Website readiness profile · Snapshot 23 October 2026
downsub.com
downsub.com's public homepage, certificate and DNS checked against 31 practices and compared with 492 Web Tools sites.
- Readiness index
- 62/100
- Ahead of
- 30%
- Practices observed
- 16/29
- Popularity band
- Top 50K
Web Tools median 67
of measured Web Tools sites
2 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: downsub.com. Thin bar: Web Tools peer median.
Enable
92/100
Peers 84
Harden
43/100
Peers 55
Accelerate
67/100
Peers 69
Recover
0/100
Peers 6
Priority fixes for downsub.com
Ordered by impact and by how common each practice is among peers.
Priority 1 · Accelerate
Static files cached for 30 days or more
Observed: A same-site stylesheet or script was cacheable for 7 days, short of the 30-day benchmark.
Why it matters: Returning visitors and later page views reuse cached files instead of downloading them again.
What to do: Give versioned (fingerprinted) CSS, JavaScript, fonts and images Cache-Control: public, max-age=31536000, immutable, and change the file name whenever the content changes.
On Cloudflare: Use Cache Rules to set edge and browser TTLs for static file paths.
54% of Web Tools peers do this. Limit: Read from the homepage response only; other pages or regions may send different headers.
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.
On Cloudflare: Enable HSTS under SSL/TLS > Edge Certificates > HTTP Strict Transport Security and raise max-age gradually.
30% of Web Tools peers do this.
Priority 3 · Harden
DMARC policy enforces quarantine or reject
Observed: The DMARC policy for downsub.com 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.
23% of Web Tools 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.
On Cloudflare: Enable HTTP/3 (with QUIC) under Speed > Optimization > Protocol Optimization.
56% of Web Tools peers do this.
What we saw
- Homepage checked
- https://downsub.com/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- Google Trust Services, 90-day validity, expiring 2026-12-20
- CDN or edge
- Cloudflare
- DNS operators
- Cloudflare
- DMARC policy
- p=none
- Homepage HTML
- 41 KB, br
- Images on homepage
- 1 (jpg 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 13
- HSTS kept for at least a year
- CAA records limit who can issue certificates
- DNSSEC signed
- security.txt published
- DMARC policy enforces quarantine or reject
- X-Content-Type-Options: nosniff
- Framing restricted
- Content Security Policy present
- Referrer-Policy set
- HTTP/3 advertised
- Static files cached for 30 days or more
- Structured data present
- Nameservers spread across providers
Observed 16
- HTTP requests move to HTTPS
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- Certificate lifetime of 100 days or less
- HTTP/2 negotiated
- HTML compressed
- No render-blocking scripts in <head>
- robots.txt published
- XML sitemap discoverable
- Reachable over IPv6
- Canonical URL declared
- Meta description written
- Mobile viewport configured
- Social preview image set
- Page language declared
- At most one redirect to the homepage
Not measured 2
- Modern image formats in use
- Offscreen images lazy-loaded
Own downsub.com?
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Live status for this site: Status Is Down: downsub.com. This profile covers configuration only.