WinMerge is an open source differencing and merging tool for Windows. WinMerge can compare both folders and files, presenting differences in a visual text format that is easy to understand and handle.




The best alternative to KDiff3 is WinMerge, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to KDiff3 and many of them are so hopefully you can find a suitable replacement. Other interesting alternatives to KDiff3 are Meld, Beyond Compare, Kaleidoscope and Araxis Merge.
WinMerge is an open source differencing and merging tool for Windows. WinMerge can compare both folders and files, presenting differences in a visual text format that is easy to understand and handle.




Meld is an open-source, Python-based visual diff and merge tool that allows you to compare and edit files, supports syntax highlighting, and integrates with version control systems like CVS, Subversion, and Mercurial for dynamic diff updates. It works offline, is lightweight, portable, and ad-free.




Free, GTK-based, similar function.
File and folder comparison tool offering source control integration, 3-way merge support, and selective synchronization. Supports FTP, cloud, runs offline, uses simple commands for files, customization, and scripting for reporting. Lightweight, portable with CLI and built-in viewer.




Use Kaleidoscope to spot the differences in text and image files. Review changes in seconds with the worlds most advanced file comparison application.




Merge is the visual file comparison (diff), merging and folder synchronization application from Araxis. Use it to compare and merge source code, web pages, XML and other text files with native application performance.




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...


Diffchecker Pro enables you to compare various types of content, on your desktop or directly in the browser.




Intuitive, multi-platform application for two and three-way visual file and folder comparison.

ExamDiff Pro is a powerful, intuitive, and easy to use visual side-by-side comparison tool for comparing and merging text and binary files, and directories.




WinMerge 2011 series is a fork of the original WinMerge application that compiles without ATL/MFC dependencies to enable zero-budget developers to build WinMerge from sources using Visual C++ Express editions.


Free file and folder merge tool providing two-way comparison, Visual Studio and Atmel Studio integration, enhanced folder sync, syntax highlighting, batch operations, Intellisense, navigation by change type, command line support, and detailed control over merges.




Diffinity is a diff and merging tool with focus on accurate and easy to read source code diffs. It will compare the content of two files and present the differences in an easy to read line by line and char by char basis.




Meld isn’t as well-suited for syncing whole directory trees.