Website readiness profile · Snapshot 23 October 2026
korkortonline.se
korkortonline.se's public homepage, certificate and DNS checked against 31 practices and compared with 1,516 Education & Online Learning sites.
- Readiness index
- 75/100
- Ahead of
- 84%
- Practices observed
- 21/30
- Popularity band
- Top 50K
Education & Online Learning median 61
of measured Education & Online Learning sites
1 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: korkortonline.se. Thin bar: Education & Online Learning peer median.
Enable
56/100
Peers 75
Harden
89/100
Peers 54
Accelerate
69/100
Peers 57
Recover
100/100
Peers 13
Priority fixes for korkortonline.se
Ordered by impact and by how common each practice is among peers.
Priority 1 · Accelerate
HTTP/2 negotiated
Observed: The TLS handshake selected http/1.1 instead of HTTP/2.
Why it matters: HTTP/2 sends many files over one connection, which speeds up pages with lots of images, styles and scripts.
What to do: Enable HTTP/2 on your CDN or server. Most CDNs do this by default.
80% of Education & Online Learning peers do this. Limit: Certificate and protocol were observed from one vantage point; CDNs can present different certificates by region.
Priority 2 · Enable
XML sitemap discoverable
Observed: No sitemap was listed in robots.txt or found at /sitemap.xml.
What to do: Generate an XML sitemap of canonical URLs, reference it in robots.txt and submit it in Google Search Console.
65% of Education & Online Learning peers do this.
Guide: XML Sitemap Guide: Include Only URLs You Stand Behind
Priority 3 · 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.
62% of Education & Online Learning peers do this.
Priority 4 · Enable
Social preview image set
Observed: The homepage had no og:image, so shared links may show without a preview image.
What to do: Add Open Graph tags, including og:image with a 1200 x 630 image.
52% of Education & Online Learning peers do this.
What korkortonline.se already does well
Practices fewer than half of Education & Online Learning peers use.
- Nameservers spread across providersNameservers spread across more than one operator.13% of peers
- CAA records limit who can issue certificatesCAA limits issuance to amazon.com, amazonaws.com, amazontrust.com and others.13% of peers
- Content Security Policy presentContent-Security-Policy present.25% of peers
What we saw
- Homepage checked
- https://korkortonline.se/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, http/1.1
- Certificate
- Let's Encrypt, 89-day validity, expiring 2026-12-26
- DNS operators
- 2 self-run or other nameserver domains
- HSTS
- max-age 730 days, includeSubDomains, preload
- DMARC policy
- p=reject
- Homepage HTML
- 8 KB, gzip
- Images on homepage
- 3 (jpg 3, avif 2, svg 1, png 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 9
Observed 21
- HTTP requests move to HTTPS
- HSTS kept for at least a year
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- Certificate lifetime of 100 days or less
- CAA records limit who can issue certificates
- DMARC policy enforces quarantine or reject
- X-Content-Type-Options: nosniff
- Framing restricted
- Content Security Policy present
- Referrer-Policy set
- HTML compressed
- Static files cached for 30 days or more
- Modern image formats in use
- No render-blocking scripts in <head>
- robots.txt published
- Meta description written
- Mobile viewport configured
- Page language declared
- At most one redirect to the homepage
- Nameservers spread across providers
Not measured 1
- Offscreen images lazy-loaded
Own korkortonline.se?
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Live status for this site: Status Is Down: korkortonline.se. This profile covers configuration only.