https://pdfsam.org/
https://tinywow.com/
https://gotenberg.dev/
https://pdfcandy.com/fr/
https://github.com/dompdf/dompdf
http://stackoverflow.com/questions/1377446/html-to-pdf-for-a-django-site/1377652#1377652
http://www.wowebook.info/
http://html2pdf.fr/
http://docs.google.com/viewer