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A desktop application for fast UML diagramming.


GitHub release License: GPL v3 GitHub all releases GitHub Repo stars GitHub contributors

A lightweight desktop application for interactively creating and editing diagrams in the Unified Modeling Language. JetUML supports the sketching of software design ideas with a minimum of fuss. Diagrams can be saved in JSON, exported to popular image formats, and copied to the system clipboard for integration with other tools. Supports class diagrams, sequence diagrams, state diagrams, object diagrams, and use case diagrams.

JetUML Class Diagram


I do a fair bit of modeling with some commercial tools which can be quite heavyweight. Whenever I need to quickly sketch out a design before writing code I prefer JetUML in most cases. — Randall Hudson, Mitre Corporation


JetUML is available both as a self-contained application and as a Java archive file under the terms of the GNU General Public License v3. Download the application from the latest release page and if necessary see the installation guide. Please consider supporting the project by starring this repo and by writing an endorsement.

Privacy Policy

JetUML does not collect any information, personal or otherwise. The application only accesses the network to open web pages via the commands in the Help menu.


JetUML in the Literature