Mermaid is a text-based diagramming language that uses Markdown-like syntax to create flowcharts, sequence diagrams, Gantt charts, class diagrams, and more. It's widely integrated in GitHub, GitLab, and Notion.

How do I use the Mermaid editor?

Enter Mermaid syntax in the left editor panel. The diagram renders automatically in the right panel. You can export as SVG or copy the Mermaid code for Markdown documents.

What diagram types are supported?

Flowchart, sequenceDiagram, gantt, classDiagram, stateDiagram, pie, erDiagram, gitGraph and more.

Free Online Mermaid Diagram Editor - Flowchart, Sequence, Gantt Charts

📖 How to Use

Edit code: Enter Mermaid syntax in the left panel, preview updates in real-time.

Use presets: Click preset buttons to load examples.

Export: Download as SVG or copy code for Markdown documents.

❓ FAQ

What is Mermaid?

Mermaid is a text-based diagramming language integrated in GitHub, GitLab, and Notion. Create diagrams using simple Markdown-like syntax.

How to use the editor?

Enter Mermaid syntax in the left panel, the diagram renders automatically on the right. Export as SVG or copy code.

Supported diagram types?

Flowchart, sequenceDiagram, gantt, classDiagram, pie, stateDiagram, erDiagram, gitGraph and more.

Can I use exported SVGs commercially?

Yes. Diagrams you create belong to you and can be used for any purpose.