

Apps similar to Guiffy SureMerge include WinMerge, which is free and open source. Other options are Meld, Beyond Compare, KDiff3 and P4Merge. You're spoiled for choice with Diff Tools like Guiffy SureMerge: we list more than 50 alternatives for Windows, Mac, Linux, the web and self-hosting.


Pretty Diff is a language aware code comparison tool, beautifier, minifier, and parser for a variety of web oriented languages.

Diffchecker will compare text to find the difference between two text files. Just paste your files and click Find Difference!.

Diff Checker compares two snippets of text, source code, JSON or full files and highlights every change side-by-side. Everything runs locally inside the browser extension—no data ever leaves the user’s machine—so it suits security-sensitive workflows.




DiffALL compares any two media files and pinpoints every difference. Upload expected and actual — video, audio, images, subtitles (SRT/VTT), or text/JSON — and get a similarity score in seconds.



Free AI-powered text and file comparison tool. Compare PDF, Word, Excel, JSON, YAML, CSV, XML and Markdown online. End-to-end encryption, real-time collaboration, AI explanations. No installation needed.



Online Text compare is a browser based data compare tool that highlights the differences between two versions.
