Diffing is the basis of such features as Microsoft Word’s Track Changes tool, but Word can only compare two plain text files or two Word documents. If you need to compare HTML, XML, or even ...

The often overlooked Xcode FileMerge app lets you spot what's changed between two files. Here's how to spot the differences using the tool.

With files, you may want to look at changes in source code, HTML code, or other data. VisualDiffer will spot these differences for you.

This post helps to compare two files in Notepad++. If some line is added, deleted, moved, or a line is changed, you can see the differences.