Do I need Siemens NX installed?

No. Upload your NX .prt file and convert it to STEP online — no NX license required.

Are assemblies supported?

Yes. NX parts and assemblies can be converted to STEP with structure preserved.

Is the STEP editable in other CAD?

Yes. STEP provides precise B-rep solids most CAD systems can import and edit, though the feature history is not transferred.

NX to STEP中文

NX to STEP Converter Online

Convert Siemens NX (.prt) into STEP (.step / .stp), the universal neutral format for cross-CAD exchange, supplier handoff and long-term archiving. Done online in WO3D — no NX license required.

Convert Now All Converters

Universal exchange

STEP is accepted by virtually every CAD system, so partners can open your NX design.

Keeps solids

STEP preserves precise B-rep solids and assembly structure for engineering reuse.

No NX license

No Siemens NX needed — upload your .prt in the browser.

When to use it

When you must share an NX model with a supplier, client or partner on a different CAD system, STEP is the safest neutral handoff.

For long-term archiving and procurement, STEP is more durable than a version-locked native NX file.

What is preserved

STEP carries solid geometry and assembly structure, but not the NX feature tree or parametric history.

Recipients get editable B-rep geometry, not your design intent timeline.

NX .prt note

Note that .prt is used by several CAD systems; this page targets Siemens NX parts.

For Creo .prt files, use the Creo converters instead.