What does Mermaid Online do?
Mermaid Online is a browser-based editor that transforms Mermaid syntax into diagrams with real-time preview. Users can start with templates, create flowcharts, sequence diagrams, class diagrams, and other Mermaid diagram types, and export results as PNG or SVG. The core syntax editor is free for personal and commercial use. Optional paid AI credits support generating and optimizing diagrams from text or images. It helps developers and documentation teams explain systems and workflows with diagrams they can maintain as text.
Who should use Mermaid Online?
and students, Developers, documentation teams, technical writers are the clearest fit based on how the product is positioned.
Best fit
Pricing: Free / paid plans
Platforms: Web
How much does Mermaid Online cost?
Free / paid plans Check the provider’s own page for the latest pricing, packages and terms.
Details, pricing and availability can change. We use provider information, verified owner updates and editorial review where available. Check the provider’s own page before making a purchase, booking or important decision.
Profile last updated 20 Oct 2026.
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