The State of Web Vitals

Images & Media

Q1 2026 | Desktop | 55,913 sites
All Desktop Phone
—
Images per page (p75)
—
Dominant format
2
Iframes per page (p75)

Image format adoption, lazy loading patterns, responsive images, and iframe usage.

Lazy loading usage

Median LCP (sites using feature)
0
0.5s
1s
1.5s
2s
2.5s
3s
3.5s
4s
eager_btf1.4s46% of sites
lazy_btf1.4s22% of sites
bg1.4s19% of sites
eager_atf1.4s10% of sites
lazy_atf1.4s2% of sites
eager_btf
46%
1.4s
lazy_btf
22%
1.4s
bg
19%
1.4s
eager_atf
10%
1.4s
lazy_atf
2%
1.4s

Lazy loading usage. On the fleet: 46.4% eager_btf, 22.1% lazy_btf, 19.2% bg. 83.1% of sites use at least one eager_btf.

Lowest-share bucket: LCP 1.2s. Highest-share bucket: LCP 1.4s. r = +0.33.

fetchpriority adoption

Median LCP (sites using feature)
0
0.5s
1s
1.5s
2s
2.5s
3s
3.5s
4s
auto1.4s97% of sites
high1.6s2% of sites
low1.3s1% of sites
auto
97%
1.4s
high
2%
1.6s
low
1%
1.3s

fetchpriority adoption. On the fleet: 96.7% auto, 2.3% high, 1.0% low. 95.6% of sites use at least one auto.

Lowest-share bucket: LCP 1.3s. Highest-share bucket: LCP 1.4s. r = +0.43.

Image dimensions set

Median LCP (sites using feature)
0
0.5s
1s
1.5s
2s
2.5s
3s
3.5s
4s
has_none1.4s54% of sites
has_dimensions1.4s44% of sites
has_aspect_ratio1.4s1% of sites
has_none
54%
1.4s
has_dimensions
44%
1.4s
has_aspect_ratio
1%
1.4s

Image dimensions set. On the fleet: 54.2% has_none, 44.4% has_dimensions, 1.4% has_aspect_ratio. 79.3% of sites use at least one has_none.

Lowest-share bucket: LCP 1.3s. Highest-share bucket: LCP 1.4s. r = +0.29.

Iframes per page

0ms
p10
0ms
p25
0ms
p50
2ms
p75
3ms
p90
8ms
p99

Iframes per page 0ms. p75 2ms. p99 8ms.

Fastest bucket (0ms): LCP 1.3s. Slowest bucket (>p98): LCP 1.7s.

Iframe lazy loading

Median LCP (sites using feature)
0
0.5s
1s
1.5s
2s
2.5s
3s
3.5s
4s
default1.4s94% of sites
lazy1.6s6% of sites
default
94%
1.4s
lazy
6%
1.6s

Iframe lazy loading. On the fleet: 93.8% default, 6.2% lazy. 40.4% of sites use at least one default.

Lowest-share bucket: LCP 1.3s. Highest-share bucket: LCP 1.4s. r = +0.23.