MermaidChart

MermaidChart is a web-based diagramming tool that converts plain text descriptions into visual diagrams in seconds. It is built on the open-source Mermaid.js library and offers three primary modes of diagram creation: an AI-powered text-to-chart interface, a code editor using Mermaid syntax, and a drag-and-drop visual editor. The platform supports a wide range of diagram types, including flowcharts, sequence diagrams, class diagrams, Gantt charts, state diagrams, pie charts, user journey maps, git graphs, entity relationship diagrams, and mind maps. Each diagram is rendered as a "living" graphic that can be edited, versioned, and shared directly from the browser. Users can start from a blank canvas or prompt the AI with natural language descriptions such as "show the login process as a flowchart" to generate an initial diagram. The AI understands context and can refine diagrams through follow-up instructions. The code editor allows users to write or paste Mermaid code, with syntax highlighting and live preview, making it suitable for developers who want precise control. The visual editor provides a WYSIWYG environment where nodes and connections can be moved, resized, and styled using a sidebar palette. MermaidChart integrates with popular platforms like GitHub, GitLab, Notion, Confluence, and Slack through embeddable links or direct sync. Diagrams stored in the cloud can be embedded in documentation, wikis, or team channels, and they update automatically when changed. The tool also supports real-time collaboration: multiple users can edit the same diagram simultaneously, with changes reflected instantly and a history log for rollback. The platform is used by over 5 million individuals and 200,000 companies across roles such as software developers, data engineers, produ