Core Web Vitals CheckerPreliminary technical test
Check a URL for core web hospital technical risks and see if LCP, INP or CLS should be deepened first.
Technical pre-testing without browser rendering. Own scores of 0–100 mean: higher = less recognized risk signals. No measured LCP, INP or CLS values. TTFB is measured on the server side.
Ideal as a fast start before a crawl over several templates and URLs.
Results
Technical pre-checking of a URL. For a crawl over many URLs, use the premium audit.
Findings
Detailed hit
Practical example · for illustration
Connecting risk signals with a browser measurement
Example: Images without dimensions and several synchronous scripts stand out. In the browser, check first whether images actually trigger layout shifts and whether the scripts block the main thread for important clicks. First change the observed bottleneck, then measure the same sequence again.
What does not prove the result
The three pre-test values are own 0–100 estimates. LCP and INP are real time measures, CLS is a measure of layout shifts; the tool does not perform these measurements.
Deepen with PageSpeed Insights and available field data · Google's Definition of Core Web Vitals
What the Core Web Vitals Checker evaluated
The pre-check evaluates the retrieved HTML and a limited sample of linked resources. It does not execute JavaScript and does not simulate user interactions. Findings are concrete occasions for an examination in the browser; an inconspicuous result does not exclude performance problems.
From a single check to Core Web Vitals Audit
The audit examines multiple URLs and helps to find recurring technical patterns in templates. This way you can see if a change affects several pages and where you can start the implementation.
Questions about Core Web Vitals Checker
Replacing the Checker Lighthouse?
No. It provides a server-side pre-examination and prioritizes technical risk areas. Lighthouse and field data remain important.
Why is there a separate premium audit?
The audit examines several URLs and makes template patterns visible. You can see the respective test scope before the start.
Why are there standalone tools in addition to the audit?
Individual tools help with a specific URL or technical problem. The audit compares these signals across multiple URLs and shows recurring patterns.
Is the individual check free of charge?
Yes. The standalone tools check a single URL. For larger crawls, complete tables and CSV export, the premium audit is planned.