Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
C
Image Optimization
Action
40 images, 0 KB saveable
REVIEW
40 images, 0 KB saveable
Warning::
!
https://cdn.prod.website-files.com/6718da5ecf694c9... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://cdn.prod.website-files.com/6718da5ecf694c9... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://cdn.prod.website-files.com/6718da5ecf694c9... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://cdn.prod.website-files.com/6718da5ecf694c9... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://cdn.prod.website-files.com/6718da5ecf694c9... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://cdn.prod.website-files.com/6718da5ecf694c9... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://cdn.prod.website-files.com/6718da5ecf694c9... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://cdn.prod.website-files.com/6718da5ecf694c9... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://cdn.prod.website-files.com/6718da5ecf694c9... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://cdn.prod.website-files.com/6718da5ecf694c9... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://cdn.prod.website-files.com/6718da5ecf694c9... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://cdn.prod.website-files.com/6718da5ecf694c9... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://cdn.prod.website-files.com/6718da5ecf694c9... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
40images179 KB
0oversized-0 KB
40legacy format
13missing 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
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
5 fonts (209 KB)
PASS
5 fonts (209 KB)
Info::
i
5 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
5
209 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
683ffc9a2aa1aa6187af000...woffswap
Size43 KB
Load time69 ms
Start384 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
68307cdc375ef1f7780a28f...woff2swap
Size31 KB
Load time72 ms
Start384 ms
RiskFOUT — text flashes from fallback to web font
683ffdc79f974545ccaa636...woffswap
Size43 KB
Load time93 ms
Start385 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
67f7e38acef4cde59aad2db...woff2swap
Size46 KB
Load time100 ms
Start385 ms
RiskFOUT — text flashes from fallback to web font
UcC73FwrK3iLTeHuS_nVMrM...woff2swap
Size47 KB
Load time14 ms
Start542 ms
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 ~26 KB and ~52 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
5 hints, 0 missing preconnects
PASS
5 hints, 0 missing preconnects
Info::
✓
Page uses 5 resource hint(s)
Current Resource Hints
preconnect
4
preload—
dns-prefetch
1
prefetch—
5 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
121 requests over 41640ms
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-party17160ms · 1640KB · €298/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
cdn.prod.website-files.com
cdn.prod.website-files.com
Other
6481ms
52 KB
—
€113/mo
Costly
Unattributable
Unattributable
Other
2296ms
0 KB
—
€40/mo
Costly
fast.wistia.com
fast.wistia.com
Other
2253ms
162 KB
49%
€39/mo
Costly
www.typeform.com
www.typeform.com
Other
1672ms
230 KB
—
€29/mo
Costly
fast.wistia.com
fast.wistia.com
Other
1464ms
159 KB
52%
€25/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
620ms
175 KB
36%
€11/mo
Costly
cdn.prod.website-files.com
cdn.prod.website-files.com
Other
471ms
18 KB
—
€8/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
373ms
172 KB
39%
€6/mo
Costly
cdn.prod.website-files.com
cdn.prod.website-files.com
Other
329ms
1 KB
—
€6/mo
Costly
OneTrust
cdn.cookielaw.org
Consent
283ms
120 KB
53%
€5/mo
Essential
Google Tag Manager
www.googletagmanager.com
Tag Manager
268ms
145 KB
43%
€5/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
237ms
132 KB
45%
€4/mo
Costly
d3e54v103j8qbb.cloudfront.net
d3e54v103j8qbb.cloudfront.net
Other
149ms
30 KB
—
€3/mo
Optional
Optimizely
cdn.optimizely.com
A/B Testing
134ms
104 KB
71%
€2/mo
Optional
cdn.prod.website-files.com
cdn.prod.website-files.com
Other
77ms
131 KB
82%
€1/mo
Optional
OneTrust
cdn.cookielaw.org
Consent
53ms
9 KB
—
€1/mo
Essential
cdn.prod.website-files.com
Other
Costly
Execution6481ms
Transfer52 KB
Monthly Cost€113/mo
Unattributable
Other
Costly
Execution2296ms
Transfer0 KB
Monthly Cost€40/mo
fast.wistia.com
Other
Costly
Execution2253ms
Transfer162 KB
Unused49%
Monthly Cost€39/mo
www.typeform.com
Other
Costly
Execution1672ms
Transfer230 KB
Monthly Cost€29/mo
fast.wistia.com
Other
Costly
Execution1464ms
Transfer159 KB
Unused52%
Monthly Cost€25/mo
Google Tag Manager
Tag Manager
Costly
Execution620ms
Transfer175 KB
Unused36%
Monthly Cost€11/mo
cdn.prod.website-files.com
Other
Costly
Execution471ms
Transfer18 KB
Monthly Cost€8/mo
Google Tag Manager
Tag Manager
Costly
Execution373ms
Transfer172 KB
Unused39%
Monthly Cost€6/mo
cdn.prod.website-files.com
Other
Costly
Execution329ms
Transfer1 KB
Monthly Cost€6/mo
OneTrust
Consent
Essential
Execution283ms
Transfer120 KB
Unused53%
Monthly Cost€5/mo
Google Tag Manager
Tag Manager
Costly
Execution268ms
Transfer145 KB
Unused43%
Monthly Cost€5/mo
Google Tag Manager
Tag Manager
Costly
Execution237ms
Transfer132 KB
Unused45%
Monthly Cost€4/mo
d3e54v103j8qbb.cloudfront.net
Other
Optional
Execution149ms
Transfer30 KB
Monthly Cost€3/mo
Optimizely
A/B Testing
Optional
Execution134ms
Transfer104 KB
Unused71%
Monthly Cost€2/mo
cdn.prod.website-files.com
Other
Optional
Execution77ms
Transfer131 KB
Unused82%
Monthly Cost€1/mo
OneTrust
Consent
Essential
Execution53ms
Transfer9 KB
Monthly Cost€1/mo
These scripts may cost more than they're worth
cdn.prod.website-files.com adds 6481ms and costs ~€113/month
Unattributable adds 2296ms and costs ~€40/month
fast.wistia.com adds 2253ms and costs ~€39/month
www.typeform.com adds 1672ms and costs ~€29/month
fast.wistia.com adds 1464ms and costs ~€25/month
Google Tag Manager adds 620ms and costs ~€11/month
cdn.prod.website-files.com adds 471ms and costs ~€8/month
Google Tag Manager adds 373ms and costs ~€6/month
cdn.prod.website-files.com adds 329ms and costs ~€6/month
Google Tag Manager adds 268ms and costs ~€5/month
Google Tag Manager adds 237ms 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
cdn.prod.website-files.com takes 6481ms 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 2296ms 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
fast.wistia.com takes 2253ms 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.typeform.com takes 1672ms 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
fast.wistia.com takes 1464ms 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 fast.wistia.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
Google Tag Manager takes 620ms 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
cdn.prod.website-files.com takes 471ms 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 373ms 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
cdn.prod.website-files.com takes 329ms 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
53% 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
Google Tag Manager takes 268ms 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 237ms 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
71% of Optimizely'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
82% of cdn.prod.website-files.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.