The PDFs are not saved on our Server for security reason.

The html2pdf server is a dedicated web server located at http://www.maximumasp.com/.

We recommend using SSL: https://convert.html2pdf.seven49.net/ instead of http://convert.html2pdf.seven49.net/
Pease see
http://html2pdf.seven49.net/Web/en/Support/Parameters_for_html2pdf.htm

You can further increase security withthe following features:

• Add a GUID to your URL that you verify when html2pdf requests your PDFs. A GUID can not be guessed in practice.
• If you want to go even further make the URL only valid for a short time.
• You can also verify the IP address you can get by pinging "convert.html2pdf.seven49.net".

Uptime:
In 2008 we had a uptime of 99.943% including maintenance. If you set up your system in a clever way you can get even 100% by automatically trying again later if the system should be unavailable once and by caching results.