How do I open a .SLDPRT file?

Drop a .SLDPRT file onto Analyser at https://analyser.valjdakosta.com/ and it opens directly in your browser - no upload, no account and no software to install. Open a SolidWorks part (.sldprt), assembly (.sldasm) or drawing (.slddrw). Older (pre-2015) files are OLE2 documents: Analyser reads the saved preview thumbnail and the document metadata (title, author, who last saved it and when). Files saved by SolidWorks 2015 or later are encrypted by Dassault Systemes, so they are identified but their contents cannot be read outside SolidWorks - in either case the editable Parasolid geometry stays proprietary, so export to STEP, STL or 3MF for the full 3D viewer.

Can I open a .SLDPRT file online for free?

Yes. Analyser is a free online .SLDPRT opener and viewer that runs entirely in your browser - your .SLDPRT file never leaves your device, so there is nothing to upload and no software to install. It even works offline once installed.

.SLDPRT file - what it is and how to open it online

Analyse a .SLDPRT file

Home › Formats › .SLDPRTPartial

What is a .SLDPRT file?

SLDPRT is a single part modelled in SolidWorks, the Dassault Systemes mechanical CAD program. Older files are OLE2 documents whose saved preview and metadata Analyser can read; files from SolidWorks 2015 onward are encrypted, so they are identified but not opened. Export to STEP or STL for the 3D viewer.

Did you know: A SolidWorks part holds a feature history - the ordered sketches and operations that build the solid - not just the final shape.
Under the bonnet a .sldprt is a Microsoft OLE compound document, the same structured-storage container technology used by classic .doc and .xls files.
A part file holds one component’s feature-based history, the recipe of operations that build up its 3D solid.
What Analyser shows you: Open a SolidWorks part (.sldprt), assembly (.sldasm) or drawing (.slddrw). Older (pre-2015) files are OLE2 documents: Analyser reads the saved preview thumbnail and the document metadata (title, author, who last saved it and when). Files saved by SolidWorks 2015 or later are encrypted by Dassault Systemes, so they are identified but their contents cannot be read outside SolidWorks - in either case the editable Parasolid geometry stays proprietary, so export to STEP, STL or 3MF for the full 3D viewer.
Depth of analysis: .SLDPRT is a partial-analysis format: Analyser opens it and shows the embedded preview or thumbnail and the metadata it can read, but the real editable content stays in the application's proprietary format and is not reconstructed in the browser. Formats with a complete viewer are marked "Full" on the formats page.
Open a .SLDPRT file: Drag a .SLDPRT file onto the Analyser home page (or tap to pick one). It opens entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.
Related formats: .SLDASM · .SLDDRW. See all supported file types.