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.

Learn how to password protect Microsoft Office documents like Word, PowerPoint and Excel using their built-in Permissions feature.

You worked hard to put that Excel sheet together, now protect it from unintended damage.

Need to keep a file confidential? Microsoft Word and Excel make it simple to assign a password.

In Word, Excel, or PowerPoint for Windows, open the file you want to protect with a password, then select File and Info. You should see a Protect option at the top of the next list: Click this ...

If you want to prohibit edits to the Excel file on the network, Excel includes "Read-Only" protection security in the workbook's settings.