Free online Mermaid diagram viewer and editor with live preview, AI generation, and exports
Stage
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Founded
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Pricing model
Free
Freemium
Pricing
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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
Key features
Generate favicons from images, text, or emoji
Convert between PNG, JPG, WebP, SVG, GIF and ICO formats
Check website favicon setup and scoring
Extract and download icons from any website
Instant canvas rendering as you design
Create complete favicon packages with manifest
Favicon API for developers
Batch generator for bulk favicon creation
PWA and app icon generator
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
What makes it different
Processes most files in your browser without uploading
No account or signup required
Complete favicon package in one ZIP file
Comprehensive guides for implementation
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
favicon.gg
Mermaid Viewer