Find duplicate files and photos on Mac
Find identical files and look-alike photos, and clear the extras safely.
Three steps. That's it.
- 1
Drop your files
Drag files onto Duplicate Finder, choose them with Choose Files, or right-click them in Finder.
- 2
Choose the options
Set what you need in the options panel, such as also find similar-looking photos. Your choices are remembered for next time.
- 3
Get the result
The result lands in a new dated folder in Downloads › OneMacTools. Your originals are never changed.
What Duplicate Finder does
Finds exact duplicates by comparing file contents, and optionally photos that look the same even when resized or re-saved. See how much space you'd free, and move extra copies to the Trash (look-alikes are only ever reported).
Options
Great for
- Free up space on a full disk
- Clean up a photo library
- Find copies of the same document
Questions about Duplicate Finder
Does Duplicate Finder upload my files?
No. Duplicate Finder runs entirely on your Mac, so your files never leave it and it works offline.
Will Duplicate Finder change my original files?
No. Results are saved as new files in a dated folder in Downloads › OneMacTools, and your originals are left exactly as they were unless you turn on an option that says otherwise.
What does Duplicate Finder need?
Just a Mac with macOS 26 or later. There's nothing else to install.
Related Files tools
Rename many files at once with numbering, find and replace, prefixes or case changes.
Tidy a FolderSort a messy folder like Downloads into Images, Documents, Videos… or by month.
Large Files FinderSee which files are eating your disk space, biggest first.
Create ZIPBundle files and folders into a ZIP that opens anywhere.
Extract ArchiveOpen ZIP, TAR, GZ, 7Z, RAR and more without extra apps.
Encrypt FilesLock files and folders in a password-protected disk image (AES-256) that opens on any Mac.
Duplicate Finder, plus 88 more.
One app. One price.
All 89 tools for $29, once. 14-day money-back guarantee.