Easily add QR encoded data to any post using a simple mark-up.

WP-QREncoder

Allows post authors to easily add qrencoded images to their posts. Uses: QRcode Perl CGI & PHP scripts ver. 0.50: http://www.swetake.

Luke America

This plugin is a QR Code (Quick Response) generator for mobile tagging. It allows you to create one of the ever-popular QR Codes anywhere on a page/post or in a text widget. A simple shortcode defaults to generating the 2d code for the current page/post.
Plus, attributes allow you to set the: size, color, url (or email, text, phone number, vcard, sms, etc.), tooltip, image format (png or jpg), and error correction level … along with an option to use a shortened url.
More details are available under Installation (above) and at Dashboard->WCS-QR-Code (after activation).
<h3>Additional Information</h3>
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View <a href="http://wpcodesnippets.info/blog/wcs-qr-code-generator.html" title="Plug-in Landing Page" rel="nofollow ugc">details for this plug-in</a> at our web site.
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View the full <a href="http://wpcodesnippets.info/blog/how-to-add-qr-codes-to-your-blog.html" title="Source Code Details" rel="nofollow ugc">source code</a> explanation for the prototype of this plug-in. This page also includes a variety of useful information regarding QR Codes.
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Visit our web site, <a href="http://wpcodesnippets.INFO" title="WP Code Snippets" rel="nofollow ugc">wpCodeSnippets.INFO</a>, for lots of WordPress tips, tweaks, shortcodes, and plugins.
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This plug-in is released under the GNU General Public License (GPL2). No external services are required and there are no additional features to purchase.
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<h3>Donations</h3>
Did you find this plug-in useful? A small <a href="https://www.paypal.com/cgi-bin/webscr?cmd=_donations&currency_code=USD&business=LukeAmerica2020%40gmail.com&item_name=WP%20Code%20Snippets%20donation&amount=0.00&image_url=http://wpcodesnippets.info/files/paypal_header.png" title="Support Future Development" rel="nofollow ugc">donation</a> will be much appreciated AND it supports our continued WordPress development efforts. Enter any amount.

WCS QR Code Generator

This plugin is a QR Code (Quick Response) image generator for mobile tagging.

WP-QREncoder vs WCS QR Code Generator