Find and remove duplicate images

Martin Brinkmann
Jan 30, 2007
Updated • Jun 4, 2013
Image, Windows

Have you ever tried to manually check a digital image collection for duplicates? When I look at the images stored on my computer, I'd imagine that it would take ages to go through it manually to find duplicates, and even if I would manage to do so, I'd end up finding only some dupes due to its size.

The best option in my opinion is to use programs that automate, or at least semi-automate the process for you so that you just have to go through the results a program presents to you instead of doing all the hard lifting manually.

I have mentioned Similar Images before here on the site, in an article that explained how you can find  duplicate files on your computer system. Since images are nothing more than files, I decided to give it a try to see how well it would cope combing through my image collection.

Similar Images scanned my collection of 75000 files in three hours and displayed all images it identified as dupes next to each other.The program displays both images next to each other as thumbnails, and also important information such as file size or resolution. You have options to delete one of the images or skip this set and move on to the next.

It is also possible to delete similar images automatically by defining rules in the options first. You can change a number of settings in the options. If you only want to compare files in the same folder or only in different folders for instance. It is also possible to lower the execution priority to lower the load and make the system more responsive.

Great tool, found lots of duplicates and I was reluctant to use the automatic routine to delete duplicates.

Update: The duplicate image finder is no longer available. As far as alternatives go, I suggest you check out the Anti Duplicate program which gets still updated regularly. The program works by selecting files or folders  that you want to check for duplicates.

What I like about the program most is that it displays previews of images right in its interface so that you can compare the images side by side before you delete one of them or skip the pair.

Other important parameters, like resolution and size, are also displayed here so that it is relatively easy to go through a collection of pictures on a system to find and delete all the duplicates from it.

Options in detail

  1. The program displays the image pair as thumbnails in the interface and links the size, resolution, format and path of each picture as well.
  2. The icons on the right are actions that you can perform, from top to bottom they are: Delete both images, replace second picture with the first, delete the first picture, go the previous or next result, delete the second picture, replace first picture with second image, mark as mistake and do nothing.
  3. The listing on the right displays all paired pictures so that you can go through them easily.
  4. You can alternatively mark selected groups of images and use the toolbar options at the top to handle them directly. This includes deleting the first image or second image, or marking them all as mistakes.


  • You can change the threshold difference from 5% to a different value. This increases or decreases how similar images need to be to be detected as potential dupes of each other.
  • You can filter image types that you do not want included in the search in the program options. Here you can also modify other important parameters such as a the minimal image width or height.
  • It is possible to save the list so that you can work on it at a later point in time.



Tutorials & Tips

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  1. Dan Donx said on January 15, 2023 at 10:29 am

    What mental age of reader are you targeting with the first sentence? 10?

    Why not write an article on how to *avoid* upgrading from W10 to W11. Analogous to those like me who avoided upgrading from 7 to 10 for as long as possible.

    If your paymaster Microsoft permits it, of course.

  2. Dexter said on January 15, 2023 at 11:14 am

    5. Rufus
    6. Ventoy

    PS. I hate reading these “SEO optimized” articles.

    1. cdr said on January 15, 2023 at 3:32 pm

      I used Rufus to create an installer for a 6th gen intel i5 that had MBR. It upgraded using Setup. No issues except for Win 11 always prompting me to replace my local account. Still using Win 10 Pro on all my other PCs to avoid the bullying.

  3. sv said on January 15, 2023 at 6:40 pm

    bit pointless to upgrade for the sake of upgrading as you never know when you’ll get locked out because ms might suddenly not provide updates to unsupported systems.

    ps…. time travelling?
    written. Jan 15, 2023
    Updated • Jan 13, 2023

    1. Martin Brinkmann said on January 16, 2023 at 5:49 am

      This happens when you schedule a post in WordPress and update it before setting the publication date.

  4. Anonymous said on January 16, 2023 at 8:24 am

    Anyone willing to downgrade to this awful OS must like inflicting themselves with harm.

  5. basingstoke said on January 16, 2023 at 11:18 am

    I have become convinced now that anybody who has no qualms with using Windows 11/10 must fit into one of the following brackets:

    1) Too young to remember a time before W10 and W11 (doesn’t know better)

    2) Wants to play the latest games on their PC above anything else (or deeply needs some software which already dropped W7 support)

    3) Doesn’t know too much about how computers work, worried that they’d be absolutely lost and in trouble without the “”latest security””

    4) Microsoft apologist that tries to justify that the latest “features” and “changes” are actually a good thing, that improve Windows

    5) Uses their computer to do a bare minimum of like 3 different things, browse web, check emails, etc, so really doesn’t fuss

    Obviously that doesn’t cover everyone, there’s also the category that:

    6) Actually liked W7 more than 10, and held out as long as possible before switching, begrudgingly uses 10 now

    Have I missed any group off this list?

    1. Heinz Strunk said on September 19, 2023 at 3:57 pm

      You have missed in this group just about any professional user that uses business software like CAD programs or ERP Programs which are 99% of all professional users from this list.

      Linux doesn’t help anyone who is not a linux kid and apple is just a fancy facebook machine.

  6. ilev said on August 24, 2023 at 7:34 pm

    Microsoft has removed KB5029351 update

    1. EP said on August 24, 2023 at 9:21 pm

      only from windows update though
      KB5029351 is still available from the ms update catalog site

  7. Anonymous said on August 24, 2023 at 11:05 pm

    1. This update is labaled as PREVIEW if it causes issues to unintelligent people, then they shouldn’t have allowed Preview updates ot install.

    2. I have installed it in a 11 years old computer, and no problems at all.

    3. Making a big drama over a bluescreen for an updated labeled as preview is ridiculous.

    This is probably another BS internet drama where people ran programs and scripts that modified the registry until they broke Windows, just for removing stuff that they weren’t even using just for the sake of it.
    Maybe people should stop playing geeks and actually either use Windows 10 or Windows 11, but don’t try to modify things just for the sake of it.

    Sometimes removing or stopping things (like defender is a perfect example) only need intelligence, not scripts or 3rd party programs that might mess with windows.

  8. john said on August 24, 2023 at 11:17 pm

    Windows 11 was a pointless release, it was just created because some of the Windows team wanted to boost sales with some sort of new and improved Windows 10. Instead, Microsoft cannot support one version well let alone two.

    1. John G. said on August 25, 2023 at 12:08 pm

      Windows 11 is the worst ugly shame by Microsoft ever. They should release with every new W11 version a complete free version of Starallback inside just to make this sh** OS functionally again.

  9. EP said on August 25, 2023 at 3:10 pm

    motherboard maker MSI has recently released a statement regarding the “unsupported processor” blue screen error for their boards using Intel 600/700 series chipsets & to avoid the KB5029351 Win11 update:–UNSUPPORTED-PROCESSOR–Error-Message-of-Windows-11-Update-KB5029351-Preview-142215

  10. EP said on August 29, 2023 at 7:32 pm

    check out the following recent articles:

    Neowin – Microsoft puts little blame on its Windows update after UNSUPPORTED PROCESSOR BSOD bug:

    BleepingComputer – Microsoft blames ‘unsupported processor’ blue screens on OEM vendors:

  11. Leonard Britvolli said on August 30, 2023 at 10:33 pm

    While there may be changes or updates to the Windows 10 Store for Business and Education in the future, it is premature to conclude that it will be discontinued based solely on rumors.

  12. sembrador said on September 5, 2023 at 9:32 pm

    My advice, I left win 15 years ago. Now I’m a happy linux user (linuxmint) but there is Centos, Fedora, Ubuntu depending on your needs.

  13. EP said on September 6, 2023 at 11:55 am

    motherboard maker MSI has recently released new BIOS/firmware updates for their Intel 600 & 700 series motherboards to fix the “UNSUPPORTED_PROCESSOR” problem (Sept. 6):–UNSUPPORTED-PROCESSOR–caused-BSOD-on-MSI-s-Intel-700-and-600-Series-Motherboards-142277

  14. Raphael Benzo said on September 24, 2023 at 9:52 pm

    I try to disable the Diagnostics Tracking Service (Connected Devices Platform User Services) but it wont let me disable it, any help will be greatly appreciated.
    Tank you for your help

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