How to convert BREP to STL
- Add your .BREP file - drop it in the box above or click to browse.
- Convert it to .STL in a few seconds.
- Download your new .STL file.
What to expect
- Curved surfaces are approximated by flat triangles; the mesh density is fixed at conversion, so curves are never perfectly exact.
- STL stores no units, color, or material, only geometry.
- The result is a static mesh: editable CAD features and parametric history do not survive.
Frequently asked questions
How accurate is the STL compared with the original BREP?
BREP stores exact mathematical surfaces, while STL approximates them as a mesh of flat triangles. Curved faces become faceted, and how smooth they look depends on the tessellation fineness chosen at conversion.
Why convert BREP to STL?
STL is the standard input for 3D-print slicers such as Cura or PrusaSlicer and for mesh tools, none of which read the BREP CAD kernel format directly.
What can open the STL file?
STL opens in Microsoft 3D Viewer on Windows, Quick Look on macOS, and any 3D-printing slicer, which converts it to G-code for a printer.
What is lost going from BREP to STL?
STL keeps only the surface as triangles. The exact curves, any parametric/editable CAD structure, and unit information are not carried over.
