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.

Want to protect an important Word document or Excel spreadsheet? Here's how to add a password, make documents read-only, and tap into other tricks to safeguard sensitive files.

Here’s how to lock cells in Excel, whether you’re on Windows 10 or macOS, and it's easy as pie. Learn how to lock cells in Excel and keep vital information on your spreadsheets secure.

Here is a tutorial to lock or hide only the formula cells in an Excel workbook. You can also lock formulas in all worksheets in a workbook.

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.

Password protect PDF, Excel, Word, Office documents, OneNote notes, Files, Folder, Zip, Games, Images, applications, programs, USB, Flash, Pen Drives.