Create AI-designed QR codes that scan perfectly and match your brand.
Free online Mermaid diagram viewer and editor with live preview, AI generation, and exports
Stage
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Pricing model
Freemium
Freemium
Pricing
Not given
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
Dynamic QR codes with editable destination URLs
Scan analytics tracking scans, devices, locations, and timing
Never-expiring QR codes that work indefinitely
QR codes scan-tested on real iPhones and Android phones
Multiple download formats: PNG, SVG, and WebP
QR code generation in 25 to 30 seconds
Watermark-free downloads on all plans
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
QR codes that never expire and continue working after subscription cancellation
AI-generated artistic designs created in under 30 seconds
Built-in scan analytics without additional setup or tracking pixels
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
NG QRCode
Mermaid Viewer