What is a SLDPRT file?

A SLDPRT file is a 3D part document created by SolidWorks, the CAD program developed by Dassault Systèmes. The .sldprt file extensionstands for “SolidWorks Part” and stores a single part's geometry, features, and metadata.

How to open a SLDPRT file

The native way to open a SLDPRT file is in SOLIDWORKS, or with the free SOLIDWORKS eDrawingsviewer. If you don't have either, you can use a free online SLDPRT viewer to open and inspect this computer file in your browser — no install required. To edit the part in another CAD program such as Autodesk Fusion 360 or Inventor, convert it to a neutral format first.

How to convert a SLDPRT file

To use the part in another program, convert it to a neutral format. The most common conversions are SLDPRT to STEP for other CAD software and SLDPRT to STL for 3D printing.

SLDPRT vs. SLDASM

A .sldprt file holds a single part, while a .sldasm file is a SolidWorks assembly made up of multiple parts. Drawings are stored separately as .slddrw files.