Projects / UMLet


UMLet is a lightweight tool for rapidly drawing UML diagrams, with a sound and pop-up-free user interface. UMLet lets you draw diagram sketches quickly, teach UML with a simple user interface, and export diagrams to SVG, JPG, PDF, and LaTeX-friendly EPS. It features a fast, text-based way of editing UML elements.

Operating Systems

RSS Last announcement

New UMLet EclipsePluginCentral Site 10 Dec 2009

UMLet's EclipsePluginCentral site was updated for the new EPIC marketplace. It is available at

RSS Recent releases

  •  26 Nov 2013 00:53

    Release Notes: This release adds an improved launcher, transparency and color fixes for relations, and several EPS exportation fixes.

    •  29 Aug 2013 23:29

      Release Notes: This release has z-order support, bugfixes, and improved PDF output.

      •  20 Feb 2013 00:34

        Release Notes: This release automatically creates UML diagrams from Java source code or class files, and adds new graphical element types (beta) with syntax completion.

        •  23 Apr 2012 21:33

          Release Notes: Improved handling of special characters. Config file writes to the home directory. The ability to open multiple diagrams.

          •  28 Feb 2012 00:16

            Release Notes: This release adds better Eclipse integration, improved PDF and EPS exportation, and improved stability and startup behavior.

            RSS Recent comments

            15 Apr 2014 13:30 cjgidman Thumbs up

            I would like to create a custom relation. However, there are no custom relation templates. (Essentially, all I really want is to be able to have a multi-line qualifier (q1,q2) on the relation. I was thinking of using the backslash that works so well in other elements. So, you could just implement that and I would be happy.) Thoughts?

            03 Jan 2014 09:43 alienscience Thumbs up

            This is the favourite UML tool in our office. Sdedit ( is a nice addition for sequence diagrams.

            24 Jul 2012 18:29 vsteven

            Thanks for the great software.

            I have been using it for a while now and find it much better that any other tool I have tried before.

            08 Aug 2011 18:05 robertmuil Thumbs up

            Lovely tool for its extensibility...

            A suggestion: if custom elements could extend existing elements, customisation would be very much easier. I want to extend the 'Relation' element to add a state-machine 'interrupt' transition which is the same as the normal arrow but looks like a lightning-bolt to represent a departure from normal flow.

            20 Feb 2011 11:06 nagora Thumbs down

            Immediately fails with 'Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file'

            Admittedly this could be Java's fault.


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