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Mermaidviewer

Mermaidviewer

Mermaid Viewer is a browser-based editor for creating, previewing, and exporting Mermaid diagrams with live preview, AI-assisted code generation, collaboration, and enterprise deployment options.

Mermaidviewer is developer tools software teams evaluate for creative & design. Use this page to review pricing, integration signals, and the best alternatives before you commit.

Freemium Enterprise 70/100
#127 in Developer Tools (127 tools)
Added 4 months ago
17865 directory views this week

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Quick Overview

Best for: Creative & Design

What it does

Developer Tools software for decision-makers comparing workflow fit and alternatives.

Best fit

Creative & Design

Pricing snapshot

Freemium from $0

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Mermaidviewer

Mermaid Viewer is an online diagram editor that lets users write Mermaid syntax and see live previews instantly in the browser. It targets developers, architects, product designers, educators, and teams who need a fast, lightweight way to create flowcharts, timelines, wireframes, and other Mermaid-based diagrams without installing local tools.

The tool emphasizes speed and privacy: no signup is required to start, data stays in the browser by default, and users can export diagrams as SVG/PNG/PDF/Markdown. Mermaid Viewer also includes AI-assisted code generation (GPT‑4 powered), real-time collaboration links, template library, and enterprise options such as Docker private deployment and role-based access control.

Mermaid Viewer is a browser-based editor for creating, previewing, and exporting Mermaid diagrams with live preview, AI-assisted code generation, collaboration, and enterprise deployment options.

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Key Features

Live Preview

Instant rendering of Mermaid diagrams as you type—no separate 'Render' button required.

AI-Assisted Coding

A 'Generate with GPT-4' button converts text descriptions into Mermaid code to speed up diagram creation.

Smart Export

Export diagrams as SVG, PNG, JPG, PDF or Markdown with options for custom DPI and dark/light themes.

Enterprise Integration

Supports private deployment via Docker and role-based access control for team and enterprise use.

Smart Debugging

Syntax error highlighting with auto-correction suggestions to help fix broken diagrams quickly.

Real-time Collaboration

Share editor links for team members to co-edit diagrams in real time and collaborate on design.

Recommended Templates

Pre-built templates (flowcharts, timelines, wireframes, governance flows, course lifecycles) to accelerate diagram creation.

No Signup Required

Start creating diagrams immediately in the browser without registration; data stays local by default.

Pricing

Free Tier Available

Free plan with 3 diagrams, 5 AI conversations per day, low-res PNG export with watermark, basic sharing and no version history.

Free

$0
  • 3 diagrams
  • 5 AI conversations per day
  • Low-res PNG export (watermark)
  • Basic sharing

Starter

$69.99/year
  • 30 diagrams
  • 500 AI conversations per month
  • High-res PNG export (no watermark)
  • Unlimited sharing

Pro

$119.99/year
  • Unlimited diagrams
  • Unlimited AI conversations
  • All formats (PNG/JPG/PDF/SVG)
  • Advanced sharing & statistics

Use Cases

Architecture & System Diagrams

Rapidly sketch system and architecture diagrams to share designs and decisions with engineering teams.

Project & Academic Timelines

Create timelines for project milestones, semester schedules, and other chronological visualizations.

Process & Governance Flows

Document decision processes, governance committee workflows, and agenda intake/voting flows.

Wireframe Collaboration

Outline UI/UX flows from design brief to engineering handoff using flowchart and wireframe templates.

Teaching & Documentation

Embed or export diagrams for tutorials, docs, and presentations with high-quality export formats.

Integrations

Docker (Private Deployment)

Enables self-hosted/private deployment for enterprise environments.

Role-Based Access Control (RBAC)

Enterprise-level access controls to manage team permissions and security.

VS Code Plugin

A plugin (referenced in user feedback) integrates Mermaid Viewer functionality into VS Code for faster in-editor workflows.

Benefits

Real-time visual feedback while editing Mermaid code reduces iteration time.
AI-assisted generation speeds diagram creation from plain language descriptions.
No signup and local data handling prioritize ease of use and privacy.
Multiple export formats and DPI/theme options enable high-quality outputs for presentations and docs.
Collaboration links and sharing features support team workflows.
Enterprise deployment options (Docker + RBAC) enable private, controlled usage for organizations.

Limitations

Free plan limits: 3 diagrams, 5 AI conversations per day, low-res PNG with watermark, and no version history.
Some advanced features (high-res exports, unlimited diagrams, extensive version history, priority support) require a paid plan.

Frequently Asked Questions

How do I save my diagrams?
You can export diagrams as SVG, PNG, JPG, PDF, or Markdown. Exports offer options for DPI and dark/light themes depending on your plan.
How do I share diagrams with my team?
Share editor links to allow team members to co-edit diagrams in real time. Paid plans offer unlimited sharing and advanced sharing controls.
What types of diagrams are supported?
Mermaid Viewer supports any diagram expressible in Mermaid syntax—common templates include flowcharts, timelines, wireframes, governance flows, and course lifecycle charts.
Do I need to install anything?
No—Mermaid Viewer runs in your browser and requires no installation or signup to start. Enterprise customers can opt for Docker private deployment.
How do I export high-quality diagrams?
Use the paid plans (Starter or Pro) to export high-resolution PNGs without watermarks and select desired DPI; Pro also supports all export formats including PDF and SVG.

Getting Started

  1. 1 Enter Mermaid code in the built-in editor (or use a template).
  2. 2 Watch the real-time preview update as you type to iterate quickly.
  3. 3 Export the diagram as SVG/PNG/PDF/Markdown or share an editor link for collaboration.

Support

email

Contact support via [email protected] for general questions and account issues.

docs

Documentation, tutorials and MermaidDocs are available on the site under 'Docs & Tutorials'.

priority support

Pro plan includes priority support for faster response times.

API

Available: No

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