates parts that are not connected. To cut one large solid into printable pieces, use your slicer's cut tool – see how to split large models for printing.
Frequently asked questions
Why does it find only one part?
All triangles are connected, so the model is a single shell. Use a planar cut in your slicer to divide it.
Is it free?
Yes – up to 3 downloads a day are free, with no sign-up or watermark. Pro (free for 7 days) makes it unlimited.
Is my file uploaded?
No. The file is processed in your browser and never leaves your device.