Especially when you analyze changes made to files you feel the need to compare. Ideally, the tool you use up your task easier. Than you need program that graphically displays the difference between two files, and allows the user to merge the changes individually. The most important is option to highlights the sections that differ in each file.
The tight integration between folder and file comparison makes it easy to identify and review every change in every source file, even when comparing source hierarchies containing thousands of files. In my work, also as a extensions translator , I use alternately with the two popular programs, both are for Windows.
WinMerge
This is an Open Source differencing and merging tool for Windows. This tool can compare both folders and files, presenting differences in a visual text format that is easy to understand and handle. DiffMerge supports folder hierarchy comparison and synchronization, enabling you to compare and merge entire directory trees. This is ideal for detecting changes in different versions of source code or web pages. DiffMerge enables you to compare and work with different revisions of text files, such as program source code, XML and HTML files. It supports ASCII, MBCS and Unicode.
A color-coded side-by-side comparison makes it easy to pinpoint at a glance similarities and differences between files. He shows detailed highlights of changes within lines. It can be configured to ignore differences in whitespace, comments, line endings and character case, as well as changes in lines matching specified regular expressions.
Visit the winmerge.org homepage.
DiffMerge
Application to visually compare and merge files within Windows, Mac OS X and Linux. Graphically shows the changes between 3 files. Allows automatic merging (when safe to do so) and full control over editing the resulting file. Performs a side-by-side comparison of 2 folders, showing which files are only present in one file or the other, as well as file pairs which are identical or different.
Visit and download DiffMerge
notepadd++
Interestingly, the popular editor as notepadd++ also has this functionality – Compare Plugin. To use, simply open the two files you wish to compare, click Plugins > Compare > Compare. The differences between the two files will then be highlighted.