How to encrypt a PDF using Adobe Acrobat: Open the PDF and choose Tools > Protect > Encrypt > Encrypt with Password. If you receive a prompt, click Yes to change the security. Select Require a Password to Open the Document, then ty
PDFEncrypt is a free, open-source native Windows app that allows you to password protect (encrypt) PDF files for free, without purchasing expensive software. Now available in the Microsoft... · FAQ · License · MSI available (beta)
評分 4.2 (13,485) How To Password-Protect a PDF Document: · Import or drag & drop your file to our Protect PDF tool. · Type and confirm the strong password you'd like to use.
Right-click a file or folder and select Properties · Select the Advanced... · Select the Encrypt contents to secure data check box · Select OK to close the window, ...
Click the Select a file button above, or drag and drop a PDF into the drop zone. · Enter a password, then retype it to confirm the password. · Click Set password.