Description

The Plugin Compatibility Checker helps you keep your WordPress site stable and secure by scanning installed plugins for PHP and WordPress version compatibility.

Free License (0 cost) Required
You must register in the CompatShield Portal to obtain a Free License key. Once activated, you will be able to see plugin compatibility results (up to PHP 8.4) directly inside your WordPress plugin backend.

📺 Video Tutorial
Watch step-by-step how to activate license & run your first scan:

Quick Setup Steps
1) Register in Portal Add your domain inside License tab
2) Copy your License Key
3) Paste License Key inside Plugin Settings in WP Admin
4) Click Validate License
5) Click Save Settings
6) Go to Plugin Main Page Click Rescan

Pro Version (Upgrade)
Upgrading to Pro unlocks the CompatShield Portal Dashboard with advanced features — real-time notifications, detailed scan summaries, site overview, plugin summary mapping, vulnerability insights, historic analysis and custom ZIP upload scanning for premium/custom code.

Get Free License / Upgrade to Pro: https://www.compatshield.com/

✨ Key Features

PHP Compatibility Check – Scan plugins for PHP compatibility.
- Free license: Shows PHP compatibility results directly inside WP Plugin backend (up to PHP 8.4)
- Pro license: Detailed breakdowns, analysis and impact results in Portal Dashboard
Plugin Rescan – Quickly rescan whenever you install or update plugins.
Email Notifications (Pro) – Get notified when scans are completed or risk detected.
Portal Integration (Pro) – View full detailed results in the CompatShield Portal Dashboard.
Vulnerability Alerts (Pro) – Vulnerability & security data only available in the Portal.
“No Data” Plugins Handling – Easily identify custom/premium plugins or removed versions not available on WordPress.org.

🔑 Free vs Licensed

PHP Compatibility Check
Free License: WP Admin Results up to PHP 8.4
Pro License: Deep detailed results inside Portal Dashboard
Vulnerability Scan
Free: Not available
Pro: Available inside Portal Dashboard
Email Notifications
Free: Not available
Pro: Available
Portal Dashboard
Free: Not available
Pro: Full access (compatibility + vulnerabilities + detail summaries + site overview)
Custom/Premium Plugins Data
Free: Not available
Pro: Supported via ZIP upload scan

Screenshots

The main plugin interface with scan results.
Example of plugins listed after rescan.
Fetching the latest results from the Portal.
Viewing detailed compatibility and vulnerabilities (Portal).

Installation

Upload plugin-compatibility-checker to the /wp-content/plugins/ directory.
Activate the plugin through the Plugins menu in WordPress.
Register in the Portal and enter your Free License key to unlock compatibility up to PHP 8.4.
(Optional) Upgrade to Pro to enable Portal dashboard and advanced features.

FAQ

What happens if I don’t activate a license?: You must first register and activate at least the Free License to see PHP 8.4 compatibility results. Without license activation, visibility will be limited. Pro unlocks dashboard analytics, notifications and vulnerability insights.
Why does a plugin show “No Data”?: This usually means the plugin is either custom/premium or its version has been removed from WordPress.org.
Do I need to rescan after adding new plugins?: Yes, please click Rescan to include new plugins in the compatibility check.

Reviews

rubigma 🍂 1️⃣1️⃣ 4, 2025

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.

bhammondCVL 🍂 1️⃣1️⃣ 3, 2025

The plugin will only check major-version compatibility (6, 7, 8) without paying $20/month for a service subscription. If you want to try that, go for it. The free version, though, will not tell you much that is useful.

Li-An 🍂 1️⃣1️⃣ 2, 2025 2 replies

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 ?

q120000 🗓️🗓️7️⃣ 17, 2025

PCC is very convenient when deciding to update Wordpress and PHP versions. With one click of the mouse it will provide helpful information letting you know ahead of time which plugins might cause issues of compatibility. And is especially helpful with Multisite installations that have several plugins being used with various sub-sites. Thank you Dinesh.

Jarko Piironen 🌸4️⃣ 16, 2023

The plugin is a great tool I use for new clients to get an overview of versions of the installed plugins, supported WordPress versions and PHP versions before upgrading a site. Saves me time. Thanks! Easy worth 5-stars.

ecollart ❄️1️⃣ 7, 2022

Hello, I like the concept of using a specific page and would use your plugin if it can also display PHP version supported by the plugins. It is an info you can find for individual plugin in WordPress.org repository but would be nice to have that for all plugins at once ! Eric Collart

Read all 8 reviews

Contributors & Developers

“Plugin Compatibility Checker” is open source software. The following people have contributed to this plugin.

compatshield

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Plugin Compatibility Checker