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
63 images, 0 KB saveable
REVIEW
63 images, 0 KB saveable
Warning::
!
https://assets.skool.com/f/e44528d24bfe4d65b0a4124... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/dfaf48a8162c44ed8c87a2b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/8b659729e5ab48818401523... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/d13d6832bf6842f18171986... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/68ec6c9d8c574dddbb6e8f5... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/37a997125c1a4a7aa2ecbf7... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/73d012bd0d504fda8268410... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/1a18982c15714b0c9703189... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/4e2d7072007543158ce67f6... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/11d42aadfe524607839911d... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/bde3f899a3b34363bdd1f0d... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/26217b36c1664d46b0b7a49... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/44b2fb4fbc424b16b63d610... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/f414cab93f674e8a81d1b09... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/3b7a1972cec44c878ea9a5e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/4316e8792dda4ac288e700b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/cd2a34d889b24066b196ee2... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/4c619d1a1c3647e098a70ec... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/3441ac25cf114288a4fb1d9... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/07d716f9c5ec454d8a6010e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/e02403cf9d9542b4bad78aa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/8e9ad584c78d4390adf716f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/82468358f0ca4a5380a3b01... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/b51c57150c70495899bf4bc... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/d4820176d84c4f69ae570c8... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/69ce3e7cd0174624bd9cd1f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/ef9363470aa64299a27dcd5... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/794184c3ff39411c867b27f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/9f95e7563f3d4ac1a3c73d5... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.skool.com/f/b2946b04c009412b96da7d0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
63images1.2 MB
0oversized-0 KB
62legacy format
30missing 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
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
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
3 fonts (88 KB)
PASS
3 fonts (88 KB)
Info::
i
3 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
3
88 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size37 KB
Load time70 ms
Start2.0 s
RiskFOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size16 KB
Load time41 ms
Start2.0 s
RiskFOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size35 KB
Load time68 ms
Start2.0 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)
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
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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall
137 requests over 5254ms
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-party5340ms · 2721KB · $71/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.skool.com
www.skool.com
Other
879ms
343 KB
69%
$12/mo
Costly
Unattributable
Unattributable
Other
841ms
0 KB
—
$11/mo
Costly
017ae153ccc5.d5a84b81.eu-west-3.token.awswaf.com
017ae153ccc5.d5a84b81.eu-west-3.token.awswaf.com
Other
712ms
502 KB
55%
$9/mo
Costly
017ae153ccc5.edge.sdk.awswaf.com
017ae153ccc5.edge.sdk.awswaf.com
Other
612ms
501 KB
60%
$8/mo
Costly
www.skool.com
www.skool.com
Other
593ms
7 KB
—
$8/mo
Costly
www.skool.com
www.skool.com
Other
504ms
49 KB
—
$7/mo
Costly
www.skool.com
www.skool.com
Other
322ms
159 KB
—
$4/mo
Costly
Stripe
js.stripe.com
Payment
300ms
221 KB
64%
$4/mo
Essential
www.skool.com
www.skool.com
Other
155ms
396 KB
74%
$2/mo
Optional
Facebook Pixel
connect.facebook.net
Advertising
128ms
97 KB
36%
$2/mo
Optional
www.skool.com
www.skool.com
Other
110ms
357 KB
70%
$1/mo
Optional
Facebook Pixel
connect.facebook.net
Advertising
101ms
46 KB
43%
$1/mo
Optional
www.skool.com
www.skool.com
Other
84ms
44 KB
—
$1/mo
Optional
www.skool.com
Other
Costly
Execution879ms
Transfer343 KB
Unused69%
Monthly Cost$12/mo
Unattributable
Other
Costly
Execution841ms
Transfer0 KB
Monthly Cost$11/mo
017ae153ccc5.d5a84b81.eu-west-3.token.awswaf.com
Other
Costly
Execution712ms
Transfer502 KB
Unused55%
Monthly Cost$9/mo
017ae153ccc5.edge.sdk.awswaf.com
Other
Costly
Execution612ms
Transfer501 KB
Unused60%
Monthly Cost$8/mo
www.skool.com
Other
Costly
Execution593ms
Transfer7 KB
Monthly Cost$8/mo
www.skool.com
Other
Costly
Execution504ms
Transfer49 KB
Monthly Cost$7/mo
www.skool.com
Other
Costly
Execution322ms
Transfer159 KB
Monthly Cost$4/mo
Stripe
Payment
Essential
Execution300ms
Transfer221 KB
Unused64%
Monthly Cost$4/mo
www.skool.com
Other
Optional
Execution155ms
Transfer396 KB
Unused74%
Monthly Cost$2/mo
Facebook Pixel
Advertising
Optional
Execution128ms
Transfer97 KB
Unused36%
Monthly Cost$2/mo
www.skool.com
Other
Optional
Execution110ms
Transfer357 KB
Unused70%
Monthly Cost$1/mo
Facebook Pixel
Advertising
Optional
Execution101ms
Transfer46 KB
Unused43%
Monthly Cost$1/mo
www.skool.com
Other
Optional
Execution84ms
Transfer44 KB
Monthly Cost$1/mo
These scripts may cost more than they're worth
www.skool.com adds 879ms and costs ~$12/month
Unattributable adds 841ms and costs ~$11/month
017ae153ccc5.d5a84b81.eu-west-3.token.awswaf.com adds 712ms and costs ~$9/month
017ae153ccc5.edge.sdk.awswaf.com adds 612ms and costs ~$8/month
www.skool.com adds 593ms and costs ~$8/month
www.skool.com adds 504ms and costs ~$7/month
www.skool.com adds 322ms 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.skool.com takes 879ms 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
69% of www.skool.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 841ms 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
017ae153ccc5.d5a84b81.eu-west-3.token.awswaf.com takes 712ms 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
55% of 017ae153ccc5.d5a84b81.eu-west-3.token.awswaf.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
017ae153ccc5.edge.sdk.awswaf.com takes 612ms 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
60% of 017ae153ccc5.edge.sdk.awswaf.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.skool.com takes 593ms 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.skool.com takes 504ms 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.skool.com takes 322ms 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
64% of Stripe'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
74% of www.skool.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
70% of www.skool.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.