This repository is no longer maintained. See https://invent.kde.org/kde/kdiff3 for the newest code and https://download.kde.org/stable/kdiff3/ for release boundles. All bugs should be filed at bugs.kde.org.
KDiff3 is a graphical text difference analyzer for up to 3 input files, provides character-by-character analysis and a text merge tool with integrated editor. It can also compare and merge directories. Platform-independant.