https://cdn.prod.website-files.com/6914bc46af7a937... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://cdn.prod.website-files.com/6914bc46af7a937... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
14images116 KB
0oversized-0 KB
10legacy format
3missing 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
Performance issues directly impact user engagement and conversion rates.
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
B
HTTP Caching
private
REVIEW
private
Info::
✓
Cache-Control header is set
Got: private
Info::
i
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
private
Directive
Value
Meaning
private
—
Only browser cache, not CDN/proxy
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
9 fonts (206 KB)
PASS
9 fonts (206 KB)
Info::
i
9 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
9
206 KB total
Render-blocking
0
of 9
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
rP2Yp2ywxg089UriI5-g4vl...woff2swap
Size36 KB
Load time18 ms
Start457 ms
RiskFOUT — text flashes from fallback to web font
aFTR7PB1QTsUX8KYvrGyEYO...woff2swap
Size8 KB
Load time14 ms
Start491 ms
RiskFOUT — text flashes from fallback to web font
697d191a2b5558646f30661...ttfswap
Size26 KB
Load time29 ms
Start492 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
aFTU7PB1QTsUX8KYthqQBK6...woff2swap
Size9 KB
Load time18 ms
Start492 ms
RiskFOUT — text flashes from fallback to web font
aFTR7PB1QTsUX8KYvumzEYO...woff2swap
Size9 KB
Load time22 ms
Start493 ms
RiskFOUT — text flashes from fallback to web font
697d1858ded9448f96ea45d...ttfswap
Size28 KB
Load time31 ms
Start493 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
697d1858aa78bdb91f62782...ttfswap
Size30 KB
Load time34 ms
Start494 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
697d1858f88b71c6bb3f6ee...ttfswap
Size30 KB
Load time48 ms
Start495 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
697d18584b4cf55a578e2b1...ttfswap
Size30 KB
Load time49 ms
Start495 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 ~43 KB and ~86 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
13 hints, 0 missing preconnects
PASS
13 hints, 0 missing preconnects
Info::
✓
Page uses 13 resource hint(s)
Current Resource Hints
preconnect
3
preload
1
dns-prefetch—
prefetch
9
13 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
113 requests over 3824ms
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-party15441ms · 572KB · €168/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.domaintools.com
www.domaintools.com
Other
3099ms
1 KB
—
€34/mo
Costly
jsDelivr
cdn.jsdelivr.net
CDN
3082ms
18 KB
—
€33/mo
Costly
acsbapp.com
acsbapp.com
Other
1938ms
0 KB
53%
€21/mo
Costly
Unattributable
Unattributable
Other
1816ms
0 KB
—
€20/mo
Costly
code-editor-api.sean-82d.workers.dev
code-editor-api.sean-82d.workers.dev
Other
1106ms
2 KB
—
€12/mo
Costly
unpkg
unpkg.com
CDN
1014ms
0 KB
—
€11/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
665ms
160 KB
42%
€7/mo
Costly
jsDelivr
cdn.jsdelivr.net
CDN
483ms
1 KB
—
€5/mo
Costly
jsDelivr
cdn.jsdelivr.net
CDN
464ms
33 KB
—
€5/mo
Costly
d3e54v103j8qbb.cloudfront.net
d3e54v103j8qbb.cloudfront.net
Other
369ms
30 KB
—
€4/mo
Costly
cdn-cookieyes.com
cdn-cookieyes.com
Other
358ms
8 KB
—
€4/mo
Costly
jsDelivr
cdn.jsdelivr.net
CDN
275ms
29 KB
—
€3/mo
Costly
info.domaintools.com
info.domaintools.com
Other
195ms
67 KB
77%
€2/mo
Optional
jsDelivr
cdn.jsdelivr.net
CDN
143ms
158 KB
91%
€2/mo
Optional
jsDelivr
cdn.jsdelivr.net
CDN
113ms
44 KB
66%
€1/mo
Optional
cdn.prod.website-files.com
cdn.prod.website-files.com
Other
97ms
5 KB
—
€1/mo
Optional
challenges.cloudflare.com
challenges.cloudflare.com
Other
82ms
0 KB
—
€1/mo
Optional
cdn-cookieyes.com
cdn-cookieyes.com
Other
80ms
9 KB
—
€1/mo
Optional
ajax.googleapis.com
ajax.googleapis.com
Other
60ms
6 KB
—
€1/mo
Optional
www.domaintools.com
Other
Costly
Execution3099ms
Transfer1 KB
Monthly Cost€34/mo
jsDelivr
CDN
Costly
Execution3082ms
Transfer18 KB
Monthly Cost€33/mo
acsbapp.com
Other
Costly
Execution1938ms
Transfer0 KB
Unused53%
Monthly Cost€21/mo
Unattributable
Other
Costly
Execution1816ms
Transfer0 KB
Monthly Cost€20/mo
code-editor-api.sean-82d.workers.dev
Other
Costly
Execution1106ms
Transfer2 KB
Monthly Cost€12/mo
unpkg
CDN
Costly
Execution1014ms
Transfer0 KB
Monthly Cost€11/mo
Google Tag Manager
Tag Manager
Costly
Execution665ms
Transfer160 KB
Unused42%
Monthly Cost€7/mo
jsDelivr
CDN
Costly
Execution483ms
Transfer1 KB
Monthly Cost€5/mo
jsDelivr
CDN
Costly
Execution464ms
Transfer33 KB
Monthly Cost€5/mo
d3e54v103j8qbb.cloudfront.net
Other
Costly
Execution369ms
Transfer30 KB
Monthly Cost€4/mo
cdn-cookieyes.com
Other
Costly
Execution358ms
Transfer8 KB
Monthly Cost€4/mo
jsDelivr
CDN
Costly
Execution275ms
Transfer29 KB
Monthly Cost€3/mo
info.domaintools.com
Other
Optional
Execution195ms
Transfer67 KB
Unused77%
Monthly Cost€2/mo
jsDelivr
CDN
Optional
Execution143ms
Transfer158 KB
Unused91%
Monthly Cost€2/mo
jsDelivr
CDN
Optional
Execution113ms
Transfer44 KB
Unused66%
Monthly Cost€1/mo
cdn.prod.website-files.com
Other
Optional
Execution97ms
Transfer5 KB
Monthly Cost€1/mo
challenges.cloudflare.com
Other
Optional
Execution82ms
Transfer0 KB
Monthly Cost€1/mo
cdn-cookieyes.com
Other
Optional
Execution80ms
Transfer9 KB
Monthly Cost€1/mo
ajax.googleapis.com
Other
Optional
Execution60ms
Transfer6 KB
Monthly Cost€1/mo
These scripts may cost more than they're worth
www.domaintools.com adds 3099ms and costs ~€34/month
jsDelivr adds 3082ms and costs ~€33/month
acsbapp.com adds 1938ms and costs ~€21/month
Unattributable adds 1816ms and costs ~€20/month
code-editor-api.sean-82d.workers.dev adds 1106ms and costs ~€12/month
unpkg adds 1014ms and costs ~€11/month
Google Tag Manager adds 665ms and costs ~€7/month
jsDelivr adds 483ms and costs ~€5/month
jsDelivr adds 464ms and costs ~€5/month
d3e54v103j8qbb.cloudfront.net adds 369ms and costs ~€4/month
cdn-cookieyes.com adds 358ms and costs ~€4/month
jsDelivr adds 275ms and costs ~€3/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.domaintools.com takes 3099ms 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
jsDelivr takes 3082ms 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
acsbapp.com takes 1938ms 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 acsbapp.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
Unattributable takes 1816ms 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
code-editor-api.sean-82d.workers.dev takes 1106ms 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
unpkg takes 1014ms 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 665ms 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
jsDelivr takes 483ms 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
jsDelivr takes 464ms 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
d3e54v103j8qbb.cloudfront.net takes 369ms 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-cookieyes.com takes 358ms 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
jsDelivr takes 275ms 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
77% of info.domaintools.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
91% of jsDelivr'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
66% of jsDelivr'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.