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
44 images, 0 KB saveable
REVIEW
44 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.
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.
44images433 KB
0oversized-0 KB
44legacy format
19missing 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
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 (240 KB)
PASS
6 fonts (240 KB)
Info::
i
6 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
6
240 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
683ffc9a2aa1aa6187af000...woffswap
Size43 KB
Load time33 ms
Start433 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
683ffdc79f974545ccaa636...woffswap
Size43 KB
Load time37 ms
Start434 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
67f7e38acef4cde59aad2db...woff2swap
Size46 KB
Load time70 ms
Start434 ms
RiskFOUT — text flashes from fallback to web font
68307cdc375ef1f7780a28f...woff2swap
Size31 KB
Load time55 ms
Start436 ms
RiskFOUT — text flashes from fallback to web font
67f8d804c21dd81402c67d2...woff2swap
Size31 KB
Load time84 ms
Start437 ms
RiskFOUT — text flashes from fallback to web font
UcC73FwrK3iLTeHuS_nVMrM...woff2swap
Size47 KB
Load time34 ms
Start462 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
No optimization needed
PASS
No optimization needed
Info::
✓
No resource hint issues
Network Waterfall
131 requests over 42297ms
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-party5082ms · 1366KB · €88/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
cdn.prod.website-files.com
cdn.prod.website-files.com
Other
1855ms
52 KB
—
€32/mo
Costly
fast.wistia.com
fast.wistia.com
Other
1034ms
162 KB
49%
€18/mo
Costly
Unattributable
Unattributable
Other
616ms
0 KB
—
€11/mo
Costly
www.typeform.com
www.typeform.com
Other
566ms
230 KB
—
€10/mo
Costly
fast.wistia.com
fast.wistia.com
Other
342ms
159 KB
54%
€6/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
161ms
174 KB
36%
€3/mo
Optional
cdn.prod.website-files.com
cdn.prod.website-files.com
Other
125ms
18 KB
—
€2/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
92ms
172 KB
40%
€2/mo
Optional
OneTrust
cdn.cookielaw.org
Consent
82ms
120 KB
53%
€1/mo
Essential
cdn.prod.website-files.com
cdn.prod.website-files.com
Other
80ms
1 KB
—
€1/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
66ms
145 KB
44%
€1/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
63ms
132 KB
46%
€1/mo
Optional
cdn.prod.website-files.com
Other
Costly
Execution1855ms
Transfer52 KB
Monthly Cost€32/mo
fast.wistia.com
Other
Costly
Execution1034ms
Transfer162 KB
Unused49%
Monthly Cost€18/mo
Unattributable
Other
Costly
Execution616ms
Transfer0 KB
Monthly Cost€11/mo
www.typeform.com
Other
Costly
Execution566ms
Transfer230 KB
Monthly Cost€10/mo
fast.wistia.com
Other
Costly
Execution342ms
Transfer159 KB
Unused54%
Monthly Cost€6/mo
Google Tag Manager
Tag Manager
Optional
Execution161ms
Transfer174 KB
Unused36%
Monthly Cost€3/mo
cdn.prod.website-files.com
Other
Optional
Execution125ms
Transfer18 KB
Monthly Cost€2/mo
Google Tag Manager
Tag Manager
Optional
Execution92ms
Transfer172 KB
Unused40%
Monthly Cost€2/mo
OneTrust
Consent
Essential
Execution82ms
Transfer120 KB
Unused53%
Monthly Cost€1/mo
cdn.prod.website-files.com
Other
Optional
Execution80ms
Transfer1 KB
Monthly Cost€1/mo
Google Tag Manager
Tag Manager
Optional
Execution66ms
Transfer145 KB
Unused44%
Monthly Cost€1/mo
Google Tag Manager
Tag Manager
Optional
Execution63ms
Transfer132 KB
Unused46%
Monthly Cost€1/mo
These scripts may cost more than they're worth
cdn.prod.website-files.com adds 1855ms and costs ~€32/month
fast.wistia.com adds 1034ms and costs ~€18/month
Unattributable adds 616ms and costs ~€11/month
www.typeform.com adds 566ms and costs ~€10/month
fast.wistia.com adds 342ms and costs ~€6/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 1855ms 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 1034ms 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 616ms 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 566ms 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 342ms 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
54% 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
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.