Does this use AI to generate the diagram?

No. It runs the Mermaid rendering engine in code, so the diagram is produced deterministically from your syntax. The same input always renders the same output.

Can I export the diagram as an image?

Yes. You can download a scalable SVG or a high-resolution PNG, and you can copy the raw SVG markup to the clipboard.

Is my Mermaid code uploaded anywhere?

No. Parsing and rendering happen entirely in your browser, so your diagrams never leave your device.

Why isn't my diagram rendering?

Mermaid is strict about syntax. The tool validates your code and shows the parser error inline — check the diagram type on the first line and the arrow or node syntax it points to.

All tools/Convert

Mermaid → Diagram

Runs locally

Turn Mermaid text into a rendered flowchart, sequence, class, Gantt, pie, or state diagram. Live preview, pan & zoom, theme and background controls, export to SVG or PNG. 100% local — no AI, no upload.

Mermaid code

Diagram

Background

Your diagram appears here. Type Mermaid on the left or pick a sample.

Render Mermaid syntax into a real diagram in your browser. Paste a flowchart, sequence, class, state, Gantt, or pie definition and see it draw live, then export to SVG or PNG. Rendering is fully deterministic — it runs the Mermaid engine in code, with no AI and nothing uploaded.

How to render a Mermaid diagram

1Type or paste your Mermaid code, or pick a sample to start from.
2Watch the diagram render live as you edit; syntax errors are shown inline.
3Export the result as a vector SVG or a high-resolution PNG.

Diagrams from plain text, no AI

Mermaid is a text-based diagramming syntax — you describe nodes and edges in code and a layout engine draws the chart. This tool runs that same engine locally, so the output is repeatable and exact: the same input always produces the same diagram. There's no model guessing at your intent, no API call, and no upload, which makes it safe for diagrams of private systems and architecture.

Which diagram types are supported?

It supports the core Mermaid diagram types: flowcharts, sequence diagrams, class diagrams, state diagrams, Gantt charts, and pie charts. Paste an existing definition from a README, GitHub issue, or docs and render it without installing anything.

Frequently asked questions

Does this use AI to generate the diagram?: No. It runs the Mermaid rendering engine in code, so the diagram is produced deterministically from your syntax. The same input always renders the same output.
Can I export the diagram as an image?: Yes. You can download a scalable SVG or a high-resolution PNG, and you can copy the raw SVG markup to the clipboard.
Is my Mermaid code uploaded anywhere?: No. Parsing and rendering happen entirely in your browser, so your diagrams never leave your device.
Why isn't my diagram rendering?: Mermaid is strict about syntax. The tool validates your code and shows the parser error inline — check the diagram type on the first line and the arrow or node syntax it points to.