How to Open DGN Files - DGN Viewer

Methods to Open, View, and Share DGN Files

1. Using Bentley MicroStation

Bentley MicroStation is the software specifically designed for creating and viewing DGN files. It is widely used by professionals like mechanical  engineers and civil engineersdesigners who work with complex 2D and 3D drawings in construction situations.

Key Features:

• Native support for DGN files, ensuring accurate rendering of designs.
• Advanced tools for editing 2D and 3D models.
• Full range of analysis and inspection tools.
• Collaboration capabilities for larger teams working on high-complexity projects.

However, Bentley MicroStation comes with a steep learning curve and requires a software subscription, making it less accessible for occasional users. It also has high hardware requirements to run properly.

When to Use MicroStation: 

• When you need advanced editing and analysis tools for DGN files. 
• If you already use other Bentley Systems applications in your workflow.

2. Using Free DGN Viewers

For those who only need to open and view DGN files without a need for editing, free DGN viewers are a great choice. Tools like Bentley View and OpenText Brava! Viewer are often recommended.

Key Features of Bentley View:

• Basic functionality allowing users to view, zoom in, and measure dimensions in the DGN files. 
• No cost, suited for quick and non-intensive tasks. 

Drawbacks: 

• Limited annotation and collaboration features compared to platforms like Sibe. 
• Compatibility challenges may arise for large files or certain DGN variants. 

When to Use Free DGN Viewers: 

• When you need a lightweight, no-cost solution for basic viewing and measurements. 
• If additional editing or sharing tools are not required.

3. Converting DGN Files to DWG or PDF

Another method for managing DGN files is converting them into more commonly used formats like DWG or PDF. This method works well if your current software doesn’t support DGN but can handle formats like DWG, as these files are more universally compatible..

Common Tools for Conversion: 

• AutoCAD (can import DGN files as DWG). 
• Online converters like Zamzar for converting to PDF formats. 

Key Benefits of Conversion: 

• DWG files are supported by a wider range of CAD and design tools. 
• PDFs allow for easy sharing and reviewing with team members who may not use CAD software.

Drawbacks: 

• Loss of some data fidelity during conversion. 
• Doesn’t allow continued editing of the original DGN file.
• Loss of native features.

When to Convert: 

• When working collaboratively with team members who don’t have DGN-compatible tools. 

• When you need to share the design with clients for review and they prefer PDF or DWG files.

How DGN Files Compare to Similar File Types

DGN vs DWG

• Compatibility: DGN files are primarily supported by Bentley Systems tools, while DWG is widely compatible with Autodesk programs like AutoCAD. 
• Capabilities: Both formats are used for 2D/3D designs, but DWG tends to have greater flexibility for cross-platform use, whereas DGN has more native features.. 
• Use Case: DGN is preferred for large-scale infrastructure projects, whereas DWG is common in architecture and mechanical design.

DGN vs PDF

• Purpose: While DGN files are editable formats for complex design work, PDFs are intended for static viewing and sharing outside of a CAD software. 
• Accessibility: PDFs are easier to open on standard devices, while DGN requires specialized software. 
• Use Case: PDFs are most suitable for presentations or review purposes, while DGN is ideal for design and engineering workflows.

DGN vs IFC

• Utility: IFC (Industry Foundation Classes) is more focused on interoperability across software in BIM workflows, compared to DGN’s Bentley-specific use. 
• Data Complexity: DGN offers intricate design details, while IFC emphasizes building modeling elements. 
• Use Case: DGN is better for detailed design work, while IFC is ideal for collaboration in BIM workflows.