A lightweight desktop application for interactively creating and editing diagrams in the Unified Modeling Language. The idea of JetUML is to support 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. Currently supports Class diagrams, Sequence diagrams, State diagrams, Object diagrams, and Use case diagrams.

If you find this tool useful please star the repo.

JetUML is available under the terms of the GNU General Public License v3.

JetUML is available both as a self-contained application and as a Java archive file. Download the application from the latest release page and if necessary see the installation page. Users upgrading from a previous version might want to peek at the compatibility guide

JetUML collects no information whatsoever. We rely on you to estimate usage levels and receive feedback. If you use JetUML, please star the repo. If you use the project for teaching or research, please also let us know.

If you are interested in getting involved in the JetUML project, please see the Contributing Guidelines.

Articles that refer to JetUML. To include missing references please submit a pull request.

• M.P. Robillard and K. Kutschera. Lessons Learned in Migrating from Swing to JavaFX. IEEE Software, 2019. Reports on the experience of migrating the GUI to JavaFX. (pdf)

• D. Marmsoler and A. Petrovska. Detecting Architectural Erosion using Runtime Verification. In Proceedings of the 12th Interaction and Concurrency Experience Workshop, 2019. Applies a verification method to JetUML. (pdf)

• Q. Wang, Y. Brun, A. Orso. Behavioral Execution Comparison: Are Tests Representative of Field Behavior?. In Proceedings of the 10th IEEE International Conference on Software Testing, Verification, and Validation, 2017. Analyzes JetUML's test suite. (pdf)

• M.P. Robillard. Sustainable Software Design. In Proceedings of the 24th ACM SIGSOFT International Symposium on the Foundations of Software Engineering, 2016. Discusses some of JetUML's design decisions. (pdf)