Website readiness profile · Snapshot 23 October 2026
jamieoliver.com
jamieoliver.com's public homepage, certificate and DNS checked against 31 practices and compared with 413 Food & Grocery Delivery sites.
- Readiness index
- 82/100
- Ahead of
- 92%
- Practices observed
- 24/31
- Popularity band
- Top 50K
Food & Grocery Delivery median 68
of measured Food & Grocery Delivery sites
0 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: jamieoliver.com. Thin bar: Food & Grocery Delivery peer median.
Enable
100/100
Peers 85
Harden
68/100
Peers 59
Accelerate
90/100
Peers 64
Recover
0/100
Peers 12
Priority fixes for jamieoliver.com
Ordered by impact and by how common each practice is among peers.
Priority 1 · Harden
DMARC policy enforces quarantine or reject
Observed: The DMARC policy for jamieoliver.com was p=none, which asks receivers to take no action on failing mail.
Why it matters: An enforcing DMARC policy helps receiving mail systems reject email that falsely claims to come from your domain, a common route for phishing your customers.
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.
42% of Food & Grocery Delivery peers do this. Limit: Read from public DNS at the time of the check; records may have changed since.
Priority 2 · Harden
Content Security Policy present
Observed: The homepage response did not include a Content-Security-Policy header.
What to do: Start with Content-Security-Policy-Report-Only to see what would break, tighten the policy over a few weeks, then enforce it.
37% of Food & Grocery Delivery peers do this.
Guide: Payment Security and PCI DSS: What Website Owners Need to Know
Priority 3 · 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.
35% of Food & Grocery Delivery peers do this.
Priority 4 · Harden
CAA records limit who can issue certificates
Observed: No CAA record was found for jamieoliver.com, so any public certificate authority may issue for it.
What to do: 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.
On Cloudflare: Cloudflare documents which CAs its managed certificates need; include them in your CAA records.
9.7% of Food & Grocery Delivery peers do this.
What jamieoliver.com already does well
Practices fewer than half of Food & Grocery Delivery peers use.
- Referrer-Policy setReferrer-Policy present.27% of peers
- Modern image formats in useWebP or AVIF images detected.40% of peers
- HSTS kept for at least a yearHSTS with a 365-day max-age.42% of peers
What we saw
- Homepage checked
- https://www.jamieoliver.com/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- Google Trust Services, 90-day validity, expiring 2026-12-11
- CDN or edge
- Cloudflare, Netlify
- Platform or framework
- Astro
- DNS operators
- Cloudflare
- HSTS
- max-age 365 days
- DMARC policy
- p=none
- Homepage HTML
- 782 KB, gzip
- Images on homepage
- 117 (webp 535, jpg 246)
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 7
Observed 24
- HTTP requests move to HTTPS
- HSTS kept for at least a year
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- Certificate lifetime of 100 days or less
- X-Content-Type-Options: nosniff
- Framing restricted
- Referrer-Policy set
- HTTP/2 negotiated
- HTML compressed
- Static files cached for 30 days or more
- Modern image formats in use
- Offscreen images lazy-loaded
- No render-blocking scripts in <head>
- robots.txt published
- XML sitemap discoverable
- Reachable over IPv6
- Canonical URL declared
- Meta description written
- Mobile viewport configured
- Structured data present
- Social preview image set
- Page language declared
- At most one redirect to the homepage
Own jamieoliver.com?
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: jamieoliver.com. This profile covers configuration only.