Best compatibility checker plugins for WordPress
The most popular compatibility checker plugins for WordPress in November 2026, in WordPress.org’s own popular order, which follows active installs. CatCode PHP Upgrade Check for WooCommerce leads with fewer than 10 active installs, ahead of Korizo (fewer than 10) and Tidyleaf Upgrade Scanner for PHP (fewer than 10). All 5 plugins tagged “compatibility checker” are below, with figures from WordPress.org that update every day.
Installs aren’t everything: a recent release, a “Tested up to” that matches the current WordPress, and support threads that get resolved show a plugin is looked after. Open any plugin for its downloads, rank history and alternatives.
Research this niche or see all plugins.
Top 5 compatibility checker plugins
- 1.
CatCode PHP Upgrade Check for WooCommerceThe most installed compatibility checker plugin, with fewer than 10 active installs. No reviews yet, updated 4 days ago.
- 2.
KorizoFewer than 10 active installs. No reviews yet, updated 5 months ago. Tested only up to WordPress 6.9.11.
- 3.
Tidyleaf Upgrade Scanner for PHPFewer than 10 active installs. No reviews yet, updated 1 week ago.
- 4.
UpgravoFewer than 10 active installs. No reviews yet, updated 6 days ago.
- 5.
LeaplensFewer than 10 active installs. No reviews yet, updated 4 days ago.
All 5 plugins tagged “compatibility checker”
CatCode PHP Upgrade Check for WooCommerce
#50,305by CatCode4 days ago
Before your host moves the shop to PHP 8.3, 8.4 or 8.5, find the plugins and themes that would break — with the file, the line and the fix.
- Installs
- <10
- Rating
- –
- Downloads
- 71/day
Korizo
#57,292by wpplugins20265 months ago
Get a health score (A+ to F) for every installed plugin. See which plugins are safe, risky, or should be replaced — in plain English.
- Installs
- <10
- Rating
- –
- Downloads
- 0/day
Tidyleaf Upgrade Scanner for PHP
Up in the last 7 days:10,397#62,640by tidyleaf8 days ago
Check plugins and themes for PHP 8.4 compatibility before you upgrade. Runs on any host, no exec(), with file and line for every issue.
- Installs
- <10
- Rating
- –
- Downloads
- 33/day
Upgravo
Down in the last 7 days:14,675#65,984by Nicolás Alejandro Salinas6 days ago
Check PHP compatibility before you upgrade: scans plugins and theme on your own server and tells you what will break on PHP 8.x. No external service.
- Installs
- <10
- Rating
- –
- Downloads
- 27/day
Leaplens
#70,043by maksymkotenko4 days ago
Before you switch PHP, scan every plugin and theme for PHP 8.5 problems and get one verdict each: update, replace, report or keep.
- Installs
- <10
- Rating
- –
- Downloads
- 63/day