How do I convert STL to STEP online for free?

Cad Conversion

Convert STL to STEP Online

Free online STL 3D Model to STEP 3D Model converter. Files are processed locally in your browser — no uploads, 100% private.

.STL

.STEP

Drop your .STL file here

or click to browse from your device

Accepts .STL files

100% Private

Files never leave your device

Instant

In-browser processing

No Account

No sign-up required

How to Convert STL to STEP Online

1Upload your .STL file using the drop zone above or click to browse
2Your file converts automatically to .STEP format entirely within your browser
3Download your converted file — no account or email needed

Frequently Asked Questions

Upload your STL 3D Model file using the drop zone above. Your file is instantly converted to STEP 3D Model format right inside your browser using client-side processing — no account, no software, and no cost. When conversion is complete, click Download to save your STEP file.

Completely. Our converter runs 100% in your browser using local processing, so your STL file never leaves your device or touches any external server. We do not store, access, or transmit your files at any point.

Desktop: up to 500 MB. Mobile: up to 200 MB. All processing happens locally in your browser — your files are never uploaded to any server.