View BREP files in your browser
The exact shapes of OpenCascade, the CAD kernel inside FreeCAD and CadQuery. Open a BREP right here in 3D, with its edges. Nothing leaves your device.
Or drop it anywhere on this page
What you'll see
Your part opens in 3D with its edges, lit and framed, with its assembly beside it and what you pick on the other side.
- Every part and assembly • How many times each is used
- Inspect • A part's volume and mass, a hole's size
- Measure • Snaps to the middle of holes
- Export • PNG, STL, OBJ, GLB and the parts list
About BREP
BREP is OpenCascade's own format, used since the 1990s by the open CAD kernel that FreeCAD, CadQuery, KiCad's 3D view and many tools are built on. FreeCAD saves its shapes as BREP inside its files and exports them on their own.
A BREP file is text that describes an exact shape: its solids, faces, edges and vertices, on planes, cylinders and curved surfaces. It keeps no colors, names or units.
Filepeek reads it with OpenCascade inside your browser and draws the shape with its edges. Inspect gives its size, volume and area, Measure snaps to edges and holes, and Export saves it as STL, OBJ or GLB.
OpenCascade BREP
.brep
Format
- MIME type
- model/vnd.opencascade.brep
- Made by
- Open Cascade
Inside the file
- Shapes
- Exact solids, faces and edges
- Markup
- Text
- Units
- None, read as millimeters
- Made by
- OpenCascade, FreeCAD, CadQuery
Opens in every browser
Browsers download BREP files. Filepeek opens them with OpenCascade in Chrome, Edge, Firefox and Safari.
- YouChromeOpens through Filepeek
- YouEdgeOpens through Filepeek
- YouFirefoxOpens through Filepeek
- YouSafariOpens through Filepeek
Questions
How do I open a .brep file?
Drop it on this page or press Peek a BREP. The shape opens in 3D, with nothing to install.
Why are the sizes in millimeters?
A BREP keeps no unit, so Filepeek reads it as millimeters, as FreeCAD writes it.
Can I turn a BREP into an STL?
Yes. Choose Export, then Save as STL for a 3D printer.
Is my file uploaded?
No. The file opens inside your browser and never leaves your device.