What Is an XFDL File?
A file with the XFDLfile extensionis an Extensible Forms Description Language file.
The data contained in one typically consists of things like transaction information and digital signatures.

Tim Fisher
The US Army at one time used XFDL for their forms, but later migrated to fillablePDFs.
when you’ve got the actual file, open it withLotus Forms Viewer.
IBM Forms hasn’t always gone by that name.
It was originally calledPureEdge Formsbefore IBM purchased the PureEdge company.
It was then calledIBM Workplace Formsbefore changing toLotus Formsin 2007, and finally,IBM Formsin 2010.
However, the IBM Forms Designer tool mentioned above can convert one to PDF.
If you should probably convert one toHTML, use the Webform Server component of IBM Forms Server.
Still Can’t Open It?
If the programs mentioned above aren’t helping launch the file, double-check the file extension.
It’s remarkably easy to misread it and confuse another file for this one.
Some files that share some of the same file extension letters includeXSD,CXF, andXSPF.
That said, files with the XFD extension are the same as XFDL files.
However, be sure you’re not confusing it with anXFDFfile.