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.

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.

Quite often there is a situation in which you don’t want other users to modify the data stored in your Excel file. It can either be because the data is confidential, or the fact that you simply do not ...