Open a STEP file
in UltiMaker Cura.

Updated 2026-10-01

Free Cura cannot open STEP files: STEP needs UltiMaker's CAD plug-in, which requires a paid subscription. Convert it to 3MF below, then open the .3mf in UltiMaker Cura. Free Cura reads 3MF natively, with its units recorded, ready to slice.

With an eligible paid UltiMaker subscription, the official plug-in opens STEP directly.

No account needed
Drop a STEP file.step / .stp · up to 200 MB

On our servers. No account: deleted within 24 hours. Signed in: kept until you delete them. Never shared or used for training.

HowThree steps
  1. Drop the .step / .stp file onto the converter on this page. 3MF is already selected.
  2. Download the .3mf file.
  3. Open it in Cura or drag it into the window.
SourceChecked 2026-10-01

What UltiMaker Cura can import was checked against its own documentation: UltiMaker Cura supported formats. Software changes; if a newer release imports STEP directly, use that.

Questions3 answered
Can UltiMaker Cura open STEP files?
Free Cura cannot open STEP files: STEP needs UltiMaker's CAD plug-in, which requires a paid subscription. With an eligible paid UltiMaker subscription, the official plug-in opens STEP directly. Checked against UltiMaker Cura's own documentation on 2026-10-01.
Why 3MF?
UltiMaker Cura reads 3MF, and 3MF records units and separate objects, so the part arrives at the right size. It is a mesh, which is what UltiMaker Cura works with anyway.
Is the conversion free?
Yes. Without an account, 5 conversions a day are free, with no card and nothing to install.
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