Free live Mermaid diagram editor with no signup required
Create fast, fun, weird presentations and publish them as real web links
Stage
Not given
MVP
Founded
Not given
Not given
Based in
Not given
PT
Pricing model
Free
Freemium
Pricing
Not given
Free: create and publish anonymously, no account required. Pro: €9.99/month or €79/year (also available via Patreon Supporter membership during Early Access).
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
Create presentations without account or login required
Publish presentations as public web links
Embed presentations on your own website
Publish under custom @handle (Pro only)
Up to 15 slides per deck (Free) or 25 slides (Pro)
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
Anonymous publishing without login or credit card
Simple two-tier pricing with no hidden plans or upgrades
Ownership and control features distinguish Free from Pro
FlowViz