Is it free to convert between DGN and STP?

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

.dgn

.stp

DGN vs STP

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

STP

STEP CAD File

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

.stpcad

DGN vs STP: Feature Comparison

Feature	DGN	STP
Full Name	MicroStation Design	STEP CAD File
File Extension	.dgn	.stp
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 STP

Use DGN when you need:

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

Use STP 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 STP STP DGN

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Learn More About These Formats

DGN Converter STP Converter

Frequently Asked Questions

What is the difference between DGN and STP?

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

Can I convert DGN to STP for free?

Yes! Convert999 lets you convert DGN to STP 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 STP?

It depends on your use case. DGN (MicroStation Design) may be better for certain workflows, while STP (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

STP Converter

Convert from STP

File Tools

Compress, resize, merge

Convert to DGN

All sources → DGN

Convert to STP

All sources → STP

Format Statistics

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Feature

DGN

STP

Full Name