# PlantUML Viewer

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

> Каноническая страница: https://elysiatools.com/ru/viewers/plantuml

- **Категория:** Диаграммы

- **Поддерживаемые форматы:** .plantuml, .puml

## Обзор

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.

## Когда использовать

- 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.

## Как это работает

- 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.

## Сценарии использования

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

## Примеры

- **Образец PlantUML**: A PlantUML sample for in-browser preview

## Частые вопросы

### 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.

## Связанные материалы

- [Просмотрщик Draw.io](https://elysiatools.com/ru/viewers/drawio): Open and preview Draw.io diagrams (.drawio, .dio) directly in your browser — no upload, no software.
- [Просмотрщик Excalidraw](https://elysiatools.com/ru/viewers/excalidraw): Open and preview Excalidraw diagrams (.excalidraw) directly in your browser — no upload, no software.
- [Просмотрщик Mermaid](https://elysiatools.com/ru/viewers/mermaid): Open and preview Mermaid diagrams (.mermaid, .mmd) directly in your browser — no upload, no software.
- [XMind Viewer](https://elysiatools.com/ru/viewers/xmind): Open and preview XMind mind maps (.xmind) directly in your browser — no upload, no software.
- [GeoJSON Viewer](https://elysiatools.com/ru/viewers/geojson): Open and preview GeoJSON geographic data (.geojson) directly in your browser — no upload, no software.
- [KML Viewer](https://elysiatools.com/ru/viewers/kml): Open and preview KML geographic data (.kml) directly in your browser — no upload, no software.