Website readiness profile · Snapshot 23 October 2026
corendon.nl
corendon.nl's public homepage, certificate and DNS checked against 31 practices and compared with 478 Travel Bookings & Trip Planning sites.
- Readiness index
- 80/100
- Ahead of
- 87%
- Practices observed
- 23/31
- Popularity band
- Top 50K
Travel Bookings & Trip Planning median 68
of measured Travel Bookings & Trip Planning sites
0 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: corendon.nl. Thin bar: Travel Bookings & Trip Planning peer median.
Enable
87/100
Peers 86
Harden
80/100
Peers 60
Accelerate
78/100
Peers 64
Recover
0/100
Peers 13
Priority fixes for corendon.nl
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 corendon.nl 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.
50% of Travel Bookings & Trip Planning peers do this. Limit: Read from public DNS at the time of the check; records may have changed since.
Priority 2 · Accelerate
No render-blocking scripts in <head>
Observed: The homepage <head> loaded 1 external script without async or defer.
What to do: Add defer to scripts that need the DOM, async to independent ones such as analytics, or move them to the end of the body.
On Next.js: Use the next/script component with an appropriate loading strategy.
44% of Travel Bookings & Trip Planning peers do this.
Guide: Control Third-Party Scripts Before They Control Your Page
Priority 3 · Enable
Social preview image set
Observed: The homepage had no og:image, so shared links may show without a preview image.
What to do: Add Open Graph tags, including og:image with a 1200 x 630 image.
68% of Travel Bookings & Trip Planning 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.
33% of Travel Bookings & Trip Planning peers do this.
What corendon.nl already does well
Practices fewer than half of Travel Bookings & Trip Planning peers use.
- DNSSEC signedDNSSEC delegation (DS record) present.5.2% of peers
- security.txt publishedsecurity.txt with a contact found.17% of peers
- Content Security Policy presentContent-Security-Policy present.30% of peers
What we saw
- Homepage checked
- https://www.corendon.nl/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- Sectigo, 182-day validity, expiring 2027-03-17
- Platform or framework
- Next.js
- DNS operators
- Azure DNS
- HSTS
- max-age 730 days, includeSubDomains, preload
- DMARC policy
- p=none
- Homepage HTML
- 1,566 KB, gzip
- Images on homepage
- 67 (jpg 391, png 29, svg 12)
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 8
Observed 23
- HTTP requests move to HTTPS
- HSTS kept for at least a year
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- DNSSEC signed
- security.txt published
- X-Content-Type-Options: nosniff
- Framing restricted
- Content Security Policy present
- 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
- robots.txt published
- XML sitemap discoverable
- Canonical URL declared
- Meta description written
- Mobile viewport configured
- Structured data present
- Page language declared
- At most one redirect to the homepage
Own corendon.nl?
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: corendon.nl. This profile covers configuration only.