AllDup is free Windows software for finding duplicate files and managing the results. Searches can compare file content, properties, names, similar images or sound, and video or sound files with similar durations. The program scans NTFS, FAT, FAT32, and exFAT storage through drive letters or network paths, and can also search ZIP, RAR, and 7Z archives. 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 installer or Portable Edition. The maker lists Windows 11, 10, 8, and 7, plus Windows Server 2008 R2 through 2025, in 32-bit and 64-bit versions. Its freeware plan is free and is listed for private users and companies. Hard links have a narrower scope: files must be on the same local NTFS partition, not on a network drive or a virtual folder pointing to external data.
Who it is for
AllDup suits Windows users who want to locate duplicates across drives, network paths, or supported archives and then choose how to handle them. The maker lists the freeware plan for both private users and companies.
What is good
- Searches by content, names, properties, and similarity.
- Scans ZIP, RAR, and 7Z archives.
- Can preview image, text, sound, and video files.
- Available as an installer or Portable Edition.
- Freeware plan is listed for private users and companies.
What to know first
- Windows software only.
- Hard links require files on the same local NTFS partition.
- Hard links cannot be created on network drives.
- Hard links do not work in virtual folders for external data.
Verdict
AllDup offers multiple duplicate-matching methods, broad storage scanning, and tools to manage results at no charge. Its hard-link option is limited to files on one local NTFS partition.
Get started with AllDup
- Open the AllDup download page.
- Choose the installation download or Portable Edition.
- Run AllDup on a supported Windows version.
- Select local drives, network paths, or supported archives to scan.
- Review matches, then choose an available file action or export the results.
Questions about AllDup
How much does AllDup cost?
The AllDup Freeware plan is free. It is free for private users and companies.
Which operating systems does AllDup support?
The maker lists Windows 11, 10, 8, and 7, plus Windows Server 2008 R2 through 2025, in 32-bit and 64-bit versions.
Can AllDup scan network locations and archives?
Yes. It scans network paths and shares, and supports ZIP, RAR, and 7Z archives.
Can I use AllDup without installing it?
Yes. AllDup is available as a Portable Edition as well as an installable version.
Who makes AllDup?
The maker identifies itself as MTSD and says it was founded in 1999.
What is the limit on hard links?
Hard links require the files to be on the same local NTFS partition. They cannot be created on network drives or in virtual folders referring to external data.
AllDup plans and pricing
All plansCompared on duplicate file finders
- Free plan
- Yes
- Platform coverage
- windows
- Scan locations
- local drives and storage media; network paths and shares; archive files including ZIP, RAR, and 7Z
- Match methods
- file content; image similarity; sound similarity; filename; file size; modification or creation date; file attributes; hard links; video or sound duration
- File preview
- Yes
- Automatic selection
- Yes
- Recycle Bin / Trash
- Yes
- Folder exclusions
- Yes
