Dynamic PDF files are invaluable to automating document processes. XFA’s dynamic features allow your PDF forms to grow and reformat themselves depending on the data entered, allowing for a more dynamic user interaction than AcroForms allow. For example: In a form, your PDF file can generate new fields based on user responses and automatically fill them if you set the proper parameters.
Convert and protect
pdfXFA lets you program dynamic PDFs as well as convert them into static, protected PDF files to keep your data secure. pdfXFA is an add-on to the iText 7 platform, and as a closed-source project, it is only available with a commercial license.