JDatPacker is a cross-platform utility for repackaging SimCity 4 plugin files into larger .dat files. It is an alternative to the original SC4DatPacker by wouanagaine.
This program requires Java 8 or later.
Simply unpack the zip archive and double click the jar file to start the application. An installation is not necessary.
Specify the source directory (usually outside your plugins folder) and target directory (usually inside your plugins folder). Each top-level folder contained in the source directory is bundled into a single .dat file which then is saved inside the target directory. Files larger than 500 MiB will be split.
The source files are hosted on GitHub.com.
This program is released under the MIT license (see included license file).