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Violet UML Editor
What it is
Violet UML Editor is a free, open-source tool for drawing simple UML diagrams. It supports class, activity, object, sequence, state, and use case diagrams. The project describes it as easy to learn and use, and says it is intended for people who need straightforward diagrams quickly. Its stated audience includes developers, students, teachers, and authors. Violet is licensed under GNU General Public License version 2.0 and is written in Java, with Java Swing and Java SWT listed as interface options. The project names Linux, Mac, and Windows as supported operating systems, and its platform listing also includes web. Users are directed to SourceForge for downloads. Building the software from source requires Java Development Kit 17 or later and Maven 3 or later; the repository specifies running `mvn clean package` from its root directory to compile and package it. The maintainer invites contributions through pull requests and says contributors will be contacted after their request is examined.
For and against
For
- Free and open source under GPLv2
- Supports six UML diagram types
- Available for Linux, Mac, and Windows
- Contributions are invited through pull requests
Against
- Building from source requires JDK 17 or later
- Building from source requires Maven 3 or later
- Downloads are directed to SourceForge
The verdict
Violet focuses on drawing a defined set of simple UML diagrams and is available without a listed charge. Check its supported diagram types and download route to see whether they meet your needs.
Who it suits
Violet may suit developers, students, teachers, and authors who need simple UML diagrams. It is also relevant to contributors interested in an open-source Java project.
Plans and prices
Violet UML Editor
Completely free · cross-platform UML editor
Read 4 Oct 2026 · sourceforge.net
On the record
- Audience
- Violet is intended for developers, students, teachers, and authors who need simple UML diagrams quickly.sourceforge.net · read 4 Oct 2026
- Build process
- The repository says to run `mvn clean package` from the root directory to compile and package the project.github.com · read 4 Oct 2026
- Build requirements
- The repository says building from source requires Java Development Kit 17 or greater and Maven 3 or greater.github.com · read 4 Oct 2026
- Contributions
- The maintainer invites contributors to submit pull requests and says they will examine the request and contact the contributor.github.com · read 4 Oct 2026
- Diagram appearance
- The project says Violet draws nice-looking diagrams.sourceforge.net · read 4 Oct 2026
- Download source
- The source code repository directs users to SourceForge to download and use the software.github.com · read 4 Oct 2026
- Ease of use
- The project describes Violet as easy to learn and use.sourceforge.net · read 4 Oct 2026
- Interface
- The project lists Java Swing and Java SWT as user interfaces.sourceforge.net · read 4 Oct 2026
- License
- The project is licensed under GNU General Public License version 2.0 (GPLv2).sourceforge.net · read 4 Oct 2026
- Operating systems
- The project lists Linux, Mac, and Windows as supported operating systems.sourceforge.net · read 4 Oct 2026
- Programming language
- The project lists Java as its programming language.sourceforge.net · read 4 Oct 2026
- Purpose
- Violet is a UML editor for drawing simple diagrams quickly.sourceforge.net · read 4 Oct 2026
