Where is ImageJ2?
A standalone download of ImageJ2 is not yet available, due to how the core ImageJ update sites are currently structured. The ImageJ2 team is working hard to change this, but in the meantime, please use the Fiji distribution of ImageJ, which is built on ImageJ2 and bundles many additional useful plugins.
Which distribution of ImageJ would you like to download?
Fiji ImageJ 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.
ImageJImageJ2 Lightweight (ImageJ is a single JAR file)Small download (81 MB)Simple software architecture is approachable for non-programmersOften faster than Fiji, for the scenarios ImageJ supportsNo copyright whatsoeverVery stable and matureResponsive and experienced maintainer fixes bugs quicklyRuns natively on M1 (arm64) MacsMore powerfulRobust software architectureAdvanced scripting featuresLicensed as permissive open sourceBackwards compatible with the original ImageJImageJ Updater lets you install plugins from ImageJ update sitesSupport for headless executionWorks from Python, including from Jupyter NotebooksImageJ2 scripts are usable from various software toolsIntegrated search barFor a thorough discussion of the two projects and their differences, please read these papers:
doi:10.1186/s12859-017-1934-z doi:10.1002/mrd.22489 doi:10.1038/nmeth.2089Still have questions? Ask on the Image.sc Forum!
System requirementsImageJ 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 installedImageJ as a web applicationIn lieu of downloading and installing a desktop application, you can runImageJ 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 codeSee the source code page for details on obtaining the ImageJ source code.
See also ImageJ2 development releases for early versions of ImageJ2.