SourceGear DiffMerge 

SourceGear DiffMerge is a powerful application that doesn’t only let you visually compare files and see differences between them, if any, but it also lets you join / merge these files according to the detected differences.

Briefly, this handy program can effectively perform 3 distinct tasks: it can compare two files and show you the differences, it can merge the contents of two files according to the differences between them, and it can compare two folders and show you the differences among their contained files. Regardless of what task you want to perform using SourceGear DiffMerge, the straightforward and intuitive interface will ensure that everything goes smoothly and easy. In other words, SourceGear DiffMerge is really easy to use, even for complete beginners.

SourceGear DiffMerge is especially useful when it comes to dealing with source code files, as besides clearly showing the differences between them and allowing you to join such files according to the detected differences, it also enables you to edit the resulting files to your liking. Furthermore, plenty of customization options are also available, including fully customizable rule sets capable of matching the requirements of comparing and editing the source code files for various languages, including Java, Python, XML, C++, etc.

To sum it all up, SourceGear DiffMerge is a really handy tool that works like a charm and makes file comparison and difference merging tasks really easy and accurate for anyone.