Anti-Twin vs Duplicate Files Fixer

Anti-Twin searches hard disks and other storage locations for duplicate or similar files. It can compare names, check file contents byte by byte, search for binary similarity, and compare images by their pixels. The image method can find similar pictures even when they have different compression rates or file formats. Search locations include local drives, USB flash disks, memory cards, shared network folders, and a second folder or path. Results can be selected automatically, exported as an Excel file, and sent to the Recycle Bin or deleted.

The program is free for private use and dates to 2003. The download page lists 32-bit and 64-bit Windows, and says it can run through Wine on Linux or Mac and on ReactOS. It can also be installed and started from a USB memory stick. Anti-Twin does not search the Internet or FTP servers, excludes files larger than 2 GB from comparisons, and has no restore function for deleted files. The site says it was maintained until 2012 and still runs on Windows 10 and 11.

Duplicate Files Fixer scans computers, external drives, and cloud storage for duplicate photos, videos, music, documents, and other files. It can compare file contents as well as names, size, creation and modification dates, and similar names, so identical files can be detected even when their names differ. Users can preview grouped results and choose what to delete; Auto Mark selects extra copies while leaving one in each group unmarked. Folder exclusions are available. On Windows, it can scan Google Drive and Dropbox after sign-in and folder selection. The free version scans unlimited files and removes up to 15 duplicates in one go; additional deletions must be made one at a time. The paid version removes all marked duplicates in one click. It is listed for Android, macOS, and Windows. The paid plan is €35.95 a year, billed annually at a discounted price; the page also lists €64.95 as the product price. PC deletions go to the Recycle Bin by default, but USB and network-drive deletions do not.