This script is a script that locates and deletes unloaded and unused chunks inside of region files. This saves significants amounts of space. (In my own testing, it went down by five or seven folds.)

Put all of your .mca region files into the input folder and then run the script. Once it finished, you can replace your old region files with the one inside of the output folder.

• --nokeep Delete the files as they are done being treated (Default: False)
• --input "directory" Select your input folder (Default: ./input/)
• --output "directory" Select your output folder (Default: ./output/)
• --optimisechunks Will also attempt to optimise individual chunks by deleting cached data, at the cost of performance upon reloading the chunks. The storage gain is MINOR only use this if you absolutely need it. (Default: False)
• --replace Replaces the files in your input directory with the optimised ones. Overrides --nokeep and --output

This script is licensed under the GPL license. See the LICENSE file for more information.