Download

JDownloader

Choose your operating system:

Link
Download Installer (x86, Java 1.8)
Download Alternative Installer (x86, Java 1.8)

Link
Download Installer

Link
Download for macOS Catalina, Big Sur, Monterey, Ventura, Sonoma, Sequoia
Download for macOS High Sierra, Mojave
Download for macOS Lion(10.7) or higher
Download for macOS Snow Leopard(10.6)

Link
Download MULTIOS JAR without dedicated Installer

JD Developer Server
You'll find more details in the wiki.

JDownloader requires Java Runtime Enviroment (jre/jdk) 1.5 or higher. If possible, you should use the latest Java version.

Operating System	Download
Windows 32 Bit	Download Java 1.6_14
Windows 64 Bit	Download Java 1.6_14
Linux 32 Bit	Download Java 1.6_14
Linux 64 Bit	Download Java 1.6_14
Mac OS X 10.4	Java for Mac OS X 10.4, Release 7
Mac OS X 10.5	Download Java for Mac OS X 10.5 Update 2