3D Printing File Tools: STL & 3MF
Free browser tools for STL and 3MF files: view and measure a model, convert between formats, check that it fits your printer, and lay out parts on the plate. Files are processed on your device and never uploaded.
Every tool is a different starting point for the same workbench, so a file you open in one stays loaded when you switch to another.
- STL & 3MF Viewer and Inspector
Drop an STL or 3MF file to see it on your printer's bed, with its real size and a mesh health check.
- STL to 3MF Converter
Turn one or more STL files into a single 3MF, with each file kept as a separate object in millimeters.
- 3MF to STL Converter
Flatten a 3MF project into a universal STL, or export just the objects you select.
- 3D Print Bed Arranger
Check what fits on your printer's plate and lay out several parts before you open the slicer.
- Online STL & 3MF Editor
The full workbench: open STL or 3MF files, edit objects on a printer bed, inspect them, and export STL or 3MF.
Designing a part from scratch?
These tools prepare existing meshes. To design a parametric part, use the OpenSCAD playground, which exports STL and 3MF that you can open here to arrange, or follow the OpenSCAD tutorial.