Python Duplicate File Finder: Find Identical Files Safely (Report First, Review Folder, Undo) - Windows, Mac, Linux

Details

Photos copied three times, downloads saved twice, backups of backups. This script finds every exact duplicate - whatever it's called - shows how much space you'd free, and lets you review before anything goes away.

What's inside

• dupfinder.py (single file, standard library only)
• Report-only mode with CSV report
• --move to a review folder, --undo, --min-size and --ext filters, multiple folders
• Self-test with 17 checks
• 5-page PDF guide

Good to know

• Python 3.8+ (free).
• Self-test passes on Linux with Python 3; uses only cross-platform standard library calls (Windows/macOS steps in the guide).
• Never deletes files. Back up important data before any clean-up.

Format & delivery

• One ZIP file containing:
• Duplicate-File-Finder-Guide.pdf
• dupfinder.py
• tests/run_tests.py
• README.txt
• Instant digital download after checkout. You also get the link by email.

Licence: personal use. Please don't resell or share the files.

Questions? [email protected]