Web Almanac 2025: 48% mobile / 56% desktop origins pass all 3 CWV; LCP is the bottleneck
Created 2026-05-22
Claims (HTTP Archive Web Almanac 2025, July 2025 CrUX data):
- 48% of mobile origins and 56% of desktop origins pass all three CWV
- Per-metric mobile breakdown: 62% LCP good, 77% INP good, 81% CLS good
- Desktop is improving slowly (55% → 56% YoY); mobile improving faster (44% → 48%)
- More than half of the mobile web still fails CWV.
Source: Web Almanac 2025 — Performance chapter and SEO chapter (almanac.httparchive.org/en/2025/...)
Confidence: Verified.
LCP is the gating metric. When 62% pass LCP but 77% pass INP and 81% pass CLS, the metric to focus on is LCP. Most sites are losing CWV on the loading axis, not the interactivity or stability axes. See Reference: the 8 most common LCP killers — ranked by observed frequency for the diagnostic.
Referenced by (7)
- reference Web Almanac 2025: median mobile page weight crossed 2,559 KB in July 2025 (+7.8% YoY) relates-to
- reference Reference: the 8 most common LCP killers — ranked by observed frequency relates-to
- reference Reference: the 5 most common CLS killers — and the fixes relates-to
- reference Research brief: Page Speed as a Moat — why CWV separates the agencies from the freelancers (piece 9 of 15) relates-to
- reference June 2025 platform CWV pass rates (SEJ): Duda 83.63%, Shopify 75.22%, Wix 70.76%, Squarespace 67.66%, Drupal 59.07%, WordPress 43.44% relates-to
- reference Core Web Vitals is a tiebreaker-class Google ranking factor, not a heavy lever — independent studies (Perficient, AWR, Backlinko) corroborate relates-to
- reference Platform mobile CWV pass rates, November 2025 CrUX Tech Report (SEJ analysis, Dec 2025) relates-to