Free live Mermaid diagram editor with no signup required
Design professional certificates with AI or drag-and-drop templates, generate in bulk, and download without watermarks
Stage
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Founded
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Pricing model
Free
Freemium
Pricing
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Free plan with watermark. Pro: $8.99 first month (regularly $9.99/month), $79 per year (regularly $149/year), or $149 for 27 months (2 years plus 3 months). One-time option: $12 per certificate.
Key features
Live preview as you type
21 diagram types including flowcharts, sequence, class, state, ER, Gantt, git graph, mindmap and timeline
Two-way editing for flowcharts
SVG and PNG export
Share diagrams as URLs with embedded diagram content
Built-in template picker and cheatsheet
No account or signup required
Works entirely in browser with local storage
Open Mermaid Live Editor links
Mermaid v11 syntax support
AI certificate generation
Drag-and-drop editor
Bulk CSV/Excel generation
PDF and PNG downloads
QR code integration
Custom branding
50+ professional templates
Save designs as templates
Manual data entry
What makes it different
No signup, paywall, or data collection required
Diagrams stay in your browser's local storage by default
Two-way editing that updates code when you edit the canvas
Live preview with no render button required
Clean SVG export for professional use in docs and slides
AI-powered certificate design in seconds with no design skills needed
Bulk generation of hundreds of certificates from CSV files
Free plan with no credit card required to start
Enterprise-grade security and data privacy
Watermark-free downloads and HQ export on Pro plan
FlowViz
CertificatesMaker