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Manatee

A Mermaid editor with live preview, AI assistance and optional GitHub sync.

Manatee workspace with Mermaid source on the left and a live diagram preview on the right.
Editor screenshot from the Manatee website. View full size

Manatee brings Mermaid source, a live diagram preview and an AI assistant into one browser workspace. The assistant can generate, edit, fix and explain diagrams, with a diff to review before applying changes.

My part

I built Manatee independently, including the editor, AI assistance and GitHub integration.

Keeping diagrams portable

Diagrams can stay in the browser or sync to a GitHub repository as plain .mmd files. GitHub sync adds version history; exports include SVG, PNG and Markdown. AI features use the user’s own provider key.