Icon of program: Duplicate Detective

Duplicate Detective for Mac

By FIPLABPaidUser Rating

Key Details of Duplicate Detective

  • Comprehensive duplicate file finder.
  • Last updated on February 29, 2024
  • There have been 3 updates
  • Virus scan status:

    Clean (it's extremely likely that this software program is clean)

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Editors' Review

Download.com staff

Duplicate Detective quickly finds and removes duplicate files from various locations on your computer, so you can reclaim the space they're taking up. Just add a folder to this program to see how many duplicates there are, and then remove the ones you choose to with just a few clicks.


Quick and efficient functioning: Everything this program does, it does quickly. The scans take very little time, and you can add folders in whatever way is most efficient for you, including drag-and-drop and direct browsing. You can also go through duplicates individually to see which you want to delete, or you can use the Auto Select feature to let the program do the work for you and further expedite the process. Even getting back files deleted by accident is convenient, as everything the program removes goes to the Trash, but not off your computer until you empty it.

Full previews: When you're viewing the results of a scan, you get more than just a list of filenames. In fact, you can view entire documents in the Preview screen without actually having to open them, so it's easy to see what you want to delete and what you want to keep.


No big bites: This program runs great on individual folders, but it runs into trouble if you give it too large of a task. Trying to identify and remove all of the duplicates on your machine at once will almost certainly lead the program to crash. But if you don't mind doing smaller chunks at a time, it's a great option.

Bottom Line

Duplicate Detective is a smooth and convenient program that greatly eases the process of removing duplicated files from your computer. Its interface clearly presents all of your options without extra noise, and its $2.99 price tag makes it a great value for what you get.

What's new in version 1.4

Thanks for all your feedback. We've implemented a fix for those that had issues with deleting thousands of duplicate files. Please do leave a new review and we'll keep the free updates coming :)

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Full Specifications

November 16, 2013
Latest update
February 29, 2024
Operating System
Mac OS X, OS X 10.9, Mac OS X 10.7, OS X 10.8
Additional Requirements
Total Downloads
Downloads Last Week

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Developer's Description

Comprehensive duplicate file finder.
Duplicate Detective is the most comprehensive duplicate finder for your Mac. It quickly scans your hard drive to find all the duplicate files and folders on your Mac. You can then selectively choose which duplicates to delete and free up precious space on your hard drive.CRISP & CLEAN INTERFACE:- Intuitive and easy to navigate- Retina-ready graphics- Scan individual or multiple folders in one go- Drag and drop support to add folders before scanningROBUST SEARCH ENGINE:- Files compared via our advanced SHA-1 hash checksum algorithm- Super fast and accurate duplicate detection algorithms- Locate duplicate images, audio, archives, entire folders and more- Support for iPhoto Albums- Support for external hard drives and network volumes- Blacklist certain folders to ensure they are never scannedFILTERING & REMOVAL:- Filter and sort duplicates depending on their type/size/name/age, etc- Quick Look support by hitting the spacebar over any duplicate file/folder- One-click auto selection/deselection of all duplicates for your ease- Double-check verification screen before deleting duplicates- Option to enable alias creation to replace duplicates with shortcuts- By default, duplicates are moved to your Trash, allowing for easy and safe recoveryWe've worked hard to make Duplicate Detective as simple and efficient as possible for you to use. We would love to hear your thoughts via email and make any improvements to future versions of this app. We intend to have an active development cycle powered by your feedback and support!