🔍 MirrorMatch - Duplicate File Finder

MirrorMatch is a cross-platform desktop utility (Python + Tkinter) to scan folders and find duplicate files.
It combines file size filtering, fast CRC32 checksums, and byte-level comparison to ensure accuracy.

Results are exported into a clean CSV report, and you can easily review or open them in Excel/LibreOffice.

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✨ Features

✅ Accurate duplicate detection
  Uses a 3-step process:

1. Group files by size (fast pre-check).
2. Within equal-sized groups, compute CRC32 checksum.
3. For checksum matches, verify with byte-for-byte comparison.

✅ Intuitive interface

• Browse folder easily.
• Progress bar with real-time ETA.
• Tooltips to guide users.

✅ Control the scan

• Pause / Resume whenever you want.
• Cancel the scan and reset progress instantly.

✅ CSV export

• CSV report with duplicate groups.
• Opens automatically after scan (on Windows, macOS, and Linux).

✅ Cross-platform
Works on Windows, macOS, and Linux with Python 3.x.

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🚀 Installation & Usage

1. Clone the repository:

2. Install dependencies:

(Only uses standard library, no extra packages needed by default!) 3. Run the application:

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📊 Output Example

CSV output file:
duplicate_files_<foldername>_<timestamp>.csv

checksum	file_path	duplicate_count
a3f4c2e1	/path/to/duplicate1.txt	3
a3f4c2e1	/path/to/duplicate2.txt	3
a3f4c2e1	/path/to/duplicate3.txt	3
b5e8d1f9	/path/to/another_duplicate.docx	2

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⚙️ Options & Controls

• Browse: Pick a folder to scan.
• Find Duplicates: Starts scanning in a background thread (UI stays responsive).
• Pause / Resume: Temporarily stop and continue scanning without losing progress.
• Cancel: Abort scan and reset progress bar instantly.
• About: Shows app version and credits.

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🛠️ Tech Stack

• Language: Python 3
• GUI: Tkinter (cross-platform native GUI)
• Logic: os, zlib, threading, csv, subprocess

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👨‍💻 Author

Arnav Dutta

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📜 License

This project is licensed under the MIT License - see the LICENSE file for details.