<p>Allows you te set a page to be used as the 404 page. In order for the plugin to work you need to make some modifications to the <code>404.php</code> file in your theme. I set it this way so that the 404 page could be formatted to fit the theme, or can be set more dynamically.</p>
<p>For more information and sample code: http://www.reitzdesigns.com/2010/08/dynamic-404-page-wordpress-plugin/</p>
<p>Although this plugin will work with WordPress 2.8, it’s better suited for version 3.x.</p>


Dynamic 404 Page

Allows you to select a page to use as the content of your 404 page.

Kunal

<p><strong>Custom 404 Pro</strong> replaces WordPress’s default 404 behaviour with a proper redirect. Instead of leaving visitors on a dead-end error page, you can send them to any page on your site or an external URL — with the HTTP status code of your choice.</p>
<h4>Redirect Modes</h4>
<ul>
<li><strong>WordPress Page</strong> — pick any published page from a dropdown; the plugin redirects to it automatically.</li>
<li><strong>Custom URL</strong> — enter any absolute URL to redirect 404s off-site or to a specific path.</li>
<li><strong>HTTP Status Code</strong> — choose 301, 302, 307, or 308 to match your SEO or caching requirements.</li>
</ul>
<h4>404 Logging</h4>
<p>When logging is enabled, the plugin records every 404 hit to a database table so you can see exactly what is broken:</p>
<ul>
<li>Request path</li>
<li>Visitor IP address (can be disabled for privacy/GDPR compliance)</li>
<li>Referrer URL</li>
<li>User agent</li>
<li>Timestamp</li>
</ul>
<p>Logs are searchable and can be deleted individually, in bulk, or all at once. They can also be exported as a CSV file. A configurable retention policy lets you automatically cap the table by row count, by age, or both — with a daily background cleanup and an on-demand Prune Now button.</p>
<h4>Email Notifications</h4>
<p>Optionally receive an admin email each time a 404 is logged. Designed for low-traffic monitoring — if you expect high 404 volume, keep this off to avoid inbox flooding.</p>
<h4>Multisite Support</h4>
<p>Works correctly on WordPress Multisite installations — activation creates the logs table for each site in the network.</p>
<h4>Multilingual Support</h4>
<p>Compatible with <strong>Polylang</strong> and <strong>WPML</strong>. The redirect page is resolved to the correct language variant for the current visitor automatically.</p>


Custom 404 Pro

Take control of every 404 on your site — redirect visitors to a custom page or URL, log what broke, and get notified when it matters.

Dynamic 404 Page vs Custom 404 Pro