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https://www.squarespace.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
66
GRADE
D
FIX
5
REVIEW
2
PASS
5
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
55
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
73
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.11 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

2.01 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

600 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.000

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

6.28 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

5.54 s

Page Load Progression

2.5 s
5.0 s
7.5 s
10.0 s
12.5 s
15.0 s
17.5 s
20.0 s
Checks
14
5 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
7.8 MB transferred, 163 requests
FIX
7.8 MB transferred, 163 requests
Critical::
Page weighs 16.0 MB (7.8 MB transferred)
Warning::
JavaScript is 2.5 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.5 MB
Warning::
Images are 1.7 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.7 MB
Info::
Fonts are 265 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 265 KB
Warning::
163 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.6 g CO2 per page load
7.8 MB / 2.4 MB budget
7.8 MB transferred
163 requests
1.6 g CO2 per page load
Other 3.2 MiB 41%
JavaScript 2.5 MiB 31%
Images 1.7 MiB 22%
Fonts 264.7 KiB 3%
HTML 89.6 KiB 1%
Other 66.6 KiB 1%
CSS 22.8 KiB 0%
Other 10.1 KiB 0%
Other 4.7 KiB 0%
Other 718 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
Third-Party Impact
Action
92% third-party, 0 ms blocking
FIX
92% third-party, 0 ms blocking
Warning::
Third-party code accounts for 92% of page weight (7.2 MiB of 7.8 MiB)
Info::
Third-party blocking time is low (0 ms)
92%
First-party Third-party
F
JS Execution Cost
Action
10678ms total JS execution
FIX
10678ms total JS execution
Warning::
https://static1.squarespace.com/static/ta/5134cbef...: 7097ms CPU time
Warning::
https://www.squarespace.com/: 1593ms CPU time
Warning::
Unattributable: 904ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-BCC...: 258ms CPU time
Info::
https://www.squarespace.com/scripts/chunks/3387.js: 245ms CPU time
Warning::
Third-party scripts: 8839ms (83% of total)

Main Thread Breakdown

Other 43% Script Evaluation 35% Style & Layout 13% Rendering 4% Script Parsing & Compilation 3%
ScriptTotalScriptingParse/CompileParty
https://static1.squarespace.com/static/ta/5134cbefe4b0c6fb04df8065/13236/scripts/pages/homepage/default/index.js7097ms2669ms87ms3rd
https://www.squarespace.com/1593ms11ms4ms1st
Unattributable904ms51ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-BCCP258ms207ms26ms3rd
https://www.squarespace.com/scripts/chunks/3387.js245ms153ms58ms1st
https://www.googletagmanager.com/gtag/destination?id=AW-1012071506&cx=c&gtm=4e6411152ms139ms12ms3rd
https://www.googletagmanager.com/gtag/js?id=G-1L8CXRNJCG&cx=c&gtm=4e641197ms74ms22ms3rd
https://connect.facebook.net/signals/config/1407587539516826?v=2.9.291&r=stable&domain=www.squarespace.com&hme=295b1b33901e14aeab879c0b58f907ef4d5f44fdd19814310771af911c5f6ac8&ex_m=102%2C198%2C147%2C22%2C70%2C71%2C139%2C66%2C65%2C11%2C155%2C88%2C16%2C132%2C124%2C37%2C73%2C76%2C130%2C152%2C157%2C8%2C4%2C5%2C7%2C6%2C3%2C89%2C99%2C158%2C163%2C212%2C60%2C179%2C180%2C53%2C267%2C30%2C72%2C224%2C223%2C222%2C23%2C32%2C101%2C59%2C10%2C61%2C95%2C96%2C97%2C103%2C127%2C31%2C29%2C129%2C126%2C125%2C148%2C74%2C151%2C149%2C150%2C48%2C58%2C120%2C15%2C154%2C43%2C254%2C255%2C253%2C26%2C27%2C28%2C46%2C140%2C75%2C110%2C18%2C20%2C42%2C38%2C40%2C39%2C81%2C90%2C94%2C108%2C138%2C141%2C44%2C109%2C24%2C21%2C116%2C67%2C35%2C143%2C142%2C144%2C135%2C133%2C25%2C34%2C57%2C107%2C153%2C68%2C17%2C145%2C112%2C79%2C64%2C19%2C83%2C84%2C113%2C82%2C33%2C284%2C205%2C194%2C195%2C193%2C287%2C279%2C50%2C206%2C105%2C128%2C78%2C118%2C52%2C45%2C47%2C111%2C117%2C123%2C56%2C62%2C51%2C54%2C98%2C156%2C1%2C121%2C14%2C119%2C12%2C2%2C55%2C91%2C63%2C115%2C87%2C86%2C159%2C160%2C92%2C93%2C9%2C122%2C100%2C49%2C136%2C85%2C77%2C69%2C114%2C104%2C41%2C137%2C0%2C80%2C131%2C134%2C146%2C36%2C106%2C13%2C161%2C221%2C220%2C215%2C217%2C218%2C219%2C216%2C204%2C214%2C186%2C183%2C184%2C178%2C182%2C185%2C181%2C176%2C307%2C269%2C189%2C208%2C177%2C175%2C227%2C199%2C169%2C170%2C165%2C171%2C168%2C166%2C167%2C164%2C162%2C173%2C174%2C172%2C256%2C306%2C18795ms90ms3ms3rd
https://static1.squarespace.com/static/ta/5134cbefe4b0c6fb04df8065/13236/scripts/globals/performance.js88ms50ms9ms3rd
https://www.googletagmanager.com/gtag/js?id=DC-9658484&cx=c&gtm=4e641177ms64ms12ms3rd

Showing top 10 of 11 scripts

F
JS Bundles
Action
37 scripts, 955 KB unused
FIX
37 scripts, 955 KB unused
Warning::
https://www.squarespace.com/scripts/chunks/3387.js: 368 KB unused (67%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static1.squarespace.com/static/ta/5134cbef...: 130 KB unused (24%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-1L8C...: 67 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assets.squarespace.com/universal/scripts-c...: 60 KB unused (100%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/destination?...: 60 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 955 KB
955 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.squarespace.com/scripts/chunks/3387.js545 KB368 KB (67%)✓1st
https://static1.squarespace.com/static/ta/5134cbefe4b0c6fb04df8065/13236/scripts/pages/homepage/default/index.js548 KB130 KB (24%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-1L8CXRNJCG&cx=c&gtm=4e6411169 KB67 KB (40%)✓3rd
https://assets.squarespace.com/universal/scripts-compressed/extract-css-moment-js-vendor-6f2a1f6ec9a41489-min.en-US.js60 KB60 KB (100%)✓3rd
https://www.googletagmanager.com/gtag/destination?id=AW-1012071506&cx=c&gtm=4e6411143 KB60 KB (42%)✓3rd
https://www.googletagmanager.com/gtag/js?id=DC-9658484&cx=c&gtm=4e6411130 KB58 KB (45%)✓3rd
https://www.googletagmanager.com/gtag/js?id=DC-8103537&cx=c&gtm=4e6411130 KB53 KB (41%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-BCCP188 KB45 KB (24%)✓3rd
https://connect.facebook.net/en_US/fbevents.js95 KB33 KB (35%)✓3rd
https://assets.squarespace.com/universal/scripts-compressed/user-account-core-1d75f367a379d0ed-min.en-US.js32 KB32 KB (99%)✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.
Info::
ETag present — enables conditional (304) responses

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Image Optimization
46 images, 0 KB saveable
REVIEW
46 images, 0 KB saveable
Warning::
https://consent.trustarc.com/get?name=privacy_choi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
46 images 1.7 MB
0 oversized -0 KB
10 legacy format
1 missing dimensions CLS 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

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
5 fonts (265 KB)
PASS
5 fonts (265 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

265 KB total

Render-blocking

0

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.1 s LCP 2.0 shttps://media-www.sqspcdn.com/fonts/clarkson-500.woff2clarkson-500.woff2 https://media-www.sqspcdn.com/fonts/clarkson-500.woff2 — 41.8 KiB — 0 ms — font-display: swaphttps://media-www.sqspcdn.com/fonts/clarkson-400.woff2clarkson-400.woff2 https://media-www.sqspcdn.com/fonts/clarkson-400.woff2 — 40.5 KiB — 0 ms — font-display: swaphttps://media-www.sqspcdn.com/fonts/clarkson-300.woff2clarkson-300.woff2 https://media-www.sqspcdn.com/fonts/clarkson-300.woff2 — 40.5 KiB — 0 ms — font-display: swaphttps://media-www.sqspcdn.com/fonts/clarkson-serif-400.woff2clarkson-serif-400.woff2 https://media-www.sqspcdn.com/fonts/clarkson-serif-400.woff2 — 71.0 KiB — 0 ms — font-display: swaphttps://media-www.sqspcdn.com/fonts/clarkson-serif-300.woff2clarkson-serif-300.woff2 https://media-www.sqspcdn.com/fonts/clarkson-serif-300.woff2 — 70.8 KiB — 0 ms — font-display: swap
clarkson-500.woff2 woff2 swap
Size 42 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
clarkson-400.woff2 woff2 swap
Size 41 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
clarkson-300.woff2 woff2 swap
Size 41 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
clarkson-serif-400.woff2 woff2 swap
Size 71 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
clarkson-serif-300.woff2 woff2 swap
Size 71 KB
Load time 0 ms
Start 0 ms
Risk FOUT — 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
Network Waterfall
163 requests over 0ms
INFO

Performance analysis not available for this result.

Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
83% of JavaScript execution is third-party
First-party Third-party 8839ms · 1290KB · $51/mo
static1.squarespace.com
Other
Costly
Execution 7097ms
Transfer 548 KB
Unused 24%
Monthly Cost $41/mo
Unattributable
Other
Costly
Execution 904ms
Transfer 0 KB
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Costly
Execution 258ms
Transfer 188 KB
Unused 24%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 152ms
Transfer 143 KB
Unused 42%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 97ms
Transfer 169 KB
Unused 40%
Monthly Cost $1/mo
Facebook Pixel
Advertising
Optional
Execution 95ms
Transfer 16 KB
Monthly Cost $1/mo
static1.squarespace.com
Other
Optional
Execution 88ms
Transfer 23 KB
Monthly Cost $0/mo
Google Tag Manager
Tag Manager
Optional
Execution 77ms
Transfer 130 KB
Unused 45%
Monthly Cost $0/mo
static1.squarespace.com
Other
Optional
Execution 72ms
Transfer 73 KB
Unused 41%
Monthly Cost $0/mo

These scripts may cost more than they're worth

  • static1.squarespace.com adds 7097ms and costs ~$41/month
  • Unattributable adds 904ms and costs ~$5/month
  • Google Tag Manager adds 258ms and costs ~$1/month

83% 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

static1.squarespace.com takes 7097ms 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 904ms 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 258ms 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

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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