It seems like the only way to work with the .xfdf forms is to use Adobe Acrobat, the very software that was used in making these forms in first place. You have to load up the form in the program and use the save function to produce a PDF document. This will be just a document, not a form, noone will be able to add anything else to it.
Convert Adobe Acrobat forms document to Adobe Portable document format.
We found one software available in the database for this conversion.
Apple macOS / Mac OS X software - convert xfdf to pdf on OS X
Mac version of Adobe's PDF handling software
Convert from xfdf file format
|Yes, Adobe Acrobat for Mac supports pdf file conversion as a target file type.||Yes||Yes||pdf editor||Yes||No||No||No|
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.