PDF utilities to fill PDFs via FDF and manipulating them with PDFtk
Package fdf provides functions to generate FDF (Forms Data Format) useful for filling PDF forms with data.
https://pkg.go.dev/github.com/patiek/go-pdftools/fdf
Package pdftk provides wrapper functions for calling PDFtk commands.
Expects command line executable of pdftk or pdftk-java to be installed.