Mermaid Chart

Mermaid Chart is an AI gantt chart maker tool that turns prompts, docs or code into editable diagrams on one shared canvas. Mermaid Chart is a hosted diagramming app from the makers of Mermaid.js.

Mermaid Chart is the hosted product built by the team behind Mermaid.js, the open-source text-to-diagram syntax used widely in developer documentation. The web app takes a natural language prompt, an uploaded document or a pasted transcript and returns a structured diagram that can be refined from there. It supports the common diagram families: flowcharts, sequence diagrams, Gantt charts, ER diagrams, timelines, mind maps, org charts, block and state diagrams, Git graphs, user journeys, class diagrams, pie and quadrant charts. The AI is designed to pick a diagram type that suits the problem rather than defaulting to a flowchart, and it keeps context across a conversation so the diagram evolves with the thinking behind it. The editor works both ways. Users can stay in Mermaid syntax and watch the canvas lay itself out, clicking a node to jump to its code or clicking code to locate the matching shape. Non-coders can prompt inside the canvas, drag nodes, snap layouts with node alignment and reattach edges without rewriting a line. Real-time co-editing and a shareable link that requires no login make it practical for review sessions rather than solo drafting. Presentation mode lets someone create, share and walk through diagrams without exporting to another tool. Developers, data engineers, architects and DevOps teams are the obvious audience, but the homepage also targets project managers, analysts, consultants, educators and technical writers. The distinctive part is reach: diagrams render inside the IDE, embed in docs and wikis, and can be generated from Claude, VS Code and Cursor through an MCP server, with plugins for GitHub Copilot and Confluence. Compared with drag and drop diagram tools, the output is text-backed and versionable; compared with plain Mermaid.js, it adds AI drafting, a visual layer and collaboration. The product claims more than 5 million users and 200k companies, with SOC 2 compliance, encryption, access controls and SSO for enterprise buyers. Pricing tiers are not detailed on the homepage, so check the site before committing a team.