Free tool

Core Web Vitals check

This Core Web Vitals check fetches one public page and reports Lexicon's own speed hints: how long the HTML took to download, how large that HTML was, images missing width and height, and scripts in the head that block parsing. These are guidelines from a single fetch, not Google's field or lab Core Web Vitals. The check does not measure LCP, INP, or CLS, and it does not estimate traffic.

One public page. No account. 10 checks an hour from one network, and 3 an hour for the same site. The result is not indexed. This is not a lab score or field-data score.

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