The State of Web Vitals

CLS Deep Dive

Q1 2026 (archived) | 0 sites
All Desktop Phone
—
CLS (p75)
—
Passing CLS
—
Shifts at p75

Cumulative Layout Shift across 100k sites: what drives shifts (iframes, third-party, font loading, shadow DOM) and which prevention patterns actually work (aspect-ratio CSS, sized images, font preloading).

CLS Distribution

0
p10
0
p25
0
p50
0
p75
0
p90
0
p99
0.1
0.25

CLS —. p75 —. p99 —. 0.0% pass.

/core-web-vitals/cumulative-layout-shift →

CLS Pass Rates

CLS
0%
Good Needs Improvement Poor

CLS passes on 0.0% of sites. 0.0% need improvement, 0.0% fail.