Website readiness profile · Snapshot 23 October 2026
di.se
di.se's public homepage, certificate and DNS checked against 31 practices and compared with 3,856 News & Media sites.
- Readiness index
- 81/100
- Ahead of
- 92%
- Practices observed
- 22/30
- Popularity band
- Top 5K
News & Media median 68
of measured News & Media sites
1 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: di.se. Thin bar: News & Media peer median.
Enable
91/100
Peers 89
Harden
82/100
Peers 56
Accelerate
75/100
Peers 68
Recover
0/100
Peers 11
Priority fixes for di.se
Ordered by impact and by how common each practice is among peers.
Priority 1 · Accelerate
Modern image formats in use
Observed: The homepage had 112 images and none used WebP or AVIF.
Why it matters: WebP and AVIF are typically much smaller than JPEG or PNG at similar quality, and images are often the heaviest part of a page.
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. Limit: Based on the homepage HTML delivered to an automated client; scripts that run later were not executed.
Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format
Priority 2 · Accelerate
Offscreen images lazy-loaded
Observed: The homepage had 112 images and none used loading="lazy".
What to do: Add loading="lazy" to images below the fold. Do not lazy-load the main hero image, because that delays the largest visible element.
72% of News & Media peers do this.
Priority 3 · 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.
71% of News & Media peers do this.
Priority 4 · Harden
X-Content-Type-Options: nosniff
Observed: The homepage response did not include X-Content-Type-Options: nosniff.
What to do: Send X-Content-Type-Options: nosniff on all responses and make sure each file is served with the correct Content-Type.
42% of News & Media peers do this.
What di.se already does well
Practices fewer than half of News & Media peers use.
- security.txt publishedsecurity.txt with a contact found.6.2% of peers
- Content Security Policy presentContent-Security-Policy present.29% of peers
- HSTS kept for at least a yearHSTS with a 365-day max-age.35% of peers
What we saw
- Homepage checked
- https://www.di.se/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- Let's Encrypt, 89-day validity, expiring 2026-12-19
- DNS operators
- Google Cloud DNS
- HSTS
- max-age 365 days
- DMARC policy
- p=quarantine
- Homepage HTML
- 540 KB, br
- Images on homepage
- 112 (jpg 261, png 79)
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 8
Observed 22
- 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
- security.txt published
- DMARC policy enforces quarantine or reject
- Framing restricted
- Content Security Policy present
- HTTP/2 negotiated
- HTTP/3 advertised
- HTML compressed
- Static files cached for 30 days or more
- No render-blocking scripts in <head>
- XML sitemap discoverable
- Reachable over IPv6
- Canonical URL declared
- Meta description written
- Mobile viewport configured
- Structured data present
- Page language declared
- At most one redirect to the homepage
Not measured 1
- robots.txt published
Own di.se?
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Live status for this site: Status Is Down: di.se. This profile covers configuration only.