speedlify2

Lighthouse lab metrics, Axe, and Chrome UX Report field data for a list of sites recorded and compared over time.

Charts Measurement runs Embed a score

a11yproject.com

https://www.a11yproject.com/

99 100 100 100 AXE CWV

Ranks Overall #204 Built Awesome #165

Data from Sep 6, 2026, 7:03 PM UTC old Measured once a week · 3 runs since Aug 21, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Wayback Machine

Stack

Netlify Hosted by Netlify

Lighthouse Scores

99
Performance
no change
100
Accessibility
no change
100
Best Practices
no change
100
SEO
no change

Metrics Lighthouse, mobile Chrome UX Report

Core Web Vitals: passing 2 of 3 assessed from real Chrome users.

Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-08-08 → 2026-09-04), url-level.

Metric Lab Lighthouse Field Chrome UX Report
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 2.05 s good ↑ +55 ms (+2.8%) 1.99 s – 2.13 s 1.71 s good 94.9% 5.1% 0%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a
CLS CWV Cumulative Layout Shift 0.017 good → no change 0.012 – 0.017 0.010 good 93.4% 6.6% 0%
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms n/a
FCP First Contentful Paint 924 ms good ↓ -20 ms (-2.1%) 924 ms – 944 ms 1.49 s good 85.8% 13.1% 1.1%
Speed Index 924 ms good ↓ -20 ms (-2.1%) 924 ms – 944 ms n/a
TTFB Time to First Byte 624 ms good ↓ -20 ms (-3.1%) 624 ms – 644 ms 1.03 s needs work 64.2% 29.2% 6.6%

LCP Subparts lab observed, unthrottled

The subparts attribute LCP to your server, resource discovery, download, or rendering. Note that the Lab LCP shown above is throttled.

element render delay 129 ms
time to first byte 29 ms

Lab LCP vs Field LCP Chrome UX Report

Lab 2.05 s
Field p75 1.71 s

The lab LCP is 1.2× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 266 kB ↓ -143 B (-0.1%) 266 kB – 266 kB
Requests 15 → no change 15 – 15
Third-party Weight 0 B → no change 0 B – 0 B
Third-party CPU 0 ms → no change 0 ms – 0 ms
Unused JS 0 B → no change 0 B – 0 B
Unused CSS 11.3 kB ↓ -76 B (-0.7%) 11.3 kB – 11.4 kB

By resource type

  • image 73.1% 194 kB · 5 req
  • font 16.5% 43.8 kB · 2 req
  • stylesheet 5.2% 14.0 kB · 1 req
  • document 3.3% 8.8 kB · 1 req
  • other 1.1% 2.9 kB · 3 req
  • script 0.8% 2.2 kB · 3 req

Page health

Metric Value Change / range Trend
Main Thread Work 361 ms ↑ +15 ms (+4.2%) 346 ms – 361 ms
Long Tasks 0 → no change 0 – 0
DOM Elements 250 → no change 250 – 250
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 0 → no change 0 – 0
A11y Failures 0 → no change 0 – 0
A11y Failing Nodes 0 → no change 0 – 0

Main thread work

other 173 ms
style layout 113 ms
paint composite render 41 ms
script evaluation 17 ms
parse HTML 14 ms
script parse compile 3 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 597 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2

Measurement log

Field history 25 weeks

Weekly p75 from the CrUX History API, backfilled in a single request.

Week ending LCPINPCLSFCPTTFB
2026-09-05 1.71 s 0.010 1.52 s 940 ms
2026-08-29 1.57 s 98 ms 0 1.39 s 937 ms
2026-08-22 1.53 s 0 1.29 s 813 ms
2026-08-15 1.36 s 85 ms 0 1.15 s 757 ms
2026-08-08 1.41 s 90 ms 0 1.20 s 806 ms
2026-08-01 1.36 s 0 1.15 s 786 ms
2026-07-25 1.42 s 89 ms 0 1.15 s 796 ms
2026-07-18 1.55 s 98 ms 0 1.35 s 848 ms
2026-07-11 1.25 s 0 1.01 s 687 ms
2026-07-04 1.28 s 0 973 ms 615 ms
2026-06-27 1.25 s 99 ms 0 916 ms 514 ms
2026-06-20 1.23 s 96 ms 0 916 ms 526 ms

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Sep 6, 2026, 7:03 PM UTC 99 2.05 s 0.017 0 ms 266 kB 3/3 ±1 2,337 -6% 23.9s Wayback
Aug 30, 2026, 6:07 PM UTC 99 1.99 s 0.017 0 ms 266 kB 3/3 ±0 2,409 -3% 23.5s Wayback
Aug 21, 2026, 9:38 AM UTC 99 2.13 s 0.012 0 ms 266 kB 3/3 ±1 2,418 -3% 23s Wayback

Embed this score

Use this web component to show a11yproject.com's scores on any website, updated whenever this instance re-measures. Don’t forget to bundle the speedlify2-score.js component code into your site!

<speedlify2-score speedlify-url="https://www.speedlify.dev/" url="https://www.a11yproject.com/"></speedlify2-score>