A simple command line tool that allows you to easily work with .mca (Minecraft region) files
mcatool <SUBCOMMAND>
extract Extract a single chunk from a .mca file
trim Trim all inactive chunks from a world
help Print this message or the help of the given subcommand(s)
To trim (remove) all chunks which have been inhabited for less than 5 minutes
in the world folder:
mcatool trim world 6000