There are several ways to password protect a PDF, including:
- Using Adobe Acrobat Pro DC: This is a paid program that allows you to password protect a PDF by setting a password to open the document or to restrict editing and printing. It is available for both Windows and Mac.
- Using the Print function: Open the PDF document, click on the “File” menu and select “Print.” From the printer options, select “Save as PDF” and then choose a location to save the new PDF document. While saving you will be prompted to set a password.
- Using a third-party PDF editor: There are several third-party PDF editors available for Mac, such as PDFelement, PDF Expert, and PDFpen, which provide the feature to password protect a PDF.
- Using online PDF editor: There are several online editors available, such as Adobe Acrobat online, Smallpdf, or PDFescape, which allow you to password protect a PDF.
- Using command line tool: You can use a command-line tool such as Ghostscript to encrypt a PDF with a password.
When a PDF is password protected, it can only be opened with the correct password and the permissions (like editing, printing) can be restricted as per the password set. It’s important to keep the password safe and don’t share it with anyone.
