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.

To remove password protection from Excel, you need to open the spreadsheet and go to the File > Info section. Then, click on the Protect Workbook option and select the Encrypt with password option ...

A recommended approach to secure your most private documents — whether it’s a PDF, Word file, or Excel spreadsheet — is to lock them with a passcode. While this does help keep sensitive ...