How do I convert a Mermaid diagram to PDF?

Write your Mermaid diagram definition inside a fenced code block with the mermaid language tag in the Markdown editor. The diagram renders in real time in the preview panel. Click Export PDF to download a PDF containing both your text and the rendered diagram.

What Mermaid diagram types are supported?

The converter supports all major Mermaid diagram types: flowcharts, sequence diagrams, class diagrams, state diagrams, entity relationship diagrams, Gantt charts, pie charts, quadrant charts, requirement diagrams, and Git graphs.

Will the diagram resolution be good enough for printing?

Yes. Diagrams are rendered as vector graphics within the PDF, so they remain crisp and sharp at any zoom level or print resolution. There is no pixelation or quality loss.

Can I use custom styling or themes for my diagrams?

Yes. Mermaid themes and themeVariables are fully supported. You can customize colors, fonts, and layout parameters directly in your Mermaid configuration block.

Is there a limit on how complex a diagram can be?

There is no artificial limit. Very large diagrams may render more slowly depending on your browser, but the tool can handle diagrams with hundreds of nodes and edges.

Mermaid to PDF Converter

Turn Mermaid.js diagrams into exportable PDFs — flowcharts, sequence diagrams, Gantt charts, and more.

Start Converting →

Why Convert Mermaid Diagrams to PDF?

Mermaid.js has become the standard way to define diagrams in Markdown. Developers write flowcharts, sequence diagrams, class hierarchies, and Gantt charts as plain text inside code blocks, making them version-controllable and reviewable in pull requests. But when it comes to sharing those diagrams with stakeholders, clients, or team members who do not use Markdown editors, a PDF is the reliable universal format. PDFs render identically on every device, print without issues, and can be annotated with comments and highlights.

Our Mermaid to PDF converter brings these two worlds together. You write your Mermaid definitions in the same Markdown editor where you compose your documentation. The diagrams render live in the preview pane, so you see exactly how they will look. When you export to PDF, every diagram is embedded as a crisp vector graphic alongside your text, producing a professional document ready for distribution.

Supported Diagram Types

Flowcharts

Directed and undirected graphs with multiple node shapes, subgraphs, links, and styling.

Sequence Diagrams

Actor interactions, messages, notes, loops, alt/opt fragments, and activation boxes.

Gantt Charts

Task timelines with dependencies, milestones, sections, and date formatting.

Class & State Diagrams

UML class relationships, inheritance, interfaces, state transitions, and composite states.

How It Works

Compose your Markdown with embedded Mermaid code blocks. Use the ```mermaid fenced code block syntax to define each diagram.
Watch the live preview render your diagrams as you type. The preview updates instantly with every change to your Mermaid definitions.
Iterate on your diagrams until the layout and content are perfect. The editor supports all Mermaid configuration options including themes and custom styles.
Export to PDF with one click. The PDF preserves all diagrams as scalable vector graphics, so they stay sharp whether viewed on screen or printed.

Common Use Cases

Software architecture docs: Include architecture diagrams and data flow charts in your technical documentation exports.
Project planning: Create Gantt charts for project timelines and export them as PDFs for stakeholder presentations.
API documentation: Illustrate API workflows and request-response sequences with sequence diagrams in your API docs PDFs.
Educational content: Build class diagrams and state machines for course materials and export them as print-ready handouts.
Engineering reports: Combine process flowcharts with written analysis in a single downloadable PDF report.

Frequently Asked Questions

Do I need to know Mermaid syntax to use this converter?

Basic familiarity with Mermaid helps, but the editor includes syntax examples and the live preview makes it easy to learn. You can start with simple flowcharts and gradually explore more advanced diagram types.

Can I include multiple diagrams in one PDF?

Absolutely. You can embed any number of Mermaid diagrams throughout your Markdown document. Each diagram renders independently, and the PDF export includes all of them.

Will diagrams with custom fonts render correctly in the PDF?

Yes. The PDF generation captures the diagram as rendered in your browser, so any fonts available on your system or loaded via CSS will appear correctly in the output.

Can I edit a diagram after exporting?

Since Mermaid sources are written as plain text, you can always return to the editor, modify the Mermaid code, and re-export. The source remains editable because it is text, not a binary drawing file.

Is there support for dark mode or custom themes?

Yes. Mermaid theme configuration and themeVariables are fully supported. You can customize colors, line widths, node styles, and more through the Mermaid configuration block at the top of your diagram definition.

Convert Mermaid to PDF Now →