Fix and prepare
Fix and prepare STL files for printing
The jobs between downloading a model and slicing it. Every tool works on STL, OBJ and 3MF files on your own device, shows the result in 3D before you download it, and keeps sizes in millimetres.
- Nothing uploaded
- No sign-up
- Free, no limits
Repair STL files
When the slicer warns about errors, non-manifold edges or a model that won't slice: closes holes, turns flipped triangles the right way and removes loose triangles, then tells you exactly what it fixed.
Split STL into parts that fit your bed
For a model that's bigger than your bed: pick your printer and it works out the cuts, adds pins and matching holes so the parts line up, and gives you every part ready to print.
Reduce STL file size
For scans and sculpts with millions of triangles: shrink the file for Tinkercad, email or uploads while keeping the shape, and see the largest change in millimetres before you download.
Resize an STL to an exact size
Scale a model to an exact size in mm, fix files drawn in inches or centimetres, or make it as big as your printer allows.
STL to STEP converter
When a CAD program or a client needs STEP: turns a mesh into a solid with real flat faces you can measure, cut and add features to.
3D print cost calculator
What one print really costs: filament, electricity, machine wear and failed prints, from an STL, a G-code file or your own numbers, with a link you can share.