Violet UML Editor
Violet UML Editor: A focused, free UML editor for basic diagrams, with limited collaboration and interoperability. Ranked #35 of 36 in Diagram Software by our editors (6.0/10); pricing: Free plan; best for free basic UML editing.
At a glance
- Editor score6.0 / 10
- PricingFree plan
- Best forFree basic UML editing
- Free planYes
- Paid fromFree
- Facts checked20 Sep 2026
Where it wins
- Free and open source under the GNU General Public License
- Supports class, sequence, state, object, and use-case diagrams
- Runs on web, Windows, macOS, and Linux
Where it doesn't
- Exports only to PNG and JPEG
- Does not provide code generation or reverse engineering
- Limited collaboration, integrations, and XMI interoperability
Our verdict on Violet UML Editor
Violet UML Editor is a free, open-source diagram editor for developers, students, teachers, and authors who need straightforward UML modeling or documentation. It supports class, sequence, state, object, and use-case diagrams, covering several common UML formats without extending into broader diagramming. The software is available as a web version and as desktop applications for Windows, macOS, and Linux. Its source code is available under the GNU General Public License, making it a practical option for users who value freely available software and a focused UML tool.
Its main strength is breadth within basic UML editing. Users can save diagrams in Violet format and export them as PNG or JPEG images, which suits documentation, lessons, design notes, and lightweight project communication. The five supported diagram types provide a useful starting set for simple modeling. Violet stays focused on drawing rather than adding advanced model-management capabilities, so it is better suited to visualizing ideas than maintaining a detailed UML system across a larger development process.
That narrow focus also defines its limits. Violet does not include AI features, code generation, reverse engineering, semantic model checking, or interoperability with XMI-based UML tools. Its feature, integration, collaboration, and export breadth is limited, and the available image exports are restricted to PNG and JPEG. Choose Violet when free basic UML editing across major desktop platforms and the web is the priority. Teams needing deeper integrations, collaborative workflows, richer export options, or advanced software-modeling features should choose a broader alternative.
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Violet UML Editor pricing
Violet UML Editor fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Diagram types | class, sequence, state, object, use case |
| Real-time collaboration | Not verified |
| Export formats | PNG, JPEG |
| Import formats | Not verified |
| Desktop app | Yes |
| Version history | Not verified |
| Maximum editors | Not verified |
| Deployment | Cloud, Desktop |
| Platforms | Web, Windows, macOS, Linux |
| Support | Docs |
| Built for | Solo, Small business (editorial estimate) |
| Pricing | Free plan |
| Website | sourceforge.net |
| Facts checked | 20 Sep 2026 |
Alternatives to Violet UML Editor
- draw.ioA broad, flexible diagramming editor for teams that want free cross-platform coverage.9.4
- Visual ParadigmA broad modeling suite with collaboration, engineering tools, and a free plan.9.2
- LucidchartA broad, collaborative diagramming workspace with a free tier and web-only access.9.0
See all Violet UML Editor alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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