HiCAD 3D CAD drawing
File type: 3d graphics, CAD-CAM-CAE file
Files with the szn file extension are native 3D CAD drawings or models created with HiCAD.
The format belongs to HiCAD, a CAD application for Microsoft Windows.
File type category:
3d graphics, CAD-CAM-CAE file
Date updated: October 30, 2026
The szn file extension is associated with HiCAD, a 2D design and 3D modeling application developed by ISD Software und Systeme GmbH. An szn file stores a HiCAD 3D CAD drawing or model.
The file is intended to be opened and edited in HiCAD neXt on Microsoft Windows. It is a native HiCAD format rather than a general-purpose CAD exchange format, so it is normally opened in the software that created it.
Open an szn file with HiCAD neXt on Microsoft Windows. Use the program's Open command and select the file.
Open the szn file in HiCAD neXt and use the program's export or Save As commands to create a supported CAD exchange file. The available formats depend on the installed HiCAD version and modules.
There is no need for conversion when the drawing will continue to be edited in HiCAD. Exporting to another format may omit HiCAD-specific features or drawing information.
Software applications that can open szn files:
Microsoft Windows
Software applications that can edit szn files:
Microsoft Windows
Software capable of saving szn files:
Microsoft Windows
Software apps that create szn files:
Microsoft Windows
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