UML Diagram Generator

Generate UML diagrams from PlantUML code instantly. Supports class, sequence, use case diagrams and more.

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Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

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About This Tool

This UML Diagram Generator allows you to create professional UML diagrams directly from PlantUML code. Simply paste your PlantUML syntax or upload a .puml file, and the tool will generate a visual diagram in real-time. The tool supports various diagram types including class diagrams, sequence diagrams, use case diagrams, activity diagrams, and more. All processing happens client-side for privacy and speed. You can download the generated diagram as PNG or SVG, and copy the PlantUML code for reuse.

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How to Use

Enter PlantUML code in the text area or upload a .puml file
Select the diagram type from the dropdown (optional, auto-detected)
Click 'Generate Diagram' to create the visual UML diagram
View the result, download as PNG/SVG, or copy the code
Use the 'Clear' button to start over

Frequently Asked Questions

Find Quick Answers

What is PlantUML?

PlantUML is a text-based language for creating UML diagrams. Instead of drawing diagrams manually, you write simple text descriptions that are automatically converted to diagrams.

What UML diagram types are supported?

The tool supports all PlantUML diagram types including class diagrams, sequence diagrams, use case diagrams, activity diagrams, component diagrams, state diagrams, object diagrams, and deployment diagrams.

Are my PlantUML code and diagrams stored on your servers?

No, all processing happens entirely in your browser. Your code and generated diagrams never leave your device, ensuring complete privacy.

Can I download the generated diagrams?

Yes, you can download the generated UML diagram as PNG or SVG format. The download buttons appear below the generated diagram in the results section.

What file formats can I upload?

You can upload .puml files containing PlantUML code. The tool also accepts plain text input directly in the text area.

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