Mermaid Markdown Editor

Write Mermaid diagrams in Markdown and see them rendered live—no plugins needed.

What is Mermaid?

Mermaid is a text-based diagramming language. Instead of dragging boxes in a drawing tool, you describe your diagram in code and it renders as an SVG. It's supported in GitHub README files, Notion, Obsidian, and many documentation platforms.

Easy Markdown Editor renders Mermaid blocks inline as you type—no extensions, no plugins, no setup.

Supported diagram types

  • Flowcharts (LR, TD, etc.)
  • Sequence diagrams
  • Class diagrams
  • State diagrams
  • Entity relationship diagrams
  • Gantt charts
  • Pie charts
  • Git graphs

Example

Paste this into the editor to see a flowchart:

```mermaid
flowchart TD
    A[Write Markdown] --> B[Add Mermaid block]
    B --> C[See diagram in preview]
    C --> D[Export to HTML]
```

The preview renders the flowchart immediately. When you export to HTML, the diagram is embedded as an SVG—no JavaScript required to view it.

Why use this editor for Mermaid?

  • Live preview as you type—instant feedback
  • No account or installation required
  • HTML export with diagrams as offline-ready SVGs
  • Full Markdown support alongside diagrams (code blocks, tables, etc.)
  • Privacy: documents stay in your browser, never uploaded
Try Mermaid in the Editor →

FAQ

What are Mermaid diagrams in Markdown?

Mermaid is a text-based diagramming language you can embed in Markdown using fenced code blocks. Write diagram code, and a Mermaid-compatible viewer renders it as an SVG—flowcharts, sequence diagrams, class diagrams, Gantt charts, and more.

How do I write a Mermaid diagram in Markdown?

Use a fenced code block with the language tag 'mermaid'. For example: ```mermaid flowchart LR A[Start] --> B[Process] B --> C[End] ``` Paste that into Easy Markdown Editor and the diagram renders automatically in the preview.

Can I export Mermaid diagrams to HTML or PDF?

Yes. When you download HTML from Easy Markdown Editor, Mermaid diagrams are embedded as SVGs in the file. The exported HTML works offline with no JavaScript needed. For PDF, open the HTML file in a browser and use Print → Save as PDF.