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mermaid-js/mermaid

0
View on GitHub↗
88,676 stars·9,043 forks·TypeScript·MIT·77 viewsmermaid.ai/open-source↗

Mermaid

This project is a client-side rendering engine that transforms declarative, text-based syntax into visual diagrams directly within the browser. By utilizing a domain-specific language, it allows users to define complex structures—such as software architectures, process flows, and system behaviors—without the need for manual layout configuration. The library functions as a browser-based runtime that parses these definitions into intermediate abstract syntax trees, which are then processed by specialized engines to generate high-fidelity, resolution-independent graphics.

The system distinguishes itself through a modular architecture that decouples diagram types into independent plugins, allowing for a wide range of visualizations including sequence diagrams, entity relationship models, and project timelines. To ensure security when processing untrusted input, the library supports sandboxed rendering within isolated frames. It also features automatic rendering capabilities, which monitor the document object model to detect and visualize diagram definitions embedded within standard web content.

Beyond its core rendering engine, the project supports a documentation-as-code workflow by integrating with various development environments, productivity platforms, and content frameworks. This enables the inclusion of version-controlled, dynamic visuals in technical guides and wikis. The library is designed for flexible deployment, offering support for content delivery network integration to facilitate implementation without requiring local build processes.

Features

  • Declarative Visualization Languages - Converts plain-text configuration into visual charts and graphs without requiring manual layout adjustments.
  • Entity Relationship Models - Maps declarative definitions of entities and logical relationships into visual database schema representations.
  • Flowchart Generators - Calculates layout and connection paths automatically for process flows defined through simple text syntax.
  • Text-to-Diagram Engines - Translates declarative text definitions into fully rendered visual diagrams using standard web technologies.
  • Interactive Diagramming Libraries - Embeds interactive, browser-rendered diagrams directly into web applications and documentation platforms.
  • Text-to-Diagram Generators - Parses structured text syntax to render complex visual diagrams automatically within the browser.
  • Class Diagrams - Illustrates object-oriented system structures by mapping class definitions and relationships to standard diagramming conventions.
  • Sequence Diagrams - Visualizes interaction flows by transforming chronological text-based syntax into structured sequence diagrams.
  • Browser-Based Runtimes - Executes dynamic transformations of embedded code blocks into interactive visual elements within the browser.
  • C4 Architecture Diagrams - Depicts software architecture by defining system boundaries, containers, and components to represent complex technical structures.
  • Graph Layout Engines - Determines spatial positioning and edge routing for diagram nodes using algorithmic graph theory for readable output.
  • Gantt Charts - Visualizes project schedules and task dependencies by rendering text-based definitions into interactive timeline diagrams.
  • Pie Charts - Displays data distributions by defining labeled segments and numeric values to render proportional circular charts.
  • SVG Diagramming Libraries - Generates scalable vector graphics from text-based syntax to enable high-quality, responsive diagramming.
  • Diagramming Plugins - Supports modular extensions that allow custom diagram types and parsers to integrate with the core rendering engine.
  • Git Graph Visualizers - Renders version control history, including branches, commits, and merge patterns, from a simple text-based definition language.
  • State Diagrams - Models complex state machine logic by defining states, transitions, and choice points through a text-based syntax.
  • Automatic Diagram Renderers - Scans and renders diagram definitions embedded within document markup to visualize structured data instantly.
  • User Journey Maps - Maps user interaction flows by visualizing process steps, actors, and task statuses.
  • Architecture Visualization - JavaScript tool for rendering diagrams from Markdown syntax.
  • Diagramming And UI Libraries - Text-to-diagram generation and flowchart rendering.
  • Diagramming Tools - Tool for generating diagrams from text-based markdown definitions.
  • Online Design Tools - Renders text-based definitions into dynamic diagrams.
  • JavaScript 框架汇总 - Listed in the “JavaScript 项目” section of the Great Open Source Project awesome list.
  • Architecture Modeling - Constructs structural system diagrams from plain-text definitions to clarify complex architectural relationships.
  • Documentation Tooling - Facilitates the inclusion of version-controlled visual assets directly into technical documentation workflows and markdown-based content.
  • Documentation Visualization Tools - Clarifies complex technical workflows by embedding interactive, version-controlled diagrams into project wikis and documentation guides.
  • Content Sharing and Embedding - Injects dynamic visual content into web platforms by converting text-based source code into rendered diagrams via specialized plugins.
  • Editor Extensions - Enables live previews and syntax highlighting for diagram definitions within popular code editors through dedicated plugins.
  • Quadrant Charts - Organizes comparative data points into two-dimensional grid layouts to highlight strategic positioning and relationships.
  • DOM Observers - Observes document structure to identify and transform specific syntax blocks into diagrams automatically upon page load.
  • Wiki and Productivity Macros - Powers the automatic display of visual diagrams within wiki pages and productivity suites through simple macro integration.

Star history

Star history chart for mermaid-js/mermaidStar history chart for mermaid-js/mermaid

How this analysis was created: This summary and feature list are AI-generated from collected project material and can contain mistakes. Stars, license and language are imported from GitHub. Inclusion does not mean that we have tested or audited this project. Check the source documentation for any feature you depend on. Learn more on our About page.

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Frequently asked questions

What does mermaid-js/mermaid do?

This project is a client-side rendering engine that transforms declarative, text-based syntax into visual diagrams directly within the browser. By utilizing a domain-specific language, it allows users to define complex structures—such as software architectures, process flows, and system behaviors—without the need for manual layout configuration. The library functions as a browser-based runtime that parses these definitions into intermediate abstract syntax trees, which are…

What are the main features of mermaid-js/mermaid?

The main features of mermaid-js/mermaid are: Declarative Visualization Languages, Entity Relationship Models, Flowchart Generators, Text-to-Diagram Engines, Interactive Diagramming Libraries, Text-to-Diagram Generators, Class Diagrams, Sequence Diagrams.

Which projects share features with mermaid-js/mermaid?

Projects with overlapping indexed features include: terrastruct/d2 — This project is a diagram-as-code tool that transforms declarative text scripts into professional visual… plantuml/plantuml — PlantUML is a text-to-diagram generator that translates human-readable markup into structured graphical… chartdb/chartdb — ChartDB is a database schema visualizer and entity-relationship diagramming platform designed to help developers… mingrammer/diagrams — Diagrams is a diagram-as-code framework and infrastructure mapping tool used to generate system architecture… northwoodssoftware/gojs — GoJS is a JavaScript diagramming library and canvas-based visualization engine used to build interactive flowcharts,… yizhiyanhua-ai/fireworks-tech-graph — Fireworks Tech Graph is a tool that generates SVG and PNG technical diagrams from natural language descriptions,…

Projects sharing features with Mermaid

These projects share indexed features with Mermaid. Shared tags can include platform or build tooling; verify the primary use case before treating a result as a replacement.
  • terrastruct/d2terrastruct avatar

    terrastruct/d2

    23,083View on GitHub↗

    This project is a diagram-as-code tool that transforms declarative text scripts into professional visual representations. It functions as a technical documentation generator, allowing users to define nodes, connections, and hierarchical relationships through a domain-specific modeling language that integrates directly into version-controlled developer workflows. The tool distinguishes itself through a highly modular architecture that decouples diagram definitions from spatial positioning. It features a pluggable layout engine that supports multiple arrangement algorithms, alongside a styling

    Godeveloper-toolsdiagrammingdiagrams
    View on GitHub↗23,083
  • plantuml/plantumlplantuml avatar

    plantuml/plantuml

    13,093View on GitHub↗

    PlantUML is a text-to-diagram generator that translates human-readable markup into structured graphical representations. It functions as a diagram-as-code tool, allowing users to create and maintain technical documentation, architectural models, and flowcharts by decoupling diagram content from visual layout. The project distinguishes itself through a comprehensive rendering pipeline that processes domain-specific markup into various output formats, including vector and raster graphics. It utilizes a graph-based layout engine to calculate spatial positioning, while a declarative styling layer

    Javadiagramdiagram-as-codediagrams
    View on GitHub↗13,093
  • chartdb/chartdbchartdb avatar

    chartdb/chartdb

    21,286View on GitHub↗

    ChartDB is a database schema visualizer and entity-relationship diagramming platform designed to help developers understand, design, and document complex data architectures. It functions as a visual workspace where users can create and modify database schemas, define table attributes, and map foreign key relationships. By parsing database metadata or SQL scripts, the tool generates interactive diagrams that provide a clear overview of structural interdependencies and data associations. The platform distinguishes itself through its focus on automated documentation and schema synchronization. I

    TypeScriptdatabasedbdb-migration
    View on GitHub↗21,286
  • mingrammer/diagramsmingrammer avatar

    mingrammer/diagrams

    42,356View on GitHub↗

    Diagrams is a diagram-as-code framework and infrastructure mapping tool used to generate system architecture visualizations via Python code. It functions as a programmatic wrapper for Graphviz, allowing users to define cloud services and their interconnections to create structured architectural layouts. The project specializes in cloud architecture visualization by mapping software components to a library of provider-specific icons. This approach enables the management of system designs within version control to track architecture changes over time. The library provides capabilities for conf

    Pythonarchitecturediagramdiagram-as-code
    View on GitHub↗42,356
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