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Umbrello UML Modeller is a Unified Modelling Language (UML) diagramming tool from KDE

UML allows you to create diagrams of software and other systems in a standard format called Unified Modelling Language i.e. UML (

Content of diagrams can be exported into code. Existing code files can be parsed and imported to be used in diagrams.

The following diagram types are supported:

  • use case diagram
  • class diagram
  • sequence diagram
  • collaboration diagram
  • state diagram
  • activity diagram
  • component diagram
  • deployment diagram
  • entity relationship diagram

The Umbrello home page is at The source code can be found on the umbrello git repository as part of the kdesdk package. Screenshots are found on this page.

Mailing lists are:


Umbrello is in a good state, when you are able

  • to parse its source code,
  • to draw diagrams and explore its architecture, classes and code
  • make changes to it
  • and generate the code again out of its model, so that you are ready to compile it again.

Or in other words, when you can use Umbrello for developing and improving itself.

Tips and Hints

Umbrello FAQ


If you want a feature added, check the umbrello wish list and add a wishlist entry if it isn't already there. All code contributions welcome.

If you have problems

  • You can also get direct support in the #umbrello channel on the network. Please ask your question and be patient, as soon as somebody is around who can help you will get an answer.