Add Password to PDF with Permissions Leave feedback

GroupDocs.Merger for Python via .NET lets you protect a PDF document with an open password and simultaneously restrict specific operations — for example, prevent printing or modification — using PdfSecurityOptions combined with PdfSecurityPermissions.

1. Instantiate the Merger class with the path to the source PDF.
2. Create a PdfSecurityOptions instance with the desired password string.
3. Set the permissions property to one or more PdfSecurityPermissions enum values (e.g. DENY_PRINTING).
4. Call merger.add_password() and pass the PdfSecurityOptions object.
5. Call merger.save() with the output file path.

from groupdocs.merger import Merger
from groupdocs.merger.domain.options import PdfSecurityOptions, PdfSecurityPermissions

def add_password_to_pdf_with_permissions():
    # Load the source PDF document
    with Merger("./input.pdf") as merger:
        # Create PDF-specific security options with an open password
        security_options = PdfSecurityOptions("p@ss")
        # Deny printing so the recipient cannot print the document
        security_options.permissions = PdfSecurityPermissions.DENY_PRINTING
        # Apply the password and permissions
        merger.add_password(security_options)
        # Save the protected PDF
        merger.save("./output.pdf")

if __name__ == "__main__":
    add_password_to_pdf_with_permissions()

Binary file (PDF, 86 KB)

Tip

PdfSecurityPermissions values can be combined using the bitwise OR operator if you need to deny multiple operations at once.

• Load Source PDF: The Merger class is instantiated with the PDF to protect.
• Configure Security Options: PdfSecurityOptions("p@ss") creates an options object that both sets the open password and allows fine-grained permission control.
• Set Permissions: Assigning PdfSecurityPermissions.DENY_PRINTING to security_options.permissions prevents the recipient from printing the document after opening it.
• Apply and Save: merger.add_password() encrypts the document; merger.save() writes the secured PDF to disk.

Refer to the GroupDocs.Merger API Reference for the full list of PdfSecurityPermissions values.

• Add document password
• Remove document password
• Update document password