pluginkollektiv

<p>When a post is saved or published, this plugin will</p>
<ul>
<li>scan the post’s content for any URLs,</li>
<li>ping all the URLs found (except relative ones),</li>
<li>detect any broken or unreachable URLs and list them for review and correction.</li>
</ul>
<p>No more publishing of links or images broken by typos or incompletely copy-pasted URLs!</p>
<h3>Support</h3>
<ul>
<li>Community support via the <a href="https://wordpress.org/support/plugin/spcl" rel="ugc">support forums on wordpress.org</a></li>
<li>We don’t handle support via e-mail, Twitter, GitHub issues etc.</li>
</ul>
<h3>Contribute</h3>
<ul>
<li>Active development of this plugin is handled <a href="https://github.com/pluginkollektiv/spcl" rel="nofollow ugc">on GitHub</a>.</li>
<li>Pull requests for documented bugs are highly appreciated.</li>
<li>If you think you’ve found a bug (e.g. you’re experiencing unexpected behavior), please post at the <a href="https://wordpress.org/support/plugin/spcl" rel="ugc">support forums</a> first.</li>
<li>If you want to help us translate this plugin you can do so <a href="https://translate.wordpress.org/projects/wp-plugins/spcl" rel="nofollow ugc">on WordPress Translate</a>.</li>
</ul>
<h3>Credits</h3>
<ul>
<li>Author: <a href="https://sergejmueller.github.io/" rel="nofollow ugc">Sergej Müller</a></li>
<li>Maintainers: <a href="https://pluginkollektiv.org" rel="nofollow ugc">pluginkollektiv</a></li>
</ul>


Save Post. Check Links.

Verifies URLs of links in your content are reachable when saving a post in WordPress.

wp-buy

<p>This plugin will help to replace broken images in posts and pages with a default image.</p>
<h4>Features</h4>
<ul>
<li>Replace broken images with a default image</li>
<li>Custom image redirection</li>
<li>SEO Image Redirect</li>
</ul>
<h4>Requirements</h4>
<ul>
<li>WordPress 3.8+</li>
<li>PHP 5.2+ (or 5.5+ if you use the Browscap data file)</li>
<li>MySQL 5.0.3+</li>
<li>At least 20 MB of free web space</li>
<li>At least 5 MB of free DB space</li>
<li>At least 32 Mb of free PHP memory for the tracker (peak memory usage)</li>
<li>IE9+ or any browser supporting HTML5, to access the reports</li>
</ul>
<h4>Support</h4>
<p>We’re happy to help.  Here are a few things to do before contacting us:</p>
<ul>
<li>You can also contact us at wp@wp-buy.com if you have any enquiry.</li>
</ul>


404 Image Redirection (Replace Broken Images)

This plugin will help to replace broken images in posts and pages with a default image. Powerful & easy to use :)

Save Post. Check Links. vs 404 Image Redirection (Replace Broken Images)