Check of ciunkos.com/ksef-invoice-validator

Nov 3, 2026, 14:43 · daily

Lighthouse 13.5 (mobile, simulated throttling), median of three runs. Scores 0–100: 90 and up green, 50–89 orange, below 50 red; a dash means the category was not measured in that check.

TBT is the lab stand-in for INP, which needs real interactions.

Performance
100good±0 vs previous
LCP
973 msgood+5 ms vs previous
CLS
0good±0 vs previous
TBT
0 msgood±0 vs previous
FCP
973 msgood+5 ms vs previous
TTFB
14 msgood−3 ms vs previous

No slowdown against the previous check and the 7-day median.

First screen: https://ciunkos.com/ksef-invoice-validator
First screen
LCP element
main > section.hero > div.wrap > p.lead Your own system, OMS or SaaS now has to send invoices to KSeF. Drop an FA(3) XM…
Page weight
28 KB
Long tasks
2
Conditions
Lighthouse 13.5.0, mobile (Moto G Power emulation, 412×823), simulated throttling (150 ms RTT, 1.6 Mbps, CPU 4×), median of 3 runs, benchmarkIndex 1542

Loads

LoadPerfLCPFCPTBTCLSTTFB
1100998 ms998 ms0 ms082 ms
2100966 ms966 ms0 ms013 ms
3100973 ms973 ms0 ms014 ms

What failed

Performance 100

Accessibility 100

Nothing failed in this category.

Best Practices 100

Nothing failed in this category.

SEO 100

Nothing failed in this category.

Google PageSpeed Insights: Comparison details

Vitals Desk is the primary measurement. Google adds one mobile lab run from its servers. This comparison does not change our scores, history or slowdown emails.

Substantial differences: LCP, FCP

The Lighthouse versions differ; scores and checks may not be directly comparable.

Different locations, hardware, Lighthouse versions and a single run versus our three-run median can produce different results. These are comparison notes, not regression alerts.

Google PageSpeed Insights
MetricVitals DeskGoogleGoogle minus Vitals Desk
Performance10099−1
Accessibility100100±0
Best Practices10092−8
SEO100100±0
LCP973 ms1.5 s+558 ms
CLS00±0
TBT0 ms70 ms+70 ms
FCP973 ms1.5 s+558 ms
TTFB14 ms1 ms−13 ms
Lighthouse version
13.6.0
Google checked at
Nov 3, 2026, 14:43
Google’s final URL
https://ciunkos.com/ksef-invoice-validator

Additional failed checks in Google’s sample

These appear in Google’s saved sample but not in our saved list. Each source keeps a limited list.

  • Legacy JavaScript legacy-javascript-insight (Performance)
  • Reduce unused JavaScript unused-javascript (Performance)
  • Browser errors were logged to the console errors-in-console (Best Practices)
  • Issues were logged in the `Issues` panel in Chrome Devtools inspector-issues (Best Practices)

Open PageSpeed Insights