Aspose.Pdf.Kit is a .NET component to edit existing PDFs supporting window forms and ASP.NET applications. You can add/remove digital signatures or encrypt/decrypt a PDF. It supports XFA, adding CJK font in form field, bookmarks, PDF stamp creation, AcroForm, adding watermark or logo, extracting or adding images & text, append pages and converting PDF file to TIFF, BMP, PNG & JPG image formats. It enables you to concatenate PDF files and allows adding or setting XMP Metadata to an existing PDF.