Check Your WordPress Site Speed
Run a free Lighthouse audit on your WordPress site and export the full JSON report. Use it with ChatGPT, Claude, or Cursor to get plugin recommendations and exact code changes for better Core Web Vitals.
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Loading...Common performance issues on WordPress sites
These are the issues most frequently found in WordPress Lighthouse audits. Your report will tell you exactly which ones apply to your site.
Render-blocking scripts and styles
WordPress plugins often enqueue scripts on every page load. Eliminating render-blocking resources is typically the highest-savings fix for WordPress sites.
No image optimization
WordPress sites without an image optimization plugin (like Imagify or Smush) serve large uncompressed images — a common cause of poor LCP scores.
No page caching
Without caching, WordPress generates pages dynamically on every request. Server response time (TTFB) above 600ms will delay every other metric.
Excessive plugins adding JS/CSS
Each plugin that adds scripts and styles to every page increases Total Blocking Time (TBT) and page weight, even if the plugin is only used on specific pages.
Pro tip: The Lighthouse report's stackPacks section includes WordPress-specific hints for every failing audit — it may recommend specific plugins like WP Rocket, Autoptimize, or Asset CleanUp that directly address your issues.
Want a detailed tutorial? Read our step-by-step performance fix guide →
Frequently asked questions
How do I check my WordPress site speed?
Enter your WordPress URL at speedexporter.com and run a free Lighthouse audit. The report includes WordPress-specific hints from Lighthouse StackPacks — it will recommend specific plugins (WP Rocket, Imagify, Asset CleanUp) if they address your failing audits.
What causes poor Core Web Vitals on WordPress?
The four most common causes are: (1) render-blocking plugin scripts loaded on every page; (2) unoptimized images without WebP conversion or explicit dimensions; (3) slow server response time from missing page caching; and (4) unused CSS from themes and plugins inflating page weight. Your Lighthouse report identifies exactly which apply to your site.
How do I fix Core Web Vitals on WordPress?
Start with TTFB — install WP Rocket or W3 Total Cache for page caching. Then fix images with Imagify (auto-WebP). Use Asset CleanUp to stop plugins loading scripts on pages that do not need them. Export your full Lighthouse JSON from PageSpeed Exporter and ask Claude or ChatGPT for plugin-specific instructions tailored to your failing audits.