Anti-Twin

Windows · Mac · Linux

Freedom report

Three barsScore 6.5

Free tierA free tier is on its own pricing page
Runs widely3 of 6 device platforms
DocumentedPlans, terms and facts published

Anti-Twin is ranked #3 of 38 in duplicate file finders on Freedom251. It runs on Linux, macOS, Windows. There is a free plan.

Anti-Twin plans and pricing

All plans

Anti-Twin Classic Free Free for private use since 2003 · freeware antitwin.org · 8 Oct 2026

Compared on duplicate file finders

Free plan: Yes
Platform coverage: cross-platform
Scan locations: local hard disks, USB flash disks, memory cards, shared network folders, second folder/path
Match methods: file names, byte-by-byte file content, binary similarity, pixel-based image comparison
Automatic selection: Yes
Recycle Bin / Trash: Yes

Best Anti-Twin alternatives

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Two bars Czkawka Free tier No. 1Free6.6 Two bars dupeGuru Free tier No. 2Free6.6 Two bars Duplicate Files Fixer Free tier No. 4€3/mo6.5 Two bars fclones Free tier No. 5Free6.5 Two bars jdupes Free tier No. 6Free6.5 Two bars rdfind Free tier No. 7Free6.5

The record

Purpose: Anti-Twin searches a hard disk for duplicate or similar files and can send found files to the recycle bin or delete them.
File comparison: It can compare file content byte by byte and search for identical or similar file names.
Image comparison: Its pixel-based image comparison can find similar pictures, including images saved with different compression rates or file formats.
Similarity threshold: Binary content similarity can be searched with a minimum match as low as 60%, but the site says this takes much longer and is useful for only a few file types.
Folders and networks: It searches local drives, USB flash disks, memory cards, and shared network folders; it cannot search the Internet or FTP servers.
Manual review: The site advises checking files selected by mass-selection functions before deletion and manually inspecting similar-image results.
Deletion recovery: Anti-Twin has no restore function for deleted files; permanently deleted files cannot be restored through the program.
Export: Search results can be exported as an Excel file even if Excel is not installed, and the site says OpenOffice users can use the export.
File size limit: Files larger than 2 GB are not included in comparisons.
Supported operating systems: The download page lists Windows 32-bit and 64-bit and says it also runs via Wine on Linux or Mac, and on ReactOS.
Portable use: The program can be installed on a USB memory stick and started from there.
Maintenance status: The site says Anti-Twin first appeared in 2003 and was maintained until 2012; it states the program still runs on Windows 10 and 11.
Founded: 2003
Price from: Free

Where it ranks on Freedom251

Best Duplicate File Finders in 2026#3 of 38

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Sources

antitwin.org/en/· checked 8 Oct 2026
antitwin.org/en/similar.html· checked 8 Oct 2026
antitwin.org/en/folders.html· checked 8 Oct 2026
antitwin.org/en/selection.html· checked 8 Oct 2026
antitwin.org/en/download.html· checked 8 Oct 2026