Download Hydrogen Executor
Grab the latest version of Hydrogen for your device below. It is free, it is the official build, and it takes less than a minute to get started. Just pick your platform and tap the download button. Once it is installed, grab your free key from the Get Key page.
Android
The Android build is the most popular one, and for good reason: it runs smoothly on just about any phone or tablet that can handle Roblox. Download the APK, tap it to install, and allow installs from unknown sources if your phone asks. Most people are up and running in under two minutes.
iOS
Yes, Hydrogen works on iPhones and iPads too. The iOS version installs through a simple guided process, and once it is on your device it works just like the Android build: same interface, same script library, same key system. If your iPhone runs Roblox, it will run Hydrogen.
Windows
Prefer playing on a PC? The Windows build gives you the full experience with a bigger screen and a proper keyboard for editing scripts. Run the installer, follow the one-minute wizard, and you are done. It sits quietly in the background until you need it.
Mac
Mac users are covered as well. The macOS build installs like any normal Mac app: drag it into Applications and open it. Everything works the same as on other platforms, so you can follow the same guides on this site no matter which device you are on.
A quick safety note: only download Hydrogen from this official site (hydrogenexecutor.org). Builds posted on random websites, Discord servers, or social media are often tampered with. If it did not come from here, do not install it. Questions about installing? The FAQ page has answers.