Core Web Vitals checker
The Core Web Vitals checker reports LCP, INP, and CLS for a URL, showing lab Lighthouse results and real-user Chrome UX Report data side by side, each labeled by source.
- Free, no sign-up
- Results in seconds
- Checker · 35 free tools
Lab tests typically take 20–40 seconds. Field metrics come from Chrome UX Report when enough real-user data exists.
This checks one page. The same problem usually repeats on every page built from the same template. Plans start at $14.99 a month.
How to use the core web vitals checker
- 1
Paste an address
A full URL or just a domain. We add https:// when it is missing.
- 2
We fetch it live
Our server requests the page now, the way a crawler would, and records what came back.
- 3
Read the evidence
Every result shows the value we read, so you can see why it passed or failed.
- 4
Fix and check again
Change the page, run it once more, and ship when the second run agrees.
What this does not measure
We would rather say what a tool cannot see than let a clean result mislead you.
- A lab run is synthetic. It measures one load of one URL on Google's hardware, and your visitors are not on that hardware.
- Field data is a 28-day rolling summary and may be absent entirely for a low-traffic URL. When it is missing the tool says so rather than showing a zero.
- Neither number is a ranking factor on its own. Core Web Vitals are a tiebreaker, not a score for the page.
Want the full picture?
This tool answers one question. A full audit runs every check on a page, scores it, and gives you a short list of what to fix first.
Questions about the core web vitals checker
More in the guides.