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
114 images, 0 KB saveable
REVIEW
114 images, 0 KB saveable
Warning::
!
https://www.wikihow.com/extensions/wikihow/homepag... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/homepag... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/homepag... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/homepag... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/homepag... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/Partner... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/courses... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/QuizArt... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/Partner... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/homepag... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/NameGen... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/homepag... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/homepag... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/Partner... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/homepag... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/homepag... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/homepag... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/homepag... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/homepag... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/homepag... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/homepag... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/homepag... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/categor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/homepag... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/Partner... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wikihow.com/extensions/wikihow/Partner... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
114images2.2 MB
0oversized-0 KB
51legacy format
48missing 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
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 (168 KB)
PASS
3 fonts (168 KB)
Info::
i
3 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
3
168 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
flUhRq6tzZclQEJ-Vdg-Iui...woff2swap
Size126 KB
Load time129 ms
Start1.0 s
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
memvYaGs126MiZpBA-UvWbX...woff2swap
Size42 KB
Load time108 ms
Start1.0 s
RiskFOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX...woff2swap
Size0 KB
Load time107 ms
Start1.0 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)
Fixing the unchecked items could save ~63 KB and ~126 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
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: Axis12 Ltd
Network Waterfall
124 requests over 1333ms
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-party3724ms · 828KB · €65/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.wikihow.com
www.wikihow.com
Other
1124ms
73 KB
—
€20/mo
Costly
Unattributable
Unattributable
Other
686ms
0 KB
—
€12/mo
Costly
www.wikihow.com
www.wikihow.com
Other
509ms
310 KB
43%
€9/mo
Costly
www.wikihow.com
www.wikihow.com
Other
441ms
23 KB
—
€8/mo
Costly
fundingchoicesmessages.google.com
fundingchoicesmessages.google.com
Other
329ms
67 KB
—
€6/mo
Costly
fundingchoicesmessages.google.com
fundingchoicesmessages.google.com
Other
252ms
70 KB
50%
€4/mo
Costly
apis.google.com
apis.google.com
Other
204ms
108 KB
68%
€4/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
114ms
155 KB
40%
€2/mo
Optional
Google Analytics
www.google-analytics.com
Analytics
63ms
21 KB
—
€1/mo
Optional
www.wikihow.com
Other
Costly
Execution1124ms
Transfer73 KB
Monthly Cost€20/mo
Unattributable
Other
Costly
Execution686ms
Transfer0 KB
Monthly Cost€12/mo
www.wikihow.com
Other
Costly
Execution509ms
Transfer310 KB
Unused43%
Monthly Cost€9/mo
www.wikihow.com
Other
Costly
Execution441ms
Transfer23 KB
Monthly Cost€8/mo
fundingchoicesmessages.google.com
Other
Costly
Execution329ms
Transfer67 KB
Monthly Cost€6/mo
fundingchoicesmessages.google.com
Other
Costly
Execution252ms
Transfer70 KB
Unused50%
Monthly Cost€4/mo
apis.google.com
Other
Costly
Execution204ms
Transfer108 KB
Unused68%
Monthly Cost€4/mo
Google Tag Manager
Tag Manager
Optional
Execution114ms
Transfer155 KB
Unused40%
Monthly Cost€2/mo
Google Analytics
Analytics
Optional
Execution63ms
Transfer21 KB
Monthly Cost€1/mo
These scripts may cost more than they're worth
www.wikihow.com adds 1124ms and costs ~€20/month
Unattributable adds 686ms and costs ~€12/month
www.wikihow.com adds 509ms and costs ~€9/month
www.wikihow.com adds 441ms and costs ~€8/month
fundingchoicesmessages.google.com adds 329ms and costs ~€6/month
fundingchoicesmessages.google.com adds 252ms and costs ~€4/month
apis.google.com adds 204ms 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.wikihow.com takes 1124ms 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 686ms 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.wikihow.com takes 509ms 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.wikihow.com takes 441ms 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
fundingchoicesmessages.google.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
fundingchoicesmessages.google.com takes 252ms 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
apis.google.com takes 204ms 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
68% of apis.google.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.
375 ms
750 ms
1.1 s
1.5 s