Protect and Unprotect

Encrypt and decrypt Excel files

To prevent others from accessing data in Excel files, protect Excel file with a password.

Protect and unprotect workbook

To prevent other users from viewing hidden worksheets, adding, moving, deleting, or hiding worksheets, and renaming worksheets, you can protect the structure of your Excel workbook with a password.

Protect and unprotect worksheet

To prevent other users from accidentally or deliberately changing, moving, or deleting data in a worksheet, you can lock the cells on your Excel worksheet and then protect the sheet with a password.

Protect and unprotect shared workbook

Protect and unprotect the shared workbook.

Digital signature in Office files

Protect the authenticity of a document’s content, you can add a digital signature.