React-based Mermaid diagram viewer designed around database schema review.

• Live Mermaid rendering with a layout tuned for erDiagram workflows
• Local file-open workflow for .mmd, .mermaid, .md, and .txt Mermaid sources
• Inline relationship legend, schema stats, and SVG export
• Responsive three-panel workspace built with React and Vite

npm install
npm run dev

Build for production:

npm run build

• The preview is optimized for Mermaid ER syntax, but it will still attempt to render other Mermaid diagram types.
• Files are opened in the browser and kept editable in the source panel. Changes are not written back to disk.
• SVG export downloads the current rendered diagram from the preview stage.