ROOT enables statistically sound scientific analyses and visualization of large amounts of data: today, more than 1 exabyte (1,000,000,000 gigabyte) are stored in ROOT files. The Higgs was found with ROOT!


As high-performance software, ROOT is written mainly in C++. You can use it on Linux, macOS, or Windows; it works out of the box. ROOT is open source: use it freely, modify it, contribute to it!

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ROOT comes with an incredible C++ interpreter, ideal for fast prototyping. Don’t like C++? ROOT integrates super-smoothly with Python thanks to its unique dynamic and powerful Python ⇄ C++ binding. Or what about using ROOT in a Jupyter notebook?

RNTuple: Where are we now and what's next? (26 Jan 2024)

Hello, this is Florine from the ROOT team! Over the past year, I’ve been working as a technical student funded by ATLAS to evaluate and help further develop RNTuple. As you may already be aware, RNTuple [1] is currently being developed as the successor to TTree, and is projected to be used in Run 4. I imagine you might be wondering why there is a need for a completely new (TTree-incompatible) system, and what this looks like. That’s why in this blog post, I will try to answer this question, as well as give you an overview of the current status of RNTuple, what we’re still working on before its first production release (and what we will work on beyond this), and finally how you can already try it out!

Interactive, web-based canvas is now the default in ROOT (05 Jun 2023)

After a long period of development and testing we decided to switch to the web-based TCanvas implementation by default in the ROOT master version. It has been present in the ROOT for a while (since 2017) and used already in the web-based TBrowser, which you have probably seen already.

New class TScatter (30 May 2023)
Coding in ROOT with the horsepower of an F1 (01 Mar 2022)

If you’ve ever rubbed your eyes trying to decrypt C++ compilation errors from a terminal, or even have faced with your bare eye the intimidating logs of valgrind output for memory leak detection, or manually deployed gdb, you should definitely keep reading. With this post, I believe you’ll improve your productivity and experience with ROOT by using QtCreator as a development and troubleshooting environment.

Debugging CERN ROOT scripts and ROOT-based programs in Eclipse IDE (30 Oct 2021)
Eclipse IDE dependencies
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