Formatguide

BREP File Format (.brep, .brp)

OpenCASCADE native exact-geometry format — precise NURBS topology for FreeCAD and OCC-based tools.

Gratis 30-dagers prøveperiode. Ingen kredittkort nødvendig. Windows 10/11.

Extension	.brep, .brp
Full name	Boundary Representation (OpenCASCADE native)
Geometry type	Exact solid geometry — NURBS, B-spline, topology
Open standard	Yes — OpenCASCADE Technology (OCCT)
Supports color	No
Supports assemblies	Yes — compound shapes
Primary tool	FreeCAD, any OCCT-based application

Hva er en BREP-fil?

BREP (.brep/.brp) is OpenCASCADE Technology (OCCT) native format for exact boundary-representation solid geometry. It stores OCCT internal geometric representation (NURBS surfaces, B-spline curves, exact topology). Used in the open-source CAD ecosystem — FreeCAD and any tool built on the OpenCASCADE kernel.

Vanlige bruksområder for BREP-filer

FreeCAD Native Format

FreeCAD uses BREP as an intermediate format for its Part workbench. Exporting to BREP preserves exact geometry for reimport into other OCCT tools.

CAD Kernel Integration

Developers building on OpenCASCADE use .brep files to serialize and deserialize solid geometry in CAD pipelines.

Geometry Processing & Simulation

BREP files are used in FEA preprocessing (Salome, GMSH mesh generation) and computational geometry research.

Programvarestøtte

FreeCAD, Salome, GMSH and any application built on OpenCASCADE Technology (OCCT). 3D CAD Converter reads and writes BREP using OCCT.

Konverter dette formatet

Commonly converted to STEP for universal CAD exchange, to STL or 3MF for 3D printing, or to OBJ/glTF for visualization.

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