# PlantUML Viewer

Free online PlantUML viewer. Open and preview PlantUML diagrams (.plantuml, .puml) directly in your browser — no upload, no software.

> Page canonique: https://elysiatools.com/fr/viewers/plantuml

- **Catégorie:** Diagrammes

- **Formats pris en charge:** .plantuml, .puml

## Présentation

This PlantUML viewer renders text-based UML diagrams directly in your browser. PlantUML (.plantuml, .puml) uses a simple text syntax to create sequence diagrams, use case diagrams, class diagrams, activity diagrams and more. Pick a sample diagram or choose your own .plantuml / .puml file to preview it instantly, with no upload.

## Quand l'utiliser

- You received a .puml file and want to render it visually.
- You need a quick, private preview of a UML diagram.
- You want to check a PlantUML diagram from documentation.

## Fonctionnement

- Select a built-in sample diagram or choose your own .plantuml / .puml file.
- The viewer renders the diagram in your browser — nothing is uploaded.
- Inspect the rendered UML diagram.

## Cas d'usage

- Previewing sequence and activity diagrams.
- Checking class and use case diagrams.
- Inspecting PlantUML from documentation.

## Exemples

- **PlantUML d'exemple**: A PlantUML sample for in-browser preview

## Questions fréquentes

### What is a PlantUML file?

PlantUML (.plantuml, .puml) is a text-based diagramming format that uses simple syntax to generate UML diagrams — sequence, use case, class, activity, component, state and deployment diagrams. It is widely used in software documentation.

### Are my PlantUML files uploaded?

The diagram text stays on your device. Without a configured PlantUML server, the viewer shows a placeholder. For full rendering, a PlantUML server URL must be configured in options.

### What diagram types does PlantUML support?

PlantUML supports sequence, use case, class, activity, component, state, deployment, object, timing, network, architecture and wireframe diagrams, Gantt charts and mind maps — all from text syntax.

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