DoubleKiller
DoubleKiller is Windows software for finding duplicate files in directories, complete drives or computers in Network Neighborhood.
What DoubleKiller is
DoubleKiller is Windows software for finding duplicate files in directories, complete drives or computers in Network Neighborhood. It can compare files using any combination of name, size, modification date and content, and scans can exclude files by name, type, attributes or size. A results list shows identical files for you to choose to delete or move to another directory; you can also export the list to a text file. DoubleKiller is a standalone executable that can be extracted and run without installation. Its maker says it does not alter the system without prior permission. The free version is for private use, allows unlimited folder and file counts, and limits each individual file to 2 GB; commercial use is not permitted. Pro adds a multilingual interface, advanced comparison options, saved and reloadable result lists and command-line automation. The download page lists version 1.6.2.82 dated 2007-07-07, and the maker says development is paused.
Good
- Scans directories, drives and network computers.
- Supports several file comparison criteria.
- Can exclude files by name, type, attributes or size.
- Runs without installation.
Watch out
- Free version is for private use only.
- Free version limits individual files to 2 GB.
- Development is paused.
- Recycle Bin or Trash handling is not supported.
Who it suits
DoubleKiller suits Windows users who want to locate duplicate files and choose whether to delete or move them. The free version is limited to private use and files up to 2 GB.
Verdict
DoubleKiller provides manual review and removal options, plus filters and multiple comparison criteria. Its paused development, dated listed release and free-version limits are important considerations.
Plans and prices
From DoubleKiller's own pricing page, checked 15 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| DoubleKiller Free | Free | Private use · unlimited folders and files · 2 GB maximum single-file size · no commercial use |
| DoubleKiller (free, private use) | Free | Free for private use · maximum single file size 2 GB · commercial use not permitted |
| DoubleKiller Pro Personal | $19.95, paid once | Private, nonprofit and educational use · unlimited folders/files · no stated time limit · one-time licence per workstation |
| DoubleKiller Pro Commercial | $39.95, paid once | Commercial use · one licence required for each computer · volume discounts available · one-time licence per workstation |
| DoubleKiller Pro (commercial use) | — | Unlimited folders and files · maximum single file size unlimited · commercial use |
| DoubleKiller Pro (private use) | — | Unlimited folders and files · maximum single file size unlimited · private use |
The facts
Each one read from DoubleKiller's own pages, with the date it was checked.
What it does
- Archive and catalog support
- Pro 2.1.0.104 added scanning inside ZIP archives and catalog files representing CDs, DVDs or folders.checked 15 Oct 2026
- Automatic selection
- Pro can automatically mark files such as the oldest or largest item in each duplicate group.checked 15 Oct 2026
- Command-line automation
- Pro documents command-line switches that automate folder selection, scanning and duplicate removal.checked 15 Oct 2026
- Comparison criteria
- Duplicate detection can combine file name, size, modification date and content comparisons.checked 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.checked 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.checked 15 Oct 2026
- Documentation
- Pro includes an optional help file described as a first-step guide, full reference and usage-example manual.checked 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.checked 15 Oct 2026
- Export
- The results list can be exported to a text file.checked 8 Oct 2026
- Filtering
- Users can include or exclude files using name masks, file types, attributes and size ranges.checked 15 Oct 2026
- Filters
- Scans can exclude files by name, file type, attributes, or size.checked 8 Oct 2026
- Language support
- Pro has a multilingual interface with downloadable German, Spanish, Czech, Italian, French and Brazilian Portuguese language files.checked 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.checked 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.checked 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.checked 15 Oct 2026
- Limit: missing exclusion and bulk-selection controls
- A SnapFiles reviewer reports no subfolder-exclusion option and says marking or unmarking thousands of files is tedious.checked 15 Oct 2026
- Limit: Pro demo restrictions
- Softpedia says the unregistered Pro demo disables file removal and result exporting and displays a nag screen.checked 15 Oct 2026
- Portability
- The free edition is a standalone executable that runs after extraction and does not install or change the system without permission.checked 15 Oct 2026
- Portable use
- DoubleKiller is a standalone executable that needs no installation; extract it and run it.checked 8 Oct 2026
- Praise: no installer
- SnapFiles reviewers praise the single-binary design, straightforward interface and useful detail shown for each duplicate.checked 15 Oct 2026
The company
- Company address
- The maker's imprint identifies Jan Schlüter, Big Bang enterprises, Waldweg 4, 25335 Elmshorn, Germany.checked 15 Oct 2026
- Company founding
- Big Bang enterprises says it was founded at the beginning of 2000 by Jan Schlüter.checked 15 Oct 2026
- Founded
- 2000checked 28 Sep 2026
Money
- Free version limit
- The free version has a maximum individual file size of 2 GB; the comparison chart lists unlimited folder and file counts.checked 8 Oct 2026
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