A 3D Builder alternative for any computer
3D Builder runs only on Windows, from the Microsoft Store — and in some regions the Store says it is not available. The same jobs work here in a browser tab: repair, split, merge, subtract, intersect, mirror, scale, and save as 3MF or STL.
Saves model files for your slicer, never printer code. Opened and sliced in PrusaSlicer, OrcaSlicer, Bambu Studio and Cura.
3D Builder → here
Repair (the banner that offers to fix the model) → Repair, done for you on opening. Edit › Split → Cut, along X, Y or Z or at an angle, with optional pegs or pins. Merge → Combine into one. Subtract and Intersect → Combine. Scale, Mirror, Settle (lay on the bed) → Mirror, scale. Simplify → Reduce.
When 3D Builder repair takes forever
Its repair rebuilds big models slowly. Here a model of 300,000 triangles is repaired in about three seconds, and holes are closed along their own edges, so the rest of the surface is not moved.
Questions
- Can I open the 3MF files 3D Builder saved?
- Yes. Every object in a 3MF opens as its own part, in the place 3D Builder put it, and the result saves back as 3MF.
- Is anything sent to Microsoft or to you?
- No. The model stays in your browser; there is no account and no upload.