PDF Conversor powered by Qt5, does NOT show up any GUI, just needs an URL string, then it Prints PDF, and returns file path string, uses UUID if no output filename is passed, optional Landscape orientation if supported, CSS3 Just Works!.

qpdf.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-


"""PDF Conversor powered by Qt5."""


from uuid import uuid4

from PyQt5.QtCore import QUrl
from PyQt5.QtNetwork import QNetworkProxyFactory
from PyQt5.QtPrintSupport import QPrinter
from PyQt5.QtWebKitWidgets import QWebView


class QPDF(QPrinter):

    """QPDF Printer."""

    def __init__(self, *args):
        """Initialize QPDF."""
        super(QPDF, self).__init__(*args)
        self.web, self.pdf_name = QWebView(), uuid4().hex + ".pdf"
        self.to_pdf, self.url_or_path = self.convert_to_pdf, None
        self.setPageSize(QPrinter.A4)
        self.setFontEmbeddingEnabled(True)
        self.setOutputFormat(QPrinter.PdfFormat)
        self.web.settings().setDefaultTextEncoding("utf-8")
        QNetworkProxyFactory.setUseSystemConfiguration(True)
        self.setPageMargins(10, 10, 10, 10, QPrinter.Millimeter)
        self.web.loadFinished.connect(lambda: self.web.print_(self))

    def _set_input_output(self, url_or_path, fyle, landscape):
        """Set the Input and Output for the processing if they are provided."""
        self.pdf_name, self.url_or_path = fyle, url_or_path
        self.setDocName(self.pdf_name.title())
        self.setOutputFileName(self.pdf_name)
        if hasattr(self, "setPageOrientation"):  # Qt > 5.3 only
            self.setPageOrientation(int(bool(landscape)))
        self.web.load(QUrl(self.url_or_path))
        return self.pdf_name

    def convert_to_pdf(self, _url, fyle=uuid4().hex + ".pdf", landscape=False):
        """Convert to PDF file from the arguments passed, at least an URL."""
        if _url and isinstance(_url, str) and len(_url):
            return self._set_input_output(_url, fyle, landscape)


##############################################################################


if __name__ in '__main__':
    from PyQt5.QtWidgets import QApplication
    app = QApplication([])
    conversor = QPDF()
    conversor.convert_to_pdf("https://google.com")
    # conversor.convert_to_pdf("https://google.com", "custom_filename.pdf")
    exit(app.exec_())

Rendering Chrome Experiments to PDF: from http://sysach.com/circle-game/ to Okular PDF Viewer.

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