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DoubleKiller
What it is
DoubleKiller is Windows software for finding duplicate files in folders, full drives, or computers in Network Neighborhood. You can compare files by name, size, modification date, or content, and narrow scans by excluding files based on name, type, attributes, or size. The results list identifies matching files for you to choose whether to delete them or move them elsewhere; you can also export that list to a text file. DoubleKiller runs as a standalone executable, so you can extract and launch it without installing it. Its maker says the software does not change the system without your permission. The free version is for private use and limits individual files to 2 GB; commercial use requires a separate Pro license. Pro adds a multilingual interface, advanced comparison options, saved result lists, and command-line automation. The listed starting price is $19.95 one-time. The download page lists version 1.6.2.82, dated 2007-07-07, and the maker says development is paused.
For and against
For
- Scans folders, drives, and network computers.
- Excludes files by name, type, attributes, or size.
- Lets you review matches before deleting or moving.
- Runs without installation.
- Exports results to a text file.
Against
- Free version limits individual files to 2 GB.
- Free version is not for commercial use.
- Development is paused.
- No Recycle Bin or Trash handling.
The verdict
DoubleKiller provides file matching, filtering, and a review step before removal. Its paused development and the free version’s file-size and private-use limits are important considerations.
Who it suits
It suits Windows users who want to locate and review duplicate files before choosing what to remove or move. The free version is limited to private use and individual files up to 2 GB.
Plans and prices
DoubleKiller Free
Private use · unlimited folders and files · 2 GB maximum single-file size · no commercial use
Read 15 Oct 2026 · bigbangenterprises.de
DoubleKiller Pro Personal
Private, nonprofit and educational use · unlimited folders/files · no stated time limit
Read 15 Oct 2026 · bigbangenterprises.de
DoubleKiller Pro Commercial
Commercial use · one licence required for each computer · volume discounts available
Read 15 Oct 2026 · bigbangenterprises.de
DoubleKiller (free, private use)
Free for private use · maximum single file size 2 GB · commercial use not permitted
Read 8 Oct 2026 · bigbangenterprises.de
DoubleKiller Pro (commercial use)
Unlimited folders and files · maximum single file size unlimited · commercial use
Read 8 Oct 2026 · bigbangenterprises.de
DoubleKiller Pro (private use)
Unlimited folders and files · maximum single file size unlimited · private use
Read 8 Oct 2026 · bigbangenterprises.de
On the record
- Archive and catalog support
- Pro 2.1.0.104 added scanning inside ZIP archives and catalog files representing CDs, DVDs or folders.bigbangenterprises.de · read 15 Oct 2026
- Automatic selection
- Pro can automatically mark files such as the oldest or largest item in each duplicate group.bigbangenterprises.de · read 15 Oct 2026
- Command-line automation
- Pro documents command-line switches that automate folder selection, scanning and duplicate removal.bigbangenterprises.de · read 15 Oct 2026
- Company address
- The maker's imprint identifies Jan Schlüter, Big Bang enterprises, Waldweg 4, 25335 Elmshorn, Germany.bigbangenterprises.de · read 15 Oct 2026
- Company founding
- Big Bang enterprises says it was founded at the beginning of 2000 by Jan Schlüter.bigbangenterprises.de · read 15 Oct 2026
- Comparison criteria
- Duplicate detection can combine file name, size, modification date and content comparisons.bigbangenterprises.de · read 15 Oct 2026
- Deletion and moving
- The free edition deletes or moves selected duplicates, while Pro also supports the Windows Recycle Bin, shortcut replacement and empty-directory removal.bigbangenterprises.de · read 15 Oct 2026
- Development status
- A 2015 status notice says development was paused while Jan Schlüter pursued a PhD, although the maker said DoubleKiller still worked and emails were answered quickly.bigbangenterprises.de · read 15 Oct 2026
- Documentation
- Pro includes an optional help file described as a first-step guide, full reference and usage-example manual.bigbangenterprises.de · read 15 Oct 2026
- Download version
- The maker's download page lists DoubleKiller 1.6.2.82 dated 2007-07-07 with a 392 kB archive.bigbangenterprises.de · read 15 Oct 2026
- Export
- The results list can be exported to a text file.bigbangenterprises.de · read 8 Oct 2026
- Filtering
- Users can include or exclude files using name masks, file types, attributes and size ranges.bigbangenterprises.de · read 15 Oct 2026
- Filters
- Scans can exclude files by name, file type, attributes, or size.bigbangenterprises.de · read 8 Oct 2026
- Free version limit
- The free version has a maximum individual file size of 2 GB; the comparison chart lists unlimited folder and file counts.bigbangenterprises.de · read 8 Oct 2026
- Language support
- Pro has a multilingual interface with downloadable German, Spanish, Czech, Italian, French and Brazilian Portuguese language files.bigbangenterprises.de · read 15 Oct 2026
- Licence terms
- The maker calls the basic programs freeware but says users may not earn money with them or modify them; Pro is commercial software.bigbangenterprises.de · read 15 Oct 2026
- Limit: dated interface and maintenance
- Softpedia says the visual interface needs major improvement and notes that the program had not been updated for a long time.softpedia.com · read 15 Oct 2026
- Limit: deletion bypasses Recycle Bin
- MajorGeeks warns that the free edition deletes selected files directly instead of placing them in the Recycle Bin.majorgeeks.com · read 15 Oct 2026
