How slow is it, really?
Your real Google PageSpeed score and Core Web Vitals, run live and shown here, no tab-hopping. Then the part no other speed tool gives you: which of your specific numbers a migration would fix, which it would not, and when the honest answer is that speed is not your problem.
Live from Google PageSpeed Insights. Takes 10–30 seconds.
A note on the number. PageSpeed moves a few points between runs. It is a lab test on a simulated device, so treat the band as the signal, not the digit. If you would rather use the tools directly, PageSpeed Insights, WebPageTest and GTmetrix all run the same kinds of test.
03 / Questions
Speed questions, answered.
Including where the number comes from, and what it does not tell you.
01Where does this score come from?
Straight from Google’s PageSpeed Insights API, called live from your browser when you press the button, the same engine behind pagespeed.web.dev, returning the same numbers. Nothing is estimated or cached on our side. If Google’s shared free quota is momentarily exhausted the page says so and links you to run it directly, rather than showing you a number we made up.
02What is a good Core Web Vitals score?
The thresholds Google publishes are LCP at or under 2.5 seconds, INP at or under 200 milliseconds, and CLS at or under 0.1, measured at the 75th percentile of real visits, not on your own fast laptop. The 0–100 PageSpeed number is a lab summary of those and related metrics; the band matters, a five-point movement does not.
03Why is my mobile score so much worse than desktop?
The mobile test simulates a mid-range phone on a throttled connection, which is closer to how most people actually arrive. Desktop runs on a fast profile. A large gap is normal, but a mobile score in the 20s and 30s usually means the page ships far more JavaScript than its content needs, which is exactly what a builder runtime does.
04Will migrating my site improve Core Web Vitals?
LCP and INP usually improve a lot, because both are dominated by how much script runs before your content appears, and a rebuilt site stops shipping an editor to visitors. CLS improves if the new build reserves space properly and stays that way only if whoever edits it keeps the discipline. TTFB depends entirely on where you land, static hosting on a CDN is close to free, a mis-configured shared host is not.
05Is site speed a Google ranking factor?
Core Web Vitals are part of Google’s page experience signals, but they are a tiebreaker rather than a headline factor, relevant content on a slow page still outranks thin content on a fast one. The stronger argument for fixing speed is the one that shows up in your own analytics: people leave pages that take several seconds to become usable, and that happens whether or not Google is counting.