code: public static void main(String[] args) {
          try {
              javax.xml.parsers.SAXParserFactory fac = javax.xml.parsers.SAXParserFactory.newInstance();
              fac.setNamespaceAware(true);
              fac.setValidating(false);
              XMLReader parser = fac.newSAXParser().getXMLReader();
              parser.setContentHandler(new HtmlSerializer(System.out));
              parser.parse(args[0]);
          } catch (Exception e) {
              throw new RuntimeException(e);
          }
      }
docs: Used for testing. Pass a file:// URL as the command line argument.