Standardizer is part of the Chemical Structure Representation Toolkit along with Structure Checker. These two applications have a shared installer, which can be downloaded from the corresponding product download page
On Windows
After the download is completed, run the Installer on your computer. An Installation Wizard opens that will guide you through the installation process. This will allow you to change the default installation folder and to add the application to your path. Optionally, you can run the installer of the Marvin Desktop Suite as well on your computer. Although for using only Standardizer, installing the Marvin Desktop Suite is not required, this package can support your work with the tool.
On Linux
Follow the manual of your linux distribution on the installation process for a .deb file on Debian based and an .rpm file for RedHat based distributions, respectively.
On macOS
Download and double-click on the .dmg file, which will open a pop-up window. This will allow you to drag-and drop the Chemical Structure Representtion Toolkit package into your Applications folder. Once this is done, no further steps are required.
GNU/Linux 64-bit
Since version 23.10 Java 17 is required. Please note that the installer is bundled with Eclipse Adoptium OpenJDK 17
For Java versions supported by earlier releases, please visit this site