The State of Web Vitals

Image CDNs impact

Performance impact by image_cdn provider.

Field data PhoneDesktopAll Scope All sites Q2 2026 edition · All devices field outcomes
Metric LCP INP CLS
1

At a glance the headline numbers for Image CDNs impact

Performance impact by image_cdn provider.

9
Providers ranked
After min-sites filter
27,247
Sites in sample
Combined across all items
1.7s
Best LCP (p75)
Fastly Image Optimizer
The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
2

The ranking sorted by LCP at p75, fastest first

# Provider LCP p75 Passing Sites
1 Fastly Image Optimizer 1.7s 88.3%
1,139
2 Imgix 2.0s 86.5%
805
3 Uploadcare 2.0s 88.4%
92
4 Bunny Image Optimizer 2.2s 82.2%
17,146
5 Thumbor 2.2s 84.2%
188
6 Akamai Image Manager 2.2s 81.1%
7,230
7 Cloudinary 2.4s 79.1%
512
8 Sirv 2.5s 75.9%
57
9 ImageKit 3.1s 66.2%
78
The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
3

Passing LCP per provider which group passes the LCP most often

ProviderSitesPassing LCPp75
Uploadcare 0% 92 88% 2.0s
Fastly Image Optimizer 0.6% 1,139 88% 1.7s
imgix 0.4% 805 87% 2.0s
Thumbor 0.1% 188 84% 2.2s
Bunny Image Optimizer 9% 17,146 82% 2.2s
Akamai Image Manager 3.8% 7,230 81% 2.2s
Cloudinary 0.3% 512 79% 2.4s
Sirv 0% 57 76% 2.5s
ImageKit 0% 78 66% 3.1s
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good LCP (2.5s at p75) · one value per site

88% of Fastly Image Optimizer sites pass LCP. Cloudinary trails 9 points behind. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
4

All five vitals at once the whole category without toggling - cell is the pass rate, small number the p75

LCP
INP
CLS
FCP
TTFB
Bunny Image Optimizer 9%
822.2s
96113ms
860.05
771.7s
591.2s
Akamai Image Manager 3.8%
812.2s
96116ms
850.05
771.7s
571.2s
Fastly Image Optimizer 0.6%
881.7s
93118ms
880.02
911.2s
81720ms
imgix 0.4%
872.0s
91136ms
870.05
851.5s
75819ms
Cloudinary 0.3%
792.4s
76182ms
710.14
761.8s
591.1s
Thumbor 0.1%
842.2s
95133ms
600.21
841.6s
65963ms
Uploadcare 0%
882.0s
88154ms
860.06
871.4s
82704ms
ImageKit 0%
663.1s
84147ms
800.05
682.0s
501.2s
Sirv 0%
762.5s
96111ms
800.08
662.2s
431.5s
60%95%+ passing Cell: pass rate, small number = p75 · faded rows: under 100 sites

One row per provider, one column per vital - the cell is the share of sites passing, the small number the p75. No toggling needed to see where the category actually differs.

Fastly Image Optimizer leads on LCP: 88% of its sites pass. Cloudinary trails at 79%. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
Related signals Search (5) → Font services (4) → Personalization (5) → CDN (15) → Chrome field data from 189,915 sites, representing millions of real page loads · How we measured