LCP CheckerPreliminary technical test
Find typical LCP brakes: slow server response, blocking CSS, heavy resources, and lack of prioritization of important images.
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 for landing pages, category pages, shops and hero-heavy templates.
Results
Technical pre-checking of a URL. For a crawl over many URLs, use the premium audit.
Findings
Detailed hit
Practical example · for illustration
Examining a late-loaded hero image
Example: The most important image in the first viewing area is integrated with loading="lazy". Determine the actual LCP element in DevTools. If it is this image, remove lazy loading for it, deliver suitable image dimensions and set fetchpriority="high" if necessary.
What does not prove the result
Not every hero image is the LCP element. Without browser rendering, the pre-check can neither determine this element nor measure an LCP value in seconds.
Deepen with PageSpeed Insights and available field data · Google's Definition of Core Web Vitals
What the LCP 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 LCP Checker
What particularly affects LCP?
Often, TTFB, critical CSS, hero images, fonts and JavaScript are the main technical causes.
Can the tool see the real LCP element?
The tool recognizes technical risk signals from HTML and resources. The real LCP element should also be checked in the browser.
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.