Michael Ott

<p>It’s often too easy to make edits to your web site that result in a broken link. This plugin will automatically email the web site administrator (or a specified email address) whenever a 404 is encountered, along with a link to the page the 404 originated from. With this knowledge in hand, you can search the page for the problem and either remove or fix it.</p>
<p>Notifications are also triggered by missing media, such as images, video, CSS files and more.</p>
<h3>Support</h3>
<p>Report any issues at the official <a href="https://wordpress.org/support/plugin/404-notify/" rel="ugc">404 Notify Support</a> WordPress page.</p>
<h3>How to use</h3>
<p>Once activated, notifications are automatially sent to the site administrator, or, you can specify an alternative email address in <strong>Settings</strong> -> <strong>General</strong> and look for the <strong>404 Notify email address</strong> field.</p>
<h3>Uninstall</h3>
<p>Deactivate the plugin, delete if desired.</p>


404 Notify

It works as presented. When an internal link leads to 404 you get an email alert. 

Job well done

Get a notification whenever a 404 is encountered on your web site.

BoldGrid

Brad Markle

<p>Theme Grep is a plugin designed to help review WordPress themes. While Theme Check and Theme Sniffer are designed to find specific issues, Theme Grep was built to help automate some of the searches (greps) used to “snoop around” the theme’s code.</p>


Theme Grep by BoldGrid

Theme Grep helps to review WordPress themes by automating many searches (greps) used to "snoop around" the theme's code.

404 Notify vs Theme Grep by BoldGrid