Free Tool
Core Web Vitals / Speed Checker
Paste a page URL and get a live mobile PageSpeed Insights run back: performance score, Largest Contentful Paint, Cumulative Layout Shift, and Interaction to Next Paint. The exact metrics Google uses to judge page experience.
How It Works
Three Steps, Done
01
Paste a URL
Any public page: your homepage, a blog post, a Shopify product page.
02
Run the check
It queries Google PageSpeed Insights directly and waits for a real Lighthouse run.
03
Read the vitals
Performance score plus LCP, CLS and INP/TBT displayed together.
Why It Matters
More Than Just Convenient
- Core Web Vitals are a confirmed Google ranking signal, so this shows you exactly where a page stands.
- Mobile-first: tests the same mobile experience Google primarily indexes and ranks on.
- Quick enough to run before/after a fix to confirm an optimization actually moved the numbers.
FAQ
Common Questions
It calls Google's PageSpeed Insights API under the hood, which requires a free API key per site to avoid rate limits.
Same underlying engine (Lighthouse) as PageSpeed Insights. It reports Google's own field-adjacent lab metrics, the ones tied to actual ranking signals.
Lighthouse runs are lab tests with some natural variance between runs (network, server load). Run it 2-3 times for a stable read.
Need This Done For You?
Let's Talk About Your Project
If this tool solved a small piece of a bigger problem, I can help with the rest: WordPress and Shopify development, speed optimization, and ongoing support.