Michael Ott

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.
Notifications are also triggered by missing media, such as images, video, CSS files and more.
<h3>Support</h3>
Report any issues at the official <a href="https://wordpress.org/support/plugin/404-notify/" rel="ugc">404 Notify Support</a> WordPress page.
<h3>How to use</h3>
Once activated, notifications are automatially sent to the site administrator, or, you can specify an alternative email address in Settings -> General and look for the 404 Notify email address field.
<h3>Uninstall</h3>
Deactivate the plugin, delete if desired.

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.

Dinesh Pilani

compatshield

The Plugin Compatibility Checker helps you keep your WordPress site stable and secure by scanning installed plugins for PHP and WordPress version compatibility.
$1/month License Required (Entry Plan) 
You must subscribe to the CompatShield Portal ($1/month recurring) to obtain a license key. Once activated, you will be able to see plugin compatibility results (up to PHP 8.5) directly inside your WordPress admin.
📺 Video Tutorial 
Watch step-by-step how to activate your license & run your first scan: 
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/PCxhJmO-Tb4?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
Quick Setup Steps 
1) Subscribe → Get your license key from the Portal 
2) Add your domain inside the License tab 
3) Copy your License Key 
4) Paste License Key inside Plugin Settings in WP Admin 
5) Click Validate License 
6) Click Save Settings 
7) Go to Plugin Main Page → Click Rescan
Pro Version (Upgrade) 
Upgrading to Pro unlocks the full CompatShield Portal Dashboard with advanced features — vulnerability summary, detailed scan results, notifications, historic analysis, plugin issues overview, premium ZIP upload scanning, and multi-layer compatibility intelligence.
Subscribe / Upgrade to Pro: https://www.compatshield.com/
<h3>✨ Key Features</h3>
<ul>
<li>
PHP Compatibility Check – Scan plugins for PHP compatibility.
<ul>
<li>$1/month license: Shows PHP compatibility results directly inside WP Plugin backend (up to PHP 8.5)</li>
<li>Pro license: Deeper breakdowns, insights, and analysis inside Portal Dashboard</li>
</ul>
</li>
<li>
Plugin Rescan – Quickly rescan whenever you install or update plugins.
</li>
<li>
Email Notifications (Pro) – Get notified when scans complete or risks are detected.
</li>
<li>
Portal Integration (Pro) – View full detailed results in the CompatShield Portal Dashboard.
</li>
<li>
Vulnerability Summary (Pro) – Basic vulnerability insights available in the Portal.
</li>
<li>
“No Data” Plugins Handling – Easily identify custom/premium plugins or removed versions not available on WordPress.org.
</li>
</ul>
<h3>🔑 Entry Plan vs Pro Plan</h3>
<ul>
<li>
PHP Compatibility Check 
$1 Plan: WP Admin Results up to PHP 8.5 
Pro Plan: Detailed compatibility insights in Portal Dashboard
</li>
<li>
Vulnerability Summary 
$1 Plan: Not available 
Pro Plan: Available in Portal
</li>
<li>
Email Notifications 
$1 Plan: Not available 
Pro Plan: Available
</li>
<li>
Portal Dashboard 
$1 Plan: Not available 
Pro Plan: Full access (compatibility + vulnerabilities + detailed summaries + site overview)
</li>
<li>
Custom/Premium Plugins ZIP Scanning 
$1 Plan: Not available 
Pro Plan: Supported via Portal ZIP uploader
</li>
</ul>

Plugin Compatibility Checker

very helpful to check our plugin compatibility


The plugin checks in free version up to php 8.0+ compatibility. Who needs to know if a plugin is compatible with an obsolete version of php ?


A joke ?


The free version gave me a basic idea, but the paid version was way more useful. It caught PHP issues that I wouldn’t have noticed before updating. Glad I upgraded because it saved me time fixing errors later. Definitely more helpful when running sites on newer PHP versions.


Actually prevented a break on upgrade

Scan and check your plugins for PHP and WordPress compatibility. Requires a $1/month Portal subscription to obtain a license key.

404 Notify vs Plugin Compatibility Checker