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Create a Class Diagram

Diagram classes and their relationships for software design.

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πŸ’‘ Write diagrams in Mermaid syntax β€” flowcharts, sequence diagrams, Gantt charts, class diagrams, and more β€” and export as SVG or PNG. Rendering happens entirely in your browser; nothing is uploaded.

class diagrams tips

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Define classes with fields and methods, then use "<|--" to show inheritance.

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Keep design docs in version control by storing the diagram as text.

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Export SVG for documentation that scales cleanly at any zoom.

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Your architecture stays private β€” rendered locally.

How It Works

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3
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Why use ours?

βœ“Completely free β€” no hidden costs, ever
βœ“No account, email, or login required
βœ“Files never leave your device
βœ“No file size limits whatsoever
βœ“No watermarks on any output

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