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. One of CNC Kitchen's free web apps, alongside BumpMesh.
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BumpMesh
bumpmesh.com
Free browser tool that adds real, printable surface textures to a model: wood grain, knurling, leather or your own image. It accepts STL, OBJ, 3MF and STEP and exports a displaced mesh, so the texture prints on any prin…
MeshLab
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…
Meshmixer
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…