Is Mermaid AI Playground free?

Yes, Mermaid AI Playground is completely free to use. No account, registration, or payment is required. All 22 diagram types and AI features are available at no cost.

What diagram types does Mermaid AI Playground support?

Mermaid AI Playground supports all 22 Mermaid v11 diagram types: flowchart, sequence, class, state, ER, Gantt, journey, pie, gitGraph, timeline, mindmap, quadrant chart, requirement, sankey, block, packet, kanban, architecture, XY chart, C4, and ZenUML.

Can I use Mermaid AI Playground with ChatGPT?

Yes! Mermaid AI Playground provides an MCP server at www.mermaid.help/api/mcp that works with ChatGPT Apps, Claude via MCP, Cursor, Windsurf, and other AI assistants that support the Model Context Protocol.

How does the AI diagram generation work?

The AI uses Google Gemini to convert your natural language description into valid Mermaid diagram code. It can also fix syntax errors and enhance existing diagrams for clarity.

Terms of Service | Mermaid AI Playground

Acceptance

By using Mermaid AI Playground ("mermaid.help"), you agree to these terms. If you do not agree, please do not use the service.

Service Description

Mermaid AI Playground is a free web application for creating, editing, fixing, and enhancing Mermaid diagrams using AI. The service is provided "as-is" without warranties of any kind.

Free Usage

The service is free to use for personal and commercial purposes. No account, registration, or payment is required. We reserve the right to introduce usage limits if necessary to maintain service quality.

MCP & API Access

The MCP server endpoint is provided for integration with AI assistants (ChatGPT Apps, Claude, Cursor, etc.). Automated or programmatic access is permitted for personal and commercial use. Do not abuse the API with excessive requests that degrade service for others.

Your Content

You retain all rights to the diagram code you create. We do not claim ownership of any content you generate or process through the service. Diagram code is processed in real-time and is not stored.

AI-Generated Content

AI-generated diagrams are provided for informational purposes. While we strive for accuracy, AI output may contain errors. You are responsible for reviewing and validating any AI-generated content before using it in production.

Limitation of Liability

Mermaid AI Playground is provided "as-is" without warranty. We are not liable for any direct, indirect, incidental, or consequential damages arising from use of the service.

Changes

We may update these terms from time to time. Continued use of the service constitutes acceptance of the updated terms.

Contact

For questions about these terms, contact mihir@bug59.com.