What is ImageJ.js?

ImageJ is a well-known Java-based software for image analysis, widely used in the scientific community. ImageJ.js brings the full power of ImageJ to the web, enabling professional image analysis on any device with a modern browser.

Powered by CheerpJ 3

ImageJ.js was enhanced and updated with CheerpJ 3 — a WebAssembly compiler that runs Java applications directly in the browser without any preprocessing. This unlocked capabilities that were impossible in previous versions, such as lifting the image file size limit and enabling proper file system access.

Adoption

Originally created during a hackathon in Dresden and evolved through the ImJoy project, ImageJ.js now serves 1,000–1,500 unique users daily for scientific image analysis, education, and research.

Learn more about this project here.