I have PDF with hidden text in existing.pdf . While copying pdf , I am able to view the hidden text in output pdf. Is there any class or method to remove hiddent text from pdf ?

 

Below is the code. I know, PDFCopy will not copy hidden text to output.pdf. I dont want to use PDFCopy tough.

 

String existingPdf = "existing.pdf";
  try {
   PdfReader reader = new PdfReader(existingPdf);
   File outFile = new File("output.pdf");
   Document document = new Document(reader.getPageSizeWithRotation(1));
   PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(outFile));
   document.open();
      PdfContentByte cb = writer.getDirectContent();   
   for (int i = 1; i <= reader.getNumberOfPages(); i++) {
    document.newPage();
    System.out.println(i);
    PdfImportedPage page = writer.getImportedPage(reader, i);
    cb.addTemplate(page, 0, 0);
   }
   document.close();

 

 

Thanks,

Peter