Is it free to convert between DGN and STEP?

Yes, Convert999 is 100% free. All conversions happen locally in your browser with no file size limits, no registration, and no watermarks.

.dgn

.step

DGN vs STEP

Compare MicroStation Design and STEP CAD File formats — understand the key differences and when to use each

Format Overview

DGN

MicroStation Design

MicroStation Design (.dgn) is a cad file format.

.dgncad

STEP

STEP CAD File

STEP CAD File (.step) is a cad file format.

.stepcad

DGN vs STEP: Feature Comparison

Feature	DGN	STEP
Full Name	MicroStation Design	STEP CAD File
File Extension	.dgn	.step
Category	cad	cad
Free to Convert	✓ Yes	✓ Yes
Browser Support	✓ All Browsers	✓ All Browsers
Convert to Each Other	✓ Yes	✓ Yes

When to Use DGN vs STEP

Use DGN when you need:

•Files in MicroStation Design format for maximum compatibility
•Industry-standard cad format support
•Wide software and platform compatibility

Use STEP when you need:

•Files in STEP CAD File format for specific workflows
•Optimized cad format features
•Modern format advantages and smaller file sizes

Convert Between Them

DGN STEP STEP DGN

Choose Files

or drag and drop files here

Max file size: 2GB

Your files are processed locally in your browser. Nothing is uploaded to any server.

Learn More About These Formats

DGN Converter STEP Converter

Frequently Asked Questions

What is the difference between DGN and STEP?

DGN (MicroStation Design) and STEP (STEP CAD File) are both cad file formats. DGN files use the .dgn extension while STEP uses .step. They differ in compression, quality, compatibility, and intended use cases.

Can I convert DGN to STEP for free?

Yes! Convert999 lets you convert DGN to STEP completely free, directly in your browser. No file upload to any server, no registration needed — your files stay private on your device.

Which is better, DGN or STEP?

It depends on your use case. DGN (MicroStation Design) may be better for certain workflows, while STEP (STEP CAD File) excels in others. Consider factors like file size, quality, software compatibility, and your specific needs.

Is it safe to convert files on Convert999?

Absolutely. Convert999 processes all files 100% locally in your browser. Your files are never uploaded to any server, ensuring complete privacy and security.

DGN Converter

Convert from DGN

STEP Converter

Convert from STEP

File Tools

Compress, resize, merge

Convert to DGN

All sources → DGN

Convert to STEP

All sources → STEP

Format Statistics

Trends & data 2025

More Format Comparisons

JPGvsPNG PNGvsWEBP JPGvsWEBP SVGvsPNG HEICvsJPG BMPvsJPG TIFFvsJPG GIFvsPNG

Feature

DGN