PartFit 3D

PartFit 3D is a browser-based tool for splitting oversized STL and 3MF files so they fit your 3D printer. Upload a model, choose your printer from presets for Bambu Lab, Creality, Prusa, Anycubic, ELEGOO, QIDI and Flashforge, then orient and cut pieces as needed. The tool checks each part against your build volume and safety margin, marks whether pieces fit, and rechecks boundaries and mesh integrity after every cut.

All processing happens locally in your browser with no uploads to a server. You can cut the same oversized piece multiple times without restarting, keeping results in a parts list as you work. Export finished parts as a 3MF project or STL set for your slicer. The tool includes size checks, orientation options (exact angles, face-to-bed, or automatic), and verification for open boundaries, non-manifold edges and watertight seals.

PartFit requires no account and handles files up to 200 MB. It does not replace slicer or physical print verification, but blocks exports when mesh checks fail.