📊
🧱
Create a Class Diagram
Diagram classes and their relationships for software design.
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Preview
Start typing to see your diagram…
💡 Write diagrams in Mermaid syntax — flowcharts, sequence diagrams, Gantt charts, class diagrams, and more — and export as SVG or PNG. Rendering happens entirely in your browser; nothing is uploaded.
class diagrams tips
🧱
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.
🖼️
Export SVG for documentation that scales cleanly at any zoom.
🔒
Your architecture stays private — rendered locally.
使い方
1
入力
Enter your data into the tool above. Everything stays local to your browser.
2
処理
The tool processes your data instantly in your browser using JavaScript. No server, no waiting.
3
ダウンロード
Get your result instantly. Nothing is stored after you leave the page — complete privacy.
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