TL;DR. Core Web Vitals — LCP ≤ 2.5s, INP ≤ 200ms, CLS ≤ 0.1 — are a Google ranking factor. Field data (CrUX, 28-day rolling real-user) beats lab data for this reason.
The Critical CSS Inlining Audit is the audit you reach for when you already suspect a problem in this dimension and need a fast, copy-paste-able fix list. It reuses the same chrome as every other jwatte.com tool — deep-links from the mega analyzers, AI-prompt export, CSV/PDF/HTML download — but the checks it runs are narrow and specific to the dimension described above.
Counts render-blocking tags, inlined