Render a Mermaid diagram

Render Mermaid source into an SVG diagram using its declared grammar.

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ToolMermaid Renderer
Input
Output
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Preview

How it works

Diagram source is parsed using the grammar selected by its declaration, transformed into an internal graph or sequence model, and rendered to SVG with layout and theme settings. Rendering converts source into a visual artifact but does not execute embedded application code.

  • SVG output scales without raster blur while theme and security settings control presentation.

Worked example

Render Flowchart
Render a Mermaid flowchart diagram
Input
											graph TD
    A[Start] --> B{Decision}
    B -->|Yes| C[OK]
    B -->|No| D[Cancel]
Output
												SVG with Start, Decision, OK, and Cancel nodes

When to use this

Documentation builds, static-site previews, and SVG snapshot tests render Mermaid source.

Edge cases

  • A syntax error prevents the diagram model from being built.
  • An unsupported declaration cannot use another grammar’s statements.
  • Large graphs can exceed browser layout or SVG limits.

References