Anti-Twin vs Duplicate Cleaner

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 Cleaner finds duplicate files on Windows computers and network drives, including documents, photos, music, and video. Its Regular, Image, Audio, and Video modes identify matches using file content, attributes, or media-specific details. Image Mode can find exact or similar pictures, including rotated or flipped images, and can use image tags. Audio Mode compares similar-sounding or exact audio and audio tags; Video Mode can compare frames, thumbnails, soundtracks, data, and metadata tags. Scans can include local folders and drives, network paths, and portable devices such as smartphones and MP3 players. Pro can scan inside ZIP and other archive formats. After reviewing results, users can delete, move, copy, rename, or link selected files. Protections include folder exclusions, safeguards for system files and folders, and a check that all duplicates in a group are selected for removal. Duplicate Cleaner Free is for personal and home use, not commercial use. The Pro 5 download includes a seven-day trial. The current download supports Windows 11, 10, 8, or 7 and requires Microsoft .NET Framework 4.7.2 or greater.