Intentional for dynamic content, but increases server load for every page view.
Got: no-store, max-age=0
Info::
i
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
no-store, max-age=0
Directive
Value
Meaning
no-store
—
Never cache this response
max-age
0
Cache for 0 seconds
B
Image Optimization
17 images, 0 KB saveable
REVIEW
17 images, 0 KB saveable
Info::
✓
All images are well-optimized
17images923 KB
0oversized-0 KB
11legacy format
0missing dimensionsCLS risk
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW
Green Hosting
No green hosting detected
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
6 fonts (527 KB)
PASS
6 fonts (527 KB)
Info::
i
6 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
6
527 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
wk-icons-open.woffwoffswap
Size71 KB
Load time55 ms
Start611 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
wk-icons-filled.woffwoffswap
Size38 KB
Load time79 ms
Start612 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
FiraSans-Regular.woff2woff2swap
Size127 KB
Load time102 ms
Start858 ms
RiskFOUT — text flashes from fallback to web font
Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
FiraSans-Medium.woff2woff2swap
Size130 KB
Load time88 ms
Start859 ms
RiskFOUT — text flashes from fallback to web font
Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
FiraSans-Light.woff2woff2swap
Size127 KB
Load time110 ms
Start859 ms
RiskFOUT — text flashes from fallback to web font
Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size34 KB
Load time66 ms
Start2.4 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)
Fixing the unchecked items could save ~225 KB and ~450 ms
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
8 hints, 0 missing preconnects
PASS
8 hints, 0 missing preconnects
Info::
✓
Page uses 8 resource hint(s)
Current Resource Hints
preconnect
5
preload
3
dns-prefetch—
prefetch—
8 resource hints configured
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
Network Waterfall
56 requests over 2629ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100%of JavaScript execution is third-party
First-party Third-party5152ms · 1167KB · €82/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.wolterskluwer.com
www.wolterskluwer.com
Other
990ms
4 KB
—
€16/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
909ms
190 KB
37%
€15/mo
Costly
www.wolterskluwer.com
www.wolterskluwer.com
Other
872ms
28 KB
—
€14/mo
Costly
Unattributable
Unattributable
Other
790ms
0 KB
—
€13/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
462ms
153 KB
39%
€7/mo
Costly
www.wolterskluwer.com
www.wolterskluwer.com
Other
338ms
265 KB
70%
€5/mo
Costly
www.gstatic.com
www.gstatic.com
Other
273ms
0 KB
49%
€4/mo
Costly
OneTrust
cdn.cookielaw.org
Consent
265ms
120 KB
52%
€4/mo
Essential
www.wolterskluwer.com
www.wolterskluwer.com
Other
170ms
215 KB
81%
€3/mo
Optional
www.wolterskluwer.com
www.wolterskluwer.com
Other
82ms
192 KB
—
€1/mo
Optional
www.wolterskluwer.com
Other
Costly
Execution990ms
Transfer4 KB
Monthly Cost€16/mo
Google Tag Manager
Tag Manager
Costly
Execution909ms
Transfer190 KB
Unused37%
Monthly Cost€15/mo
www.wolterskluwer.com
Other
Costly
Execution872ms
Transfer28 KB
Monthly Cost€14/mo
Unattributable
Other
Costly
Execution790ms
Transfer0 KB
Monthly Cost€13/mo
Google Tag Manager
Tag Manager
Costly
Execution462ms
Transfer153 KB
Unused39%
Monthly Cost€7/mo
www.wolterskluwer.com
Other
Costly
Execution338ms
Transfer265 KB
Unused70%
Monthly Cost€5/mo
www.gstatic.com
Other
Costly
Execution273ms
Transfer0 KB
Unused49%
Monthly Cost€4/mo
OneTrust
Consent
Essential
Execution265ms
Transfer120 KB
Unused52%
Monthly Cost€4/mo
www.wolterskluwer.com
Other
Optional
Execution170ms
Transfer215 KB
Unused81%
Monthly Cost€3/mo
www.wolterskluwer.com
Other
Optional
Execution82ms
Transfer192 KB
Monthly Cost€1/mo
These scripts may cost more than they're worth
www.wolterskluwer.com adds 990ms and costs ~€16/month
Google Tag Manager adds 909ms and costs ~€15/month
www.wolterskluwer.com adds 872ms and costs ~€14/month
Unattributable adds 790ms and costs ~€13/month
Google Tag Manager adds 462ms and costs ~€7/month
www.wolterskluwer.com adds 338ms and costs ~€5/month
www.gstatic.com adds 273ms and costs ~€4/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
Why this matters
When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.
Learn more ▾▴
Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.
Source: web.dev
www.wolterskluwer.com takes 990ms 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
Google Tag Manager takes 909ms 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
www.wolterskluwer.com takes 872ms 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
Unattributable takes 790ms 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
Google Tag Manager takes 462ms 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
www.wolterskluwer.com takes 338ms 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
70% of www.wolterskluwer.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
www.gstatic.com takes 273ms 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
52% of OneTrust'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
81% of www.wolterskluwer.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.