NEPLAN project
File type: Various data file
A .nepprj file is a project file created and saved by NEPLAN.
It belongs to the Windows version of the NEPLAN network analysis and planning software.
File type category:
Various data file
Date updated: October 9, 2026
NEPLAN, developed by NEPLAN AG, is used to analyze, plan, optimize and simulate electrical, water, gas and district heating networks. A .nepprj file stores a NEPLAN project for one of these types of network studies.
The file is used as part of a NEPLAN project and contains the project data needed for the software to reopen and work with the network model and its analyses.
NEPLAN is available for Microsoft Windows. The .nepprj format is therefore associated with the Windows NEPLAN application.
Open the file in NEPLAN on Microsoft Windows. You can usually open it from the application's file menu or by opening the file from Windows if the extension is associated with NEPLAN.
A suitable version of NEPLAN may be required if the project was created with a different release.
Open the project in NEPLAN and use the software's available export or data-transfer features if the network data must be moved to another format.
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