Adding a Cache-Control header can significantly improve repeat-visit performance.
C
Image Optimization
Action
48 images, 0 KB saveable
REVIEW
48 images, 0 KB saveable
Warning::
!
https://trailzyztech.com/assets/images/footer-logo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/icons/trailzyz_log... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/icons/logo_br_line... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/svg/linked-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/icons/whatsapp_bot... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/service-car... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/projects/as... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
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https://trailzyztech.com/assets/images/projects/sa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/zscaler-par... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/about_logo.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/service-car... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/service-car... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/products/pr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/products/pr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/service-car... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/aws-partner... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/svg/contact... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/service-car... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/mail-us-foo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/icons/logo.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/about_arrow... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/service-car... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/products/pr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/svg/whatsap... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/about_visio... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/products/pr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/svg/faceboo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/svg/insta-f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/products/pr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/products/pr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://trailzyztech.com/assets/images/projects/ca... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
48images1.1 MB
0oversized-0 KB
14legacy format
31missing dimensionsCLS risk
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
i
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
B
Compression Algorithm
Main response uses gzip; brotli would be ~20% smaller
REVIEW
Main response uses gzip; brotli would be ~20% smaller
Info::
i
Main HTML response uses gzip (brotli would be ~20% smaller)
All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.
B
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
No Cache-Control header on main HTML response
Info::
i
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
i
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
✓
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
✓
No resource hint issues
A+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
✓
LCP image preload audit not available for this scan
A
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Warning::
!
Compressed response missing `Vary` header
The page is served with `Content-Encoding: gzip` but has no `Vary` header. Without `Vary: Accept-Encoding`, intermediary caches (corporate proxies, ISP caches) may serve the compressed variant to clients that didn't send the matching `Accept-Encoding` -- the client sees garbled bytes. Add `Vary: Accept-Encoding` whenever the response is conditionally compressed.
Info::
✓
Both `ETag` and `Last-Modified` present -- efficient revalidation supported
The page returns both `ETag` (content hash) and `Last-Modified` (timestamp) headers. Browsers can issue conditional GETs with `If-None-Match` or `If-Modified-Since`; the server returns 304 Not Modified for unchanged content, saving bandwidth. ETag is the more reliable of the two (timestamps fail in DST transitions and clock skew).
Network Waterfall
79 requests over 5979ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
783 ms
3.9 s
4.7 s
5.5 s
6.3 s