In previous article, I have mentioned Best Keycloak Alternatives (Open Source) but now in this article, I have mentioned Best WinMerge Alternative Diff Tool (Free and Open Source) with it's features.

1. Beyond Compare


Beyond Compare allows you to quickly and easily compare your files and folders.  By using simple, powerful commands you can focus on the differences you're interested in and ignore those you're not.  You can then merge the changes, synchronize your files, and generate reports for your records.


  • Compare Files, Folders
  • 3-way Merge 
  • Beyond Compare's intuitive Folder Sync interface lets you reconcile differences in your data automatically. 
  • Available for Windows/Mac/Linux
  • Free but you can buy pro version if you need 3-way merge

2. Meld


Meld is a visual diff and merge tool targeted at developers. Meld helps you compare files, directories, and version controlled projects. It provides two- and three-way comparison of both files and directories, and has support for many popular version control systems. 


  • Two- and three-way comparison of files and directories
  • File comparisons update as you type
  • Easily navigate between differences and conflicts
  • Use the built-in regex text filtering to ignore uninteresting differences
  • Meld supports many version control systems, including Git, Mercurial, Bazaar and SVN
  • Command line interface for easy integration with existing tools, including git mergetool
  • Available for Windows/Linux, you can use Meld from MacPorts
  • Free

3. Kdiff3


KDiff3 is a file and directory diff and merge tool which compares and merges two or three text input files or directories, shows the differences line by line.


  • Compares and merges two or three text input files or folders
  • Shows the differences line by line and character by character
  • Provides an automatic merge-facility.
  • It has an editor for comfortable solving of merge-conflicts.
  • It has options to highlight or hide changes in white-space or comments.
  • Free to use
  • Available for Windows/Linux.

4. Diffinity

Diffinity is a free diff and merging tool for Windows with focus on accurate and easy to read source code diffs. It will compare the contents of two text files and show all differences line by line and also which individual characters/words that differs.


  • Thumbnail view of all diffs
  • Folder comparison
  • Differentiates between changed, removed and added lines
  • Instance highlighting - double click or search for a word to show all instances of it
  • Customizable interface with support for tabs
  • In-line diffs live updated as you type
  • Free to use and download
  • Available only for Windows users

5. XXDiff


xxdiff is provided under the GNU GPL open source license and a graphical file and directories comparator and merge tool.


  • Comparing two files, three files, or two directories (shallow and recursive)
  • Files can be merged interactively and resulting output visualized and saved
  • Has features to assist in performing merge reviews/policing
  • Uses external diff program to compute differences: works with GNU diff, SGI diff and ClearCase's cleardiff, and any other diff whose output is similar to those
  • Fully customizable with a resource file
  • Free to use and open-source merge tool
  • Available for Windows/Linux

That's it for now, I have mentioned only free and open-source winmerge alternatives, if I have missed any tool please mention it in comments section.

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