Convert PDF size to A4

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C#

Hi,

In our .net application there is a requirement to convert pdf size to A4.
Following is the code we are using to convert pdf size to A4

PdfReader reader = new PdfReader(pdfData);
                logInfo.DebugFormat("Converting to a4 page size");
                Document document = null;
                if (isPortrait)
                {
                    document = new Document(PageSize.A4);
                }
                else
                {
                    //create a4 landscape
                    document = new Document(PageSize.A4.Rotate());
                }
                PdfWriter writer = PdfWriter.GetInstance(document, outputData);
                writer.CloseStream = false;
                document.Open();
                //copy the page from the source pdf
                PdfContentByte directcontent = writer.DirectContent;
                PdfImportedPage page = writer.GetImportedPage(reader, 1);
                iTextSharp.text.Image image = iTextSharp.text.Image.GetInstance(page);
                //center the certificate
                if (isPortrait)
                {
                    image.SetAbsolutePosition(-9, 25);
                }
                else
                {
                    image.SetAbsolutePosition(25, -9);
                }
                directcontent.AddImage(image);
                document.NewPage();
                document.Close();
                reader.Close();

But the problem here is my pdf document has some hyperlinks which are clickable.
Since we are writing the pdfbytes as image onto document we are not able to click on hyperlinks because content is converted to an image.

Can you please anyone of you help me by poviding any solution to this or any other alterntive way to convert pdf size to A4?

Please help me its urgent. No, it's not (for us).

Thanks in Advance
Basanthi