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.




WinDiff is described as 'Graphical file-comparison program published by Microsoft (from 1992[1]), and is distributed with certain versions of Microsoft Visual Studio as well as in source-code form with the Platform SDK code samples' and is a Diff Tool in the development category. There are more than 25 alternatives to WinDiff for a variety of platforms, including Windows, Linux, Mac, Web-based and PortableApps.com apps. The best WinDiff alternative is WinMerge, which is both free and Open Source. Other great apps like WinDiff are Beyond Compare, Diffchecker, SemanticDiff and Compare.
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.




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.






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




SemanticDiff is a programming language aware diff for Visual Studio Code and GitHub. It helps software developers understand code changes faster by hiding irrelevant changes, detecting moved code, and highlighting refactorings.







Perform detailed folder and file comparisons on Mac with side-by-side expandable trees, colour and icon indicators, content-based matching, manual synchronisation, filename templates, quick reload, tabbed interface, drag-and-drop, and intuitive visual controls.




GNU Diffutils is a package of several programs related to finding differences between files.
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.


WinMerge JP is a fork of the original WinMerge, but after 2018 the two are nearly identical. WinMerge JP's features including 3-way compare has been merged into the original.


DiffGuru is a free online tool for developers and writers to instantly compare two blocks of text or files, highlight additions and deletions, and merge changes - no signup required, privacy-first design.




Easily compare and merge text files; compare doc, xls and pdf files; prepare comparison reports and printouts.

Intuitive interface many options for looking at the data such that it makes sense to the end user, easy to determine the next step for the user based on their initial objective. I love the drag and drop from either side to the other and the way it displays the status of the job in real time.