This is a GUI for the precomp command line utility.
It allows you to precompress and recompress files. It supports standard, intense and brute precompression modes.
More details and instructions at my website: https://moisescardona.me/precomp-gui/
Precomp is made by Christian Schneider.
Precomp repository https://github.com/schnaader/precomp-cpp