NextDiff

NextDiff is a free file comparison tool for Windows designed to check for differences between text files, source code, logs, configuration files, and folders. 

The program displays files side-by-side with clear visual highlighting of added, removed, and modified lines. It can also highlight edited text within a modified line, making it easier to identify exact changes. With folder comparison, difference navigation, editing support, merge actions, and flexible comparison options, NextDiff is a practical tool for developers, administrators, authors, and everyday Windows users who need a simple way to review file changes.