Convert Mermaid to PDF

PDF is the format for anything that gets printed, attached, or formally reviewed: architecture documents, audit artifacts, and reports. The page is sized to your diagram automatically (landscape or portrait), so there's no awkward cropping.

How it works

1. Paste (or write) your Mermaid code in the editor — the preview renders live.
2. Check the preview. If you see a syntax error, fix the highlighted line or open the code in the full editor and use AI repair.
3. Click “Download PDF”. The diagram is rendered at 2× resolution onto a page matched to its dimensions.

Frequently asked questions

How do I convert a Mermaid diagram to PDF?

Paste your Mermaid code into the converter above and click Download PDF. The diagram is rendered with Mermaid.js in your browser, rasterised at 2× resolution, and placed on a PDF page sized to the diagram — no signup or upload required.

Is this converter free?

Yes, the converter is free and requires no account. If you want to keep editing the diagram, the 'Open in editor' button takes the same code into MermaidCreator's free visual + code editor.

Is my diagram uploaded to a server?

No. The conversion runs entirely in your browser: Mermaid.js renders your code to SVG locally and the download is produced on your machine. Your diagram code never leaves your computer.

What page size does the PDF use?

The PDF page is sized to the diagram itself: wide diagrams produce a landscape page and tall diagrams a portrait page, with the image filling the page exactly. This avoids the white margins and cropping you get from forcing diagrams onto A4 or Letter.

More free Mermaid tools

• Mermaid to PNG converter
• Mermaid to SVG converter
• Mermaid cheat sheet — copy-paste syntax for every diagram type
• Diagram templates — ready-made starting points