If you work with DWG files, finding the right DWG file editor can be challenging—especially if you’re looking for open-source or freeware alternatives. While AutoCAD DWG editing tools are often costly, several free DWG editors allow users to open, edit, and modify DWG files without expensive licenses.
In this guide, we’ll explore the best free and open-source DWG file editors, compare their features, and help you find the best tool for 2D drafting and 3D modeling.
What is a DWG File?
A DWG file is a widely used format for CAD (Computer-Aided Design) drawings, originally developed by Autodesk for AutoCAD. This file type contains 2D drawings, 3D models, and metadata essential for architectural, engineering, and design projects.
Since AutoCAD DWG files are proprietary, not all software can edit DWG files directly. However, many open-source DWG editors and free DWG file viewers allow users to modify CAD drawings without purchasing expensive software.
Best Open-Source & Freeware DWG File Editors
Here are some of the best free DWG file editors and open-source CAD software for editing and viewing DWG files.
1. LibreCAD (Open-Source)
🟢 Free & Open-Source | Platform: Windows, macOS, Linux
LibreCAD is one of the best open-source DWG editors available for 2D drafting.
✅ Key Features:
- Supports DWG, DXF, and SVG file formats
- Lightweight and fast for 2D design
- Works on Windows, Mac, and Linux
- Free forever with no restrictions
🚀 Best For: Engineers, architects, and designers who need a free 2D DWG editor.
2. FreeCAD (Open-Source)
🟢 Free & Open-Source | Platform: Windows, macOS, Linux
FreeCAD is a powerful parametric 3D CAD software that supports DWG file editing.
✅ Key Features:
- Compatible with DWG, DXF, STEP, and IGES files
- Best for 3D modeling and parametric design
- Plugin support for DWG file compatibility
- Free and community-driven
🚀 Best For: Engineers, mechanical designers, and anyone looking for a free 3D DWG file editor.
3. NanoCAD (Freeware)
🔵 Free Version Available | Platform: Windows
NanoCAD is a free DWG file editor that provides AutoCAD-like features without the high cost.
✅ Key Features:
- Full support for DWG file editing
- Familiar AutoCAD-style interface
- Advanced 2D and 3D modeling tools
- Free version available with basic CAD functionality
🚀 Best For: Users looking for an AutoCAD alternative with DWG file support.
4. DraftSight (Free for Individual Use)
🔵 Free & Paid Versions | Platform: Windows, macOS
DraftSight is a professional-grade DWG editor with a free version for individual users.
✅ Key Features:
- Supports DWG file editing and creation
- Familiar interface for AutoCAD users
- Available for Windows and Mac
- Free for personal use
🚀 Best For: Professionals and students who need a powerful DWG editor for free.
5. QCAD (Open-Source for 2D CAD)
🟢 Free & Open-Source | Platform: Windows, macOS, Linux
QCAD is another excellent open-source DWG file editor, focused on 2D CAD drafting.
✅ Key Features:
- Supports DWG, DXF, and SVG formats
- Simple, lightweight, and easy to use
- Runs on Windows, Mac, and Linux
- Open-source and free for personal use
🚀 Best For: Designers and engineers looking for a lightweight 2D DWG editor.
Comparison: Best Free & Open-Source DWG Editors
Software | Type | 2D Support | 3D Support | Operating System |
---|---|---|---|---|
LibreCAD | Open-Source | ✅ Yes | ❌ No | Windows, Mac, Linux |
FreeCAD | Open-Source | ✅ Yes | ✅ Yes | Windows, Mac, Linux |
NanoCAD | Freeware | ✅ Yes | ✅ Yes | Windows |
DraftSight | Freeware | ✅ Yes | ✅ Yes (Paid) | Windows, Mac |
QCAD | Open-Source | ✅ Yes | ❌ No | Windows, Mac, Linux |
How to Choose the Best Free DWG Editor?
1️⃣ For 2D Drafting: 🏗️ LibreCAD or QCAD are great free options.
2️⃣ For 3D Modeling: 🏢 FreeCAD provides powerful parametric tools.
3️⃣ For an AutoCAD Alternative: 🖥️ NanoCAD or DraftSight offer familiar interfaces.
4️⃣ For Open-Source CAD Tools: 📖 LibreCAD, FreeCAD, or QCAD are the best choices.
Final Thoughts
Whether you’re looking for an open-source DWG file editor or a free DWG viewer with editing features, this guide provides some of the best freeware and open-source options available.
From 2D drafting with LibreCAD to 3D modeling with FreeCAD, these DWG file editors provide cost-effective solutions for designers, engineers, and CAD professionals.