IBM® Rational® Modeler is a free, UML® 2.1 based environment for specifying systems, software, and architecture. Created by one of UML's founders and a key UML specification author, Rational Modeler enables users to improve communication by specifying, visualizing and documenting their system, architecture and software designs using a standard graphical language.

This product is available in the following languages: English, German, Japanese, French, Swedish, Spanish.


This trial has all features enabled. Download the product at no charge. (See the installation notes below the table.)

Operating systemVersionSizeMethodDownload
Windows1.0200MBHTTP | Download DirectorDownload now

The estimated download time using Download Director over a 1.5Mbps connection is 18 minutes.

Installation notes:

Academic Users: Rhapsody is free for research and classroom.

Browse the how-to resources including tutorials, articles, demos, production documentation, webcasts, forums, a searchable knowledge database, and more.

Offered at no charge, Rational Modeler allows users to gain access to a robust graphical design environment with check model facility, ability to create domain languages through profiles and requirements modeling. Rational Modeler models can be upgraded to the Rational Rhapsody family for model driven development (MDD) with behavioral code generation, model execution, SysML, UPDM, MARTE, model driven testing, and more.

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