Privacy

Mermaid renders and exports Mermaid diagrams in your browser. Draft text may be stored in localStorage on your device (keyed by a site-specific prefix such as mermaid). Share and embed links encode diagram source in the URL hash; the site does not store those diagrams on a server.

The optional blog, admin, and feedback forms run on the server. Do not put secrets in public blog posts or feedback messages.

We do not sell personal data. Optional product analytics (when enabled via site config) only send event names and safe metadata such as export type or locale — never Mermaid diagram source. Ads, if enabled, are disclosed here and in the environment configuration.

This page summarizes how diagram data is handled today. Use Feedback if you need a jurisdiction-specific privacy statement.