Free online SCAD to 3MF converter

Many 3D-printing slicers and CAD viewers use 3MF for project files, while SCAD files contain OpenSCAD source code rather than finished mesh geometry. Converting the source to 3MF makes the rendered model easier to import, share, and prepare for printing.

What the SCAD format is

SCAD is the native source format of OpenSCAD, a script-based solid-modeling program. A SCAD file stores modeling commands, variables, modules, transformations, and Boolean operations; it does not normally store a ready-to-print mesh.

You encounter SCAD files in parametric 3D-printing projects, reusable model libraries, and designs edited with OpenSCAD. The same source can produce different geometry when parameters or included files change, so conversion must first evaluate the script.

What the 3MF format is

3MF is a ZIP-based 3D-printing container standardized by the 3MF Consortium. It stores one or more meshes and can also contain units, colors, materials, thumbnails, object relationships, and application-specific print data.

3MF is useful when a slicer or printer workflow specifically requests it. Compared with STL, it can preserve units and object structure and usually avoids STL's separate, error-prone unit convention. A 3MF exported directly from OpenSCAD may contain only the finalized geometry, not the editable SCAD parameters or all slicer settings.

How to convert SCAD to 3MF

With OpenSCAD

1. Install and open OpenSCAD, then open the model.scad file.
2. Set the required parameter values and confirm that referenced files, such as include or use libraries, are available in the expected folders.
3. Run Design → Render (CGAL), or press F6. Preview-only rendering with F5 is not sufficient for export.
4. Check the Console for geometry errors, then choose File → Export → Export as 3MF and save the result as model.3mf.
5. Open the 3MF in the target slicer or viewer and verify scale, orientation, separate bodies, and mesh validity.

For batch conversion, use OpenSCAD's command-line export if the installed version supports 3MF output:

openscad -o model.3mf model.scad

Use the graphical interface when the file depends on customizer values, conditional code, external libraries, or non-default render settings that need visual verification.

Convert online

You can use the built-in converter on 101convert.com to convert a SCAD file to 3MF for free without installing software. Upload the SCAD file, select 3MF as the output, start the conversion, and download the generated file. The result still needs inspection in a 3D viewer or slicer, especially when the source uses external dependencies or configurable parameters.

Quality and compatibility limitations

OpenSCAD exports the evaluated solid, not the SCAD program. Parameters, modules, comments, construction history, and editable feature relationships are therefore lost.

Use F6 before exporting so OpenSCAD performs CGAL's final geometry evaluation. Non-manifold surfaces, zero-thickness features, self-intersections, and failed Boolean operations can produce missing faces or an invalid 3MF; fix the SCAD geometry before conversion.

OpenSCAD's 3MF export generally transfers mesh geometry rather than a complete slicer project. If the destination requires profiles, supports, plate arrangement, or print settings, open the exported file in that slicer and save it again as its native 3MF project format.