Which diagram types are supported?

Flowchart, sequence, class, ER, gantt, pie, state, journey, gitGraph and more via Mermaid.js.

How good are SVG/PNG exports?

SVG is vector-perfect; PNG can render at device pixel ratio for sharp screenshots.

No. Rendering is fully local in the browser.

How do I embed Mermaid in Markdown?

Use a fenced code block with language mermaid on GitHub, GitLab, Notion, Obsidian, Typora, etc.

What if there is a syntax error?

Check the preview error message. Common issues: missing diagram type line, unquoted special characters, wrong arrow syntax.

Mermaid Diagrams - Live Preview & Export

What can you do with it?

Draw flowcharts

Describe a process in text and render a clean flowchart for export

Visualize architecture

Sketch system architecture with Mermaid instead of heavy diagram software

Build Gantt charts

Generate project timeline visuals quickly from Gantt syntax

Enrich docs

Embed Mermaid diagrams in technical docs and README files

Share designs

Export diagrams as images for designers and non-technical teammates

Model ER diagrams

Define entity relationships and render database structure diagrams

Why choose this tool?

10+ diagram types

Flowchart, sequence, class, ER, gantt, pie and more — render instantly

Live preview

Type Mermaid on the left and preview on the right with friendly syntax feedback

Export SVG / PNG

Vector SVG and high-resolution PNG suitable for docs and slides

Stays on your device

Rendering runs fully in the browser; sensitive diagrams never leave your machine

How to use?

1

Enter Mermaid syntax

Write Mermaid in the editor — flowchart, gantt and more

2

Preview instantly

Confirm nodes and connections in the live preview

3

Export the diagram

Download PNG/SVG for docs, slides or sharing

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FAQ

Which diagram types are supported?: Flowchart, sequence, class, ER, gantt, pie, state, journey, gitGraph and more via Mermaid.js.
How good are SVG/PNG exports?: SVG is vector-perfect; PNG can render at device pixel ratio for sharp screenshots.
Is my code uploaded?: No. Rendering is fully local in the browser.
How do I embed Mermaid in Markdown?: Use a fenced code block with language mermaid on GitHub, GitLab, Notion, Obsidian, Typora, etc.
What if there is a syntax error?: Check the preview error message. Common issues: missing diagram type line, unquoted special characters, wrong arrow syntax.

Mermaid Diagrams

Workspace