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Lighthouse lab metrics, Axe, and Chrome UX Report field data for a list of sites recorded and compared over time. Follow us on Mastodon or Bluesky.

Charts Compare Measurement runs Embed a score Open to Work

htmhell.dev

https://www.htmhell.dev/

99PERF 100A11Y 100BEST 100SEO !AXE ✓CWV

Ranks Overall #634 Built Awesome #476

Data from Oct 5, 2026, 8:32 AM UTC old Measured once a week · 7 runs since Aug 21, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Tame the Bots · Scoring Calculator · Wayback Machine

Lab data is measured using Lighthouse, Mobile mode unless otherwise specified. Field data is reported from Chrome UX Report (using p75 measurements).

Stack

Self-hosted · nginx Hosted by Self-hosted

Lighthouse Scores LAB Simulated

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

Metrics LAB FIELD

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 (2026-09-06 → 2026-10-03), origin-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 1.61 s good ↓ -390 ms (-19.5%) significant 1.58 s – 2.00 s 765 ms good 95.6% 2.1% 2.3%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — — —
CLS CWV Cumulative Layout Shift 0 good → no change 0 – 0 0 good 100% 0% 0%
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms n/a —
FCP First Contentful Paint 1.46 s good ↓ -73 ms (-4.8%) 1.43 s – 1.53 s 764 ms good 91.6% 5.6% 2.8%
Speed Index 1.46 s good ↓ -1014 ms (-41%) significant 1.43 s – 2.47 s n/a —
TTFB Time to First Byte 730 ms good ↓ -37 ms (-4.8%) 714 ms – 767 ms 555 ms good 80.7% 16.6% 2.7%

LCP Subparts LAB Unthrottled

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

element render delay 178 ms
time to first byte 127 ms

LCP LAB Simulated vs LCP FIELD

Lab 1.61 s
Field p75 765 ms

The lab LCP is 2.1× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 55.4 kB → no change 55.4 kB – 55.4 kB
Requests 11 → no change 11 – 11
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 0 B → no change 0 B – 0 B

By resource type

Type Transfer Share Size Requests
other 72.4% 40.1 kB 4
stylesheet 11.7% 6.5 kB 3
script 8.9% 4.9 kB 2
document 5% 2.8 kB 1
image 2.1% 1.2 kB 1
Total 55.4 kB 11

Page health

Metric Value Change / range Trend
Main Thread Work 191 ms ↓ -27 ms (-12.2%) 146 ms – 218 ms
Long Tasks 0 → no change 0 – 0
DOM Elements 514 → no change 514 – 514
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 5 → no change 5 – 5
A11y Failures 0 → no change 0 – 0
A11y Failing Nodes 0 → no change 0 – 0

Main thread work

Task Time Share Duration Simulated
other 53% 101 ms
style layout 24% 46 ms
script evaluation 8% 16 ms
parse HTML 8% 16 ms
paint composite render 5% 10 ms
script parse compile 2% 3 ms
Total 191 ms

Axe violations axe-core 4.13.0, full rule set

5 violating nodes across 1 rule, 720 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • serious scrollable-region-focusable — Scrollable region must have keyboard access 5 nodes
    Offending elements
    1. .preview:nth-child(1) > .code_wrapper > pre 
      <pre class="language-html">
    2. .preview:nth-child(2) > .code_wrapper > pre 
      <pre class="language-html">
    3. .preview:nth-child(3) > .code_wrapper > pre 
      <pre class="language-html">
    4. .preview:nth-child(4) > .code_wrapper > pre 
      <pre class="language-html">
    5. .preview:nth-child(5) > .code_wrapper > pre 
      <pre class="language-html">

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache http/1.1

Measurement log

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-09-26 828 ms — 0 828 ms 606 ms
2026-09-19 765 ms — 0 785 ms 609 ms
2026-04-18 → 2026-09-12 No data — 22 weeks under the CrUX reporting threshold
2026-04-11 1.20 s — 0 1.31 s 616 ms

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 5, 2026, 8:32 AM UTC 99 1.61 s 0 0 ms 55.4 kB 3/3 ±1 2,426 -2% 24s Wayback
Sep 28, 2026, 4:00 AM UTC 99 2.00 s 0 0 ms 55.4 kB 3/3 ±1 2,446 -2% 26.3s Wayback
Sep 21, 2026, 1:05 AM UTC 99 1.96 s 0 0 ms 55.4 kB 3/3 ±1 3,039 +22% 25.2s Wayback
Sep 13, 2026, 11:05 PM UTC 99 1.61 s 0 0 ms 55.4 kB 3/3 ±1 2,315 -7% 23.8s Wayback
Sep 6, 2026, 9:13 PM UTC 99 1.61 s 0 0 ms 55.4 kB 3/3 ±0 2,340 -6% 24s Wayback
Aug 30, 2026, 8:51 PM UTC 99 1.64 s 0 0 ms 55.4 kB 3/3 ±2 2,986 +20% 24.1s Wayback
Aug 21, 2026, 12:45 PM UTC 99 1.58 s 0 0 ms 55.4 kB 3/3 ±0 2,455 -1% 24.3s Wayback

Embed this score

Use this web component to show htmhell.dev'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.htmhell.dev/"></speedlify2-score>