How to convert STL to STP
- Add your .STL file - drop it in the box above or click to browse.
- Convert it to .STP in a few seconds.
- Download your new .STP file.
What to expect
- The result is mesh-derived B-rep, not a native parametric model; there is no editable feature history.
- Curved surfaces stay faceted to the precision of the original STL triangles.
- STEP is text and carries geometry only, so no color, units, or material properties are introduced.
Frequently asked questions
Does converting STL to STP turn the mesh back into true CAD solids?
Not into clean parametric geometry. STL is a triangle mesh, and the STEP result wraps that faceted surface as boundary-representation data; curves and flat faces stay approximated by the original triangles rather than becoming smooth analytic surfaces.
Why convert STL to STP?
STP (ISO 10303 STEP) is the neutral format CAD programs exchange, so converting lets a mesh move into a CAD workflow that expects a solid or surface model rather than a print mesh.
Where will the STP file open?
STEP is a widely supported open standard read by FreeCAD, CAD Assistant, the Autodesk online viewer, and essentially every major CAD package. It is plain ASCII, so it is broadly portable across systems.
What is lost or added in the conversion?
Fidelity is limited by the source mesh: fine detail is only as good as the STL's triangle density, and no feature tree, tolerances, or exact dimensions are recovered. Faceting from the mesh typically remains visible on curved areas.
Programs that convert STL: CATIA · Autodesk Inventor · SolidWorks · 3D Object Converter · Creo Parametric · TurboCAD · 3ds Max (3D Studio Max) · Autoconverter
