STATUS IS UPWEBSITE READINESS
Owner workspace
Explore SIU

Stack playbook · Snapshot 23 October 2026

Shopify: readiness playbook

What 1,642 measured sites on this hosted platform get right, where they fall short, and the Shopify-specific steps that close each gap.

Sites measured
1,642

detected from homepage HTML and headers

Median readiness index
77/100

all sites: 64

Profiles on this stack
557

top-50K sites

Readiness by lane

Enable

94/100

All sites 77

Harden

65/100

All sites 56

Accelerate

82/100

All sites 64

Recover

5/100

All sites 10

The Shopify playbook

Gaps ordered by impact, with the platform-specific step where one exists.

  1. HSTS kept for at least a year

    5.7% 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. DMARC policy enforces quarantine or reject

    31% 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

  3. security.txt published

    <1% 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. DNSSEC signed

    6.5% 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

  5. Modern image formats in use

    55% 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.

    On Shopify: Shopify's image CDN can serve modern formats; follow Shopify's web performance guidance for themes.

    Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format

  6. CAA records limit who can issue certificates

    33% 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

  7. No render-blocking scripts in <head>

    56% observed · all sites 48%

    Add defer to scripts that need the DOM, async to independent ones such as analytics, or move them to the end of the body.

    Guide: Control Third-Party Scripts Before They Control Your Page

  8. Referrer-Policy set

    3.7% observed · all sites 24%

    Send Referrer-Policy: strict-origin-when-cross-origin unless you have a reason to share more.

    Guide: A Practical Website Health Check for Owners

Where Shopify sites lead

  • Content Security Policy present95% observedall sites 32%
  • HTTP/3 advertised94% observedall sites 37%
  • X-Content-Type-Options: nosniff97% observedall sites 48%
  • Framing restricted97% observedall sites 51%

A note on hosted platforms

On Shopify, the platform controls much of the TLS, header and caching configuration. Owners mostly influence content-level checks such as images, structured data, social previews and the sitemap. Header-level gaps are worth raising with the platform.

All 31 checks on Shopify

CheckLaneObservedAll sitesMeasured
HTTP requests move to HTTPSHarden>99%91%1,556
HSTS kept for at least a yearHarden5.7%34%1,642
TLS 1.3 negotiatedHarden>99%91%1,642
Certificate has more than 14 days leftHarden>99%99%1,642
Certificate lifetime of 100 days or lessHarden98%67%1,642
CAA records limit who can issue certificatesHarden33%13%1,642
DNSSEC signedHarden6.5%8%1,642
security.txt publishedHarden<1%7.1%1,626
DMARC policy enforces quarantine or rejectHarden31%39%1,642
X-Content-Type-Options: nosniffHarden97%48%1,642
Framing restrictedHarden97%51%1,642
Content Security Policy presentHarden95%32%1,642
Referrer-Policy setHarden3.7%24%1,642
HTTP/2 negotiatedAccelerate>99%90%1,642
HTTP/3 advertisedAccelerate94%37%1,642
HTML compressedAccelerate>99%93%1,642
Static files cached for 30 days or moreAccelerate75%51%1,578
Modern image formats in useAccelerate55%40%1,630
Offscreen images lazy-loadedAccelerate93%62%1,609
No render-blocking scripts in <head>Accelerate56%48%1,642
robots.txt publishedEnable>99%76%1,619
XML sitemap discoverableEnable>99%70%1,641
Reachable over IPv6Enable49%48%1,642
Canonical URL declaredEnable99%68%1,642
Meta description writtenEnable98%84%1,642
Mobile viewport configuredEnable>99%94%1,642
Structured data presentEnable85%51%1,642
Social preview image setEnable76%57%1,642
Page language declaredEnable>99%90%1,642
At most one redirect to the homepageEnable>99%98%1,642
Nameservers spread across providersRecover4.5%10%1,633

High-readiness Shopify sites

Related

Service guide: ShopifyAll stack playbooks