DevToys

WinMerge

WinMerge is a free, open-source utility that lets you compare and merge both files and directories. It presents differences in a clear, visual format with syntax highlighting and line-by-line detail. The tool integrates with Windows Explorer, supports Unicode, and can be run as a portable application, making it ideal for developers, testers, and system administrators who need to spot changes quickly.

Meld

Meld is a free, open-source visual diff and merge tool that compares two or three files side by side, highlighting changed lines and letting users merge differences with a click. It also compares entire folders, flagging which files were added, removed, or modified, and can drill down into subfolders to review nested changes. Meld integrates with Git, Mercurial, Bazaar, and Subversion, and can be set as the diff and merge tool for 'git mergetool' or similar commands in other version-control systems. It runs on Linux natively, with official Windows installers and community-maintained macOS builds through Homebrew, MacPorts, or Fink.

How to Convert

How to Convert is a file conversion app that runs entirely on the user's own device instead of uploading files to a server, wrapping tools like FFmpeg, ImageMagick, and Pandoc behind a simple drag-and-drop interface. It supports thousands of image, video, audio, document, and email conversions, plus batch processing, PDF compression, and image-to-SVG vectorization.

Beyond Compare

Beyond Compare, made by Scooter Software, is a file and folder comparison utility used by developers and system administrators to spot differences between directory trees, merge conflicting file versions, and synchronize data across local disks, FTP/SFTP servers, and cloud storage. It goes beyond plain text diffing with dedicated viewers for tables, images, binary files, and Windows registry keys, plus a syntax-highlighting editor for comparing code. The software is sold as a perpetual, one-time license per major version rather than a subscription, with Standard and Pro editions available for Windows, macOS, and Linux. Pro adds three-way merge, FTPS/SFTP sync, and table comparison on top of the Standard edition's core file and folder diffing.