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MermaidViewer

Mermaid Viewer - Online Diagram Editor with Live Preview

Pricing
Freemium
Free, Starter, Pro

About MermaidViewer

MermaidViewer provides an in-browser diagram editor that renders Mermaid diagrams in real time, allowing users to create and edit diagrams without local software. It targets developers and teams who need quick diagram visualization and easy sharing without setup.

MermaidViewer operates as a web-based tool where changes appear as you type, without a separate render step. The platform emphasizes immediate feedback, a live preview, and an AI-assisted coding option that can generate Mermaid code from text descriptions. It enables users to work in a browser, bypassing traditional desktop editors and installation requirements.

Its primary capabilities include live preview, AI-assisted coding, smart export, privacy-first data handling, real-time collaboration, and templates for common flows. The tool also supports enterprise deployment through Docker private deployment and role-based access control. Users can visually compose diagrams, export in multiple formats, and share editor links with teammates for co-editing.

MermaidViewer offers plans with different levels of access and limits, including a free tier and paid subscriptions. It highlights web-based access with no signup requirement for basic use, and mentions plans for individuals and professionals. It specifies that data stays in the browser and emphasizes plan options, pricing, and availability across platforms and integrations.

Key features

  • Live Preview
  • AI-Assisted Coding
  • Smart Export
  • Real-time Collaboration
  • Privacy First
  • Recommended Templates
  • Export options in docs

Pricing

Free
$0
  • 3 diagrams
  • 5 AI conversations per day
  • Low-res PNG export (with watermark)
  • Basic sharing
  • No version history
Starter
$69.99/year
  • 30 diagrams
  • 500 AI conversations per month
  • High-res PNG export (no watermark)
  • Unlimited sharing
  • 30 version history
  • Subscribe
Pro
$119.99/year
  • Unlimited diagrams
  • Unlimited AI conversations
  • All formats (PNG/JPG/PDF/SVG)
  • Advanced sharing & statistics
  • 100 version history
  • Priority support

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Frequently asked questions

What is Mermaid Viewer?
Mermaid Viewer is an online diagram editor with live preview for Mermaid diagrams, enabling creation and sharing in the browser.
Do I need to install anything?
No software installation is needed; you can open your browser and visit Mermaid Viewer to start.
What types of diagrams are supported?
Mermaid supports flowcharts, sequence diagrams, class diagrams, and more.
How do I export diagrams?
You can export diagrams as SVG, PNG, or PDF.
What is Mermaid?
Mermaid is a JavaScript-based diagramming tool that renders text definitions into diagrams.

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