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What is Mermaid?
Mermaid is a text-based diagram syntax: you write definitions like flowcharts or sequence diagrams in plain text, and a renderer turns them into SVG. It is popular in Markdown docs, wikis, and developer tooling because diagrams stay version-controlled like code.
How to use this tool
Pick a template or write your own Mermaid block in the editor. The preview updates shortly after you pause typing. Use Share for a link, Save snapshot for named backups on this device, and export SVG or PNG for slides or docs. Prefer the compact toolkit layout? Open the editor at /mermaid—it is the same experience.
Use cases
API sequence diagrams, deploy and runbooks, onboarding flows, architecture sketches in READMEs, and quick flowcharts for incident reviews.
Privacy and security
Rendering runs in your browser; your diagram text is not sent to our servers for the core editor workflow. Optional short-share links store a compressed payload in configured backend storage with TTL—see the full tool page for details. Clear sensitive diagrams on shared machines.