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Welcome to the LibreCAD Wiki!


LibreCAD (originally QCad then CADuntu) is an open source 2D CAD application for Windows, Apple and Linux. It is based on Qt, which is a leading cross-platform application and UI development framework.

LibreCAD can read DWG files (and others) as of the latest Nightly build. It writes DXF files, but can also export SVG, JPG, PNG, PDF and other files. It has layers, blocks, splines, advanced tangent circle & line tools, ellipse tools, polylines, many transformation tools, an advanced snapping system and more. Because LibreCAD focuses on 2D geometry it is fast and very lightweight, with an installer of less than 30mb.

Support and documentation is free from our large, dedicated community of users, contributors and developers.

This is the community site which provides semi-static documentation for LibreCAD users and developers. Content is available under Creative Commons Attribution Share Alike.

If you wish you get involved with this documentation effort, please visit the LibreCAD Wiki:Community portal page.

If you wish you get involved in development, then head over to our GitHub repo and get started!

If you think you've found a bug or have an idea for an improvement, then head over to the LibreCAD Tracker on Sourceforge.

Other ways to give/get help

LibreCAD window
Wiki Navigation
Get LibreCAD
Wiki Help
Related Web Pages
Things We Need
  • Help Wanted. We welcome Open Source Developers to join us, to improve this free drawing tool in exciting fields such as:
    • Contribute to the wiki based on your accumulated knowledge. If you have figured out a feature in LibreCAD, please add to our wiki to help other users. Due to spam, auto-account creation is disabled. Please feel free to contact us by irc or forum to set up your account.
    • Implement more command line support for actions. Currently, there are many actions there without command line support, we need to complete this part of implementation and add the relevant documents.
    • Add support for native text based on Qt fonts. Right now, only stick fonts are supported. When the usage doesn't require stick fonts, native Qt fonts should be used for better multi-language support and efficiency
    • Implement a new and robust hatch generating algorithm
    • The current spline implementation is not efficient, we would like to replace it with a better spline implementation and add both spline and Bezier support as well, see Bezier
    • We have implemented new math support for hyperbola and parabola. Implementation support for hyperbola/parabola entities would make LibreCAD capable of doing all conic sections.
    • Feature tweaking and bug fixing for printing/painter
    • refactor header files to speed up the building process, support for pch headers
    • Document writers to help building wiki and user manuals
    • Artists to create icon themes and GUI layout
    • Add support for macports and Windows 8
    • Quality Assurance, bug hunting
    • Please visit our feature request tracker on for more information: feature requests

If you are interested in starting your open source development for LibreCAD, please feel free to leave your messages in irc/forum.