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Home/Tools/Playgrounds/Mermaid Diagram Editor

Mermaid Diagram Editor

Create and preview Mermaid diagrams online. Write flowcharts, sequence diagrams, Gantt charts and more with live preview. Free browser-based tool — no data sent to servers.

Your data never leaves your browser

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Frequently Asked Questions

What diagram types does Mermaid support?

Flowcharts, sequence diagrams, class diagrams, state diagrams, Gantt charts, pie charts, ER diagrams, gitGraph and more.