Free online tool that automatically repairs broken STL files (holes, flipped normals, non-manifold edges) so they slice cleanly. Upload, repair, download; nothing to install.
It comes from Formware, a developer of slicing software for resin and industrial printers.
apps.autodesk.com
Autodesk's free tool for editing and repairing STL meshes: sculpting, hollowing, cutting, combining models and generating tree supports. Autodesk stopped developing Meshmixer around 2021 and folded some of its features…
cnckitchen.github.io
Free browser tool from CNC Kitchen that coils a long, strip-shaped STL into a flat spiral and exports a new STL, handy for fitting long parts on a small build plate. You set the inner radius, pitch and winding direction…
meshlab.net
Free, open-source program for processing and repairing 3D meshes, especially large or messy ones from 3D scans. It can clean up, simplify, fill holes, align scans and convert between formats. MeshLab has been developed…
