Calculate and test Cumulative Layout Shift

CLS (Cumulative Layout Shift) test

CLS Test is the free online calculator and visualization tool for CLS ✅ Type in the address bar the url you want to get the CLS score from and let CLS Test calculate and visualize the CLS score ✅, a lightweight interchange format ✅.

Beta: continuous CLS score check for you whole website. We'll notify you automatically if pages have a high CLS score. Are you interested?
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