Dup Detector
Find Duplicates. Fast.
Dup Detector is a powerful, privacy-first duplicate file finder that runs entirely on your local machine. No files are ever uploaded to any server. Built for developers and power users who need to reclaim disk space without compromising their privacy.
Features
100% Free
No premium tiers, no trials, no limits. Completely free forever.
100% Local
All scanning happens on your device. Your files never leave your machine.
Lightning Fast
Optimized algorithms find duplicates in seconds, not hours.
Cross-Platform
Works on Windows, macOS, and Linux.
Frequently Asked Questions
Is Dup Detector really free? ▼
Yes, completely free with no hidden costs or premium features locked behind a paywall.
Does it upload my files anywhere? ▼
No. Dup Detector runs 100% locally on your machine. Your files are never uploaded or transmitted anywhere.
What platforms does it support? ▼
Dup Detector works on Windows, macOS, and Linux.
How does it find duplicates? ▼
It uses content-based hashing to identify files with identical content, regardless of filename.