Alternatives to AllDup
Free Windows duplicate file finder that compares by content, properties, similar images or music. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
AllDup
Free Windows duplicate file finder that compares by content, properties, similar images or music.
Replacements
Listings that take over the same core job as AllDup.
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 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.
