What is p5.js?

p5.js is a free JavaScript library that makes it easy to create visual art, animations, and interactive graphics directly in a web browser. It is designed for artists, designers, educators, and complete beginners who want to learn programming through creative expression rather than traditional software engineering exercises. The library is based on Processing, a long-standing creative coding environment. p5.js brings that same approachable philosophy to the web. You write simple functions, one to set up the drawing canvas and one that runs repeatedly to update what is drawn, and the library handles all the browser complexity behind the scenes. Drawing a circle that follows your mouse, for instance, takes just a few lines of code. Beyond simple shapes, p5.js supports audio-visual work, animation, interactivity, and generative art. It includes a full reference library of drawing tools, typography, image manipulation, and input handling. A community-built ecosystem of add-on libraries extends it further with capabilities like sound, 3D graphics, and hardware input. You would use p5.js when you want to make creative, visual, or educational projects in the browser without needing deep web development knowledge. It is especially popular in art schools, coding bootcamps, and workshops where the goal is creative exploration rather than building production software. A companion web-based editor lets you start coding immediately without installing anything. The library is written in JavaScript.