QRtool

QR-Code widget and shortcode in one QR-Code generator plugin. Use the QR-Code widget in your sidebars or generate QR-Codes in pages and articles by inserting [qr-code] right where you want your QR-Code to be displayed.
The QR Code widget is equipped with configurations for alignment, color (foreground and background), size, margin, error correction of QR-Code and more to suit the needs of your installment.
The shortcode [qr-code] can be extendet with attributes to achieve the same level of customization as with the widget. 
Example: 
[qr-code align=”left” class=”my-qr-code” color=”#000000″ background_color=”#FFFFFF” size=”4″ margin=”4″ level=”M” post_id=”0″]

WPQR QR-Code Generator

QR-Code widget and shortcode in one QR-Code generator plugin. Use the QR-Code widget in your sidebars or generate QR-Codes in pages and articles.

Artur Khylskyi

Generate QR Codes for your Posts, Pages and Custom Post Types.

Steeply QR

Generate QR Codes for your Posts, Pages and Custom Post Types.

WPQR QR-Code Generator vs Steeply QR