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About AllDup
AllDup searches drives and network paths for duplicate files, comparing them by content, file name, file properties, hard links, similar pictures, similar music or audio and video duration. It can also look inside ZIP, RAR and 7Z archives and store file checksums in a database to speed up later scans.
An integrated file manager with preview lets you delete, move or back up the duplicates it finds. It runs on Windows 7 to 11 and Windows Server, as an installer or portable edition, and is free for private and business use.
Strengths
- Many comparison methods, including similar images and music
- Scans inside ZIP, RAR and 7Z archives
- Portable edition available
- Free for commercial use too
Limitations
- Windows only
- Closed source
- The number of search options takes time to learn
Details
- Pricing
- FreeFreeware, free for private users and companies.
- License
- Proprietary (Freeware)
- Developer
- Michael Thummerer Software Design
- Platforms
- Windows
- How it runs
- Downloadable app
- Account
- Not required
- Works offline
- Yes
- Best suited for
- Finding and cleaning up duplicate files on Windows drives and network shares
- Categories
- System utilities, Disk tools
- Last verified
- Added
- Provenance
- Facts checked against the developer's own pages and store listings, 1 sources on file.
Alternatives to AllDup
Compare allSoftware that can replace AllDup for an important use case, and what changes if you switch.
Duplicate Cleaner
A Windows app that finds and removes duplicate files, similar photos, music and videos.
Duplicate Cleaner also runs only on Windows and finds similar photos and music, but it is freemium, and video matching needs the paid Pro edition.
fclones
A command-line tool that finds groups of identical files and removes the copies you no longer need.
fclones is MIT-licensed open source for the Linux command line, finds duplicates by content, and offers a separate GUI front end if you want one.
rmlint
A fast command-line tool that finds duplicate files, empty directories and other filesystem clutter.
rmlint is an open-source Linux command-line tool that also finds empty files and folders, and writes a reviewable removal script instead of deleting directly.
fdupes
A command-line program that finds duplicate files in chosen directories and can delete them.
fdupes is an MIT-licensed terminal program for macOS and Linux that matches files by content, with interactive or automatic deletion but no graphical interface.
Gemini 2
A Mac duplicate finder that locates identical and similar files, photos and music for deletion.
Gemini 2 moves the job to macOS, scanning Photos and Music libraries for exact and similar duplicates, and full use requires a paid license.
Similar software
Related functionality, not necessarily a direct replacement.
WinDirStat
Draws your whole drive as a treemap, so a single 40 GB file is a huge rectangle you cannot miss.
WizTree
Finds what is eating a Windows disk in seconds by reading the NTFS master file table directly.
TreeSize Free
Shows which folders are eating a Windows drive, ranked largest first, without a scan that takes all afternoon.
FolderSizes
A Windows disk space analyzer that reports folder sizes and finds large, old and duplicate files.
BuhoCleaner
A Mac cleaner that removes junk files, finds duplicates and large files, and uninstalls apps.
SD Maid SE
An Android cleaning app that removes leftover files, duplicates and app junk to free storage.
