https://truecloud.nl/wp-content/uploads/go-x/u/082... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://truecloud.nl/wp-content/uploads/go-x/u/bf8... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://truecloud.nl/wp-content/uploads/go-x/u/65a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://truecloud.nl/wp-content/uploads/go-x/u/baa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://truecloud.nl/wp-content/uploads/go-x/u/12c... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://truecloud.nl/wp-content/uploads/go-x/u/de3... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://truecloud.nl/wp-content/uploads/go-x/u/a20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://truecloud.nl/wp-content/uploads/go-x/u/cc4... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://truecloud.nl/wp-content/uploads/go-x/u/365... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
11images2.4 MB
0oversized-0 KB
11legacy format
9missing 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
B
JS Execution Cost
509ms total JS execution
REVIEW
509ms total JS execution
Warning::
!
Unattributable: 253ms CPU time
Info::
i
gox-script-2-js-after: 132ms CPU time
Info::
i
https://truecloud.nl/: 124ms CPU time
Info::
i
Third-party scripts: 124ms (24% of total)
Main Thread Breakdown
Other 47% Style & Layout 25% Script Evaluation 13% Parse HTML & CSS 10%
Script
Total
Scripting
Parse/Compile
Party
Unattributable
253ms
5ms
0ms
1st
gox-script-2-js-after
132ms
10ms
0ms
1st
https://truecloud.nl/
124ms
15ms
10ms
3rd
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.
C
Document Compression
Action
Document response served uncompressed
REVIEW
Document response served uncompressed
Info::
i
Main HTML response has no Content-Encoding (uncompressed)
The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.
B
Asset Compression
1 of 1 asset host serve text uncompressed
REVIEW
1 of 1 asset host serve text uncompressed
Warning::
!
truecloud.nl serves text assets uncompressed (assets: 20)
The sampled response carries a text content type but no Content-Encoding, so the bytes go over the wire raw. Text compression typically removes 70-80% of a JS or CSS payload -- this is the single cheapest transfer win available on this host.
Got: truecloud.nl (text/css)
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.
B
HTTP Caching
no-cache
REVIEW
no-cache
Info::
✓
Cache-Control header is set
Got: no-cache
Info::
i
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
no-cache
Directive
Value
Meaning
no-cache
—
Cache but always revalidate first
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 (110 KB)
PASS
5 fonts (110 KB)
Info::
i
5 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
5
110 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
Poppins-latin_latin-ext...woffswap
Size14 KB
Load time38 ms
Start602 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
OpenSans-latin_latin-ex...woffswap
Size24 KB
Load time39 ms
Start602 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
Poppins-latin_latin-ext...woffswap
Size14 KB
Load time41 ms
Start602 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
OpenSans-latin_latin-ex...woffswap
Size23 KB
Load time43 ms
Start603 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
Merriweather-latin_lati...woffswap
Size35 KB
Load time42 ms
Start603 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
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)
Fixing the unchecked items could save ~33 KB and ~66 ms
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+
Main HTML Cache-Control
Main HTML uses no-cache -- safe revalidate-on-request policy
PASS
Main HTML uses no-cache -- safe revalidate-on-request policy
Info::
✓
Main HTML uses no-cache -- safe revalidate-on-request policy
Got: no-cache
A+
Server Response Intelligence
1 server-response signal(s) detected
PASS
1 server-response signal(s) detected
Info::
i
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
✓
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A+
JavaScript Blocking
No render-blocking JS or document.write usage detected
PASS
No render-blocking JS or document.write usage detected
Info::
✓
No JavaScript blocking issues detected
A
CSS Performance Depth
1 CSS depth issue(s) detected
PASS
1 CSS depth issue(s) detected
Warning::
!
68 `@font-face` rule(s) without `font-display` -- causes FOIT
An `@font-face` rule without `font-display` causes Flash of Invisible Text (FOIT): the browser hides the styled text for up to 3 seconds while the custom font downloads, then either swaps to fallback (Chrome / Firefox) or stays invisible (older Safari). Add `font-display: swap` (shows fallback immediately, swaps in the custom font when ready) or `font-display: optional` (uses fallback if the font isn't ready in 100ms; never causes visible swap). Either eliminates FOIT outright.
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: IONOS SE
Network Waterfall
31 requests over 752ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers