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A Simpler, Cheaper Mermaid Chart Alternative

Mermaid Chart is the commercial platform from the creators of Mermaid, aimed at teams that want collaborative, visual editing and integrations. MermaidViewer focuses on being the fastest way for individuals and small teams to write, generate, fix and share Mermaid diagrams — with a generous free tier and a low-cost Pro plan.

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At a glance

MermaidViewerMermaid Chart
Use without an accountYesAccount required for most features
AI diagram generationFree daily quota, more on ProAvailable on paid plans / limited credits
Code editor with live previewYesYes
Visual drag-and-drop editingNo — code-firstYes
Real-time multiplayer collaborationNo (share links & embeds)Yes
Export PNG / SVG / PDFYesYes
Price for individualsFree, Pro is low-costHigher per-seat pricing

Choose Mermaid Chart if…

you need real-time collaboration for larger teams, a visual editor for non-technical colleagues, or enterprise integrations. It's a strong product built by the Mermaid team.

Choose MermaidViewer if…

  • You prefer a fast, code-first editor that opens instantly with no login.
  • You want AI generate, edit, fix and explain without a big subscription.
  • You mostly share diagrams via links, embeds, Markdown and image exports.

Frequently asked questions

Is MermaidViewer affiliated with Mermaid Chart or the Mermaid project?

No. MermaidViewer is an independent tool built on the open-source Mermaid library.

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