Excel Sheet Password Cracker

Overview

This Python application removes sheet protection from Excel .xlsx files by eliminating <sheetProtection .../> tags from worksheet XML files. It uses the zipfile module to modify the XML content within the Excel archive structure.

Features

• Select an Excel file (.xlsx) using a graphical user interface (GUI).
• Remove sheet protection from all worksheets within the file.
• Save the modified, unprotected version as a new .xlsx file.

Prerequisites

Ensure you have Python installed on your system (Python 3.x recommended). You also need the following libraries:

• tkinter (built-in with Python)
• zipfile (built-in with Python)
• os (built-in with Python)
• re (built-in with Python)

Installation

Clone the repository or download the script file.

# Clone the repository
git clone https://github.com/Demoen/excel-password-cracker.git
cd excel-password-cracker

No additional dependencies are required beyond standard Python libraries.

Usage

1. Run the script:

   python excel_password_cracker.py

2. In the GUI:

   • Click "Select Input File" to choose the protected .xlsx file.
   • Click "Unprotect Excel File" and specify a location to save the new unprotected file.
   • The modified file will be saved without sheet protection.

How It Works

1. The script extracts the .xlsx file, which is essentially a ZIP archive containing XML files.
2. It searches for <sheetProtection .../> tags inside xl/worksheets/*.xml files.
3. The script removes these protection tags and reconstructs the .xlsx file without modifying any other content.

Limitations

• This tool only removes sheet protection; it does not remove workbook-level passwords.
• Does not recover lost passwords; it simply removes protection tags.
• Some Excel protection mechanisms might not be affected by this method.

License

This project is licensed under the MIT License.

Disclaimer

This tool is intended for educational and personal use only. Ensure you have permission to modify any Excel files you process with this script.

Author

Demoen

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Feel free to modify and contribute to this project!