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 exporting form data to separate files that can be stored, transmitted electronically, and later imported back into the corresponding PDF form.

Starting with PDF 1.3, FDF can also be used as a container for annotations that are independent of the PDF document they refer to.

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

How do I open an FDF file?

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

Programs that support FDF files on Windows:

  • Adobe Acrobat
  • Adobe Reader

Programs that support FDF files on Mac OS:

  • Adobe Acrobat

How do I convert FDF to PDF?

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