Name: WordPress web font formats and the Core Web Vitals (October 2026) - The State of Web Vitals
Creator: Arjen Karel

94.7% of WordPress sites use WOFF2 fonts web font format, and 69% of those sites have a good LCP, against 70% of all WordPress sites.

The State of Web Vitals · October 2026 · WordPress: 63,295 crawled sites · 60,855 with all devices field data · 61,498 sites with web font formatBy Arjen Karel · corewebvitals.io/state-of-cwv

1

LCP pass rate

Sites with WOFF2 fonts web font format have a good LCP most often: 69%, against 70% of all WordPress sites. Sites with other font formats font formats have it least often, at 63%.

SitesGood, needs improvement, poor LCPMedian

All WordPress sites60,85570%1.9s

WOFF2 (Brotli-compressed) 94.7%56,00169%2.0s

OpenType (OTF) 1.6%96568%2.0s

WOFF (Legacy zlib) 36.6%21,71267%2.0s

TrueType (TTF) 18.3%10,88465%2.1s

Other font formats 1.1%64663%2.2s

GoodNeeds improvementPoorSites: with Chrome field data

The State of Web Vitals · October 2026 · WordPress: 63,295 crawled sites · 60,855 with all devices field data · 61,498 sites with web font formatBy Arjen Karel · corewebvitals.io/state-of-cwv

2

Web font format usage

WOFF2 fonts is the most used: 94.7% of WordPress sites.

Sites using each option (sites can use more than one) 61,498 sites

WOFF2 (Brotli-compressed) 94.7% WOFF (Legacy zlib) 36.6% TrueType (TTF) 18.3%

WOFF2 (Brotli-compressed) 94.7% WOFF (Legacy zlib) 36.6% TrueType (TTF) 18.3% OpenType (OTF) 1.6% Other font formats 1.1%

The State of Web Vitals · October 2026 · WordPress: 63,295 crawled sites · 60,855 with all devices field data · 61,498 sites with web font formatBy Arjen Karel · corewebvitals.io/state-of-cwv

3

LCP phase breakdown by web font format

Across the four LCP sub-parts in Chrome's field data, the largest gap between WOFF2 fonts and other font formats sits in time to first byte (TTFB): 1146 ms median for WOFF2 fonts against 1302 ms for other font formats. Overall median field LCP is 2.0s for WOFF2 fonts (TTFB 1146 ms, load delay 347 ms, load duration 167 ms, render delay 238 ms) versus 2.2s for other font formats.

Median LCP phase breakdown (Chrome field p75) Load delay Median LCP

WordPress sites with web font format 42,5041134 ms343 ms236 ms343 mslab 343 ms1.9s

Other font formats 4831302 ms347 ms251 ms347 mslab 347 ms2.2s

WOFF2 (Brotli-compressed) 40,2741146 ms347 ms238 ms347 mslab 347 ms2.0s

OpenType (OTF) 7271114 ms361 ms234 ms361 mslab 361 ms2.0s

WOFF (Legacy zlib) 15,7231171 ms374 ms244 ms374 mslab 374 ms2.0s

TrueType (TTF) 7,9541210 ms377 ms247 ms377 mslab 377 ms2.1s

TTFB Resource load delay Resource load time Element render delay

The State of Web Vitals · October 2026 · WordPress: 63,295 crawled sites · 60,855 with all devices field data · 61,498 sites with web font formatBy Arjen Karel · corewebvitals.io/state-of-cwv

4

Web font format per framework

jQuery sets the web font format to WOFF2 fonts on 96% of its sites, and 69% of jQuery sites have a good LCP, against 70% of all sites.

FrameworkWeb font format on its sitesGood LCP

WordPress sites with web font format 61,498 sitesWOFF2 (Brotli-compressed) 95%WOFF (Legacy zlib) 37%TrueType (TTF) 18%70%

Alpine 364 sitesWOFF2 (Brotli-compressed) 91%WOFF (Legacy zlib) 21%TrueType (TTF) 13%80%

jQuery 58,860 sitesWOFF2 (Brotli-compressed) 96%WOFF (Legacy zlib) 37%TrueType (TTF) 19%69%

Vue 4,738 sitesWOFF2 (Brotli-compressed) 93%WOFF (Legacy zlib) 37%TrueType (TTF) 25%68%

React 2,200 sitesWOFF2 (Brotli-compressed) 94%WOFF (Legacy zlib) 42%TrueType (TTF) 21%61%

WOFF2 (Brotli-compressed) WOFF (Legacy zlib) TrueType (TTF) OpenType (OTF) Other font formats

The State of Web Vitals · October 2026 · WordPress: 63,295 crawled sites · 60,855 with all devices field data · 61,498 sites with web font formatBy Arjen Karel · corewebvitals.io/state-of-cwv

5

Web font format or the framework

Does the framework explain the web font format difference?

Almost every site with WOFF2 fonts web font format is a jQuery site, and almost every jQuery site has WOFF2 fonts web font format, so the data can't tell WOFF2 fonts web font format and jQuery apart. On Vue, 67% of sites with WOFF2 fonts web font format have a good LCP, against 67% of Vue sites with legacy WOFF fonts. Within Vue, sites with WOFF2 fonts and legacy WOFF fonts have a good LCP about equally often. On React, 60% of sites with WOFF2 fonts web font format have a good LCP, against 58% of React sites with legacy WOFF fonts. Within React, sites with WOFF2 fonts and legacy WOFF fonts have a good LCP about equally often.

Why WOFF2 replaces legacy WOFF, TTF, and OTF across all modern browsers

WOFF2 uses custom Brotli preprocessing to compress font glyphs ~30% smaller than legacy WOFF and up to 50%+ smaller than raw TTF or OTF files, and has been supported by every major browser since 2016. Across 58,232 font-using sites (94.7%) serving WOFF2, good LCP reaches 69% (2.0s median). Sites still serving legacy WOFF (36.6%, 22,534) drop to 67% good LCP (2.0s median), and sites serving raw TTF (18.3%, 11,262) drop to 65% good LCP (2.1s median).

The State of Web Vitals · October 2026 · WordPress: 63,295 crawled sites · 60,855 with all devices field data · 61,498 sites with web font formatBy Arjen Karel · corewebvitals.io/state-of-cwv

6

Understanding web font formats

Convert legacy theme icon fonts (Font Awesome, Dashicons replacements, custom theme fonts) to WOFF2-only @font-face declarations and remove .ttf and .woff fallbacks. On WordPress, 94.7% of sites serve WOFF2 (69% good LCP) while 36.6% still download legacy WOFF (67%) and 18.3% download raw TTF (65%).

Go fix it Self-host Google Fonts → Responsive font loading strategy →

The State of Web Vitals · October 2026 · WordPress: 63,295 crawled sites · 60,855 with all devices field data · 61,498 sites with web font formatBy Arjen Karel · corewebvitals.io/state-of-cwv