AllDup

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Score6.8

Rank#6 of 38

PriceFree

Free planYes

Runs onWindows

Summary

AllDup is a Windows program for finding duplicate files and deciding what to do with them. Searches can compare file content, properties, names, similar images or sound, and the duration of video or sound files. It scans NTFS, FAT, FAT32, and exFAT storage through drive letters or network paths, and can also search ZIP, RAR, and 7Z archives. After a search, its file manager can delete, move, or back up duplicates; other listed options include shortcuts, hard links, and secure deletion. Users can preview image, text, sound, and video files, then export results to a text file or Excel table. AllDup is available as an installable program or Portable Edition. The maker lists support for Windows 11, 10, 8, and 7, as well as Windows Server 2008 R2 through 2025, in 32-bit and 64-bit versions. The freeware plan is 0.00 USD per free for private users and companies. Hard links work only for files on the same local NTFS partition, not network drives or virtual folders pointing to external data.

Who it is for

AllDup suits Windows users who want to search local or network storage and archives for duplicate files, then review or manage matches. Its portable edition may suit users who prefer not to install the program.

What is good

Searches archives as well as storage drives and network paths.
Matches by content, names, properties, and media similarity.
Previews image, text, sound, and video files.
Exports results to text or Excel.
Free for private users and companies.

What to know first

Windows only.
Hard links require the same local NTFS partition.
Hard links do not work on network drives or external-data virtual folders.

Verdict

AllDup offers several ways to locate duplicates and tools to review, export, or manage the results. It is free for private users and companies, but its hard-link option has a narrow storage limitation.

AllDup plans and pricing

All plans

AllDup Freeware Free Free for private users and companies · Windows only alldup.de · 30 Sept 2026

Compared on duplicate file finders

Free plan: Yesalldup.de
Platform coverage: windowsalldup.de
Scan locations: local drives and storage media; network paths and shares; archive files including ZIP, RAR, and 7Zalldup.de
Match methods: file content; image similarity; sound similarity; filename; file size; modification or creation date; file attributes; hard links; video or sound durationalldup.de
File preview: Yesalldup.de
Automatic selection: Yesalldup.de
Recycle Bin / Trash: Yesalldup.de
Folder exclusions: Yesalldup.de

Facts

Purpose: AllDup searches for and removes duplicate files by content, file properties, similar images, and music tracks.alldup.de · 30 Sept 2026
Search methods: It can find identical or similar content, images, sound files, names, and video or sound files with similar duration.alldup.de · 30 Sept 2026
Storage scanning: It scans NTFS, FAT, FAT32, and exFAT storage through drive letters or network paths, and can scan ZIP, RAR, and 7Z archives.alldup.de · 30 Sept 2026
File handling: Its file manager can delete, move, or back up found duplicates; the product page also lists shortcuts, hard links, and secure deletion.alldup.de · 30 Sept 2026
Previews and exports: The program previews images, text, sound, and video files, and can export search results to a text file or Excel table.alldup.de · 30 Sept 2026
Portable edition: AllDup is available as an installable version or Portable Edition.alldup.de · 30 Sept 2026
Operating systems: The maker lists Windows 11, 10, 8, and 7 plus Windows Server 2008 R2 through 2025, in 32-bit and 64-bit versions.alldup.de · 30 Sept 2026
Download version: The download page lists version 4.5.72, dated 17.12.2025, with installation and portable downloads.alldup.de · 30 Sept 2026
Download security: The maker says its files are digitally signed and guaranteed free of adware, spyware, and viruses, and provides SHA1 checksums.alldup.de · 30 Sept 2026
Support: AllDup support materials include online documentation, a support forum, and a technical support request form.alldup.de · 30 Sept 2026
Languages: The download page lists 25 interface languages.alldup.de · 30 Sept 2026
Hard-link limits: Hard links require files on the same local NTFS partition; they cannot be created on network drives or in virtual folders referring to external data.alldup.de · 30 Sept 2026
Maker: The maker identifies itself as MTSD and says it was founded in 1999.alldup.de · 30 Sept 2026