Czkawka is a free file-finding tool for locating duplicates, empty folders, and other unnecessary files.
Alternatives to DuplicateDuster
DoubleKiller is Windows software for finding duplicate files in directories, complete drives or computers in Network Neighborhood.
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jdupes
jdupes is a free utility for locating and handling exact duplicate files on Linux, macOS, and Windows.
Free planOpen sourceLinuxmacOSWindows7.2Free plan - 5
Duplicate Files Fixer
Duplicate Files Fixer scans for duplicate photos, videos, music, documents, and other files, then lets you review and delete selected copies.
Free planAndroidmacOSWindows6.8From €35.95 a year - 6
Duplicate Photos Fixer Pro
Duplicate Photos Fixer Pro finds exact duplicate and similar-looking photos so you can review a library, remove unwanted copies, and recover storage.
AndroidiOSmacOSWindows6.7From $39.95 a year - 7

dupeGuru
dupeGuru is a desktop application for locating duplicate files on Windows, macOS, and Linux.
Free planLinuxmacOSWindows6.6Free plan - 8

Cisdem Duplicate Finder
Cisdem Duplicate Finder locates duplicate files and visually similar photos on macOS and Windows.
macOSWindows6.3From $19.99 a year - 9

Easy Duplicate Finder
macOSWindows6.3From $39.95 a year - 10

Duplicate File Detective
Windows6.2$30 one-time - 11
Anti-Twin
Anti-Twin is a free utility for locating duplicate and similar files.
Free planLinuxmacOSWindows6.0Free plan - 12

Duplicate Cleaner
Duplicate Cleaner finds duplicate files on Windows computers and network drives, including documents, photos, music and video.
Free planWindows6.0Free plan - 13
DupScout
Windows6.0$250 one-time - 14
EaseUS DupFiles Cleaner
EaseUS DupFiles Cleaner is a Windows utility for locating and reviewing duplicate files on selected folders and drives.
Free planWindows6.0From $59.95 a year - 15
fclones
fclones is a free, open-source command-line utility for finding identical files and handling unwanted copies.
Free planLinuxmacOSWindows6.0Free plan - 16
fdupes
fdupes is a free, open-source Linux utility that finds duplicate files in directories you specify and can delete selected copies.
Free planLinux6.0Free plan - 17
rdfind
rdfind is a free command-line tool that finds duplicate files by comparing their contents rather than relying on filenames.
Free planLinuxmacOSWindows6.0Free plan - 18

AllDup
AllDup is a Windows program for finding duplicate files and deciding what to do with them.
Free planWindows5.9Free plan - 19
CloneSpy
CloneSpy is a free Windows utility for finding and removing duplicate files to help reclaim hard drive space.
Free planWindows5.9Free plan - 20

Dup Detector
Dup Detector is a free, open-source desktop app for finding duplicate files and reclaiming drive space.
Free planLinuxmacOSWindows5.9Free plan - 21
rmlint
rmlint is a free, GPLv3-licensed utility for finding duplicate files and other filesystem waste, then offering candidates for removal.
Free planLinuxmacOSSelf-hosted5.9Free plan - 22
Tidy Up
macOS5.9$29.99 one-time - 23
Wise Duplicate Finder
Wise Duplicate Finder is a Windows utility for locating and deleting duplicate files in selected folders and disks.
Free planWindows5.9From $11.97 a year - 24
Ashisoft Duplicate File Finder
Ashisoft Duplicate File Finder is a Windows application for locating and cleaning up identical files.
Windows5.8From $39.95 a year - 25
dskDitto
dskDitto finds duplicate files across disks with parallel scanning and offers a terminal interface by default plus an optional, experimental graphical interface.
LinuxmacOS5.8 - 26
Gemini 2
macOS5.8 - 27
Duplicate Files Search & Link
Duplicate Files Search & Link is a free Windows utility that finds duplicate files through byte-by-byte content comparison, regardless of filename.
Free planWindows5.7Free plan - 28
Doppel
Doppel is associated with a repository now renamed File Foundry, whose release notes identify the published app as com.junowoz.filefoundry.
macOS5.6 - 29
DUDE (DUplicates DEtector)
DUDE (DUplicates DEtector) is a free desktop utility for finding duplicate files on Linux and Windows.
LinuxWindows5.5 - 30
dupeGuru
LinuxmacOSWindows4.7