Home Conversions BREP to 3DM
BREP → 3DM Convert BREP to 3DM Turn a BREP CAD model into a 3DM mesh. Curved surfaces are meshed finely enough to stay smooth, and the part keeps its real size and orientation.
Fine, accurate meshing of curved surfaces Real size and right way up Runs on your computer: nothing is uploaded
How to convert BREP to 3DM Add your BREP file Drop it on the converter above or click browse. It opens in your browser, so nothing is uploaded.
Check the format is 3DM 3DM is already selected. You can switch to any other output from the menu.
Convert and download Click Convert and your 3DM file is ready in seconds. Download it straight away.
What is BREP? BREP is the native exact-geometry format of the OpenCascade kernel, used by FreeCAD, CadQuery and many engineering tools built on it.
Full name OpenCascade boundary representation Type Exact CAD geometry Used in FreeCAD, CadQuery, Salome, OpenCascade-based tools Strength Lossless for OpenCascade-based software. Limits Rarely supported outside the OpenCascade family. More about BREP What is 3DM? 3DM is the native file of Rhino, used widely in industrial, jewellery and architectural design. It stores NURBS surfaces, SubD objects, meshes and block instances.
Full name Rhinoceros 3D model (openNURBS) Type Exact CAD geometry Used in Rhino, Grasshopper, KeyShot, Blender (with add-on) Strength Rich surface modelling data from Rhino. Limits Surfaces are converted using the render meshes Rhino saves in the file. More about 3DM
Good to know BREP stores exact surfaces; 3DM needs triangles. We mesh each surface with a deviation of 0.05% of the part's size, which keeps holes and fillets smooth for printing and rendering.
Dimensions stay in the units of the original file, usually millimetres.
Questions Will curves look faceted? No. Curved faces are meshed with a tight tolerance, so holes and fillets stay smooth.
Does it keep the size of my part? Yes. The mesh has the same dimensions as the CAD model.
Are my files uploaded? No. Everything runs in your browser.