What is the difference between DGN and DWG formats?

While DWG (Autodesk) dominates general AEC and building design, DGN (Bentley) is optimized for massive infrastructure projects. DGN V8 has no file size limitations and handles high-precision geospatial coordinates much better than standard DWG.

How do I convert a DGN file to DWG or DXF?

Bentley MicroStation has a built-in batch converter to export DGN directly to DWG. Autodesk AutoCAD can also import DGN files using the DGNIMPORT command, converting DGN elements into DWG entities.

2D/Vector Drafting Standard19 verified tools

Software That Opens & Edits DGN Files (19 Tools, 2026)

DGN is the native file format of Bentley Systems MicroStation and its vertical civil infrastructure design suites. Originally developed in the 1980s, the DGN format (specifically V8 DGN) is widely recognized as the format of record for large-scale, long-lifecycle civil engineering projects, including highways, railways, bridges, and plant designs. Known for its incredible stability with massive datasets, DGN is the standard format for major transport departments and civil engineering consortia globally.

Instant DGN Engineering Utilities

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Size Optimizer

DWG Bloat & File Size Reducer

Purge orphaned DGN linetypes, RegApps & scale lists in seconds.

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AC1018–AC1032

AutoCAD DWG Version Matrix

Verify header versions and down-saving compatibility risks.

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DGN Geospatial & Large-Scale Design Standards

Rule 1:64-bit Element Database: DGN V8 utilizes a 64-bit coordinate space, letting infrastructure designers place millions of assets across vast geographic systems without coordinate degradation.

Rule 2:Master vs Sub-Units Mapping: Always map working units (e.g. Survey Feet vs Meters) explicitly when importing DGN datasets into AutoCAD to prevent scale shifts.

Rule 3:Integrated History Tracking: DGN archives support delta history logs, enabling CAD administrators to audit and rollback design modifications to older timestamps.

Full read & write support (10)

R
RevitRead & Write
Subscription · Windows · ★ 4.9
The de-facto standard for Building Information Modeling (BIM).
TS
Tekla StructuresRead & Write
Custom Quote · Windows · ★ 4.9
The world's most advanced structural BIM software.
C3
Civil 3DRead & Write
Subscription · Windows · ★ 4.8
Civil engineering design and documentation software.
M
MicroStationRead & Write
Subscription · Windows · ★ 4.8
The infrastructure engineering standard for massive projects.
B
BricsCADRead & Write
Subscription / Perpetual · Windows / macOS / Linux · ★ 4.7
The modern CAD platform for 2D, 3D, BIM, and Mechanical.
OD
OpenRoads DesignerRead & Write
Subscription · Windows · ★ 4.7
Comprehensive civil road design platform by Bentley.
TP
TurboCAD PlatinumRead & Write
Perpetual · Windows / macOS · ★ 4.6
All-in-one professional 2D/3D design suite.
A
AllplanRead & Write
Subscription · Windows · ★ 4.5
Professional BIM platform by Nemetschek for AEC.
HS
Hexagon SmartPlant 3DRead & Write
Custom Quote · Windows · ★ 4.4
Hexagon's data-centric plant-design platform (now part of CADWorx & Analysis Solutions).
C
CorelCADRead & Write
Perpetual · Windows / macOS · ★ 3.6
Affordable DWG-compatible CAD software offering 2D drafting and 3D design tools for professionals on Windows and macOS.

Read-only / viewers (9)

AM
AVEVA MarineRead Only
Custom Quote · Windows · ★ 4.9
Integrated engineering and design for shipbuilding.
BR
Bluebeam RevuRead Only
Subscription · Windows · ★ 4.9
The AEC standard for PDF markup and collaboration.
A
AutoCADRead Only
Subscription · Windows / macOS / Web / Android / iOS · ★ 4.8
The global industrial standard for 2D drafting and 3D modeling.
G
GstarCADRead Only
Perpetual · Windows · ★ 4.8
High-performance AutoCAD alternative.
N
NavisworksRead Only
Subscription · Windows · ★ 4.8
Project review software for clash detection.
Z
ZWCADRead Only
Subscription / Perpetual · Windows / Linux · ★ 4.6
The most cost-effective and compatible alternative to AutoCAD.
AC
ARES CommanderRead Only
Subscription · Windows / macOS / Linux / Web / Android / iOS · ★ 4.5
Professional DWG CAD with cross-platform trinity.
AP
AutoCAD Plant 3DRead Only
Subscription · Windows · ★ 4.3
Autodesk's specialized plant-design toolkit for piping, equipment, and P&ID workflows — included with AutoCAD subscription.
D
DraftSightRead Only
Subscription · Windows / macOS · ★ 4.3
Professional-grade 2D CAD solution from Dassault Systèmes.

Frequently asked

What is the difference between DGN and DWG formats?: While DWG (Autodesk) dominates general AEC and building design, DGN (Bentley) is optimized for massive infrastructure projects. DGN V8 has no file size limitations and handles high-precision geospatial coordinates much better than standard DWG.
How do I convert a DGN file to DWG or DXF?: Bentley MicroStation has a built-in batch converter to export DGN directly to DWG. Autodesk AutoCAD can also import DGN files using the DGNIMPORT command, converting DGN elements into DWG entities.

Need a specific conversion?

Our interactive CAD Matchmaker filters all 19 DGN-compatible platforms against your budget, hardware configuration, and precise parametric drafting needs.

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Convert, Compress & Inspect DGN Files Online

DWG Bloat & File Size Reducer

Online CAD File Compressor

AutoCAD DWG Version Matrix

Full read & write support (10)

Read-only / viewers (9)

Frequently asked

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