Try Beta

StarUML 2 Beta is only for evaluation. Currently there is no time limit for evaluation.

If you are looking for previous version,
please visit here.

Download for Mac OS X
Download for Windows
Do not overwrite on existing copy of StarUML 1 or 2. Install on another path or uninstall previous version first.

Over 3,000,000 Downloads

StarUML is one of the most popular UML tool in the world. It has been downloaded over than 3 millions and used in more than a hundred of countries.


StarUML 2 is compatible with UML 2.x standard and supports totally 11 kinds of UML diagrams: Class, Object, Use Case, Component, Deployment, Composite Structure, Sequence, Communication, Startchart, Activity and Profile Diagram.


You can easily find and install extensions from Extension Registry. Moreover, anyone can write extensions using HTML5, CSS, JavaScript and Node.js. Open APIs allows to add Menus, UI, Dialogs, even new modeling languages (e.g., ERD, BPMN, SysML, etc.).

(APIs will be open in Official Release.)

Enhanced UX

StarUML 2 provides completely new platform-neutral user interfaces (Dark Theme, Quick Edit, Dialogs) while keeping usability, simplicity, and modern design trends.