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Category benchmark · Snapshot 23 October 2026

Search Engines: website readiness

31 configuration checks across 59 Search Engines sites from the SID website catalog, with 40 individual profiles for sites in the Chrome UX Report top 50K.

Sites measured
59

all popularity bands

Median readiness index
65/100

all sites: 64

Profiles
40

top-50K sites

Weakest lane
Recover

lowest weighted score

Readiness by lane

Enable

74/100

All sites 77

Harden

57/100

All sites 56

Accelerate

68/100

All sites 64

Recover

8/100

All sites 10

Biggest gaps for Search Engines sites

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

  1. HSTS kept for at least a year

    30% 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

  2. Modern image formats in use

    31% 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

  3. security.txt published

    11% 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

  4. DMARC policy enforces quarantine or reject

    51% 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

  5. Content Security Policy present

    28% observed · all sites 32%

    Start with Content-Security-Policy-Report-Only to see what would break, tighten the policy over a few weeks, then enforce it.

    Guide: Payment Security and PCI DSS: What Website Owners Need to Know

  6. DNSSEC signed

    10% observed · all sites 8%

    Enable DNSSEC at your DNS provider, then add the DS record at your registrar. Plan provider moves carefully: a stale DS record can make the domain fail to resolve.

    Guide: Website Uptime Readiness: Prepare Before Traffic Arrives

Where Search Engines sites lead

  • No render-blocking scripts in <head>72% observedall sites 48%
  • CAA records limit who can issue certificates37% observedall sites 13%
  • DMARC policy enforces quarantine or reject51% observedall sites 39%
  • Static files cached for 30 days or more62% observedall sites 51%

Stack mix

CDN and edge

Platform or framework

DNS operator

Certificate authority

Readiness leaders

Search Engines 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.

  1. scryfall.com88/100
  2. dastelefonbuch.de82/100
  3. facecheck.id82/100
  4. bing.com79/100
  5. consensus.app79/100
  6. duckduckgo.com78/100
  7. qwant.com78/100
  8. pimeyes.com77/100
  9. startpagina.nl77/100
  10. spokeo.com76/100

All 31 checks for Search Engines

CheckLaneObservedAll sitesMeasured
HTTP requests move to HTTPSHarden87%91%53
HSTS kept for at least a yearHarden30%34%54
TLS 1.3 negotiatedHarden90%91%59
Certificate has more than 14 days leftHarden98%99%59
Certificate lifetime of 100 days or lessHarden58%67%59
CAA records limit who can issue certificatesHarden37%13%59
DNSSEC signedHarden10%8%59
security.txt publishedHarden11%7.1%54
DMARC policy enforces quarantine or rejectHarden51%39%59
X-Content-Type-Options: nosniffHarden44%48%54
Framing restrictedHarden56%51%54
Content Security Policy presentHarden28%32%54
Referrer-Policy setHarden28%24%54
HTTP/2 negotiatedAccelerate92%90%59
HTTP/3 advertisedAccelerate37%37%54
HTML compressedAccelerate96%93%54
Static files cached for 30 days or moreAccelerate62%51%42
Modern image formats in useAccelerate31%40%36
Offscreen images lazy-loadedAccelerate62%62%29
No render-blocking scripts in <head>Accelerate72%48%54
robots.txt publishedEnable85%76%52
XML sitemap discoverableEnable60%70%57
Reachable over IPv6Enable53%48%59
Canonical URL declaredEnable61%68%54
Meta description writtenEnable89%84%54
Mobile viewport configuredEnable83%94%54
Structured data presentEnable37%51%54
Social preview image setEnable61%57%54
Page language declaredEnable96%90%54
At most one redirect to the homepageEnable95%98%55
Nameservers spread across providersRecover8.5%10%59

Search Engines profiles

Readiness index shown next to each site.