Paolo Bertinetti

QRMemo is a versatile WordPress plugin that enables you to automatically generate and display QR codes at the end of specific post types. The QR codes added automatically contain the URL of the page or post they are appended to, making it easy for users to share or save the page.
The plugin also supports generating QR codes using a shortcode, allowing you to insert a QR code with custom text anywhere in your content.
Key Features: 
* Automatically add QR codes containing the page URL to the end of posts, pages, and other custom post types. 
* Customize which post types should display QR codes. 
* Generate QR codes via shortcode, specifying custom text, size, margin, and alignment.
Libraries Used: 
* <a href="https://github.com/endroid/qr-code" rel="nofollow ugc">Endroid QR Code</a> – A powerful library for generating QR codes in PHP.
<h3>License</h3>
This plugin is licensed under the GPLv2 or later. For more details, see <a href="https://www.gnu.org/licenses/gpl-2.0.html" rel="nofollow ugc">https://www.gnu.org/licenses/gpl-2.0.html</a>.

QRMemo

QRMemo is a WordPress plugin that adds QR codes to the end of selected post types and allows generating QR codes via shortcode.

Sanam Maharjan

This is a plugin for converting lots of posts or pages to a custom post type (or vice versa). In the ‘convert from…’ select option you will get the lists of all the post types stores in your current database and in the ‘convert to…’ option you will get the list of all the current registered post types. In addition to this you can also convert from one taxonomy to another and the lists are populated just as that of post types.

Post Type Convertr

A bulk conversion utility for post types and taxonomies.

QRMemo vs Post Type Convertr