Chart.js is a popular open-source JavaScript library that allows developers to create interactive and visually appealing charts and graphs. It supports various chart types, including line, bar, radar, and pie charts, making it versatile for different data visualization needs. The library is easy to use and integrates well with web applications, enabling users to display data in a clear and engaging manner. One of the key features of Chart.js is its responsive design, which ensures that charts automatically adjust to different screen sizes. Additionally, it offers customization options, allowing developers to modify colors, labels, and tooltips to fit their specific requirements. This makes Chart.js a valuable tool for anyone looking to present data effectively on the web.