Where it is used
Automotive, aerospace, heavy machinery and tooling teams rely on NX.
Format Guide中文
What is Siemens NX?
Siemens NX is a high-end integrated CAD/CAM/CAE system built on the Parasolid kernel, used across automotive, aerospace and machinery. Its native part files use the .prt extension.
Published Jun 10, 2026Updated Jun 10, 2026
Native files
NX parts use .prt; the system is built on the Parasolid geometry kernel.
.prt ambiguity
Note that .prt is also used by PTC Creo — they are not interchangeable.
Working with NX data
Partners without an NX seat often need to view or convert NX .prt files, since NX is a premium system.
For cross-CAD exchange, NX is typically exported to STEP, or to Parasolid for other Parasolid-kernel systems.
View or convert online
To confirm an NX model, use the online NX viewer.
To reuse it, convert NX to STEP for engineering, or to glTF / OBJ / STL / FBX for web, rendering, printing or animation.