Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.
Info::
✓
Last-Modified header present
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
C
Image Optimization
Action
37 images, 0 KB saveable
REVIEW
37 images, 0 KB saveable
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://coldsolutions.com.au/wp-content/uploads/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
37images2.1 MB
0oversized-0 KB
34legacy format
25missing 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
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
JavaScript Blocking
2 JS blocking issue(s) detected
REVIEW
2 JS blocking issue(s) detected
Warning::
!
8 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
Warning::
!
Total JS execution time is 7.7 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
A
Third-Party Impact
26% third-party, 0 ms blocking
PASS
26% third-party, 0 ms blocking
Info::
i
Third-party code accounts for 26% of page weight (942.7 KiB of 3.6 MiB)
Info::
✓
Third-party blocking time is low (0 ms)
74%
26%
First-party Third-party
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
✓
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
5 fonts (116 KB)
PASS
5 fonts (116 KB)
Info::
i
5 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
5
116 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size37 KB
Load time43 ms
Start2.5 s
RiskFOUT — text flashes from fallback to web font
TK3iWkUHHAIjg752GT8Gl-1...woff2swap
Size28 KB
Load time78 ms
Start2.5 s
RiskFOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size16 KB
Load time41 ms
Start2.5 s
RiskFOUT — text flashes from fallback to web font
font-woff;charset=utf-8...woffswap
Size2 KB
Load time144 ms
Start2.5 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size34 KB
Load time28 ms
Start3.5 s
RiskFOUT — text flashes from fallback to web font
Optimization checklist
Preload critical fonts (priority=high)
Use woff2 format for all fonts
Set font-display to swap, optional, or fallback
Subset large fonts (≤100 KB each)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
✓
No caching issues found
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
4 hints, 0 missing preconnects
PASS
4 hints, 0 missing preconnects
Info::
✓
Page uses 4 resource hint(s)
Current Resource Hints
preconnect—
preload—
dns-prefetch
4
prefetch—
4 resource hints configured
A+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
✓
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+
Compression Algorithm
Main response uses brotli
PASS
Main response uses brotli
Info::
✓
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
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-Timing Observability
3 Server-Timing entries advertised
PASS
3 Server-Timing entries advertised
Info::
✓
Server-Timing header advertises 3 timing entries
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
✓
`Vary` header declared: Accept-Encoding
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
✓
`Last-Modified` present -- timestamp-based conditional GET supported
Consider also setting `ETag` for stronger revalidation -- ETags are content hashes that don't suffer from clock-skew or DST issues. Last-Modified alone is functional for conditional GETs and not a bug.
Each `<link rel="stylesheet">` without a non-blocking `media` attribute holds up the first paint. Browsers download all of them before painting any content. Consolidate into 1-2 critical-path stylesheets; defer non-critical CSS via `<link rel="stylesheet" media="print" onload="this.media='all'">` or via the loadCSS pattern; inline above-the-fold CSS in `<style>` to short-circuit the request entirely.
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall
129 requests over 6033ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
33%of JavaScript execution is third-party
First-party Third-party2560ms · 63KB · A$16/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.gstatic.com
www.gstatic.com
Other
1549ms
0 KB
55%
A$10/mo
Costly
bpi.zip.co
bpi.zip.co
Other
956ms
37 KB
—
A$6/mo
Costly
static.zip.co
static.zip.co
Other
55ms
25 KB
—
A$0/mo
Optional
www.gstatic.com
Other
Costly
Execution1549ms
Transfer0 KB
Unused55%
Monthly CostA$10/mo
bpi.zip.co
Other
Costly
Execution956ms
Transfer37 KB
Monthly CostA$6/mo
static.zip.co
Other
Optional
Execution55ms
Transfer25 KB
Monthly CostA$0/mo
These scripts may cost more than they're worth
www.gstatic.com adds 1549ms and costs ~A$10/month
bpi.zip.co adds 956ms and costs ~A$6/month
www.gstatic.com takes 1549ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
55% of www.gstatic.com's code is unused. The script may be loading features you don't use.
Why this matters
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
bpi.zip.co takes 956ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
483 ms
2.4 s
2.9 s
3.4 s
3.9 s