Diagram Generator renders text-based diagram source code into SVG or PNG images with a permanent shareable URL. Mermaid, PlantUML, Graphviz DOT, D2, C4-PlantUML, ERD, DBML, and more — one tool for every diagram format.
Writing a diagram in code is faster than dragging boxes in a GUI, but rendering it usually requires installing tools or finding an online editor. This tool takes the source code and returns a rendered image plus a permanent URL you can embed in docs, wikis, or presentations without hosting anything yourself.
What you can do
- generate_diagram — render any diagram from text source in Mermaid, PlantUML, Graphviz DOT, D2, C4-PlantUML, ERD, DBML, blockdiag, seqdiag, or actdiag
Who it's for
Developers documenting system architecture, technical writers creating process flows, data engineers modeling schemas, and anyone who prefers writing diagrams in code over drag-and-drop tools.
How to use it
- Write your diagram source code in any supported format
- Use generate_diagram and pass the source and type (default is mermaid)
- Choose format: svg for scalable output that works at any size, png for raster images
- The response includes a diagram_url — a permanent link that renders the diagram on demand, ready to embed anywhere
Getting started
No setup needed. Start with Mermaid if you're not sure which format to use — it's the most readable and covers flowcharts, sequence diagrams, class diagrams, and Gantt charts.
