Unduped: Duplicate File Finder for Mac
Unduped app icon Unduped · For Mac

Find every duplicate. Keep the one you need.

Unduped finds the copies hiding across your Mac, your external drives and your old backups, so you can get gigabytes back without guessing which file is safe to delete.

Download on the Mac App Store See how it works

Requires macOS 15 or later · One purchase, no subscription.

Unduped results showing 41.66 GB in duplicate copies, broken down by videos, archives, images, audio and documents, with each group keeping one copy marked Kept and the rest selected for the Trash.
Every folder, every drive

One scan across everything you own.

Add your Pictures, Downloads, an external disk and a network share, and Unduped checks them all together. Files only count as duplicates when their contents match byte for byte, so a renamed copy is still caught and two different files with the same name never are.

  • Folders, whole drives, external disks and network shares
  • Exact matching by content, not by name or date
The Unduped start screen with Pictures, Movies, Documents, Downloads and a Backup 2TB drive added as locations, ready to scan for duplicates.
See before you delete

Know exactly what goes.

Results are grouped by file with a thumbnail, the size you get back, and every place a copy lives. Browse by photos, videos, music, documents or archives, open any copy in Quick Look, and hide what you don't care about.

  • Quick Look previews and Show in Finder for every copy
  • Filter out kinds of files or small files, or drop any group from the list
Unduped showing only duplicate images, 4.76 GB in total, with thumbnails for a Photoshop file, a RAW photo and an HEIC photo and the path of each copy.
Compare A → B

Clean up old backups without the worry.

Point Unduped at the files you keep and at an old backup drive. It finds everything on the backup that you already have, and only those copies can be removed. Your originals are never touched.

  • Files in A are locked and always kept
  • See how much space the backup drive gets back
Unduped comparing a Photo Library Export folder with an Old MacBook backup, finding 4.3 GB of copies on the backup while the files in A are locked and kept.
Safe by design

One copy always stays. Undo is one click away.

Auto-select keeps the oldest copy, the newest, the shortest path, or the ones in a folder you choose, and it never selects every copy of a file. Everything goes to the Trash, and Undo puts it all back where it was.

  • Files that changed after the scan are left alone
  • Moves to the Trash, never deletes behind your back
Unduped after cleaning up: 41.66 GB of duplicates moved to the Trash, with buttons to undo the move or start a new scan.
Built for big drives

Fast, careful and completely private.

Unduped handles folders with a million files, skips what belongs to your apps, and never sends anything anywhere.

Fast with huge folders
A million files are listed in seconds, and only files that could match are ever read.
Exclusions
Leave out any folder, or names like node_modules and .git wherever they appear.
Apps keep working
Your Library, your Music and TV libraries, and system folders are skipped automatically.
iCloud aware
Files that live only in iCloud are left alone, so a scan never downloads your whole Drive.
CSV export
Save the full list of duplicates to review in Numbers or Excel.
Private by design
Everything happens on your Mac. No account, no network connection, no tracking.
The Unduped Exclusions sheet, with macOS and app data skipped, three excluded folders, and folder names such as .git, node_modules and DerivedData turned on.
Unduped app icon

Get your disk space back.

Find every duplicate on your Mac and your drives, keep one of each, and undo anything you change your mind about.

Download on the Mac App Store

Questions or feedback? Contact support