Website readiness profile · Snapshot 23 October 2026
tui.pl
tui.pl's public homepage, certificate and DNS checked against 31 practices and compared with 478 Travel Bookings & Trip Planning sites.
- Readiness index
- 75/100
- Ahead of
- 71%
- Practices observed
- 20/31
- 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: tui.pl. Thin bar: Travel Bookings & Trip Planning peer median.
Enable
87/100
Peers 86
Harden
63/100
Peers 60
Accelerate
85/100
Peers 64
Recover
0/100
Peers 13
Priority fixes for tui.pl
Ordered by impact and by how common each practice is among peers.
Priority 1 · Accelerate
Modern image formats in use
Observed: The homepage had 25 images and none used WebP or AVIF.
Why it matters: WebP and AVIF are typically much smaller than JPEG or PNG at similar quality, and images are often the heaviest part of a page.
What to do: Serve WebP or AVIF with a JPEG or PNG fallback, either through an image CDN or by generating both formats at build time.
On Vercel: Vercel Image Optimization serves modern formats.
41% of Travel Bookings & Trip Planning peers do this. Limit: Based on the homepage HTML delivered to an automated client; scripts that run later were not executed.
Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format
Priority 2 · Harden
Framing restricted
Observed: The homepage did not send frame-ancestors or X-Frame-Options, so other sites may frame it.
What to do: Send Content-Security-Policy: frame-ancestors 'self' (or a list of trusted origins). X-Frame-Options: SAMEORIGIN covers older browsers.
On Amazon CloudFront: Set frame options in a response headers policy.
56% of Travel Bookings & Trip Planning peers do this.
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 · 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.
On Next.js: Next.js documents nonce-based CSP with middleware.
30% of Travel Bookings & Trip Planning peers do this.
Guide: Payment Security and PCI DSS: What Website Owners Need to Know
What tui.pl already does well
Practices fewer than half of Travel Bookings & Trip Planning peers use.
- HTTP/3 advertisedHTTP/3 advertised.33% of peers
- No render-blocking scripts in <head>Head scripts load without blocking.44% of peers
- HSTS kept for at least a yearHSTS with a 365-day max-age covering subdomains.46% of peers
What we saw
- Homepage checked
- https://www.tui.pl/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- Asseco Data Systems S.A., 364-day validity, expiring 2027-03-02
- CDN or edge
- Amazon CloudFront, Vercel
- Platform or framework
- WordPress, Next.js
- DNS operators
- Azure DNS
- HSTS
- max-age 365 days, includeSubDomains, preload
- DMARC policy
- p=quarantine
- Homepage HTML
- 545 KB, br
- Images on homepage
- 25 (jpg 11, png 5, svg 2)
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 11
Observed 20
- HTTP requests move to HTTPS
- HSTS kept for at least a year
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- DMARC policy enforces quarantine or reject
- X-Content-Type-Options: nosniff
- HTTP/2 negotiated
- HTTP/3 advertised
- HTML compressed
- Static files cached for 30 days or more
- Offscreen images lazy-loaded
- No render-blocking scripts in <head>
- 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 tui.pl?
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: tui.pl. This profile covers configuration only.