Category benchmark · Snapshot 23 October 2026

Cloud Storage & File Transfer: website readiness

31 configuration checks across 118 Cloud Storage & File Transfer sites from the SID website catalog, with 82 individual profiles for sites in the Chrome UX Report top 50K.

Sites measured: 118
Median readiness index: 57/100
Profiles: 82
Weakest lane: Recover

Readiness by lane

Enable

68/100

All sites 77

Harden

55/100

All sites 56

Accelerate

56/100

All sites 64

Recover

5/100

All sites 10

Biggest gaps for Cloud Storage & File Transfer sites

The checks with the most room to improve, weighted by impact.

HSTS kept for at least a year
31% observed · all sites 34%
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.
Guide: HTTPS and TLS Guide for Website Owners
Modern image formats in use
23% observed · all sites 40%
Serve WebP or AVIF with a JPEG or PNG fallback, either through an image CDN or by generating both formats at build time.
Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format
DMARC policy enforces quarantine or reject
30% observed · all sites 39%
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.
Guide: A Practical Website Health Check for Owners
Static files cached for 30 days or more
35% observed · all sites 51%
Give versioned (fingerprinted) CSS, JavaScript, fonts and images Cache-Control: public, max-age=31536000, immutable, and change the file name whenever the content changes.
Guide: Browser Caching Guide for Website Owners
security.txt published
5.3% observed · all sites 7.1%
Publish /.well-known/security.txt with at least Contact and Expires fields, as RFC 9116 requires, and review it before it expires.
Guide: A Practical Website Health Check for Owners
CAA records limit who can issue certificates
12% observed · all sites 13%
Publish CAA records naming every CA you actually use, including the CAs your CDN uses for managed certificates. Add an iodef contact if you want reports.
Guide: HTTPS and TLS Guide for Website Owners

Where Cloud Storage & File Transfer sites lead

Certificate lifetime of 100 days or less80% observedall sites 67%
Reachable over IPv661% observedall sites 48%
No render-blocking scripts in <head>56% observedall sites 48%
HTTP/3 advertised44% observedall sites 37%

Stack mix

CDN and edge

Platform or framework

Next.js4.2%
HubSpot CMS1.7%
Angular<1%
Drupal<1%
Shopify<1%
WordPress<1%

DNS operator

Cloudflare56%
Amazon Route 5313%
Bunny DNS2.5%
Constellix2.5%
DNS Made Easy<1%
Google Cloud DNS<1%
Linode/Akamai DNS<1%
Namecheap DNS<1%

Certificate authority

Readiness leaders

Cloud Storage & File Transfer sites in the top 50K with the highest share of observed practices (at least 26 of 31 checks measured). This lists only what we observed on 23 October 2026; owners can request a correction.

All 31 checks for Cloud Storage & File Transfer

Check	Lane	Observed	All sites	Measured
HTTP requests move to HTTPS	Harden	91%	91%	111
HSTS kept for at least a year	Harden	31%	34%	116
TLS 1.3 negotiated	Harden	91%	91%	117
Certificate has more than 14 days left	Harden	>99%	99%	117
Certificate lifetime of 100 days or less	Harden	80%	67%	117
CAA records limit who can issue certificates	Harden	12%	13%	117
DNSSEC signed	Harden	10%	8%	118
security.txt published	Harden	5.3%	7.1%	114
DMARC policy enforces quarantine or reject	Harden	30%	39%	118
X-Content-Type-Options: nosniff	Harden	52%	48%	116
Framing restricted	Harden	53%	51%	116
Content Security Policy present	Harden	24%	32%	116
Referrer-Policy set	Harden	29%	24%	116
HTTP/2 negotiated	Accelerate	82%	90%	117
HTTP/3 advertised	Accelerate	44%	37%	116
HTML compressed	Accelerate	85%	93%	115
Static files cached for 30 days or more	Accelerate	35%	51%	97
Modern image formats in use	Accelerate	23%	40%	60
Offscreen images lazy-loaded	Accelerate	42%	62%	38
No render-blocking scripts in <head>	Accelerate	56%	48%	116
robots.txt published	Enable	78%	76%	109
XML sitemap discoverable	Enable	44%	70%	114
Reachable over IPv6	Enable	61%	48%	118
Canonical URL declared	Enable	41%	68%	116
Meta description written	Enable	88%	84%	116
Mobile viewport configured	Enable	96%	94%	116
Structured data present	Enable	17%	51%	116
Social preview image set	Enable	47%	57%	116
Page language declared	Enable	79%	90%	116
At most one redirect to the homepage	Enable	98%	98%	116
Nameservers spread across providers	Recover	5.1%	10%	118

Cloud Storage & File Transfer profiles

Readiness index shown next to each site.

Cloud Storage & File Transfer: website readiness

Readiness by lane

Biggest gaps for Cloud Storage & File Transfer sites

HSTS kept for at least a year

Modern image formats in use

DMARC policy enforces quarantine or reject

Static files cached for 30 days or more

security.txt published

CAA records limit who can issue certificates