PageSpeed & Core Web Vitals Checker
Run Google PageSpeed Insights and summarize performance, accessibility, SEO, and key web metrics. This live check sends only the URL or domain you enter to ToolkitPoint’s server and the named authoritative service.
How to use PageSpeed & Core Web Vitals Checker
- Enter the page address in "Public page URL".
- Pick "Test device": Mobile or Desktop, which changes how the test simulates the visit.
- Press "Run live check" and wait; the test can take up to a minute and a half because it runs on a remote service.
- Read the four score boxes (Performance, Accessibility, Best Practices, SEO) and the Core Web Vitals metrics such as LCP, CLS, TBT and Speed Index.
- Use the "Open in Google PageSpeed Insights" link to see the full audit list for the same URL and device.
Worked example
Enter a public homepage, keep Mobile and press Run live check. Four boxes appear, each showing a whole number from 0 to 100, followed by the LCP, CLS, TBT and Speed Index values in the units the service reports. Changing Test device to Desktop and running again usually raises performance, but the exact numbers depend on the live page.
When to use this tool
- Comparing mobile and desktop performance scores after an image optimisation pass.
- Recording LCP and CLS before and after a theme change.
- Sharing a quick lab check with a developer alongside the full report link.
Important limitations
Lighthouse lab simulations run via Google PageSpeed Insights API from standardized testing servers. Lab metrics measure cold-cache synthetic scenarios, while real-user Field Data (CrUX) aggregates 28 days of Chrome user experiences.
Frequently asked questions
Where do the numbers come from?
From Google's PageSpeed Insights service, which runs a Lighthouse lab test on their servers. ToolkitPoint does not measure your page itself, so the result depends on that service being available.
Why do scores change between runs?
Lab tests vary with server load, network timing and page content such as ads or A/B tests. A difference of several points on the same page is normal, so run it more than once.
Are these lab figures the same as real user data?
No. They are simulated conditions, and field data from real visitors can differ a lot. The Interaction to Next Paint value is captured in the response but the page shows the lab metrics listed.
Why did the check fail?
Common causes are a page that blocks the tester, a very slow site, a missing or exhausted API quota, or the ToolkitPoint server being unreachable. The message beneath the button says which problem it saw.
What are the green, amber and red bands?
Scores of 90 and above are green, 50 to 89 amber and below 50 red, following the usual Lighthouse convention. The metric tips list targets such as 2.5 seconds for LCP and 0.1 for CLS.