Website readiness profile · Snapshot 23 October 2026
wowow.co.jp
wowow.co.jp's public homepage, certificate and DNS checked against 31 practices and compared with 536 Entertainment & Video Streaming sites.
- Readiness index
- 58/100
- Ahead of
- 35%
- Practices observed
- 15/30
- Popularity band
- Top 50K
Entertainment & Video Streaming median 62
of measured Entertainment & Video Streaming sites
1 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: wowow.co.jp. Thin bar: Entertainment & Video Streaming peer median.
Enable
69/100
Peers 80
Harden
63/100
Peers 52
Accelerate
38/100
Peers 60
Recover
0/100
Peers 12
Priority fixes for wowow.co.jp
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.
89% of Entertainment & Video Streaming peers do this. Limit: Certificate and protocol were observed from one vantage point; CDNs can present different certificates by region.
Priority 2 · 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.
89% of Entertainment & Video Streaming peers do this.
Priority 3 · Accelerate
Modern image formats in use
Observed: The homepage had 42 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 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.
69% of Entertainment & Video Streaming peers do this.
What wowow.co.jp already does well
Practices fewer than half of Entertainment & Video Streaming peers use.
- Referrer-Policy setReferrer-Policy present.21% of peers
- HSTS kept for at least a yearHSTS with a 730-day max-age.31% of peers
- DMARC policy enforces quarantine or rejectDMARC policy p=reject.31% of peers
What we saw
- Homepage checked
- https://www.wowow.co.jp/
- Homepage response
- HTTP 200
- TLS
- TLSv1.2, http/1.1
- Certificate
- Cybertrust Japan Co., Ltd., 394-day validity, expiring 2026-12-05
- DNS operators
- Azure DNS
- HSTS
- max-age 730 days
- DMARC policy
- p=reject
- Homepage HTML
- 56 KB, gzip
- Images on homepage
- 42 (svg 41, gif 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
Not observed 15
- TLS 1.3 negotiated
- Certificate lifetime of 100 days or less
- CAA records limit who can issue certificates
- DNSSEC signed
- security.txt published
- Content Security Policy present
- HTTP/2 negotiated
- HTTP/3 advertised
- Modern image formats in use
- Offscreen images lazy-loaded
- Reachable over IPv6
- Canonical URL declared
- Structured data present
- Social preview image set
- Nameservers spread across providers
Observed 15
- HTTP requests move to HTTPS
- HSTS kept for at least a year
- Certificate has more than 14 days left
- DMARC policy enforces quarantine or reject
- X-Content-Type-Options: nosniff
- Framing restricted
- Referrer-Policy set
- HTML compressed
- No render-blocking scripts in <head>
- robots.txt published
- XML sitemap discoverable
- Meta description written
- Mobile viewport configured
- Page language declared
- At most one redirect to the homepage
Not measured 1
- Static files cached for 30 days or more
Own wowow.co.jp?
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: wowow.co.jp. This profile covers configuration only.