How to Convert DWG to STL
AutoCAD DWG files with 3D solids can be exported to STL. Use AutoCAD's EXPORT command or FreeCAD for a free alternative.
Have a DXF File Instead?
If you exported your DWG to DXF, use our online converter.
Open Convert Studio3 Steps to Convert DWG to STL
Open in AutoCAD
Open your .dwg file in AutoCAD (Windows or Mac). Ensure the 3D model is visible and properly scaled.
Export as STL
In AutoCAD 3D modeling workspace, use the EXPORT command and select STL (.stl) format. Alternatively, export to DXF and convert.
Use Online Converter
If you have a DXF file, upload it to our free DXF converter. For 3D models, export directly to STL from AutoCAD.
DWG vs STL Format Comparison
| Feature | DWG | STL |
|---|---|---|
| Full name | AutoCAD Drawing | Standard Triangle Language |
| Maintained by | Autodesk | Industry standard (1987) |
| Structure | Proprietary binary | Raw triangle list |
| 2D drawing | Yes | No |
| 3D solids | Yes | Yes (tessellated) |
| Layers / blocks | Yes | No |
| Materials | Limited | No |
| Software support | AutoCAD, FreeCAD | All 3D printers/slicers |
| Primary use | Architecture, engineering | 3D printing |
What Is a DWG File?
DWG (Drawing) is the native file format of AutoCAD, developed by Autodesk. It stores 2D and 3D design data including geometry, layers, blocks, dimensions, text, and metadata.
DWG is the most widely used CAD format in architecture, engineering, and construction. It is a proprietary binary format that requires AutoCAD or compatible software (FreeCAD, BricsCAD, DraftSight) to open.
Last updated: August 2026. Format details reference the DWG format overview and the STL format overview.
Frequently Asked Questions
Can I convert DWG to STL online?
DWG files with 3D solids can be exported to STL in AutoCAD directly. If you only have the DWG file, use AutoCAD (Windows/Mac) to export STL. For 2D DWG files, STL conversion is not meaningful as STL requires 3D geometry.
How do I convert DWG to STL in AutoCAD?
In AutoCAD, switch to the 3D Modeling workspace. Type EXPORT and select STL (.stl) format. Choose the 3D solid objects to export. AutoCAD will generate the STL file.
Is there a free DWG to STL converter?
Free AutoCAD viewers (DWG TrueView) can open DWG files but cannot export STL. You need AutoCAD (full version) to export STL. Alternatively, use FreeCAD which can import DWG (via ODA converter) and export STL.
Can I convert DWG to STL without AutoCAD?
Yes, using FreeCAD (free open-source CAD). Install the ODA DWG converter addon, import the DWG file in FreeCAD, then export as STL. Our online converter handles DXF files.
Can 2D DWG files be converted to STL?
Not directly. STL requires 3D geometry (triangles). 2D DWG drawings must first be extruded into 3D solids in AutoCAD or FreeCAD before STL export is possible.
Can I convert DWG to STL on Mac?
Yes. AutoCAD has a Mac version with STL export. Alternatively, use FreeCAD on Mac to import DWG and export STL.
What is DWG file format?
DWG (Drawing) is AutoCAD's native file format developed by Autodesk. It stores 2D and 3D design data, geometry, layers, blocks, and metadata. DWG is the most widely used CAD format in architecture and engineering.
Why can't I convert DWG directly in the browser?
DWG is a proprietary format owned by Autodesk. While some open-source libraries can parse basic DWG data, reliable 3D geometry extraction requires AutoCAD or the ODA (Open Design Alliance) converter.
What is the difference between DWG and DXF?
DWG is AutoCAD's proprietary binary format. DXF (Drawing Exchange Format) is the open ASCII/binary version. Both store similar data but DXF is universally readable. Use DXF for cross-application workflows.
Does FreeCAD support DWG import?
Yes. FreeCAD can import DWG files using the ODA (Open Design Alliance) converter plugin. After importing, you can export the 3D geometry as STL using FreeCAD's STL export function.
What AutoCAD version do I need for STL export?
AutoCAD 2014 and later have native STL export. Older versions may require plugins. AutoCAD LT (2D only) cannot export STL as it lacks 3D solid modeling.
Can I convert DWG to STL in Blender?
Not directly. Blender cannot import DWG natively. Convert DWG to DXF in AutoCAD first, then import the DXF in Blender, extrude to 3D, and export as STL.