Which distribution of ImageJ would you like to download?

Need help deciding? Click here.

Here are a few highlights of the two flavors of ImageJ. It’s not an exhaustive comparison, just a summary to give you an idea of their respective strengths.

ImageJ	ImageJ2
Lightweight (ImageJ is a single JAR file) Small download (81 MB) Simple software architecture is approachable for non-programmers Often faster than Fiji, for the scenarios ImageJ supports No copyright whatsoever Very stable and mature Responsive and experienced maintainer fixes bugs quickly Runs natively on M1 (arm64) Macs	More powerful Robust software architecture Advanced scripting features Licensed as permissive open source Backwards compatible with the original ImageJ ImageJ Updater lets you install plugins from ImageJ update sites Support for headless execution Works from Python, including from Jupyter Notebooks ImageJ2 scripts are usable from various software tools Integrated search bar

For a thorough discussion of the two projects and their differences, please read these papers:

Still have questions? Ask on the Image.sc Forum!

System requirements

ImageJ will run on any system that has a Java 8 (or later) runtime installed. This includes, but is not limited to:

Windows XP, Vista, 7 or 8 with Java installed from java.com
Mac OS X 10.8 “Mountain Lion” or later with Java installed from java.com
Ubuntu Linux 12.04 LTS or later with OpenJDK 8 installed

ImageJ as a web application

In lieu of downloading and installing a desktop application, you can run ImageJ in your web browser (on desktops or mobile devices).

You can try it here: https://ij.imjoy.io.

And see ImageJ.JS for details.

Troubleshooting

Many common questions are answered on the FAQ and Troubleshooting pages.
If you encounter bugs, please see the Getting Help page.

Source code

See the source code page for details on obtaining the ImageJ source code.

ImageJ Docs

Page contents

Downloads

System requirements

ImageJ as a web application

Troubleshooting

Source code

See also