Mermaid Diagram Drawing Tools

Here are the best free options for viewing Mermaid diagrams:

Currently Free Options

1. MermaidViewer.com (Best Free Option)

• Free tier includes: 3 diagrams, 5 AI conversations per day, basic sharing
• No signup required to start using immediately
• Real-time preview as you type
• Privacy-focused - data stays in your browser
• URL: https://mermaidviewer.com/

2. Mermaid-Drawing.com

• Completely free online editor
• Real-time preview and export functionality
• Multiple diagram types: flowcharts, sequence diagrams, class diagrams, etc.
• URL: https://mermaid-drawing.com/

3. DevTools Daily Playground

• Free MermaidJS playground with examples
• Learn-focused with sample diagrams to explore
• URL: https://www.devtoolsdaily.com/diagrams/mermaidjs/playground/

4. Ikalas Mermaid Live Editor

• Free online editor for creating and previewing diagrams
• Simple interface without signup requirements
• URL: https://ikalas.com/app/mermaid-live-editor

5. Miro (Limited Free Plan)

• Free plan available with unlimited team members
• Mermaid diagram editor as part of broader diagramming tools
• Collaborative features included in free tier
• URL: https://miro.com/diagramming/mermaid-diagram/

Browser Extensions & Local Options

VS Code Extensions

• Mermaid Preview extension (completely free)
• Mermaid Markdown Syntax Highlighting

GitHub Integration

• Native Mermaid support in GitHub markdown (completely free)
• Just use ```mermaid code blocks in your README files

Recommendation

For quick viewing and editing, I'd recommend MermaidViewer.com as it offers: - No signup required - Real-time preview - Clean, focused interface - Privacy-focused approach - Reasonable free tier limits

For learning and experimentation, mermaid-drawing.com appears to be completely free without restrictions.

The landscape has definitely changed since mermaid.live became more restrictive, but these alternatives should meet most free diagram viewing needs!