Mermaid to PNG & SVG
Put a Mermaid diagram anywhere an image works: one GET request returns a PNG or SVG, cached on a CDN. No browser or Puppeteer of your own.
- GET /img/<base64> for PNG, /svg/<base64> for SVG
- Themes, transparent background, sharp 2–3× PNGs
- Compatible with mermaid.ink URLs (base64, JSON, pako:)
- Invalid Mermaid shows its error in the image
- render_diagram tool in the AI Flowchart MCP server