From triangle mesh to real CAD solid

Mesh2Solid recognises the geometry in a triangle mesh (STL, 3MF or OBJ) – bores, fillets, chamfers, threads – and rebuilds it as true planes, cylinders, cones, tori and spheres. You get a STEP file you can edit in Fusion 360, SolidWorks, FreeCAD or any other CAD. It runs in your browser; your files never leave your computer unless you open them in Fusion.

How it works

1. Open an STL, 3MF or OBJ file, or drop it here.
2. Analyse: Mesh2Solid finds planes, cylinders, cones, tori, spheres, threads and freeform faces and colours them in the view.
3. Optional, with Pro: rework faces, set holes to thread sizes and check the deviation – see below.
4. Download the STEP file and edit it in your CAD: change hole diameters, move faces, add fillets.

Free and Pro

• Free for hobby projects (private, non-commercial): recognition of all shapes and STEP export.
• Pro – €12 / $12 per year, required for any commercial use:
  • Convert faces by hand, merge them into their neighbour, extend them or have them recognised again
  • Edit the mesh: pick triangle edges, extend them straight through the triangles step by step and cut faces along them – cut off stray bits, trace edges the analysis missed
  • Change hole diameters, M2–M16: clearance, tap drill, screw straight into plastic – or cut a real thread
  • Show the deviation mesh → STEP, per face as well, and print it as an inspection report
  • Fit faces to the original mesh
  • Repair open meshes (close gaps)
  • Check the STEP for validity up front and fix check findings
  • Find and fill enclosed cavities
  • Pick, rename and export single bodies
  • Open the result directly in Fusion
  • You support an independent developer. Thank you!

See all Pro features ›

FAQ

How do I convert STL to STEP?

Open the STL here, click "Analyse mesh", then "Download STEP". Unlike a plain conversion, the STEP file contains real cylinders and planes instead of thousands of triangles.

Can I edit the result in Fusion 360?

Yes. Bores become true cylinders, so you can change their diameter, move faces or add fillets. With Pro, "Open in Fusion" sends the file straight to Fusion.

Are my files uploaded?

No. Mesh2Solid runs entirely in your browser; your meshes are processed on your own computer.

Which meshes work best?

Meshes exported from CAD, such as 3D-printing models from Printables, Thingiverse or MakerWorld. Scans and sculpted models mostly end up as freeform faces.

Is Mesh2Solid free?

For private, non-commercial use, yes. Commercial use needs a Pro licence.