Tool · Free
Dup Detector
Find duplicates. Fast.
100% local · cross-platform · open source
100% LocalCross-PlatformOpen SourceFree
01 — Overview
What it does
Dup Detector finds duplicate files on your machine and helps you reclaim disk space. Everything runs locally. Your files never leave your device.
02 — Features
Why it works
Four things, done well. No bloat.
Free Forever
No premium tier. No trial. No limits. Just free.
100% Local
All scanning happens on your device. Files never leave your machine.
Lightning Fast
Content-based hashing finds dupes in seconds, not hours.
Cross-Platform
Windows, macOS, Linux. One binary per platform.
03 — FAQ
Questions
Short answers only.
Is it really free? ▼
Yes. No paid tier, no upsells, no asterisk.
Does it upload my files? ▼
No. Dup Detector runs 100% locally. Your files never leave your device.
What platforms does it support? ▼
Windows, macOS, and Linux.
How does it find duplicates? ▼
Content-based hashing. Same content = same hash, even if filenames differ.
Reclaim your disk.
Free. Local. Three clicks.