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https://www.1password.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
3
REVIEW
3
PASS
6
INFO
2

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

Mobile Desktop
66
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
99
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
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.

1.02 s

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

1.85 s

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

425 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.

2.66 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.

3.56 s

Page Load Progression

1.9 s
3.7 s
5.6 s
7.5 s
9.3 s
11.2 s
13.1 s
14.9 s
Checks
14
6 PASS 3 REVIEW 3 FIX
F
Page Weight Budget
Action
3.0 MB transferred, 134 requests
FIX
3.0 MB transferred, 134 requests
Warning::
Page weighs 10.7 MB (3.0 MB transferred)
Warning::
JavaScript is 1.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.3 MB
Info::
CSS is 373 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 373 KB
Warning::
134 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.63 g CO2 per page load
3.0 MB / 2.4 MB budget
3.0 MB transferred
134 requests
0.63 g CO2 per page load
JavaScript 1.3 MiB 42%
Other 926.0 KiB 30%
CSS 373.2 KiB 12%
Images 244.5 KiB 8%
HTML 168.9 KiB 5%
Fonts 57.0 KiB 2%
Other 13.1 KiB 0%
Other 2.2 KiB 0%
Other 240 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

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

Source: web.dev

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
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (3.0 MiB of 3.0 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
42316ms total JS execution
FIX
42316ms total JS execution
Warning::
https://1password.com/_next/static/chunks/bc1a11eb...: 39760ms CPU time
Warning::
Unattributable: 898ms CPU time
Warning::
https://1password.com/_next/static/chunks/framewor...: 804ms CPU time
Info::
https://1password.com/: 232ms CPU time
Info::
https://1password.com/_next/static/chunks/pages/%5...: 116ms CPU time
Warning::
Third-party scripts: 42316ms (100% of total)

Main Thread Breakdown

Other 83% Script Evaluation 15%
ScriptTotalScriptingParse/CompileParty
https://1password.com/_next/static/chunks/bc1a11eb-39d6b105a12c9d8e.js?dpl=dpl_3ETtrf6YZYuQAaGKzJ8t6s2P3Pmd39760ms5075ms5ms3rd
Unattributable898ms266ms0ms3rd
https://1password.com/_next/static/chunks/framework-b9fd9bcc3ecde907.js?dpl=dpl_3ETtrf6YZYuQAaGKzJ8t6s2P3Pmd804ms511ms7ms3rd
https://1password.com/232ms1ms0ms3rd
https://1password.com/_next/static/chunks/pages/%5B%5B...slug%5D%5D-e8c27fe4287662cf.js?dpl=dpl_3ETtrf6YZYuQAaGKzJ8t6s2P3Pmd116ms116ms0ms3rd
https://1password.com/_next/static/css/776567fbd6210af8.css?dpl=dpl_3ETtrf6YZYuQAaGKzJ8t6s2P3Pmd81ms0ms0ms3rd
https://transcend-cdn.com/cm/fa619274-3c15-4155-bbec-c0cb75733259/ui.js74ms58ms13ms3rd
https://1password.com/_next/static/chunks/pages/_app-b5117911cac3e570.js?dpl=dpl_3ETtrf6YZYuQAaGKzJ8t6s2P3Pmd65ms45ms20ms3rd
https://1password.com/_next/static/chunks/main-27d7eeb94db5f181.js?dpl=dpl_3ETtrf6YZYuQAaGKzJ8t6s2P3Pmd63ms56ms7ms3rd
https://1password.com/6si.min.js63ms56ms2ms3rd

Showing top 10 of 13 scripts

B
Image Optimization
42 images, 0 KB saveable
REVIEW
42 images, 0 KB saveable
Info::
All images are well-optimized
42 images 244 KB
0 oversized -0 KB
31 legacy format
0 missing dimensions CLS risk
C
JS Bundles
Action
44 scripts, 285 KB unused
REVIEW
44 scripts, 285 KB unused
Warning::
https://1password.com/_next/static/chunks/1380-23d...: 64 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://1password.com/_next/static/chunks/pages/_a...: 44 KB unused (33%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://transcend-cdn.com/cm/fa619274-3c15-4155-bb...: 38 KB unused (38%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://1password.com/_next/static/chunks/3171-baa...: 32 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://1password.com/_next/static/chunks/6563-54a...: 31 KB unused (65%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 285 KB
285 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://1password.com/_next/static/chunks/1380-23d45b7c0830f5df.js?dpl=dpl_3ETtrf6YZYuQAaGKzJ8t6s2P3Pmd137 KB64 KB (48%)✓3rd
https://1password.com/_next/static/chunks/pages/_app-b5117911cac3e570.js?dpl=dpl_3ETtrf6YZYuQAaGKzJ8t6s2P3Pmd137 KB44 KB (33%)✓3rd
https://transcend-cdn.com/cm/fa619274-3c15-4155-bbec-c0cb75733259/ui.js99 KB38 KB (38%)✓3rd
https://1password.com/_next/static/chunks/3171-baaca19acadc507b.js?dpl=dpl_3ETtrf6YZYuQAaGKzJ8t6s2P3Pmd63 KB32 KB (54%)✓3rd
https://1password.com/_next/static/chunks/6563-54aa583b2aa4597d.js?dpl=dpl_3ETtrf6YZYuQAaGKzJ8t6s2P3Pmd50 KB31 KB (65%)✓3rd
https://1password.com/_next/static/chunks/4064-c74433f99dc46b66.js?dpl=dpl_3ETtrf6YZYuQAaGKzJ8t6s2P3Pmd63 KB30 KB (49%)✓3rd
https://1password.com/_next/static/chunks/3447-687e2c50eea3ba65.js?dpl=dpl_3ETtrf6YZYuQAaGKzJ8t6s2P3Pmd66 KB26 KB (41%)✓3rd
https://transcend-cdn.com/cm/fa619274-3c15-4155-bbec-c0cb75733259/airgap.js53 KB20 KB (39%)✓3rd
https://1password.com/_next/static/chunks/6246.25d99a1e87dc3e57.js?dpl=dpl_3ETtrf6YZYuQAaGKzJ8t6s2P3Pmd5 KB—✓3rd
https://1password.com/_next/static/chunks/6307.0ea24fcfa26fdf0c.js?dpl=dpl_3ETtrf6YZYuQAaGKzJ8t6s2P3Pmd4 KB—✓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

B
HTTP Caching
public, max-age=0, must-revalidate
REVIEW
public, max-age=0, must-revalidate
Info::
Cache-Control header is set
Got: public, max-age=0, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

public, max-age=0, must-revalidate

DirectiveValueMeaning
public—Any cache may store this response
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
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
2 fonts (57 KB)
PASS
2 fonts (57 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

57 KB total

Render-blocking

0

of 2

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 FCP 1.0 s LCP 1.9 shttps://1password.com/_next/static/media/9e5180a7add93a09-s.p.woff29e5180a7add93a09-s.p.woff2 https://1password.com/_next/static/media/9e5180a7add93a09-s.p.woff2 — 29.6 KiB — 0 ms — font-display: swaphttps://1password.com/_next/static/media/bee40e69b0eb6902-s.p.woff2bee40e69b0eb6902-s.p.woff2 https://1password.com/_next/static/media/bee40e69b0eb6902-s.p.woff2 — 27.4 KiB — 0 ms — font-display: swap
9e5180a7add93a09-s.p.woff2 woff2 swap
Size 30 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
bee40e69b0eb6902-s.p.woff2 woff2 swap
Size 27 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
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
134 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
100% of JavaScript execution is third-party
First-party Third-party 42316ms · 1097KB · €677/mo
1password.com
Other
Costly
Execution 39760ms
Transfer 42 KB
Monthly Cost €636/mo
Unattributable
Other
Costly
Execution 898ms
Transfer 0 KB
Monthly Cost €14/mo
1password.com
Other
Costly
Execution 804ms
Transfer 48 KB
Monthly Cost €13/mo
1password.com
Other
Costly
Execution 232ms
Transfer 166 KB
Monthly Cost €4/mo
1password.com
Other
Optional
Execution 116ms
Transfer 4 KB
Monthly Cost €2/mo
1password.com
Other
Optional
Execution 81ms
Transfer 366 KB
Monthly Cost €1/mo
transcend-cdn.com
Other
Optional
Execution 74ms
Transfer 99 KB
Unused 38%
Monthly Cost €1/mo
1password.com
Other
Optional
Execution 65ms
Transfer 137 KB
Unused 33%
Monthly Cost €1/mo
1password.com
Other
Optional
Execution 63ms
Transfer 42 KB
Monthly Cost €1/mo
1password.com
Other
Optional
Execution 63ms
Transfer 14 KB
Monthly Cost €1/mo
transcend-cdn.com
Other
Optional
Execution 55ms
Transfer 53 KB
Unused 39%
Monthly Cost €1/mo
1password.com
Other
Optional
Execution 54ms
Transfer 64 KB
Monthly Cost €1/mo
1password.com
Other
Optional
Execution 53ms
Transfer 63 KB
Unused 54%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • 1password.com adds 39760ms and costs ~€636/month
  • Unattributable adds 898ms and costs ~€14/month
  • 1password.com adds 804ms and costs ~€13/month
  • 1password.com adds 232ms 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

1password.com takes 39760ms 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 898ms 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

1password.com takes 804ms 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

1password.com takes 232ms 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

54% of 1password.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

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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