STL Splitter for Your Print Bed

A 300 mm statue on a 256 mm plate, a cosplay helmet on an A1 mini, a sign longer than the bed: the model is fine, it just does not fit. This tool cuts it into parts that do. Choose your printer from the list (Bambu Lab A1 mini, A1/P1/X1, H2D, Prusa MINI, MK4S, CORE One, XL, Creality Ender 3, K1, K1 Max, Elegoo Neptune 4 and Neptune 4 Max, Anycubic Kobra, Sovol, Voron, and the common resin printers) or type the build volume, and the model is cut by flat planes into the smallest grid of parts that fit with 1 mm to spare on every side.

Every cut is closed. The loop the plane leaves on each side is triangulated into a flat cap, holes included, so each part is a solid, watertight body your slicer accepts without repair. The parts keep the model's original coordinates: import them all and they sit exactly where they belong, which is what you want for gluing and for checking the fit. Before cutting, the mesh gets the same clean-up as the STL Repair tool: non-manifold edges separated, duplicate and collapsed triangles removed, holes up to 500 edges closed.

The report tells you what you got: how many parts and in which grid, whether every part is closed, and the parts' total volume against the original, which is the honest check that nothing was lost or doubled. Models built from overlapping bodies that were never unioned are cut shell by shell, so each shell stays closed; the report says so when a part could not be closed, which happens only when the input itself had open or intersecting surfaces.

The parts arrive as one ZIP of binary STLs named by their grid position. Files are processed on our server in isolated memory and deleted within 15 minutes of your download. One file up to 50 MB a day is free; a credit pack, a 24-hour pass or a subscription covers the rest, shared with the STL Compressor and STL Repair.