If you have sensitive data you'd like to keep from prying eyes in a Microsoft Excel file, the easiest way to protect it is with Excel's built-in password tools.

There are several options available to you to protect your Excel file with a password. Remember that once you protect the Excel file, you cannot open it without entering the password.

If you would like to make sure that your Excel spreadsheet data is secure this guide will show you how to password protect and hide worksheets ...

While password protection and encryption are excellent ways to secure your Excel workbook, they aren't foolproof and may cause compatibility issues with some third-party applications.

Sending Excel files containing crucial financial and business data has risks. To add a layer of protection, you should learn to password protect an Excel file.

Once you lock a cell, you'll be asked to set a password. Excel will ask you for this password if you try to unlock the cell. Visit Business Insider's homepage for more stories.