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.

Sending important documents? Learn how to password protect PDFs for extra security using easy steps with Adobe Acrobat and free online tools.

To password protect a PDF in Adobe Acrobat Reader, you'll need the paid Pro version, which starts at $14.99 a month.

Tech guru Kurt "CyberGuy" Knutsson explains how to password-protect files or folders in the cloud and on file-sharing platforms like Microsoft Word, OneDrive and Google Drive.

Do you share PDF documents with people? Here's a guide on how to password protect a PDF on Mac to protect it from unauthorized access, editing, and printing.

The best way to protect any document you have to send by email is to create a password to control both access and in some cases, ensuring the document can’t be changed.

To password protect parts of a Word document, you need to add a Continuous Section Break first. Then, you can go to the Review tab and use the Restrict Editing option.

“Is there any way to password-protect and lock a sensitive PDF file before sending it as an attachment through email? I cannot afford Adobe Acrobat Pro and free primopdf didn’t work for me ...

Adding password protection to a PDF can make the file even more secure and is the best practice when sharing any sensitive information.