Diagram Maker
Draw flowcharts, sequence, ER and Gantt diagrams from text and save them as SVG or PNG (Mermaid syntax). Your text is never sent to a server.
The diagram is built inside this browser; the text you type is not sent or stored on the server.
Preview
FAQ
Is my text sent to a server?
No. The diagram is built in your browser and this page has no code that sends your text. No share links are created either.
Where do I learn the syntax?
Load an example above and edit it. The full syntax is in the official docs (mermaid.js.org).
My PNG looks blurry.
Raise the scale to 2×–3×. Anything beyond 4096px on the long side is scaled down automatically. For sharp zooming, save as SVG.