About Mermaid Chart
Mermaid Chart is a web app for creating diagrams from text prompts, code or uploaded documents. It is made by the team behind the open source Mermaid.js library.
What it does
You describe a diagram in plain language, paste Mermaid code, or upload a document, and the tool builds the diagram on a canvas. AI suggests a diagram type that fits what you are modeling, such as a flowchart, timeline or sequence diagram. Teams can co-edit a diagram in real time and share it with a link, and the diagram can be generated from Claude, VS Code or Cursor through its MCP server.
Key features
- Prompt-based diagram creation
- Flowcharts, sequence diagrams and more
- Real-time co-editing on one canvas
- Share a diagram with a single link
- MCP server for Claude, VS Code and Cursor
Who it's for
Product managers, engineers, analysts and educators who need diagrams quickly. Teams that already write Mermaid code can keep their syntax and use the visual editor alongside it.
Pricing and good to know
The site offers a start free option, with sign in through Google or GitHub, and it lists plans for teams and companies. It mentions SOC 2 compliance and single sign-on for business use. The open source Mermaid.js project it grows from is a separate product.
Highlights
- Creates diagrams from a text prompt or code
- Offers flowchart, sequence and timeline types
- Co-edits a diagram with others in real time
- Shares a diagram with a single link
- Generates diagrams from Claude, VS Code and Cursor
