Free live Mermaid diagram editor with no signup required
Local by default. Cloud sync when you want it.
Stage
Not given
MVP
Founded
Not given
Not given
Based in
Not given
FI
Pricing model
Free
Freemium
Pricing
Not given
Free desktop app for personal use with no account needed. Solo: €35 one-time payment includes 9 GB cloud storage, sync, backup, web app and commercial work licence. Pro: €5/month or €50/year includes 99 GB cloud storage, share links and collaborative editing. Team: €50/month or €500/year for shared
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
Image resize, rotate and layer ordering
Full keyboard shortcut support
Web access with cloud sync
Share boards and collaborative editing
Version history on Pro and Team
Export to PNG or JPEG image
Works fully offline on desktop
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
Free forever on your own disk for personal use with no account required
References stay local by default; cloud sync is optional
Fair one-time pricing for Solo instead of ongoing subscription
FlowViz
Moodis