Code:
\title{QR codes and Barcodes in \LaTeX\ with \texttt{pst-barcode} package}
\date{}
\maketitle
\section{QR code: WWW page}
\begin{pspicture}(25mm,25mm)
\psbarcode{https://website.hack}{eclevel=H width=1.0 height=1.0}{qrcode}
\end{pspicture}