The State of Web Vitals

Explore 189,915 websites

Pivot to any metric, technology, or signal in the dataset. Charts pick themselves. Prose writes itself.

Field data PhoneDesktopAll Scope All sites Q2 2026 edition · Phone field outcomes
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Hot questions this edition

Preload, fetchpriority — do the hints help?

LCP by priority hint on the element

Which CMS is fastest?

WordPress, Shopify, Wix, Squarespace ranked

What blocks the main thread?

Top scripts in long animation frames

Are AVIF sites faster?

JPEG, WebP, AVIF, JXL ranked by LCP

Where do the LCP milliseconds go?

TTFB, load delay, load time, render delay

How big is the JavaScript tax on INP?

Script count and weight vs INP

How much shipped JavaScript even runs?

Used vs unused script bytes

Which CDNs hit the lowest TTFB?

Cloudflare, Akamai, Fastly, CloudFront

INP cost of analytics scripts

GA4, Plausible, Fathom, Matomo

DOM size and CLS

How DOM growth correlates with shifts

Or browse the data

120 signals across 13 sections. Use the tree on the left or the search box.

  • Headline metrics 5 signals LCP, INP, CLS…
  • Tech stack 3 signals CDN (7), CMS (12), Frameworks (11)…
  • Third parties 27 signals JS libraries (25), Analytics (20), CMS (17)…
  • Main thread 1 signals Top INP blockers (25)…
  • Page resources 36 signals Bytes by resource type, Compression mix, Cookies per site…
  • CDN & Delivery 12 signals Cache strategy mix, Cacheable responses, Connection hints…
  • Speculation rules 2 signals Speculation eagerness, Speculation posture…
  • INP 6 signals Blocking frame breakdown, CSS hints, INP phase breakdown…
  • Synthetic (lab) 4 signals Document lifecycle (lab), Lab paint timeline, Main-thread CPU (lab)…
  • CLS 5 signals Largest single shift, Layout shift count, Shift concentration…
  • LCP Timing 1 signals LCP phase breakdown…
  • LCP Image 8 signals LCP discovery, LCP element type, LCP image format…
  • Tech stack 10 signals Ad networks on page, Analytics on page, CMS…

Chrome field data from 189,915 sites, representing millions of real page loads, Q2 2026 edition. How we measured.

JSON file lookups (4)
20260625/meta.json 0.03 ms
20260625/types.json 0.58 ms
20260625/loaf-scripts.json 0.37 ms
20260625/menu.json 0.13 ms