Check of ciunkos.com/ksef-invoice-validator

Oct 22, 2026, 00:40 · manual

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
LCP
910 msgood
CLS
0good
TBT
0 msgood
FCP
910 msgood
TTFB
11 msgood
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
26 KB
Long tasks
0
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 2824

Loads

LoadPerfLCPFCPTBTCLSTTFB
1100866 ms866 ms0 ms055 ms
2100911 ms911 ms0 ms012 ms
3100910 ms910 ms0 ms011 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.