Double File Scanner: find duplicate files

Martin Brinkmann
Nov 14, 2016
Updated • Nov 10, 2016

Double File Scanner is a free portable program for Microsoft Windows operating systems that scans selected directories for duplicate files.

While there are plenty of programs out there for Windows that find file dupes, Double File Scanner is without the shadow of a doubt a convenient one to use.

To name a few alternatives that we have reviewed in the past: Duplicate Commander, Noclone, Doublekiller and CloneSpy.

Programs may use various methods to find duplicate files: from simple file name comparisons to comparing hash values, file sizes and a mix of options.

Double File Scanner

double file scanner

Double File Scanner computes hashes of files to compare them against each other to detect duplicates. While that is without doubt one of the better methods of finding duplicates, it does not ship with other options such as fuzzy comparisons that detect nearly identical files as well (think two images that show the same scene but have different resolutions).

While that is a limitation, it may appeal to you if you have only that requirement and want to use a program that is streamlined for ease of use.

Basically, all you do is add one or multiple directories to a scan job. Once you have added at least one folder that you want scanned for dupes -- subdirectories are included by default in the scans -- you can sit back and wait for Double File Scanner to complete the scan job.

The scan time depends on several factors including the folder structure, the number of files, and the processor.

Results are sorted into groups for easy recognition. Each group lists all files that the program identified as duplicates.

duplicate files

The files are listed with their hash value, the name, location they are stored in, and the size.

You have two options to deal with duplicate files from here on out. First, you may right-click on individual duplicate files and select delete to remove them. You may also open the folder their are stored in and perform file operations using Windows Explorer instead.

The second option that you have is to use the program's automatic clean-up functionality. This deletes all but one file from each group which speeds up the process significantly once you have verified the findings.

There is little that you can do besides that. You may export the list of duplicate files and save the data as a XML or INI file, but that is about it.

Closing Words

Double File Scanner is an easy to use program that is powerful enough for most use cases. The main downside is that it does not support other find methods such as fuzzy logic. This means that you cannot use it to find nearly identical files which is mighty useful when it comes to images.

Now You: Do you scan your system for duplicate files occasionally or regularly?

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Double File Scanner
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  1. asd said on November 19, 2016 at 11:30 pm

    wow Double File Scanner was terrible.
    you can’t batch select files, you can’t go fullscreen, …

  2. Tom said on November 15, 2016 at 4:47 pm

    I have recently checked out this one and others. They all can find duplicates, but many lack good logic in selecting the ones to keep or remove. It gets tedious very quickly to select one file at a time. I wish authors would address this issue.

    I currently am using Anti-Twin, which was last updated way back in 2008. It has excellent r-click menu options within its results window for quickly selecting multiple duplicates for deletion.

  3. Clairvaux said on November 14, 2016 at 8:55 pm

    Wow… nice typewriter font, reminiscent of 1950’s computing technology. Even IBM Selectric typewriters had more elegant and readable fonts.

  4. Herman said on November 14, 2016 at 3:45 pm

    My computer desperately needs this. I’ve got backups of backups from earlier machines and upgrades with files and documents going back to the early 90’s.

    I’ve sat down in earnest to tackle this problem of well over one million plus files of every type on my current machine and the few freebie programs I’ve tried do indeed work but in this case, I’m looking for a solution that someone like a true brain dead Mac user would dream of – simple functioning! Not fifty thousand options and switches. Just something to show me all the duplicates and a second to eliminate with something like a select all duplicates function.

    Problem is with simplicity though. You may have some files in an archive and want them to stay there while others may be of more current use in another directory and you’d want to instead eliminate that copy in place of an archived copy. When you have as many files to deal with as I do, it becomes self defeating to fix the problem so you do nothing and the pile grows and grows.

    I’ve dealt with it more recently by taking old 350 or 500Gb hard drives, connecting them up and dumping old data there. Off the machine, on a shelf and available if needed.

  5. asd said on November 14, 2016 at 2:31 pm

    abandoned since 2014? not very encouraging… anyway I will give it a shot since I am all for open source alternatives.
    The best one I have used so far is Duplicate File Detective.

  6. Bart from Holland said on November 14, 2016 at 8:55 am

    i think this is better link, Martin:


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