PartFit 3D
Split STL & 3MF files to fit any 3D printer
PartFit 3D launched on August 2, 2026 with 7 votes, #1,411 of 23,274 launches that month and more than 90% of that year's launches.
What it does
A free, private, browser-based STL and 3MF splitter for oversized 3D-print models. Orient a model, cut it repeatedly, check every resulting part against your printer build volume and safety margin, then export slicer-ready STL or 3MF files. No upload, account, CAD installation, or server-side model processing is required for the core tool.
Fit oversized STL and 3MF models to your 3D printer. Orient, cut, verify every part, and export slicer-ready 3MF or STL files. No uploads or CAD required.
Choose your printer, find a workable orientation, cut only when needed, and verify that every piece is ready for your slicer. Choose a model and printer. PartFit will check the size and preview a cut plan before making any changes. Upload an STL or 3MF, then choose the printer you plan to use. PartFit keeps the decision in your hands while removing the tedious size checking after every cut. Recheck fit, boundaries, non-manifold edges, and watertight seals after every cut. Select any oversized result and split it again without restarting your project. STL and 3MF geometry is processed locally. Your model is not sent to a PartFit server. Presets include the most common desktop printers. Add a…from partfit3d.com
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