OBJ to STL — turn an OBJ model into a printable STL
Convert OBJ to STL in your browser: faces split into triangles, named objects kept as parts, and the model repaired into a closed solid if it has holes — so the STL slices. Nothing uploaded.
Saves model files for your slicer, never printer code. Opened and sliced in PrusaSlicer, OrcaSlicer, Bambu Studio and Cura.
About this conversion
OBJ files from Blender, scans and games are often made for the screen: open underneath, built of overlapping pieces, with faces of four or more corners. The faces are split into triangles here, and if the model is not closed it is marked in red with a Repair button, so the STL you save is one the slicer accepts. Textures and materials are not needed for printing and are left out.
Just want to look inside it?
The same tool without converting anything: open the file and read it.
The same model, other ways
The model stays open after it is read, so the format is picked at the end: the same model can leave here as 3MF (.3mf) or STEP (.step). Before that you can repair it, cut it, make it smaller or combine it with another one.
Questions
- The model is huge or tiny after converting.
- OBJ has no units. Use the size shown next to the model, and set it under Mirror, scale — type the height you want in millimetres.