Pro STL Slicer
Pro STL Slicer
Split giant 3D models into build-plate-sized parts with printable snap-fit joinery — then click the whole thing together like furniture. A free tool from the Owl & Twig studio.
🚀 Launch the SlicerOpens in a new tab · free to use · your files are processed in the app session and not kept
Smart grid slicing
Auto-fits cuts to your printer's build volume (Bambu presets built in), with a seam preview so cuts land in natural detail lines.
Snap-fit & diamond pins
Loose pins print flat with no supports. Snap pins click into undercut sockets; diamond pins friction-fit with tunable clearance.
Hollow with open bottom
Shell big models to true-thickness walls with an open underside — huge prints without solid-infill waste. Joint areas stay solid automatically.
How it works
- Upload your STL and pick your printer preset (or exact plate size). Or click one of the built-in samples — cube, castle, or joint-test — to try the tool without downloading anything.
- Preview the cuts, nudge seams with custom positions, choose snap-fit or diamond joinery, optionally hollow the model.
- Slice, check the 3D exploded preview, and download one combined STL (in Bambu Studio: right-click → Split → To parts) plus a ZIP of individual parts and the loose-pin plate.
Tip: very large scans (800 mm+, 600k+ triangles) run best in the downloadable desktop version — the hosted app will let you know when a model is too heavy for the free server. If the app appears asleep, click the wake button and give it about a minute.