Convert Password-Protected PDF file to DOCX in C# and .NET

Working with PDF files, especially password-protected ones, is a common task in document automation. In this guide, we'll explain how to convert a password-protected PDF to DOCX using PDF Focus .NET from SautinSoft SDK, implementing all the necessary steps in C# and .NET.

Protected PDF files are widely used to maintain document confidentiality. You may need to automatically extract their content for processing or editing. Using a specialized library helps make this process reliable and fast.

Task update:

• Document workflow automation: converting PDFs to editable formats. The code allows for integration into automated scripts, bots, or server-side applications.
• Processing protected documents: sometimes, for example, a company receives passwords and needs to automate the work.
• Compatibility: DOCX files allow for easy editing and integration with other systems.
• Accuracy: Preserving styles and formatting after conversion ensures professional results.

Important points when using the sample code:

• The code requires the correct password (`PdfPassword`).
• A page check is performed before conversion.
• A license key is required to use the library, or you can try the free demo version.

Sectors where this code is needed:

• Legal practice: extracting data from password-protected documents.
• Accounting and finance: automating the processing of financial reports protected by PDF.
• Contract processing: converting protected contracts into an editable format.
• Educational institutions: preparing password-protected educational materials.

Complete code

• C#
• VB.Net
GitHub

using System;
using System.IO;

namespace Sample
{
    class Sample
    {
        static void Main(string[] args)
        {
                                  // Get your free 30-day key here:   
			 // https://sautinsoft.com/start-for-free/
			
            string pdfFile = Path.GetFullPath(@"..\..\..\Example.pdf");
            string wordFile = "Result.docx";

            //Convert PDF file to Text file
            SautinSoft.PdfFocus f = new SautinSoft.PdfFocus();
            
            //Set a password for password-protected PDF documents. You need to set this option before "f.OpenPdf"
            f.Password = "123456789";

            f.OpenPdf(pdfFile);
            
            if (f.PageCount > 0)
            {
                int result = f.ToWord(wordFile);

                //Show Text document
                if (result == 0)
                {
                    System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(wordFile) { UseShellExecute = true });
                }
            }
        }
    }
}

Imports System
Imports System.IO

Namespace Sample
	Friend Class Sample
		Shared Sub Main(ByVal args() As String)
			Dim pdfFile As String = Path.GetFullPath("..\..\..\Example.pdf")
			Dim wordFile As String = "Result.docx"
	                                ' Get your free 30-day key here: 
	                                ' https://sautinsoft.com/start-for-free/
			
			'Convert PDF file to Text file
			Dim f As New SautinSoft.PdfFocus()

			'Set a password for password-protected PDF documents. You need to set this option before "f.OpenPdf"
			f.Password = "123456789"

			f.OpenPdf(pdfFile)

			If f.PageCount > 0 Then
				Dim result As Integer = f.ToWord(wordFile)

				'Show Text document
				If result = 0 Then
					System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(wordFile) With {.UseShellExecute = True})
				End If
			End If
		End Sub
	End Class
End Namespace

If you need a new code example or have a question: email us at support@sautinsoft.com or ask at Online Chat (right-bottom corner of this page).