# MermaidEditor
# https://mermaideditor.lol

> MermaidEditor is an independent free online Mermaid.js editor for creating diagrams as code with instant browser preview. It supports flowcharts, sequence diagrams, Gantt charts, class diagrams, ER diagrams, mindmaps, timelines, and other Mermaid.js diagram types. Export diagrams to PNG and SVG with no account required.

## Core Tool
- [MermaidEditor](https://mermaideditor.lol/): The main editor. Paste or type Mermaid.js syntax; get an instant live preview.
- [Diagram Templates](https://mermaideditor.lol/templates): 30+ ready-to-use Mermaid diagram templates.
- [Syntax Cheat Sheet](https://mermaideditor.lol/cheat-sheet): Complete Mermaid.js syntax quick reference.
- [Full LLM Index](https://mermaideditor.lol/llms-full.txt): Plain-text coverage of active pages and tutorials.

## Active Tutorials and Guides
- [Mermaid Block Diagram Tutorial: Layouts, Arrows & Real Examples (2026)](https://mermaideditor.lol/blog/mermaid-block-diagram-tutorial): Learn the Mermaid.js block diagram syntax with copy-paste examples. Build system architecture, hardware layouts, and grid-based diagrams in plain text.
- [Mermaid.js Flowchart Styling: Colors, Classes & Custom Themes](https://mermaideditor.lol/blog/mermaid-flowchart-styling-guide): Master Mermaid.js flowchart styling with inline styles, CSS classes, custom themes, and color schemes. Complete guide with copy-paste examples.
- [How to Create CI/CD Pipeline Diagrams with Mermaid.js](https://mermaideditor.lol/blog/mermaid-cicd-pipeline-diagram): Learn how to visualize CI/CD pipelines using Mermaid.js. Step-by-step examples for GitHub Actions, GitLab CI, Jenkins, and deployment workflows.
- [Mermaid.js Quadrant Chart: Complete Guide with Examples](https://mermaideditor.lol/blog/mermaid-quadrant-chart-guide): Learn how to create quadrant charts in Mermaid.js for prioritization, risk analysis, and strategic planning. Includes syntax, examples, and best practices.
- [How to Create Timeline Diagrams with Mermaid.js](https://mermaideditor.lol/blog/mermaid-timeline-diagram): Learn how to create mermaid timeline diagrams with simple text syntax. Includes real-world examples for project roadmaps, historical events, and release schedules.
- [What is Mermaid.js? A Beginner's Introduction to Diagrams as Code](https://mermaideditor.lol/blog/what-is-mermaid-js): Learn what Mermaid.js is, how it works, and why developers love creating diagrams from simple text. A complete beginner's guide to diagrams as code.
- [How to Create a Flowchart with Mermaid.js — Complete Guide](https://mermaideditor.lol/blog/how-to-create-flowchart-mermaid): Step-by-step guide to creating flowcharts with Mermaid.js. Learn node shapes, edge types, styling, subgraphs, and best practices with copy-paste examples.
- [Mermaid Sequence Diagram Tutorial with Examples](https://mermaideditor.lol/blog/mermaid-sequence-diagram-tutorial): Learn how to create sequence diagrams with Mermaid.js. Covers participants, messages, loops, alt blocks, notes, and activation with real-world examples.
- [Mermaid Gantt Chart: Examples & Best Practices](https://mermaideditor.lol/blog/mermaid-gantt-chart-examples): Create Gantt charts with Mermaid.js for project planning. Learn task syntax, dependencies, milestones, sections, and date formatting with practical examples.
- [Mermaid Class Diagrams for UML — Developer Guide](https://mermaideditor.lol/blog/mermaid-class-diagram-uml): Create UML class diagrams with Mermaid.js. Learn classes, attributes, methods, relationships, inheritance, interfaces, and design patterns with examples.
- [Mermaid vs Draw.io vs Lucidchart: Honest Comparison (2026)](https://mermaideditor.lol/blog/mermaid-vs-drawio-vs-lucidchart): Mermaid vs Draw.io vs Lucidchart compared — pricing, features, collaboration, version control. Find the right diagramming tool in 2 minutes.
- [Add Mermaid Diagrams to GitHub README (2026 Guide)](https://mermaideditor.lol/blog/mermaid-in-github-readme): Add beautiful Mermaid diagrams to your GitHub README in minutes. Copy-paste examples, rendering tips, and fixes for common issues.
- [Mermaid State Diagrams — Complete Tutorial](https://mermaideditor.lol/blog/mermaid-state-diagram-guide): Create state machine diagrams with Mermaid.js. Learn states, transitions, guards, composite states, forks, joins, and real-world examples.
- [Entity Relationship Diagrams with Mermaid.js](https://mermaideditor.lol/blog/mermaid-er-diagram-database): Design database schemas with Mermaid.js ER diagrams. Learn entities, attributes, relationships, cardinality, and best practices for data modeling.
- [Creating Pie Charts with Mermaid.js](https://mermaideditor.lol/blog/mermaid-pie-chart-tutorial): Learn how to create pie charts with Mermaid.js. Simple syntax, customization options, real-world examples, and when to use pie charts in documentation.
- [Mermaid.js Cheat Sheet: Every Syntax You Need (2026)](https://mermaideditor.lol/blog/mermaid-syntax-cheat-sheet): Every Mermaid.js syntax in one place — flowcharts, sequence, Gantt, class, ER, mindmap & more. Copy-paste ready. Bookmark this page.
- [Mermaid.js Mindmap Tutorial: Syntax + Examples (2026)](https://mermaideditor.lol/blog/mermaid-mindmap-tutorial): Learn Mermaid.js mindmap syntax in 5 minutes. Node shapes, icons, hierarchy — with copy-paste examples you can render instantly.
- [How to Use Mermaid Diagrams in Obsidian](https://mermaideditor.lol/blog/mermaid-in-obsidian): Complete guide to creating and using Mermaid diagrams in Obsidian. Learn how to enable Mermaid, create diagrams, customize rendering, and publish compatibility.
- [Creating Mermaid Diagrams in Notion](https://mermaideditor.lol/blog/mermaid-in-notion): How to create and use Mermaid diagrams in Notion. Learn the code block method, understand limitations, and discover workarounds for the best diagramming experience.
- [Adding Mermaid Diagrams to Docusaurus Documentation](https://mermaideditor.lol/blog/mermaid-in-docusaurus): Complete guide to integrating Mermaid.js diagrams in Docusaurus. Learn plugin setup, MDX usage, theming, configuration, and practical examples for documentation sites.
- [Mermaid Git Graph Tutorial — Visualize Branch Strategies](https://mermaideditor.lol/blog/mermaid-git-graph-tutorial): Learn to create git graph diagrams with Mermaid.js. Visualize branching strategies, merge workflows, cherry-picks, and popular models like GitFlow and trunk-based development.
- [Creating User Journey Maps with Mermaid.js](https://mermaideditor.lol/blog/mermaid-user-journey-map): Learn how to create user journey maps with Mermaid.js. Understand the syntax, add sections and scoring, and apply journey mapping to UX research and product design.
- [Mermaid.js Themes & Dark Mode — Complete Customization Guide (2026)](https://mermaideditor.lol/blog/mermaid-themes-dark-mode): Learn how to apply built-in themes, enable dark mode, and customize Mermaid.js diagrams with themeVariables and CSS. Includes copy-paste examples for every theme.
- [Mermaid.js vs PlantUML — Which Diagrams-as-Code Tool Should You Use?](https://mermaideditor.lol/blog/mermaid-vs-plantuml): Compare Mermaid.js and PlantUML on syntax, diagram types, rendering, integration, and performance. Find out which diagrams-as-code tool is right for your team.
- [Mermaid Subgraphs: Group, Nest & Style Diagram Sections](https://mermaideditor.lol/blog/mermaid-subgraph-guide): Master Mermaid.js subgraphs to group related nodes, nest containers, set per-subgraph directions, and build cleaner architecture diagrams. Includes real-world examples.
- [How to Use Mermaid.js in VS Code: Extensions, Preview & Tips (2026)](https://mermaideditor.lol/blog/mermaid-in-vscode): Learn how to create, preview, and export Mermaid.js diagrams directly in VS Code. Complete guide to the best extensions, settings, and workflow tips for developers.
- [How to Use Mermaid.js Diagrams in GitLab: Complete Guide](https://mermaideditor.lol/blog/mermaid-in-gitlab): Integrate Mermaid.js diagrams into your GitLab Markdown files, wikis, issues, and merge requests. Learn native support, configuration, and best practices for developers.
- [How to Add Mermaid.js Diagrams to Confluence](https://mermaideditor.lol/blog/mermaid-js-in-confluence): Learn how to embed Mermaid.js diagrams in Confluence using macros and third-party apps. Step-by-step instructions and real-world examples for technical teams.
- [Mermaid Click Events: Build Interactive Diagrams (Complete Tutorial)](https://mermaideditor.lol/blog/mermaid-click-events-interactive-diagrams): Learn how to add click events to Mermaid.js diagrams. Link nodes to URLs, trigger JavaScript callbacks, build interactive flowcharts, and create clickable architecture diagrams with copy-paste examples.
- [Mermaid C4 Diagrams: Document Software Architecture as Code (2026 Guide)](https://mermaideditor.lol/blog/mermaid-c4-architecture-diagrams): Learn how to create C4 model architecture diagrams with Mermaid.js. Covers Context, Container, Component, and Dynamic diagrams with copy-paste examples for documenting software systems.
- [Mermaid Sankey Diagrams: Visualize Flows, Budgets & Energy Data](https://mermaideditor.lol/blog/mermaid-sankey-diagram-tutorial): Learn how to build Mermaid.js Sankey diagrams to visualize data flows, budgets, energy usage, and conversion funnels. Complete syntax guide with copy-paste examples.
- [Mermaid XY Charts: Build Bar & Line Graphs in Plain Text](https://mermaideditor.lol/blog/mermaid-xy-chart-tutorial): Learn how to build Mermaid.js XY charts — bar and line graphs in pure text. Complete syntax guide with axis configuration, multi-series examples, and styling tips.
- [How to Export Mermaid Diagrams to PNG, SVG, and PDF (2026 Guide)](https://mermaideditor.lol/blog/export-mermaid-diagrams-png-svg-pdf): A complete guide to exporting Mermaid.js diagrams as PNG, SVG, or PDF — using the live editor, CLI, browser, and code. Includes high‑resolution and transparent background tips.
- [Mermaid Requirement Diagram: Document Requirements as Code](https://mermaideditor.lol/blog/mermaid-requirement-diagram-guide): Learn how to create requirement diagrams in Mermaid.js to document system requirements, trace dependencies, and link specs directly in your codebase.
- [Best Mermaid Diagram Editors in 2026: Honest Comparison](https://mermaideditor.lol/blog/best-mermaid-diagram-editor-2026): Comparing the best mermaid diagram editors in 2026. Side-by-side feature comparison of online editors, VS Code extensions, and desktop tools.
- [Mermaid Live Editor Guide: How to Use, Tips & Tricks (2026)](https://mermaideditor.lol/blog/mermaid-live-editor-guide): Complete guide to using a mermaid live editor in 2026. Learn the interface, diagram types, export options, tips, and keyboard shortcuts.
- [Mermaid Editor: The Complete Beginner's Guide (2026)](https://mermaideditor.lol/blog/mermaid-editor-beginners-guide): New to Mermaid? This beginner's guide covers what a mermaid editor is, how diagrams work, first diagram tutorial, and all diagram types explained.
- [How to Create Mermaid Diagrams Online (No Install Required)](https://mermaideditor.lol/blog/mermaid-diagram-online): Create mermaid diagrams online without installing anything. Browser-based tools, all diagram types, export options, and embedding in your docs.
- [How to Document REST APIs with Mermaid Sequence Diagrams](https://mermaideditor.lol/blog/mermaid-api-flow-diagram): Learn how to use Mermaid sequence diagrams to document REST API flows, authentication, error handling, and microservice interactions — with copy-paste examples.
- [Mermaid.js Architecture Diagrams: Complete Guide for 2026](https://mermaideditor.lol/blog/mermaid-architecture-diagram-guide): Learn how to draw software architecture diagrams with Mermaid.js. Covers system architecture, microservices, cloud infrastructure, and database design with real examples.
- [How to Use Mermaid.js in MkDocs and MkDocs Material (2026 Guide)](https://mermaideditor.lol/blog/mermaid-in-mkdocs): Step-by-step guide to adding Mermaid diagrams to MkDocs and MkDocs Material sites. Covers plugin setup, dark mode, custom themes, and common fixes.
- [All Mermaid.js Diagram Types Explained (With Examples)](https://mermaideditor.lol/blog/mermaid-diagram-types): A complete guide to every Mermaid.js diagram type: flowchart, sequence, class, ER, Gantt, state, mindmap, timeline, pie, quadrant, git graph, and more — with live examples.
- [Mermaid.js Kubernetes Architecture Diagrams: Complete Guide with Examples](https://mermaideditor.lol/blog/mermaid-kubernetes-architecture-diagrams): Learn how to diagram Kubernetes clusters, deployments, and microservices architecture using Mermaid.js. Includes K8s namespace, ingress, service mesh, and pod topology examples.
- [How to Use Mermaid.js in React — Complete Integration Guide (2026)](https://mermaideditor.lol/blog/mermaid-js-in-react): Step-by-step guide to integrating Mermaid.js into a React app. Covers hooks, dynamic rendering, dark mode, SSR pitfalls, and a reusable MermaidDiagram component.
- [Mermaid.js Packet Diagram: Visualize Network Protocols with Text](https://mermaideditor.lol/blog/mermaid-packet-diagram-guide): Learn how to create network packet diagrams in Mermaid.js v11. Visualize TCP, HTTP, DNS, and custom protocol headers with simple text syntax — no Wireshark screenshots needed.
- [Mermaid for System Design Interviews: Diagram-as-Code in 2026](https://mermaideditor.lol/blog/mermaid-for-system-design-interviews): Ace your system design interview with Mermaid. Sketch scalable architectures, data flows, and sequence diagrams as code — fast, clean, and version-controlled.
- [The Complete Mermaid.js Tutorial: All Diagram Types with Examples (2026)](https://mermaideditor.lol/blog/mermaid-js-complete-tutorial): Master every Mermaid.js diagram type in one guide. Flowcharts, sequence diagrams, class diagrams, ER, Gantt, state, mindmaps, Git graphs, and more — with copy-paste examples and best practices.
- [Mermaid.js for Microservices Architecture Diagrams (2026 Guide)](https://mermaideditor.lol/blog/mermaid-microservices-diagram): Learn how to diagram microservices architectures with Mermaid.js. Covers service maps, API gateways, event flows, and deployment topologies with copy-paste examples.
- [How to Use Mermaid.js in Next.js (App Router & Pages Router)](https://mermaideditor.lol/blog/mermaid-js-nextjs-integration): Step-by-step guide to integrating Mermaid.js diagrams in Next.js. Covers dynamic imports, SSR pitfalls, custom hooks, and rendering flowcharts, sequence diagrams, and ER diagrams in your Next.js app.
- [How to Use Mermaid.js in Angular: Complete Integration Guide](https://mermaideditor.lol/blog/mermaid-js-in-angular): Step-by-step guide to integrating Mermaid.js diagrams in Angular applications. Learn how to render flowcharts, sequence diagrams, and more inside Angular components.
- [Mermaid.js Vue Integration: Add Diagrams to Your Vue 3 App](https://mermaideditor.lol/blog/mermaid-js-vue-integration): Step-by-step guide to integrating Mermaid.js with Vue 3. Learn how to render flowcharts, sequence diagrams, and more inside Vue components with live examples.
- [Mermaid Database Schema Diagram: Visualize Your DB with Code](https://mermaideditor.lol/blog/mermaid-database-schema-diagram): Learn how to create database schema diagrams using Mermaid.js ER diagram syntax. Covers tables, relationships, cardinality, and real-world examples for developers.
- [Mermaid Documentation Workflow: Diagrams as Code for Developer Docs](https://mermaideditor.lol/blog/mermaid-documentation-workflow): Build a practical Mermaid documentation workflow for README files, architecture decision records, pull requests, and developer portals with reusable diagram patterns.
- [Mermaid Kanban Board Guide: Build Project Boards with Code](https://mermaideditor.lol/blog/mermaid-kanban-board-guide): Learn how to create Mermaid Kanban boards for project planning, product roadmaps, bug triage, and documentation workflows using text-based diagrams.

## Author
Gagan Thakur — https://www.linkedin.com/in/gaganthakur