Freemium — free Lite version (13 modules, no account required) plus paid Pro plans licensed by site count: Starter (1 site) from $9.99/mo, Studio (5 sites) from $24.99/mo, Growth (25 sites) from $89.99/mo, Agency (unlimited sites) from $169.99/mo, each with annual and 3-year discounts., from $69.89
WP Health Inspector is a diagnostic and troubleshooting plugin for WordPress sites, built to help developers, agencies, and site owners quickly identify what broke a site and why. It operates in read-only mode, scanning the PHP error log, database, cron jobs, and WordPress environment to correlate errors with the plugin updates or configuration changes that likely caused them. The free Lite version, distributed via WordPress.org, ships with 13 diagnostic modules including an Error Log & Error Map, a "What Changed?" timeline that links errors to recent plugin updates, an Autoload Governor for database bloat, a Database Health Inspector, a Cron Inspector, a Time Bomb Detector for SSL/PHP end-of-life warnings, an Asset Inspector, server/PHP environment profiling, a Plugin Abandonment Radar, and a Mail Health Inspector with SPF/DKIM/DNS checks. The paid Pro version adds root cause analysis, pre-update "blast radius" impact scoring, a conflict detector for hooks and assets, a request profiler, external dependency monitoring, performance baselines, Core Web Vitals estimation, and a security audit module, for 23 modules total. Pro plans are licensed by number of managed sites, from a single-site Starter plan up to an unlimited-site Agency plan, making it a fit for freelancers and WordPress agencies as well as individual site owners. It requires WordPress 6.0+ and PHP 8.0+ and is designed to run alongside common caching and security plugins.
Key Features
Error Log & Error Map — Reads the PHP error log and groups errors by severity to show what's actively breaking the site.
What Changed? Timeline — Correlates errors with recent plugin updates to trace which update caused the problem.
Database Health Inspector — Scans the WordPress database for bloat, orphaned data, and health issues, including an Autoload Governor for autoloaded option bloat.
Cron Inspector — Monitors WP-Cron background tasks to catch failed or stuck scheduled jobs.
Time Bomb Detector — Flags upcoming SSL certificate and PHP version end-of-life dates before they cause downtime.
Root Cause Analysis (Pro) — Pro-tier module that cross-correlates findings and pre-update blast-radius scoring to pinpoint the plugin responsible for a regression.
Pros & Cons
Pros
Free Lite version with 13 diagnostic modules and no account or credit card required
Read-only operation that scans a site without modifying data or settings
Correlates PHP errors and site issues directly to the plugin update that caused them
Site-count-based Pro pricing scales from a single site up to unlimited sites for agencies
Cons
Pro pricing is billed per number of managed sites, which can add up for agencies with many clients
As a WordPress-only plugin, it has no equivalent coverage for non-WordPress stacks
The site discloses limited company background beyond a single-maintainer 'Hire Me' page