Free online Mermaid diagram viewer and editor with live preview, AI generation, and exports
Desktop visual editor for responsive websites and native app interfaces
Stage
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Founded
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Based in
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Pricing model
Freemium
Free
Pricing
Free: unlimited editor and preview, 3 saved diagrams, 5 AI uses total, PNG export 1× with watermark. Starter: $6.99/month or $69.90/year; 30 saved diagrams, 500 AI conversations per month, PNG export up to 4× without watermark. Pro: $11.99/month or $119.90/year; unlimited diagrams, unlimited AI, PNG
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Key features
Live preview of Mermaid code as you type
AI diagram generator, editor and syntax fixer
PNG export on every plan; JPG, SVG and PDF on Pro
All 22+ Mermaid diagram types supported
Share diagrams via public links and embeds
Save diagrams to cloud with folders and version history
Keyboard shortcuts and autocomplete
Mobile-responsive editor with pan and pinch-zoom
Export to HTML/CSS for websites
Export to SwiftUI for iOS apps
Export to Jetpack Compose for Android apps
Responsive design with breakpoints
Reusable components and design systems
Connected tokens for variables
Optional AI assistance through MCP
Publish to GitHub Pages, Vercel, Cloudflare Pages, or Netlify
Native app publishing workflows for App Store and Google Play
What makes it different
No account or sign-up required to start editing diagrams
Affordable pricing: Starter at $6.99/month, Pro at $11.99/month
Diagrams render in your browser; nothing stored unless you choose to save
Fast editor with instant rendering and clear error messages
Multi-platform export to web, iOS, and Android from one design
Optional AI integration without dependency or additional cost
Mermaid Viewer
MODO