Is there any agpl compatible Python library or a product that creates PDF from json like this but has a wyswig PDF layout editor, like an invoice format builder ?
CxReports is a commercial product that lets you create PDFs from JSON using a WYSIWYG editor, perfect for building invoices. It can be hosted on-premise with Docker and has a Python client library. There’s a free tier allowing 500 PDFs/year.
https://cx-reports.com/
https://cx-reports.com/templates/invoices