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SPECIFICTION
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Violet UML Editor

github.com

Free plan WebWindowsmacOSLinux
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Spec score 7.3 #19 of 26 in UML Modeling Software

What it is

Violet UML Editor is a free, open-source application for drawing simple UML diagrams quickly. It supports class, activity, object, sequence, state and use case diagrams. The project describes Violet as easy to learn and use, and intended for developers, students, teachers and authors who need straightforward UML diagrams. Violet is licensed under GNU General Public License version 2.0 (GPLv2) and is written in Java, with Java Swing and Java SWT listed as interfaces. Linux, Mac and Windows are named operating systems, while the platform listing also includes web. The source repository directs users to SourceForge for downloads. Building from source requires Java Development Kit 17 or greater and Maven 3 or greater; the repository specifies running `mvn clean package` from the root directory to compile and package the project. The maintainer invites contributors to submit pull requests and says requests will be examined before contacting contributors. Violet has one listed plan: free, described as a completely free, cross-platform UML editor. Deployment is listed as both, with web, Windows and Linux among supported platforms.

Spec sheet

Purpose
Violet is a UML editor for drawing simple diagrams quickly.Read 4 Oct 2026 · sourceforge.net
Audience
Violet is intended for developers, students, teachers, and authors who need simple UML diagrams quickly.Read 4 Oct 2026 · sourceforge.net
License
The project is licensed under GNU General Public License version 2.0 (GPLv2).Read 4 Oct 2026 · sourceforge.net
Build process
The repository says to run `mvn clean package` from the root directory to compile and package the project.Read 4 Oct 2026 · github.com
Build requirements
The repository says building from source requires Java Development Kit 17 or greater and Maven 3 or greater.Read 4 Oct 2026 · github.com
Contributions
The maintainer invites contributors to submit pull requests and says they will examine the request and contact the contributor.Read 4 Oct 2026 · github.com
Diagram appearance
The project says Violet draws nice-looking diagrams.Read 4 Oct 2026 · sourceforge.net
Download source
The source code repository directs users to SourceForge to download and use the software.Read 4 Oct 2026 · github.com
Ease of use
The project describes Violet as easy to learn and use.Read 4 Oct 2026 · sourceforge.net
Interface
The project lists Java Swing and Java SWT as user interfaces.Read 4 Oct 2026 · sourceforge.net
Operating systems
The project lists Linux, Mac, and Windows as supported operating systems.Read 4 Oct 2026 · sourceforge.net
Programming language
The project lists Java as its programming language.Read 4 Oct 2026 · sourceforge.net

Plans and prices

Violet UML Editor Free Completely free · cross-platform UML editor Read 4 Oct 2026 · sourceforge.net

Every Violet UML Editor plan and price →

Strong points and limits

Strong points

  • Completely free and open source
  • Supports six UML diagram types
  • Runs on Linux, Mac and Windows
  • Java Swing and SWT interfaces listed
  • Source contributions accepted through pull requests

Limits

  • Building from source requires JDK 17 or greater
  • Maven 3 or greater is required to build
  • The project focuses on simple diagrams

Who it suits

Violet suits developers, students, teachers and authors who need simple UML diagrams. It is suitable for users seeking a free, open-source editor across listed desktop and web platforms.

Verdict

Violet UML Editor provides free UML drawing with broad diagram-type and platform listings. Source builders need current Java and Maven requirements, while downloads are directed through SourceForge.

Where Specifiction places it

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