Mermaid.js is a JavaScript-based tool that lets you create diagrams and visualizations by writing simple, human-readable text. Instead of dragging shapes or drawing freehand, you describe your diagram's structure in plain text, and Mermaid.js automatically turns it into a polished, interactive graphic. This approach makes it easy to keep diagrams up to date, version them with your code, and collaborate with others. Text-based diagramming is especially helpful for developers, technical writers, and teams who want to generate diagrams as part of documentation, code comments, or project planning. The key benefits include:

• Quick updates;
• Easy sharing;
• Seamless integration into code repositories or markdown files.

Mermaid.js supports several popular diagram types, each serving a different purpose:

• Flowcharts: show the steps in a process or workflow, using boxes and arrows to represent actions and decisions;
• Sequence diagrams: visualize how messages or events move between participants over time, great for illustrating interactions in software systems;
• Mind maps: organize ideas, concepts, or information hierarchically, making it easy to brainstorm and structure topics;
• Gantt charts: plan and track project tasks over time, displaying schedules, dependencies, and progress;
• ER diagrams: depict entities and their relationships, commonly used for designing and understanding databases.