Apps similar to Diffchecker include WinMerge, which is free and open source. Other options are Meld, Beyond Compare, KDiff3 and ForskScope. There's no shortage of Diff Tools like Diffchecker, with more than 50 alternatives for Windows, Mac, Linux, the web and self-hosting.
WinDiff is a 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.
Ediff is a comprehensive visual interface to Unix diff and patch utilities.
Ediff provides a convenient way for simultaneous browsing through the differences between a pair (or a triple) of files or buffers (which are called ‘variants’ for our purposes). The files being compare.
Utilities for web, compare text online with Syntax highlight and support for languages like Java, Javascript, Typescript, C#, HTML and CSS
CompareMerge is a Mac OSX's software tool for file comparison and merging text-like files.
Vietnam
"TableTextCompare" (TTC) is a small utility that provides easy comparison of two-tab-delimited or comma-delimited (csv) files, to determine the difference between the two files.
Israel
Compare text files or entire directory hierarchies, export and apply patches, and perform non-destructive find and replace operations on text files.
Germany
EU
Compare Files Using ' Diff Doc' a visual file compare and folder compare utility that creates a detailed file diff. File comparison can optionally be done with the command line. Compare Word and Compare XLS files in addition to PDF, txt, rtf, htm
ECMerge is a comparison and synchronization tool with two and three-way merge for text and folders and difference on binary, text, images and folders, locally, via FTP/S, SFTP or in version controls. For Windows, Mac OS X, Solaris and Linux.
FranceEU
Workshare Compare is the leading document comparison software that lets you perform file comparison of two documents against multiple modified versions.
United States
United Kingdom