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Software That Opens & Edits SLDPRT Files (8 Tools, 2026)

SLDPRT and SLDASM are the native, proprietary file formats used by Dassault Systèmes SolidWorks to store individual part files and multi-component assembly data. Since SolidWorks is the most widely adopted mechanical CAD program in the world, these formats contain critical feature-history trees, equations, assembly mates, and design parameters. Because they are native and proprietary, direct interoperability with other CAD kernels often requires translation, making them the most frequently searched formats for viewing and format conversion. Below are the tools in our database that support or convert SolidWorks files.

Frequently asked

How can I open a SolidWorks file (.sldprt / .sldasm) without SolidWorks?
You can view these files for free using Autodesk Viewer or Dassault's official free eDrawings Viewer. If you need to edit or import them into other CAD platforms (like Fusion 360, Rhino, or Onshape), these platforms have built-in importers that convert them to their native geometries.
What is the best way to convert SLDPRT files to a universal format?
The industry standard is to export the file from SolidWorks as a STEP (.step) or Parasolid (.x_t) file, which preserves high-fidelity 3D solid geometry without design history.

Full read & write support (2)

  • S
    SolidWorks logo
    SolidWorksRead & Write
    from $1295 · Windows · ★ 4.9

    The de-facto industry standard for 3D parametric mechanical design.

  • DM
    DesignSpark Mechanical logo
    DesignSpark MechanicalRead & Write
    Free · Windows · ★ 0.0

    Free 3D CAD software for mechanical design with access to extensive component libraries and manufacturer support.

Read-only / viewers (6)

  • O
    Onshape logo
    OnshapeRead Only
    from $1500 · Web / iOS / Android · ★ 4.9

    The professional CAD system built for agile cloud development.

  • F3
    Fusion 360 logo
    Fusion 360Read Only
    from $85 · Windows / macOS / Android / iOS · ★ 4.8

    The cloud-native powerhouse for integrated CAD, CAM, and CAE.

  • PC
    PTC Creo logo
    PTC CreoRead Only
    from $2430 · Windows · ★ 4.8

    The original parametric 3D CAD powerhouse.

  • SN
    Siemens NX logo
    Siemens NXRead Only
    from $6000 · Windows / Linux · ★ 4.8

    Powerful high-end CAD/CAM/CAE suite for advanced manufacturing.

  • AI
    Autodesk Inventor logo
    Autodesk InventorRead Only
    from $315 · Windows · ★ 4.7

    Professional-grade 3D mechanical design and simulation.

  • C
    CATIA logo
    CATIARead Only
    from $4500 · Windows · ★ 4.7

    The high-end PLM standard for Aerospace and Automotive engineering.

Need a specific conversion?

Our interactive CAD Matchmaker filters all 8 SLDPRT-compatible platforms against your budget, hardware configuration, and precise parametric drafting needs.

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