Identify the source before the reader
PRT is not unique to NX. Source detection and format-version coverage belong in preflight. If the file is not recognized, ask for the authoring application rather than silently trying an unrelated conversion.
CADProps · CAD tools
NX PRT to STEP: Export Guide & File Checks
NX to STEP is not available in this release. Read the format notes and ask your sender for a self-contained STEP file.
Not available in this release
This format or conversion is not supported. Ask the sender to export a self-contained STEP file, then inspect it with the STEP viewer.
Open STEP viewer →Before you use the result
Know what you are looking at.
Use this task for Siemens NX sources, not every file that happens to end in PRT. Agree the target STEP requirements and preserve the original before conversion.
Export the agreed part or assembly
Scope, loading configuration and external references affect the result. Keep an exceptions list when the task is incomplete. A small, successful-looking STEP is not useful if it omits the component the recipient needs.
Verify in the next workflow
Check a known dimension, the unit convention, placements and a few task-critical surfaces or openings. Record output options and warnings. This release does not convert PRT files; these are checks for your own CAD export workflow.
Questions about this task
Know the limits.
Which files can I process?
Supported inputs are STEP/STP, IGES/IGS, STL, OBJ, 3MF, static GLB/GLTF, bounded ZIP packages and DWG 2D previews. Capabilities depend on format. Native CAD formats and downloadable model conversion are unavailable.
Are files uploaded?
Yes. Selecting or dropping files uploads and processes them immediately in every tool. Files are processed temporarily on this server. The workspace displays the configured retention time. Delete in the file menu permanently removes your files; closing a view does not.
Do I need an account?
No. Your temporary workspace uses a browser session cookie. There is no account, subscription or permanent file library.
How are properties calculated?
STEP/IGES use B-Rep geometry; mesh files use approximate triangle properties and require closed consistent meshes for volume. DWG is a 2D preview without physical properties. STL/OBJ coordinates assume mm. Mass uses your chosen density.
Related reading
Checks that help with this file.
ConversionCAD File Conversion Checklist: Units, Solids & Accuracy
Reopen the output, verify scope and units, inspect critical geometry, and include a short record of what was and was not checked.
Read the guide →ConversionExport NX PRT to STEP: Units and Assembly Checks
A practical NX-to-STEP handoff checklist covering PRT identification, configuration, units and post-conversion checks.
Read the guide →File formatsSTEP AP203 vs AP214 vs AP242: Colors and CAD Data
Understand STEP application protocols without treating the highest version number as a guarantee that every CAD reader preserves the same data.
Read the guide →