What is a DGN file?
A .DGN file is a CAD design file. These files store 2D and 3D drawing data. Engineers, architects, and construction professionals use them for infrastructure projects. The format is a core part of 'MicroStation Design' software created by Bentley Systems.
How to open DGN files?
The primary software to open these files is MicroStation. Other CAD programs like AutoCAD can also import .DGN files. If you do not have CAD software installed, viewer.online/dgn analyzes .DGN files to identify their exact format and creator software. It shows which programs can open the file and usually previews it directly in your browser. If .DGN has multiple possible meanings, we recommend using viewer.online/dgn to identify the actual format of your file.
Best practices and troubleshooting
Compatibility issues can occur when sharing .DGN files with users who only have different CAD software. You can convert these files to improve sharing. We recommend file conversion to sensible target formats like .DWG, .DXF, or .PDF on convert.guru. Always verify the file version, because V7 and V8 .DGN formats use different internal structures.
Software and tools
Professionals use desktop applications such as MicroStation or Bentley View for precise editing and viewing. Developers use external libraries like the Teigha SDK from the Open Design Alliance to read and write .DGN data in custom applications.
Summary
Because .DGN files use the known DOC format, viewer.online/dgn can safely open and display them online, eliminating compatibility problems.