How to Audit Core Web Vitals in 15 Minutes (or Less)
A step-by-step workflow using free tools and a simple checklist to identify LCP, FID, and CLS issues fast.
Core Web Vitals aren't going away, but you don't need a dedicated speed team to diagnose them. I've refined a process that takes me under 15 minutes per site using just Chrome DevTools, PageSpeed Insights, and a structured checklist.
Start with the URL inspection in Search Console. That gives you a real-user sample. Then open DevTools — the Performance tab shows LCP candidates; the Network tab helps you find render-blocking resources. I always check the 'Issues' tab too; it often surfaces missing dimensions or passive listeners.
Next, run PageSpeed Insights on mobile and desktop. Ignore the score — look at the actual metrics and the 'Opportunities' section. If LCP is over 2.5s, your hero image or font is likely the culprit. For CLS, check for layout shifts caused by ads or dynamic content without reserved space.
Last, use my Core Web Vitals Audit Template (free with any purchase) to log findings and prioritize fixes. Most issues fall into three buckets: images, fonts, or third-party scripts. Fix those and you're 80% of the way there.