Dave McHale

<p><strong>– This plugin has been adopted! Please review the description below. –</strong></p>
<p>A 404 page is what a user sees when they try to reach a non-existent page on your site (because they’ve clicked on a broken link, the page has been deleted or they’ve mistyped a URL).</p>
<p>While the standard 404 page can vary depending on your web host, it doesn’t usually provide the user with much useful information and users may just surf away from your site. Therefore, Google recommend creating a custom 404 page that provides the user with more information about your site and its content.</p>
<p>The Google 404 widget is a quick and easy way to embed a search box on your custom 404 page and provide users with useful information designed to help them find the information they need. Where it can, the Google widget will also suggest other ways for the user to find the information they need, thus increasing the likelihood that they’ll continue to explore your site.</p>
<p>For best results, you should set up a <a href="http://www.google.com/webmasters/" title="Google" rel="nofollow ugc">Google webmaster account</a> and submit an XML sitemap of your blog to ensure the Google 404 widget works effectively.</p>
<p>Find out more <a href="https://support.google.com/webmasters/answer/136085" rel="nofollow ugc">here…</a></p>
<h4>Features</h4>
<p>Currently the plugin outputs the Google 404 widget in US English by default, or tries to use the current WordPress language.<br />
You can use the <code>google_404_language</code> filter to specify a different language code.</p>
<p>Also looking to add the possibility to <a href="https://support.google.com/webmasters/answer/100044" rel="nofollow ugc">change the appearance</a> of the widget.</p>
<h4>Please note</h4>
<p>The Google 404 widget plugin is NOT a WordPress widget.<br />
It is simply the term Google use to describe their enhanced 404 page script.</p>
<h4>Adoption Story</h4>
<p>This plugin was originally developed by <a href="https://profiles.wordpress.org/husobj/" rel="nofollow ugc">Ben Huson</a> and was adopted in September 2014 thanks to the <a href="https://wordpress.org/plugins/tags/adopt-me" rel="ugc">adopt-me</a> tag.</p>
<h4>Coming Soon!</h4>
<p>The ability to customize the CSS from an options page within the WordPress Admin area, attempt to dynamically inject the Google search box without needing to modify your template files, and more!</p>


404 Widget for Google

Add Google search capabilities to your site's 404 "page not found" template.

FAKTOR VIER

<p>Sometimes the WordPress default error page handling is not enough, because it only shows a simple text or you have to create a custom 404 template with (more) static content.<br />
<a href="https://www.f4dev.ch" rel="nofollow ugc">F4 Error Pages</a> allows you to assign any existing page from your installation to be shown, if a page is not found or the permissions for a request is denied.<br />
So you can create nice and informative error pages with your own content elements or whatever you like, fast, without overhead and unnecessary features.</p>
<h4>Usage</h4>
<p>After installation you can assign existing pages as error pages. By default there are no pages assigned.<br />
You can access the settings page either if you click the ‘Settings’ link in the plugins list or you can find it directly in the menu (Settings -> Error Pages).</p>
<h4>Features overview</h4>
<ul>
<li>Show custom page if requested url is not found (404)</li>
<li>Show custom page if permission is denied (403)</li>
<li>Easy to use</li>
<li>Lightweight and optimized</li>
<li>100% free!</li>
</ul>


F4 Error Pages

With this simple plugin you can assign custom pages (with custom content etc.) as error pages. This works for 404 (page not found) and 403 (forbidden/ …

404 Widget for Google vs F4 Error Pages