Website readiness profile · Snapshot 23 October 2026
ardmediathek.de
ardmediathek.de's public homepage, certificate and DNS checked against 31 practices and compared with 536 Entertainment & Video Streaming sites.
- Readiness index
- 74/100
- Ahead of
- 84%
- Practices observed
- 20/29
- Popularity band
- Top 5K
Entertainment & Video Streaming median 62
of measured Entertainment & Video Streaming sites
2 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: ardmediathek.de. Thin bar: Entertainment & Video Streaming peer median.
Enable
71/100
Peers 80
Harden
82/100
Peers 52
Accelerate
65/100
Peers 60
Recover
100/100
Peers 12
Priority fixes for ardmediathek.de
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.
71% of Entertainment & Video Streaming 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 · Accelerate
Modern image formats in use
Observed: The homepage had 31 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.
32% of Entertainment & Video Streaming peers do this.
Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format
Priority 3 · Accelerate
Offscreen images lazy-loaded
Observed: The homepage had 31 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.
54% of Entertainment & Video Streaming peers do this.
Priority 4 · Accelerate
HTTP/3 advertised
Observed: The homepage did not advertise HTTP/3 through an Alt-Svc header.
What to do: Turn on HTTP/3 at your CDN. Browsers fall back to HTTP/2 automatically, so the risk is low.
34% of Entertainment & Video Streaming peers do this.
What ardmediathek.de already does well
Practices fewer than half of Entertainment & Video Streaming peers use.
- security.txt publishedsecurity.txt with a contact found.5.6% of peers
- Nameservers spread across providersNameservers spread across more than one operator.12% of peers
- Content Security Policy presentContent-Security-Policy present.18% of peers
What we saw
- Homepage checked
- https://www.ardmediathek.de/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- DigiCert, 198-day validity, expiring 2027-05-01
- DNS operators
- 2 self-run or other nameserver domains
- HSTS
- max-age 365 days, includeSubDomains
- DMARC policy
- p=reject
- Homepage HTML
- 488 KB, gzip
- Images on homepage
- 31
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 20
- HSTS kept for at least a year
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- security.txt published
- DMARC policy enforces quarantine or reject
- 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
- No render-blocking scripts in <head>
- Canonical URL declared
- Meta description written
- Mobile viewport configured
- Social preview image set
- Page language declared
- At most one redirect to the homepage
- Nameservers spread across providers
Not measured 2
- HTTP requests move to HTTPS
- robots.txt published
Own ardmediathek.de?
Re-run the checks after a change, keep a private action plan in a free workspace, or report a mistake.
Live status for this site: Status Is Down: ardmediathek.de. This profile covers configuration only.