STL to 3MF — several STL files in one 3MF project
Convert STL to 3MF in your browser: one STL or several at once into one 3MF file, each as its own object, with every point stored exactly. Repair and measure on the way. Nothing uploaded.
Saves model files for your slicer, never printer code. Opened and sliced in PrusaSlicer, OrcaSlicer, Bambu Studio and Cura.
About this conversion
A 3MF is a zip, so it is usually less than half the size of the same model as a binary STL, and it stores each point once, so the slicer gets the model exactly as it is instead of rejoining loose triangles. Drop several STL files together and they go into one 3MF as separate objects — the way a multi-part model or a set of parts for one plate is easiest to hand to Bambu Studio, PrusaSlicer or OrcaSlicer. Units are written as millimetres.
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 OBJ (.obj) or STEP (.step). Before that you can repair it, cut it, make it smaller or combine it with another one.
Questions
- Will the slicer see the parts separately?
- Yes: each STL becomes its own object in the 3MF, named after the file.