Windows
Compatible applications
Quick Facts
Basic information about this file format
Extension
.DWG
File Type
Drawing
Category
Data
Best first step
Use compatible software
Quick Summary
A practical overview of the .dwg file format
DWG is a proprietary binary file format used for storing two- and three-dimensional design data and metadata. It is the native format for several CAD (Computer-Aided Design) packages, most notably AutoCAD, and is a common format for sharing design data between different CAD applications. DWG files…
File extension
.DWG
File type
Drawing
Category
Data
Recommended action
Open with a trusted compatible app
How to open a .dwg file
Start with a trusted app that supports this format
- Check the file extension carefully and confirm that the file name really ends with .dwg.
- Use software that supports this file type. If one app does not work, try another compatible program for the same platform.
- Update the application if the file was created by a newer version of the software.
- Scan files from unknown sources before opening them, especially documents, archives, scripts, installers, and executable files.
What is a .dwg file?
File extension details and usage information
DWG is a proprietary binary file format used for storing two- and three-dimensional design data and metadata. It is the native format for several CAD (Computer-Aided Design) packages, most notably AutoCAD, and is a common format for sharing design data between different CAD applications. DWG files contain a complex structure of objects, including lines, arcs, circles, text, dimensions, and 3D solids. They can also store information about layers, blocks, and other design elements. The format is highly optimized for efficient storage and retrieval of large amounts of graphical data. Because it is a proprietary format, accessing and manipulating DWG files often requires specialized software or libraries. While Autodesk provides a free DWG viewer, full editing capabilities typically require a paid license for AutoCAD or a compatible CAD program. The DWG format has evolved over many years, with different versions of the format being used by different versions of AutoCAD. This can sometimes lead to compatibility issues when opening DWG files created with newer versions of AutoCAD in older software. The Open Design Alliance (ODA) has reverse-engineered the DWG format and provides libraries for reading and writing DWG files, allowing other software vendors to support the format without licensing technology from Autodesk.
Software Compatibility
Programs that may open or work with .dwg files
macOS
Compatible applications
Linux
Compatible applications
Mobile
Mobile applications
Can .dwg files be converted?
Options for saving or exporting this file to another format
In many cases, a .dwg file can be converted by opening it in compatible software and using an option such as Save As, Export, or Convert. The available output formats depend on the file type and the application used.
- Use the original software that created the file when possible.
- Check whether the application supports exporting to common formats.
- Be careful with online converters when working with private, business, or sensitive files.
- If conversion fails, the file may be corrupted, incomplete, encrypted, or not actually a .dwg file.
Why can't I open a .dwg file?
Common reasons this file type may not open correctly
Wrong software
The file may require a specific program that supports the .dwg format.
Incorrect extension
The file extension may have been renamed manually, even though the actual file format is different.
Corrupted file
The file may be incomplete, damaged during download, or transferred incorrectly.
Outdated app
Your software may need to be updated before it can open newer versions of this file format.
Frequently Asked Questions
Common questions about .dwg files
To open a .dwg file, use software that supports this file format.
- AutoCAD
- AutoCAD LT
- DraftSight
- BricsCAD
- LibreCAD
Open the file in compatible software and look for options such as Save As, Export, or Convert. If no export option is available, the file may require a specialized converter or the original application that created it.
- Verify that the file extension is correct.
- Install or update compatible software.
- Try another application that supports this format.
- Check whether the file is corrupted, incomplete, or encrypted.
A file extension alone does not guarantee whether a file is safe or unsafe. Only open files from trusted sources, scan unknown files before opening them, and be especially careful with executable, script, archive, and document files.
File safety tips
Use caution with unknown files
Only open files from trusted sources. Before opening a .dwg file, scan it with antivirus software, verify that the file extension is expected, and avoid running unknown executable, installer, macro-enabled document, or script files.