Free online Mermaid diagram viewer and editor with live preview, AI generation, and exports
Production-ready website themes built with Astro for fast, multilingual, SEO-ready sites
Stage
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Pricing model
Freemium
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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
Essential: $99 for 12 months or $119 for lifetime access. Pro: $199 one-time. Business: $299 one-time. All Access Pass: from $99. Individual themes: $79 each (some discounted to $59).
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
Production-ready structure with organized pages, sections, and content files
No heavy front-end dependencies using Astro and Tailwind CSS
Built-in multilingual support with organized internationalization
GitHub repository access with release tags and commit history
Editable Figma templates for design collaboration
AI-assisted development ready with project guidance files
Responsive design with clean typography and spacing
Reusable sections and components for flexible layouts
Centralized customization through organized configuration files
Technical SEO and performance foundation with optimized markup
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
All Access Pass includes current and future themes for one price
14-day money-back guarantee on all purchases
Team collaboration with seats for multiple users per plan
Mermaid Viewer
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