# Core Web Vitals checker

> Free Core Web Vitals checker. Test LCP, INP, and CLS for any URL with lab Lighthouse data and field Chrome UX Report data from PageSpeed Insights. No sign-up.

Canonical: https://crawlwise.site/tools/vitals

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.

[Crawl the whole site](https://crawlwise.site/plans) [Run a full audit](https://crawlwise.site/#audit-url)

## 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.

[Run a free audit](https://crawlwise.site/#audit-url)

## Questions about the core web vitals checker

More in the [guides](https://crawlwise.site/guides).

### What does the Core Web Vitals checker do?

Lab Lighthouse and field Chrome UX Report data from Google PageSpeed Insights.

### Do I need a Crawlwise account to use Core Web Vitals checker?

No. Every tool in the free toolkit runs without sign-up, card, or email. A full site audit and saved history require an account and credits.

### What can Core Web Vitals checker not tell me?

A lab run is synthetic. It measures one load of one URL on Google's hardware, and your visitors are not on that hardware.

### How is this different from a paid SEO suite?

Crawlwise shows the evidence behind each result and prices work in credits. Suites bundle backlinks and ads research; we focus on measurable on-page health and crawler access.

### Can I run the same check on my whole site?

The free tool answers one URL or one question. Add a site in Crawlwise to crawl many pages, export reports, and track changes over time on paid plans.

### Will fixing what the tool flags improve rankings?

Nothing outside Google can promise rankings. Fixing real technical issues removes friction for crawlers and readers; it is necessary but not sufficient for visibility.

## Keep reading

[Blog](https://crawlwise.site/blog) [All guides](https://crawlwise.site/guides)