XLS Padlock

XLS Padlock is software designed to protect Excel files with passwords and encryption. The tool lets you lock worksheets, cells, and workbook structures to prevent unauthorized modifications. It supports XLS and XLSX formats, providing security for the management of confidential data.

★★★★★

5.0(1 ratings)

• Password protection. Lets you set strong passwords for Excel files, preventing unauthorized access. The password is applied using AES-256 encryption algorithms, ensuring security when documents are stored and transferred.
• Sheet locking. Restricts editing of specific sheets within an Excel workbook. Users can view the data but cannot modify it without the correct password. Ideal for sharing information without the risk of alterations.
• Cell protection. Lets you select individual cells or ranges to lock their contents. Supports differentiated permissions, leaving some cells editable while others remain protected.
• Full workbook encryption. Secures the entire Excel file with 256-bit encryption. Prevents unauthorized data extraction even if the file is copied or transferred.
• Macro compatibility. Preserves macro functionality while protecting the VBA code. Executable macros require authentication, preventing malicious tampering.
• Formula hiding. Hides formulas in protected cells to prevent them from being viewed or edited. Useful for preserving intellectual property and calculation methods.
• Print restrictions. Limits the ability to print documents or specific sheets. Controls the physical distribution of confidential information.
• Structure protection. Blocks changes to the workbook structure, such as adding, deleting, or renaming sheets. Only authorized users can modify the organization of the file.
• Two-factor authentication. Optionally lets you configure a second authentication factor for accessing protected files. Increases security against brute-force attacks.
• Activity logging. Generates logs of successful and failed access attempts. Provides an audit trail of who interacted with the file and when.
• Windows Active Directory integration. Lets you use domain credentials to authorize access to files. Simplifies centralized permission management in corporate environments.
• Secure compression. Reduces the size of protected files using optimized compression. Maintains encryption throughout the process to prevent data leaks.

XLS Padlock was initially developed in 2012 by a team of data security specialists. The software is written in C++ with .NET components for integration with Microsoft Excel. The first commercial version was released in 2013, focused on basic sheet protection. With annual updates, the program has added advanced features such as AES encryption and support for modern formats. The developers continue to improve the protection engine against cracking techniques.

Alternatives to XLS Padlock: