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 stop or prevent users from editing directly in cells in Excel. You have to lock and protect Cells in Excel by following these steps.

Sending Excel files containing crucial financial and business data has risks. To add a layer of protection, you should learn to password protect an Excel file.

If you are opening an Excel file that has been saved before, you can still protect it with a password by following the first method. If you want to restrict users from editing your Excel file, you ...

Make sure that no one else can edit a document by making it read-only. In Word, click the File menu. Select Info > Protect Document to view your security options. Select Always Open Read-Only.

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.