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.

At the file level, you can password protect an Excel workbook in two ways: You can determine who can get in and who can save changes.

You can add or remove a password from your Excel spreadsheets through the File tab. You'll do it slightly differently on a Mac and PC.

People tend to use passwords to protect their Excel files for numerous reasons. For example, if you are having sensitive data with regards to your business in an Excel file, you need to password ...