• Populate a PDF file's form fields by familiar name-value pairs and create a new completed PDF form or file. You can set both value and formatted display string of a field. • Stamp images into the specified form field. • Set the general options of form objects and modify the properties of a form field. • Set the default value of fields. • Return the type of form object by name. • Set and/or get the list of items of combo boxes or list boxes. • Import form data from a FDF, XFDF or XML file into a PDF template and create a new merged PDF form or file; Import form data from a memory buffer. • Extract form data field by field directly from a PDF form or from a FDF/XFDF/XML file. • Export data from a PDF form and create a new form data file in FDF, XFDF (XML-based FDF) or XML format; Write form data to a memory buffer. • Create a FDF, XFDF or XML data file from name-value pairs. • Flatten a PDF form to remove the fields and stamp the content into the document. • Add security (native 40-bit & 128-bit PDF encryption) to your PDF forms to prevent anyone from changing it or altering the information. • Retrieve or set the information of PDF documents. • Write a completed PDF file to a memory buffer. • Digitally Sign a PDF Document. • Security Features: Add security (40-bit & 128-bit) to any PDF files; Change or Remove the encryption of your PDF documents. • Utility Features: Merge PDF documents; Split PDF document. • Utility Features: Merge interactive PDF form file. • Set the opening display options (Viewer Preferences) for the document. • Stamp stylized text directly on the specified page.

Render PDFs: High performance PDF libraries to render PDF pages, page objects, annotations, and forms the way they were intended to be viewed: sharp, clear, accurate, and easy to read. Allows applications to view, zoom in, zoom out, and print PDF documents and forms. Reflow: PDF is a fixed-layout flat document format, it cannot automatically word wrap according to the width of a page. Reflow is a function that automatically rearranges page content when the page size changes. Asynchronous support: Asynchronous is a method to access PDF pages without loading the whole document, so applications do not have to wait for the whole PDF file to be downloaded before accessing them. For example, readers can start reading the first page while the rest of the document is still loading. Page organization: Merge and combine specified page ranges from different PDF files into a single PDF. Annotations: Annotations are a very powerful feature within PDF. It enhances the interactivity between collaborating colleagues to share ideas and feedback. The PDF SDK provides APIs for annotation creation, properties access, and modification (appearance setting and drawing). It also provides APIs to export and import all annotations from and to PDF and FDF document.