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.

I just performed a preliminary Google for "crack excel password" and a bunch of sites came up. I've used Squrf's method to get around Word passwords before, but I've never tried a spreadsheet.

There are several options available to you to protect your Excel file with a password. Remember that once you protect the Excel file, you cannot open it without entering the password.

Learn how to unprotect Excel sheets or workbooks without a password using this simple step-by-step guide. No software required!

You can add or remove a password from your Excel spreadsheets through the File tab. You'll do it slightly differently on a Mac and PC.

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.

Whether you’ve forgotten the password or received a protected file from someone else, unlocking an Excel spreadsheet without the password may seem like an insurmountable challenge.

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 ...

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.

How to Recover an Excel Password in OS X. The Mac operating system provides a way for you to lock Excel with a password to prevent unauthorized use by using Keychain Access.