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Note: We encourage you to download and evaluate the latest release, the ".jar" file found here.
ET_Redux requires Oracle's Java 1.8. Java 1.9 and 1.10 are no longer supported and Java 1.11 through 1.17 involve major architectural changes that we have elected to avoid until 2024-2025. You can read here about the community's plans for Java.

UPDATE JAN 2021 Liberica OpenJDK 8 also works: be sure to download the "full jre" or "full jdk".


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ET_Redux is the flagship cyber infrastructure product of CIRDLES, the Cyber Infrastructure Research and Development Lab for the Earth Sciences, an undergraduate research lab at the College of Charleston in Charleston, South Carolina. ET_Redux was previously known as U-Pb_Redux, but in January of 2015, was renamed to reflect its expanding functionality and its sponsor, EARTHTIME (

ET_Redux currently serves the ID-TIMS and LAICP-MS U-Pb geochronology communities.

We have recently received NSF funding to extend the architecture to Uranium series analyses, as explained here.

As of March 2015, we are migrating our content from to this site, with the goal of stimulating community involvement.

This material is based upon work supported by the National Science Foundation under Grant Numbers 0930223 and 1443037. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.

Getting Started for Users:

You will always find the latest release here - it consists of one file that can be saved and executed from anywhere on your 64-bit machine - Unix, Linux, Mac, and Windows. Be sure you have the Java 1.8 Runtime Environment (JRE), found here. We are building help files for users here.

Getting Started for Developers:

Join Github by getting an account. Fork the repository and explore the code. We value your contributions, whether they are to the code, documentation, tests, help engine, issues, or planning. If you want more involvement, please contact Jim Bowring.