Mermaid to PDF 100% local
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Paste Mermaid code or Markdown diagrams, preview them, then export PDF locally.
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Supports .md, .markdown, .txt, and .pdf files

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Mermaid to PDF converter

Convert Mermaid to PDF for flowcharts, sequence diagrams, and architecture docs.

MarkDone turns Mermaid syntax into a clean PDF with live preview, so you can export flowcharts, sequence diagrams, ERDs, class diagrams, Gantt charts, and Markdown documents that contain Mermaid blocks. The converter runs in your browser, which keeps private architecture notes, API flows, product diagrams, and process maps on your device.

Diagram-first PDF exportTurn Mermaid source into a printable PDF without taking screenshots.
Preview before downloadCheck spacing, labels, and diagram readability before creating the PDF.
Private by defaultArchitecture diagrams, workflows, and API flows stay inside your browser.
All MarkDone converters Markdown to PDF converter README to PDF converter Markdown PDF privacy guide MarkDone blog

How to convert Mermaid to PDF

  1. Paste Mermaid syntax directly, or paste Markdown with a fenced mermaid code block.
  2. Use the live preview to confirm that the diagram renders the way you expect.
  3. Download a PDF that includes the rendered Mermaid diagram and any surrounding Markdown content.

Mermaid diagrams this converter is built for

Use it for flowcharts, sequence diagrams, class diagrams, state diagrams, entity relationship diagrams, Gantt charts, and common Mermaid blocks used in engineering notes, product specs, and technical documentation.

Why not just screenshot a Mermaid diagram?

A PDF is easier to archive, print, attach to tickets, share with non-technical teammates, and keep next to written documentation. MarkDone keeps the Mermaid source editable while giving you a document-style export instead of a manual screenshot workflow.

Mermaid example for an API sequence diagram

Paste a diagram block by itself when you only need the visual, or keep it inside a larger Markdown document when the PDF should include the explanation around it.

example.md 
```mermaid
sequenceDiagram
  participant Client
  participant API
  participant Queue
  Client->>API: POST /exports
  API->>Queue: create PDF job
  Queue-->>API: job complete
  API-->>Client: download link
```
Example PDF output
API export sequence

Mermaid to PDF for architecture and API docs

Export system diagrams for pull requests, onboarding pages, API handoff notes, incident reviews, database sketches, release plans, and decision records. The page is focused on visual Mermaid output, while the Markdown converter is better for prose-heavy documents.

Mermaid inside Markdown documents

When a diagram belongs inside a longer document, put it in a fenced mermaid block and export the full Markdown file. This is useful for README-style docs, design notes, architecture decisions, and AI-generated technical drafts that combine text, code, and diagrams.

Tips for readable Mermaid PDF output

Keep large systems split into smaller diagrams, use short labels, avoid extremely wide left-to-right flows, and check the preview before downloading. Smaller focused diagrams usually make better PDFs than one giant system map.

Is my Mermaid diagram uploaded when I create a PDF?

No. Mermaid to PDF conversion runs locally in your browser. Your diagram source stays on your device.

Which Mermaid diagram types are supported?

MarkDone supports common Mermaid syntax including flowcharts, sequence diagrams, class diagrams, state diagrams, entity relationship diagrams, and Gantt charts.

Can I export Mermaid diagrams inside a Markdown document?

Yes. Add a fenced mermaid code block inside Markdown, preview the full document, and export the diagram together with headings, text, tables, and code blocks.

How do I make a Mermaid PDF easier to read?

Keep each diagram focused, avoid extremely wide flows, use clear node labels, and check the live preview before exporting. Large systems usually work better as several smaller diagrams.

Is Mermaid to PDF better than taking a screenshot?

A PDF is easier to share, print, archive, and include with written documentation. MarkDone lets you keep the Mermaid source and export the rendered diagram without a screenshot workflow.