Live editor for Mermaid diagrams — write flowcharts, sequence diagrams and more as text, see them render instantly, export as SVG or PNG.
Why we recommend it
Diagrams that live as text are easier to review, diff and keep in sync with documentation than a dragged-and-dropped canvas. Mermaid Live is the fastest way to write and preview one without setting up a local toolchain.
Strengths
- Free and open source under MIT. Instant live preview, supports a wide range of diagram types (flowcharts, ER diagrams, Gantt charts and more), one-click export and shareable links.
Drawbacks
- Layout is algorithmic, not manually adjustable — you describe relationships, not exact positions, so pixel-precise diagrams aren't the point. Syntax has a learning curve for the more advanced diagram types.
Frequently asked questions
Mermaid Live is free to use.
Yes, Mermaid Live is open source under the MIT licence.
Layout is algorithmic, not manually adjustable — you describe relationships, not exact positions, so pixel-precise diagrams aren't the point. Syntax has a learning curve for the more advanced diagram types.
Mermaid Live is best suited for Freelancer, Graphic Designer, Product Designer.
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Diagrams generated from plain-text syntax, renderable inside Markdown.
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