centrum24.pl

Readiness by lane

Green: centrum24.pl. Thin bar: Banking & Finance peer median.

Priority fixes for centrum24.pl

Ordered by impact and by how common each practice is among peers.

1. Priority 1 · Enable

   Mobile viewport configured

   Observed: The homepage had no viewport meta tag, so phones may render it zoomed out.

   Why it matters: Without it, phones render the page at desktop width and shrink it, which makes text tiny and hard to use.

   What to do: Add <meta name="viewport" content="width=device-width, initial-scale=1"> and check the layout on small screens.

   95% of Banking & Finance peers do this. Limit: Based on the homepage HTML delivered to an automated client; scripts that run later were not executed.

   Guide: Responsive Web Design Checklist for Real Devices

2. Priority 2 · Accelerate

   HTTP/2 negotiated

   Observed: The TLS handshake selected HTTP/1.1 instead of HTTP/2.

   What to do: Enable HTTP/2 on your CDN or server. Most CDNs do this by default.

   73% of Banking & Finance peers do this.

   Guide: CDN Guide for Website Owners

3. Priority 3 · Harden

   TLS 1.3 negotiated

   Observed: The TLS connection negotiated TLSv1.2.

   What to do: Enable TLS 1.3 on your CDN or server. Keep TLS 1.2 available for older clients unless you have checked your audience.

   86% of Banking & Finance peers do this.

   Guide: HTTPS and TLS Guide for Website Owners

4. Priority 4 · Enable

   Canonical URL declared

   Observed: The homepage did not declare a canonical URL.

   What to do: Add a self-referencing canonical link to every indexable page, using the final https:// URL.

   72% of Banking & Finance peers do this.

   Guide: Canonical Tags: A Decision Guide for Duplicate URLs

What centrum24.pl already does well

Practices fewer than half of Banking & Finance peers use.

• CAA records limit who can issue certificatesCAA limits issuance to certum.pl, elektronicznypodpis.pl, letsencrypt.org and others.20% of peers
• Static files cached for 30 days or moreLong-lived caching on static files.43% of peers

What we saw

Homepage checked

https://www.centrum24.pl/

Homepage response

HTTP 200, after 2 redirects

TLS

TLSv1.2

Certificate

Asseco Data Systems S.A., 198-day validity, expiring 2026-12-27

DNS operators

Amazon Route 53

HSTS

max-age 365 days, includeSubDomains, preload

DMARC policy

p=reject

Homepage HTML

34 KB, gzip

Images on homepage

2 (svg 2)

Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.

Stack and providers

Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.

All 31 checks

Select a gap for the method and fix. How each check works

Compare with other Banking & Finance sites

• intermatico.com49
• myaccountaccess.com50
• nrkn.co.jp50
• pex.jp49
• venezolano.com51

Banking & Finance readiness benchmark