yannishimself

QR Code Generator creates scannable QR codes for your WordPress content. Each post, page, or WooCommerce product gets a compact short URL (<code>/go/{base36}</code>) that 301-redirects to the original permalink.
Key Features:
<ul>
<li>Pure PHP QR code engine — no external APIs, no JavaScript rendering</li>
<li>Short URLs via <code>/go/{base36}</code> with permanent 301 redirects</li>
<li>Works with posts, pages, and WooCommerce products</li>
<li>Customizable pixel size, quiet zone, and colours</li>
<li>One-click generate, download, and copy from the editor sidebar</li>
<li>Lightweight — only requires the PHP GD extension</li>
<li>ISO/IEC 18004 compliant QR encoding</li>
</ul>
How It Works:
<ol>
<li>Edit any post, page, or product</li>
<li>Find the “QR Code” meta box in the sidebar</li>
<li>Click “Generate QR Code”</li>
<li>Download the PNG or copy the short URL</li>
</ol>

FARM QR Code Generator

Generate scannable QR codes with short, branded redirects for any post, page, or WooCommerce product. Pure PHP, no APIs.

harman79

If you like working with shortlinks, then this plugin is for you!
<ul>
<li>Creates an extra column displaying shortlinks in the main post, page, categories and media list screens; for the media list screen it also adds the file URL info.</li>
<li>Adds an optional button next to each shortlink. When this button is clicked the shortlink is automatically copied to the clipboard.</li>
<li>Adds an inner post/page shortlink button, just as it was for WordPress versions earlier then 4.4.</li>
<li>Works for built in and custom post types and taxonomies. </li>
<li>Provides settings page to customise basic appearance/functionality features.</li>
</ul>
Unless you have Javascript disabled, the auto-copy function is supported by all major browsers, apart from Safari, which does not support the execCommand copy function of Javascript.

Shortlink & File URL Column

Adds a shortlink column in post/page, taxonomy and media manage screens. Also retrieves inner post shortlink button as for WP earlier than 4.4.

FARM QR Code Generator vs Shortlink & File URL Column