What Opens DWG Files
DWG files open natively in AutoCAD and in several other programs built to read and edit AutoCAD drawings. Because DWG is the native format of AutoCAD, the most reliable tools are those from Autodesk and its ecosystem, though many third-party viewers and converters handle read-only or full editing access depending on the version.
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Primary Software That Opens DWG Files
- AutoCAD — the original authoring application; opens all DWG versions with full edit and plot support.
- AutoCAD Web App — browser-based access to view and light-edit drawings tied to an Autodesk account.
- AutoCAD Mobile App — iOS and Android app for viewing, measuring, and basic markup on mobile devices.
- DWG TrueView — a free Autodesk viewer for plotting, measuring, and converting DWG files without a paid license.
- DesignSpark Mechanical — free CAD tool from RS Components that reads DWG for certain workflows.
Third-Party Viewers and Converters
Several independent tools open DWG files, often with broader format support. DraftSight and GstarCAD offer AutoCAD-like interfaces at lower price points, while LibreCAD reads DWG through conversion, though full edit fidelity varies. Online services such as Autodesk Viewer and A360 allow quick viewing without installation, but sensitive or proprietary drawings should be handled with care regarding data privacy.
Choosing the Right Tool
The right program depends on whether you need editing, only viewing, or format conversion. For full fidelity, AutoCAD remains the standard. For occasional viewing and plotting, DWG TrueView is a solid free choice. For teams sharing files across platforms, a web viewer or a cross-CAD compatible tool saves time but may require exporting to a neutral format like DXF for complex files.