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Processing.js

Create dynamic visuals, design interactive experiences, and learn quickly with comprehensive tutorials and resources.

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What is Processing.js?

Processing.js is a JavaScript library that brings the Processing programming language to web browsers. It allows you to write visual code that runs directly in HTML5 canvas, making it straightforward to create animations, interactive graphics, and data visualisations without needing to learn a new syntax if you're already familiar with Processing. The tool is particularly useful for artists, designers, and educators who want to add visual interactivity to websites or teach programming concepts through visual feedback. Processing.js includes extensive documentation and examples to help you get started quickly, whether you're building simple sketches or more complex interactive experiences.

Key features

Canvas-based graphics

Draw shapes, lines, and complex visuals using Processing syntax in the browser

Interactive input handling

Respond to mouse, keyboard, and touch events to create interactive experiences

Animation support

Build frame-based animations with built-in timing and motion functions

Data visualisation

Transform datasets into visual representations and charts

Code editor integration

Write and test sketches directly in the browser with immediate visual feedback

Cross-browser compatibility

Works across modern web browsers without additional plugins

Pros & cons

Advantages

  • Free to use with no licensing costs or restrictions
  • Low barrier to entry for people already familiar with Processing
  • Large community with many shared examples and tutorials available
  • Runs entirely in the browser, no installation or compilation needed
  • Good documentation covering basics through advanced techniques

Limitations

  • Performance can be limited compared to native graphics libraries for very complex visualisations
  • Requires knowledge of Processing syntax or willingness to learn it alongside JavaScript

Use cases

Teaching programming and computational thinking through visual feedback

Creating interactive data visualisations for websites and dashboards

Building generative art and visual experiments

Developing browser-based creative tools and design applications

Adding animated backgrounds and interactive elements to websites

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Full access to Processing.js library, documentation, examples, and online editor

Get started with Processing.js

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Try Processing.js free
  • Free plan available
  • No credit card