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
41 images, 0 KB saveable
REVIEW
41 images, 0 KB saveable
Warning::
!
https://www.alaska.edu/news/images/11-21-technolog... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.alaska.edu/alaska/images/SAF%20Image3.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.alaska.edu/news/images/Alaska%20capito... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://bloximages.newyork1.vip.townnews.com/newsm... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.alaska.edu/news/images/11-21-winter-ca... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.alaska.edu/news/images/2024%20UAF%20co... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.alaska.edu/news/images/workforce-2023.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.alaska.edu/alaska/images/24UNV003-Land... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.alaska.edu/news/images/ANSEP.dunbar.th... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.alaska.edu/_images/Dixie_Coggins_1.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.alaska.edu/alaska/images/University-Al... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.alaska.edu/_resources/images/swlogo.pn... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.ktoo.org/wp-content/uploads/2026/03/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.alaska.edu/alaska/images/UA%20Empower_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.alaska.edu/news/images/field-trip-2023... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.alaska.edu/alaska/images/Teach%20Alask... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.alaska.edu/news/images/2022%20UA%20Fou... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.alaska.edu/news/images/CONOCOPHILLIPS%... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://static.wixstatic.com/media/0df355_cfbe5307... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
41images8.8 MB
0oversized-0 KB
37legacy 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
7 fonts (107 KB)
PASS
7 fonts (107 KB)
Info::
i
7 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
7
107 KB total
Render-blocking
0
of 7
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
pro-fa-solid-900-0.woff2woff2swap
Size12 KB
Load time38 ms
Start2.8 s
RiskFOUT — text flashes from fallback to web font
S6uyw4BMUTPHjx4wXiWtFCc...woff2swap
Size14 KB
Load time29 ms
Start2.8 s
RiskFOUT — text flashes from fallback to web font
pro-fa-regular-400-9.woff2woff2swap
Size24 KB
Load time40 ms
Start2.8 s
RiskFOUT — text flashes from fallback to web font
S6u9w4BMUTPHh6UVSwiPGQ3...woff2swap
Size14 KB
Load time34 ms
Start2.8 s
RiskFOUT — text flashes from fallback to web font
pro-fa-solid-900-13.woff2woff2swap
Size13 KB
Load time42 ms
Start2.8 s
RiskFOUT — text flashes from fallback to web font
pro-fa-solid-900-12.woff2woff2swap
Size16 KB
Load time46 ms
Start2.8 s
RiskFOUT — text flashes from fallback to web font
pro-fa-solid-900-1.woff2woff2swap
Size14 KB
Load time47 ms
Start2.8 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
Network Waterfall
106 requests over 7197ms
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-party3165ms · 1139KB · $42/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
Unattributable
Unattributable
Other
668ms
0 KB
—
$9/mo
Costly
www.alaska.edu
www.alaska.edu
Other
609ms
47 KB
—
$8/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
386ms
158 KB
39%
$5/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
229ms
146 KB
43%
$3/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
189ms
134 KB
45%
$3/mo
Optional
Facebook Pixel
connect.facebook.net
Advertising
159ms
97 KB
36%
$2/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
148ms
155 KB
55%
$2/mo
Optional
Hotjar
script.hotjar.com
Session Replay
127ms
57 KB
66%
$2/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
118ms
125 KB
51%
$2/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
98ms
116 KB
55%
$1/mo
Optional
kit.fontawesome.com
kit.fontawesome.com
Other
95ms
6 KB
—
$1/mo
Optional
Facebook Pixel
connect.facebook.net
Advertising
87ms
45 KB
—
$1/mo
Optional
code.jquery.com
code.jquery.com
Other
87ms
31 KB
—
$1/mo
Optional
Google Analytics
www.google-analytics.com
Analytics
85ms
21 KB
—
$1/mo
Optional
cse.google.com
cse.google.com
Other
79ms
4 KB
—
$1/mo
Optional
Unattributable
Other
Costly
Execution668ms
Transfer0 KB
Monthly Cost$9/mo
www.alaska.edu
Other
Costly
Execution609ms
Transfer47 KB
Monthly Cost$8/mo
Google Tag Manager
Tag Manager
Costly
Execution386ms
Transfer158 KB
Unused39%
Monthly Cost$5/mo
Google Tag Manager
Tag Manager
Costly
Execution229ms
Transfer146 KB
Unused43%
Monthly Cost$3/mo
Google Tag Manager
Tag Manager
Optional
Execution189ms
Transfer134 KB
Unused45%
Monthly Cost$3/mo
Facebook Pixel
Advertising
Optional
Execution159ms
Transfer97 KB
Unused36%
Monthly Cost$2/mo
Google Tag Manager
Tag Manager
Optional
Execution148ms
Transfer155 KB
Unused55%
Monthly Cost$2/mo
Hotjar
Session Replay
Optional
Execution127ms
Transfer57 KB
Unused66%
Monthly Cost$2/mo
Google Tag Manager
Tag Manager
Optional
Execution118ms
Transfer125 KB
Unused51%
Monthly Cost$2/mo
Google Tag Manager
Tag Manager
Optional
Execution98ms
Transfer116 KB
Unused55%
Monthly Cost$1/mo
kit.fontawesome.com
Other
Optional
Execution95ms
Transfer6 KB
Monthly Cost$1/mo
Facebook Pixel
Advertising
Optional
Execution87ms
Transfer45 KB
Monthly Cost$1/mo
code.jquery.com
Other
Optional
Execution87ms
Transfer31 KB
Monthly Cost$1/mo
Google Analytics
Analytics
Optional
Execution85ms
Transfer21 KB
Monthly Cost$1/mo
cse.google.com
Other
Optional
Execution79ms
Transfer4 KB
Monthly Cost$1/mo
These scripts may cost more than they're worth
Unattributable adds 668ms and costs ~$9/month
www.alaska.edu adds 609ms and costs ~$8/month
Google Tag Manager adds 386ms and costs ~$5/month
Google Tag Manager adds 229ms 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
Unattributable takes 668ms 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.alaska.edu takes 609ms 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 386ms 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 229ms 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 Google Tag Manager'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 Hotjar'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
51% of Google Tag Manager'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
55% of Google Tag Manager'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.