AllDup review
A fully free Windows duplicate finder with broad matching and cleanup controls.
Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026
AllDup is a free Windows utility for locating and managing duplicate files across local drives, storage media, network paths, and supported archive files. It suits Windows users who want broad control without a paid plan, including private users and companies. Installable and portable editions give users two deployment options, while folder filters can exclude locations from searches. Results can be managed by deleting, moving, copying, renaming, backing up, or sending selected files to the Windows Recycle Bin.
The free model is the central advantage. AllDup covers identical and similar content, image and sound similarity, filenames, sizes, modification or creation dates, file attributes, hard links, and video or sound duration. That range supports both straightforward duplicate cleanup and more specialized searches, such as finding similar images or music files. Preview support for image, text, audio, and video files helps users inspect results before taking action, and configurable selection criteria can automate repetitive choices. The product has been available since 1999, adding a long operating history to its feature set.
AllDup is focused on Windows rather than cross-platform use. Its listed integrations include VLC Media Player, Windows Media Player, Microsoft WordPad, and Windows Internet Explorer, so it fits environments centered on Windows files and applications. Users who need macOS or Linux coverage, or AI-assisted duplicate detection, should choose an alternative built for those requirements. For Windows users who value archive scanning, network-path support, media matching, previews, and Recycle Bin handling in a fully free utility, AllDup is a focused choice.
AllDup pros and cons
- Where it wins
- Matches files by content, names, metadata, media similarity, and duration
- Scans local storage, network paths, and ZIP, RAR, and 7Z archives
- Previews results and automates selection before sending files to Recycle Bin
- Where it doesn't
- Available only for Windows
- Does not include AI features
- Integrations focus on Windows media and document applications
AllDup fact sheet, pricing and score →
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