How to Set Password and Permissions on a PDF

using IronPdf;

// Create an instance of ChromePdfRenderer to render HTML to PDF
ChromePdfRenderer renderer = new ChromePdfRenderer();

// Render a simple HTML string as a PDF document
PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>Secret Information:</h1> Hello World");

// Set the owner's password to restrict editing permissions
pdf.SecuritySettings.OwnerPassword = "123password";

// Set the user's password to restrict opening the document
pdf.SecuritySettings.UserPassword = "password123";

// Save the protected PDF to a file named 'protected.pdf'
pdf.SaveAs("protected.pdf");

Imports IronPdf



' Create an instance of ChromePdfRenderer to render HTML to PDF

Private renderer As New ChromePdfRenderer()



' Render a simple HTML string as a PDF document

Private pdf As PdfDocument = renderer.RenderHtmlAsPdf("<h1>Secret Information:</h1> Hello World")



' Set the owner's password to restrict editing permissions

pdf.SecuritySettings.OwnerPassword = "123password"



' Set the user's password to restrict opening the document

pdf.SecuritySettings.UserPassword = "password123"



' Save the protected PDF to a file named 'protected.pdf'

pdf.SaveAs("protected.pdf")

using IronPdf;

// Load a PDF document from a file using IronPdf, providing the path to the file and the password for decryption.
var pdf = PdfDocument.FromFile("protected.pdf", "password123");

// Perform your PDF-related tasks here, such as reading content, modifying, or extracting information.
// Example: You might want to access text or images within the PDF, or manipulate its pages.

// Save the modified PDF document to a new file.
// This creates a new PDF file "protected_2.pdf" with the modifications made.
pdf.SaveAs("protected_2.pdf");

Imports IronPdf



' Load a PDF document from a file using IronPdf, providing the path to the file and the password for decryption.

Private pdf = PdfDocument.FromFile("protected.pdf", "password123")



' Perform your PDF-related tasks here, such as reading content, modifying, or extracting information.

' Example: You might want to access text or images within the PDF, or manipulate its pages.



' Save the modified PDF document to a new file.

' This creates a new PDF file "protected_2.pdf" with the modifications made.

pdf.SaveAs("protected_2.pdf")

using IronPdf;

// This code snippet demonstrates how to open an encrypted PDF file,
// modify its security settings to make it read-only, and then save it.

try
{
    // Open an encrypted PDF file with the specified password.
    var pdf = PdfDocument.FromFile("protected.pdf", "password123");

    // Edit the file security settings.
    // This ensures the PDF becomes read-only and certain user actions are restricted.

    // Remove existing passwords and encryption from the document.
    pdf.SecuritySettings.RemovePasswordsAndEncryption();

    // Make the PDF document read-only, using a specified key for additional security.
    pdf.SecuritySettings.MakePdfDocumentReadOnly("secret-key");

    // Set user permissions:

    // Disallow adding annotations to the PDF.
    pdf.SecuritySettings.AllowUserAnnotations = false;

    // Disallow copy & paste of content from the PDF.
    pdf.SecuritySettings.AllowUserCopyPasteContent = false;

    // Disallow filling forms or submitting form data.
    pdf.SecuritySettings.AllowUserFormData = false;

    // Allow full rights for printing the PDF.
    pdf.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.FullPrintRights;

    // Save the modified PDF as a new file, with enhanced security settings.
    pdf.SaveAs("secured.pdf");

    // Inform the user of successful completion.
    Console.WriteLine("The PDF has been secured and saved as 'secured.pdf'.");
}
catch (Exception ex)
{
    // Handling exceptions that might occur due to file access or processing errors.
    Console.WriteLine("An error occurred: " + ex.Message);
}

Imports IronPdf



' This code snippet demonstrates how to open an encrypted PDF file,

' modify its security settings to make it read-only, and then save it.



Try

	' Open an encrypted PDF file with the specified password.

	Dim pdf = PdfDocument.FromFile("protected.pdf", "password123")



	' Edit the file security settings.

	' This ensures the PDF becomes read-only and certain user actions are restricted.



	' Remove existing passwords and encryption from the document.

	pdf.SecuritySettings.RemovePasswordsAndEncryption()



	' Make the PDF document read-only, using a specified key for additional security.

	pdf.SecuritySettings.MakePdfDocumentReadOnly("secret-key")



	' Set user permissions:



	' Disallow adding annotations to the PDF.

	pdf.SecuritySettings.AllowUserAnnotations = False



	' Disallow copy & paste of content from the PDF.

	pdf.SecuritySettings.AllowUserCopyPasteContent = False



	' Disallow filling forms or submitting form data.

	pdf.SecuritySettings.AllowUserFormData = False



	' Allow full rights for printing the PDF.

	pdf.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.FullPrintRights



	' Save the modified PDF as a new file, with enhanced security settings.

	pdf.SaveAs("secured.pdf")



	' Inform the user of successful completion.

	Console.WriteLine("The PDF has been secured and saved as 'secured.pdf'.")

Catch ex As Exception

	' Handling exceptions that might occur due to file access or processing errors.

	Console.WriteLine("An error occurred: " & ex.Message)

End Try