Check out this list:
https://www.topattack.com/list/best-printers-convert-files-to-pdf/103
https://tools.pdf24.org/en/
https://www.pdfill.com/pdftool_encrypt.html
http://www.bullzip.com
Free pdf editor online:
https://www.sejda.com/pdf-editor
some how when you edit existing pdf, hyperlinks seems to be not working.