Website readiness profile · Snapshot 23 October 2026
o2.pl
o2.pl's public homepage, certificate and DNS checked against 31 practices and compared with 3,856 News & Media sites.
- Readiness index
- 68/100
- Ahead of
- 49%
- Practices observed
- 20/31
- Popularity band
- Top 5K
News & Media median 68
of measured News & Media sites
0 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: o2.pl. Thin bar: News & Media peer median.
Enable
82/100
Peers 89
Harden
65/100
Peers 56
Accelerate
63/100
Peers 68
Recover
0/100
Peers 11
Priority fixes for o2.pl
Ordered by impact and by how common each practice is among peers.
Priority 1 · Enable
XML sitemap discoverable
Observed: No sitemap was listed in robots.txt or found at /sitemap.xml.
Why it matters: A sitemap helps search engines find new and updated pages, especially on large or frequently updated sites.
What to do: Generate an XML sitemap of canonical URLs, reference it in robots.txt and submit it in Google Search Console.
87% of News & Media peers do this. Limit: Only the standard location was requested, once, at the time of the check.
Guide: XML Sitemap Guide: Include Only URLs You Stand Behind
Priority 2 · Harden
HSTS kept for at least a year
Observed: The homepage response did not include a Strict-Transport-Security header.
What to do: Send Strict-Transport-Security on HTTPS responses. Start with a short max-age (for example 300 seconds), confirm every subdomain works over HTTPS, then raise it in steps to 31536000. Add includeSubDomains only when all subdomains are HTTPS. HSTS preload is optional and hard to undo; hstspreload.org itself does not recommend it by default.
35% of News & Media peers do this.
Priority 3 · Accelerate
Modern image formats in use
Observed: The homepage had 231 images and none used WebP or AVIF.
What to do: Serve WebP or AVIF with a JPEG or PNG fallback, either through an image CDN or by generating both formats at build time.
44% of News & Media peers do this.
Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format
Priority 4 · Harden
DMARC policy enforces quarantine or reject
Observed: The DMARC policy for o2.pl was p=none, which asks receivers to take no action on failing mail.
What to do: Publish DMARC with p=none and a reporting address first, fix any legitimate senders that fail SPF or DKIM alignment, then move to quarantine and finally reject.
37% of News & Media peers do this.
What o2.pl already does well
Practices fewer than half of News & Media peers use.
- security.txt publishedsecurity.txt with a contact found.6.2% of peers
- Referrer-Policy setReferrer-Policy present.22% of peers
- Content Security Policy presentContent-Security-Policy present.29% of peers
What we saw
- Homepage checked
- https://www.o2.pl/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- DigiCert, 192-day validity, expiring 2027-04-25
- DNS operators
- 1 self-run or other nameserver domain
- DMARC policy
- p=none
- Homepage HTML
- 418 KB, gzip
- Images on homepage
- 231 (gif 1)
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
Not observed 11
- HSTS kept for at least a year
- Certificate lifetime of 100 days or less
- CAA records limit who can issue certificates
- DNSSEC signed
- DMARC policy enforces quarantine or reject
- HTTP/3 advertised
- Modern image formats in use
- No render-blocking scripts in <head>
- XML sitemap discoverable
- Reachable over IPv6
- Nameservers spread across providers
Observed 20
- HTTP requests move to HTTPS
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- security.txt published
- X-Content-Type-Options: nosniff
- Framing restricted
- Content Security Policy present
- Referrer-Policy set
- HTTP/2 negotiated
- HTML compressed
- Static files cached for 30 days or more
- Offscreen images lazy-loaded
- robots.txt published
- Canonical URL declared
- Meta description written
- Mobile viewport configured
- Structured data present
- Social preview image set
- Page language declared
- At most one redirect to the homepage
Own o2.pl?
Re-run the checks after a change, or verify the site in a free workspace to save reports with history, compare against similar sites and competitors, and track a private action plan. What owners get.
Live status for this site: Status Is Down: o2.pl. This profile covers configuration only.