PixiJS is a popular 2D graphics rendering library for the web, designed to create interactive and visually appealing applications. It uses WebGL for high-performance rendering, allowing developers to create rich graphics and animations that run smoothly in web browsers. With a simple API, PixiJS makes it easy for both beginners and experienced developers to build games, animations, and other visual content. It supports various features like sprites, textures, and filters, enabling the creation of complex scenes with minimal effort.