FDF – Forms Data Format

What is the FDF format

FDF (Forms Data Format) is a specialized file format used for storing interactive form data in PDF documents. It follows the same COS syntax as PDF and was introduced in PDF 1.2.

FDF is commonly used for submitting form data to a server, receiving the response, and integrating it into interactive forms. It also enables the export of form data to separate files that can be stored, transmitted electronically, and later imported back into the corresponding PDF form.

Furthermore, starting from PDF 1.3, FDF can serve as a container for annotations that are independent of the PDF document they pertain to.

For more technical information, refer to clause 12.7.8 of the ISO 32000-2:2020 standard.

How do I open a FDF file

To open an FDF (Forms Data Format) file, you will need software that supports handling interactive form data within PDF documents, such as Adobe Acrobat or other PDF readers and editors.

Programs that support FDF file on Windows:

  • Adobe Acrobat
  • Adobe Reader

Programs that support FDF file on Mac OS:

  • Adobe Acrobat

How do I convert FDF to PDF

You can easily convert FDF to PDF using PDF2Go's online converter.