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Developer(s) MKLab
Stable release v2.0.0-beta7 / August 29, 2014 (2014-08-29)
Operating system Microsoft Windows, Mac
Type UML tool
License GNU GPL

StarUML it's an open source UML tool, licensed under a modified version of GNU GPL. After being abandoned for some time, the project had a last revival to move from Delphi to Java/Eclipse and then stopped again. However, the community is still active and many topics are discussed on the forums.[citation needed]

The stated goal of the project was to replace larger, commercial applications such as Rational Rose and Borland Together.

StarUML supports most of the diagram types specified in UML 2.0. It is currently missing object, package, timing and interaction overview diagrams (though the first two can be adequately modeled through the class diagram editor).

StarUML was written in Delphi, which is one of the reasons[1] why it was abandoned for a long time.[citation needed] Since December 2005 StarUML was not updated anymore, although some external modules were updated[2]

At the end of 2011 StarUML was forked. Under the name WhiteStarUML it is now actively developed in Object Pascal. WhiteStarUML is based on the last version of StarUML (5.0) and started with that version number. The current version 5.5 was released on April 13th 2014. [3]

Currently the newest version of StarUML by the original authors is available for download under the handle "StarUML 2". The public beta is available, although not under the GPL license. Final price and new license type yet remains unknown. This version has been completely rewritten from zero and includes among many features: support for extensions, OSX compatibility and a new graphical user interface.[citation needed]


StarUML 2.0 uses its own file format, with the .umlj extension.


There is an export to PNG format, JPEG, and vector image format SVG.


Can import files from StarUML 1.0 using format .uml. Also can import a fragment from a .umlj file.

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