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https://brave.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
92
GRADE
A
FIX
2
REVIEW
2
PASS
11
INFO
2

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

Mobile Desktop
89
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
93
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
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.

1.99 s

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

3.04 s

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

173 ms

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

0.066

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

1.99 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.

4.18 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
11 PASS 2 REVIEW 2 FIX
D
JS Execution Cost
Action
2080ms total JS execution
FIX
2080ms total JS execution
Warning::
https://brave.com/js/lottie-player.f8a02068d6eea90...: 590ms CPU time
Warning::
https://brave.com/: 576ms CPU time
Warning::
Unattributable: 492ms CPU time
Warning::
https://brave.com/js/tabs.4422877367929b6c6bcf6f97...: 364ms CPU time
Info::
https://brave.com/js/navigation.dfd1f44125a1e31a3a...: 59ms CPU time
Info::
Third-party scripts: 492ms (24% of total)

Main Thread Breakdown

Script Evaluation 36% Other 30% Style & Layout 23% Garbage Collection 5%
ScriptTotalScriptingParse/CompileParty
https://brave.com/js/lottie-player.f8a02068d6eea9045634f798c4ae07cd41599d1b02684c0d700f7306f9aeca49.js590ms339ms1ms1st
https://brave.com/576ms31ms1ms1st
Unattributable492ms76ms0ms3rd
https://brave.com/js/tabs.4422877367929b6c6bcf6f974a9d2943058b06cf9af5f3a28847e83e24f56f9e.js364ms268ms0ms1st
https://brave.com/js/navigation.dfd1f44125a1e31a3a0643daa3596bf331980a9e11a925abbb8231ee99e7bf40.js59ms4ms1ms1st
D
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
Info::
Last-Modified header present

No Cache-Control header

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

C
Image Optimization
Action
21 images, 0 KB saveable
REVIEW
21 images, 0 KB saveable
Warning::
https://brave.com/home-assets/images/app-illustrat... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://brave.com/static-assets/images/brave-logo.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://brave.com/static-assets/images/brave-logo-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
21 images 80 KB
0 oversized -0 KB
21 legacy format
3 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

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+
Page Weight Budget
521 KB transferred, 54 requests
PASS
521 KB transferred, 54 requests
Info::
Page weighs 2.2 MB (521 KB transferred)
Info::
54 HTTP requests
Info::
Estimated 0.11 g CO2 per page load
521 KB / 2.4 MB budget
521 KB transferred
54 requests
0.11 g CO2 per page load
JavaScript 168.2 KiB 32%
Fonts 134.5 KiB 26%
Images 79.7 KiB 15%
CSS 53.3 KiB 10%
Other 46.4 KiB 9%
HTML 22.5 KiB 4%
Other 16.4 KiB 3%
Other 365 B 0%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
0% third-party, 0 ms blocking
PASS
0% third-party, 0 ms blocking
Info::
Third-party code accounts for 0% of page weight (365 B of 521.4 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
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 (134 KB)
PASS
7 fonts (134 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

134 KB total

Render-blocking

0

of 7

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s FCP 2.0 s LCP 3.0 shttps://brave.com/static-assets/fonts/FlechaM/FlechaM-Medium.woff2FlechaM-Medium.woff2 https://brave.com/static-assets/fonts/FlechaM/FlechaM-Medium.woff2 — 42.7 KiB — 58 ms — font-display: swaphttps://brave.com/static-assets/fonts/poppins/poppins-latin-600-normal.woff2poppins-latin-600-norma... https://brave.com/static-assets/fonts/poppins/poppins-latin-600-normal.woff2 — 9.0 KiB — 50 ms — font-display: swaphttps://brave.com/static-assets/fonts/poppins/poppins-latin-400-normal.woff2poppins-latin-400-norma... https://brave.com/static-assets/fonts/poppins/poppins-latin-400-normal.woff2 — 8.9 KiB — 52 ms — font-display: swaphttps://brave.com/static-assets/fonts/inter/inter-latin-wght-normal.woff2inter-latin-wght-normal... https://brave.com/static-assets/fonts/inter/inter-latin-wght-normal.woff2 — 48.5 KiB — 56 ms — font-display: swaphttps://brave.com/static-assets/fonts/poppins/poppins-latin-600-italic.woff2poppins-latin-600-itali... https://brave.com/static-assets/fonts/poppins/poppins-latin-600-italic.woff2 — 9.7 KiB — 52 ms — font-display: swaphttps://brave.com/static-assets/fonts/poppins/poppins-latin-700-normal.woff2poppins-latin-700-norma... https://brave.com/static-assets/fonts/poppins/poppins-latin-700-normal.woff2 — 8.8 KiB — 29 ms — font-display: swaphttps://brave.com/static-assets/fonts/poppins/poppins-latin-ext-400-normal.woff2poppins-latin-ext-400-n... https://brave.com/static-assets/fonts/poppins/poppins-latin-ext-400-normal.woff2 — 6.7 KiB — 29 ms — font-display: swap
FlechaM-Medium.woff2 woff2 swap
Size 43 KB
Load time 58 ms
Start 259 ms
Risk FOUT — text flashes from fallback to web font
poppins-latin-600-norma... woff2 swap
Size 9 KB
Load time 50 ms
Start 259 ms
Risk FOUT — text flashes from fallback to web font
poppins-latin-400-norma... woff2 swap
Size 9 KB
Load time 52 ms
Start 259 ms
Risk FOUT — text flashes from fallback to web font
inter-latin-wght-normal... woff2 swap
Size 49 KB
Load time 56 ms
Start 261 ms
Risk FOUT — text flashes from fallback to web font
poppins-latin-600-itali... woff2 swap
Size 10 KB
Load time 52 ms
Start 262 ms
Risk FOUT — text flashes from fallback to web font
poppins-latin-700-norma... woff2 swap
Size 9 KB
Load time 29 ms
Start 376 ms
Risk FOUT — text flashes from fallback to web font
poppins-latin-ext-400-n... woff2 swap
Size 7 KB
Load time 29 ms
Start 383 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+
JS Bundles
17 scripts, 21 KB unused
PASS
17 scripts, 21 KB unused
Warning::
https://brave.com/js/lottie-player.f8a02068d6eea90...: 21 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 21 KB
21 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://brave.com/js/lottie-player.f8a02068d6eea9045634f798c4ae07cd41599d1b02684c0d700f7306f9aeca49.js47 KB21 KB (47%)✓1st
https://brave.com/js/3-delay-animations.52117dc3caa2efe969d724cfc404c3360109e18b1ae4bc3d8883cc9b85ecfae4.js1 KB—✓1st
https://brave.com/js/5-set-download-urls.b5c47076524cf6c338c6950c01ce3274cf8c020b1b79393c504606c280171dbb.js3 KB—✓1st
https://brave.com/static-assets/js/analysis.js3 KB—✓1st
https://brave.com/matomo.js26 KB—✓1st
https://brave.com/js/brave-search-widget.961e53a4365debef5ed2bac4c11380ca7396d2eb351e0a9186156a6144abaaef.js66 KB—✓1st
https://brave.com/js/localization.eac6ebe6b760650c196b5ce8eb0033649e2db78efb2b4b36d8516f384c7a1114.min.js2 KB—✓1st
https://brave.com/js/set-platform.a4b5c2cf36a94e5497142976e089e61ddf9a6d0c32d31f609e1372832c5f1d32.min.js2 KB—✓1st
https://brave.com/js/card-carousel.717a7c5436ba434620e1d4b02317402f5169f01926dff3a2871663404390d1d8.js2 KB—✓1st
https://brave.com/js/4-details-summary-animation.2b2cb643f1890d8e7d4a6ec3c0d85e5982aa58a156b2362b0d84b09841668db5.js2 KB—✓1st

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

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
3 hints, 0 missing preconnects
PASS
3 hints, 0 missing preconnects
Info::
Page uses 3 resource hint(s)

Current Resource Hints

preconnect
3
preload
—
dns-prefetch
—
prefetch
—

3 resource hints configured

A+
Page Weight Inventory
54 resources · 521 KB · 21 KB savings available
PASS
54 resources · 521 KB · 21 KB savings available
Info::
Within 1MB page-weight target
Got: 521 KB
Info::
1 third-party resources (0% of weight)
54 resources · 521.4 KiB · 1 third-party Within 1MB page-weight target
JavaScript 32% · 168.2 KiB
Font 26% · 134.5 KiB
Image 18% · 96.1 KiB
CSS 10% · 53.3 KiB
Other 9% · 46.8 KiB
Document 4% · 22.5 KiB

~21.5 KiB of savings available

Remove unused JavaScript: 21.5 KiB
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
54 requests over 658ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 2.0 s LCP 3.0 shttps://brave.com// https://brave.com/ — 200 — 22.5 KiB — 92 ms — h2https://brave.com/static-assets/js/ie-shims.js/static-assets/js/ie-shims.js https://brave.com/static-assets/js/ie-shims.js — 200 — 2.0 KiB — 29 ms — h2https://brave.com/js/localization.eac6ebe6b760650c196b5ce8eb0033649e2db78efb2b4b36d8516f384c7a1114.min.js/js/localization.eac6ebe6b760650c19... https://brave.com/js/localization.eac6ebe6b760650c196b5ce8eb0033649e2db78efb2b4b36d8516f384c7a1114.min.js — 200 — 2.3 KiB — 29 ms — h2https://brave.com/static-assets/css/main.min.c8824155f25efe59900d713982ce1d801d219e4ea5fdcd131ea75eafe2c5a541.css/static-assets/css/main.min.c882415... https://brave.com/static-assets/css/main.min.c8824155f25efe59900d713982ce1d801d219e4ea5fdcd131ea75eafe2c5a541.css — 200 — 41.5 KiB — 67 ms — h2https://brave.com/static-assets/css/fonts-latin.min.e207b9357b68ec783b0e1f403686906eb346848ac6a311fca5bf053703866d3a.css/static-assets/css/fonts-latin.min.... https://brave.com/static-assets/css/fonts-latin.min.e207b9357b68ec783b0e1f403686906eb346848ac6a311fca5bf053703866d3a.css — 200 — 2.1 KiB — 45 ms — h2https://brave.com/js/set-platform.a4b5c2cf36a94e5497142976e089e61ddf9a6d0c32d31f609e1372832c5f1d32.min.js/js/set-platform.a4b5c2cf36a94e5497... https://brave.com/js/set-platform.a4b5c2cf36a94e5497142976e089e61ddf9a6d0c32d31f609e1372832c5f1d32.min.js — 200 — 1.8 KiB — 46 ms — h2https://brave.com/static-assets/js/analysis.js/static-assets/js/analysis.js https://brave.com/static-assets/js/analysis.js — 200 — 2.9 KiB — 92 ms — h2https://brave.com/matomo.js/matomo.js https://brave.com/matomo.js — 200 — 25.7 KiB — 43 ms — h2https://brave.com/static-assets/images/brave-logo-sans-text.svg/static-assets/images/brave-logo-sa... https://brave.com/static-assets/images/brave-logo-sans-text.svg — 200 — 3.1 KiB — 91 ms — h2https://brave.com/static-assets/images/brave-logo-text-only.svg/static-assets/images/brave-logo-te... https://brave.com/static-assets/images/brave-logo-text-only.svg — 200 — 2.6 KiB — 91 ms — h2https://brave.com/js/brave-search-widget.961e53a4365debef5ed2bac4c11380ca7396d2eb351e0a9186156a6144abaaef.js/js/brave-search-widget.961e53a4365... https://brave.com/js/brave-search-widget.961e53a4365debef5ed2bac4c11380ca7396d2eb351e0a9186156a6144abaaef.js — 200 — 65.7 KiB — 80 ms — h2https://brave.com/js/lottie-player.f8a02068d6eea9045634f798c4ae07cd41599d1b02684c0d700f7306f9aeca49.js/js/lottie-player.f8a02068d6eea9045... https://brave.com/js/lottie-player.f8a02068d6eea9045634f798c4ae07cd41599d1b02684c0d700f7306f9aeca49.js — 200 — 47.0 KiB — 88 ms — h2https://brave.com/js/card-carousel.717a7c5436ba434620e1d4b02317402f5169f01926dff3a2871663404390d1d8.js/js/card-carousel.717a7c5436ba43462... https://brave.com/js/card-carousel.717a7c5436ba434620e1d4b02317402f5169f01926dff3a2871663404390d1d8.js — 200 — 1.9 KiB — 43 ms — h2https://brave.com/home-assets/images/line-waves.svg/home-assets/images/line-waves.svg https://brave.com/home-assets/images/line-waves.svg — 200 — 2.1 KiB — 30 ms — h3https://brave.com/home-assets/images/leo-illustration.svg/home-assets/images/leo-illustratio... https://brave.com/home-assets/images/leo-illustration.svg — 200 — 5.7 KiB — 31 ms — h3https://brave.com/home-assets/images/vpn-illustration.svg/home-assets/images/vpn-illustratio... https://brave.com/home-assets/images/vpn-illustration.svg — 200 — 7.5 KiB — 39 ms — h3https://brave.com/home-assets/images/app-illustration.svg/home-assets/images/app-illustratio... https://brave.com/home-assets/images/app-illustration.svg — 200 — 22.8 KiB — 90 ms — h3https://brave.com/static-assets/images/brave-logo.svg/static-assets/images/brave-logo.sv... https://brave.com/static-assets/images/brave-logo.svg — 200 — 3.1 KiB — 88 ms — h3https://brave.com/static-assets/icons/close-icon.svg/static-assets/icons/close-icon.svg https://brave.com/static-assets/icons/close-icon.svg — 200 — 1.5 KiB — 71 ms — h3https://brave.com/static-assets/images/interstitial-download-qr.png/static-assets/images/interstitial-... https://brave.com/static-assets/images/interstitial-download-qr.png — 200 — 3.5 KiB — 71 ms — h3https://brave.com/js/3-delay-animations.52117dc3caa2efe969d724cfc404c3360109e18b1ae4bc3d8883cc9b85ecfae4.js/js/3-delay-animations.52117dc3caa2... https://brave.com/js/3-delay-animations.52117dc3caa2efe969d724cfc404c3360109e18b1ae4bc3d8883cc9b85ecfae4.js — 200 — 1.4 KiB — 65 ms — h3https://brave.com/js/4-details-summary-animation.2b2cb643f1890d8e7d4a6ec3c0d85e5982aa58a156b2362b0d84b09841668db5.js/js/4-details-summary-animation.2b2... https://brave.com/js/4-details-summary-animation.2b2cb643f1890d8e7d4a6ec3c0d85e5982aa58a156b2362b0d84b09841668db5.js — 200 — 2.0 KiB — 87 ms — h3https://brave.com/js/5-set-download-urls.b5c47076524cf6c338c6950c01ce3274cf8c020b1b79393c504606c280171dbb.js/js/5-set-download-urls.b5c47076524... https://brave.com/js/5-set-download-urls.b5c47076524cf6c338c6950c01ce3274cf8c020b1b79393c504606c280171dbb.js — 200 — 3.3 KiB — 70 ms — h3https://brave.com/js/dev.730af03ea8ceb4d931331d7b8b5624ffabb540a8ce32625c718017c593720e4d.js/js/dev.730af03ea8ceb4d931331d7b8b5... https://brave.com/js/dev.730af03ea8ceb4d931331d7b8b5624ffabb540a8ce32625c718017c593720e4d.js — 200 — 1.9 KiB — 70 ms — h3https://brave.com/js/image-comparison-slider.024d5546db2bcf149a9c680bbc79536c7295c511c6e5afb76f7d563653d0a51e.js/js/image-comparison-slider.024d554... https://brave.com/js/image-comparison-slider.024d5546db2bcf149a9c680bbc79536c7295c511c6e5afb76f7d563653d0a51e.js — 200 — 1.7 KiB — 86 ms — h3https://brave.com/js/interstitial.ed54a6886dab8f7e38d1a18b72dd8100d64ccad1cb0094f216a5d86ebb5313f4.js/js/interstitial.ed54a6886dab8f7e38... https://brave.com/js/interstitial.ed54a6886dab8f7e38d1a18b72dd8100d64ccad1cb0094f216a5d86ebb5313f4.js — 200 — 1.8 KiB — 82 ms — h3https://brave.com/js/navigation.dfd1f44125a1e31a3a0643daa3596bf331980a9e11a925abbb8231ee99e7bf40.js/js/navigation.dfd1f44125a1e31a3a06... https://brave.com/js/navigation.dfd1f44125a1e31a3a0643daa3596bf331980a9e11a925abbb8231ee99e7bf40.js — 200 — 3.2 KiB — 87 ms — h3https://brave.com/js/preserve-query-params.40023c3d4fc7197ee3f7968de9352345f03a8c930cb52ce520eaef790703f46f.js/js/preserve-query-params.40023c3d4... https://brave.com/js/preserve-query-params.40023c3d4fc7197ee3f7968de9352345f03a8c930cb52ce520eaef790703f46f.js — 200 — 1.8 KiB — 68 ms — h3https://brave.com/js/tabs.4422877367929b6c6bcf6f974a9d2943058b06cf9af5f3a28847e83e24f56f9e.js/js/tabs.4422877367929b6c6bcf6f974a... https://brave.com/js/tabs.4422877367929b6c6bcf6f974a9d2943058b06cf9af5f3a28847e83e24f56f9e.js — 200 — 1.9 KiB — 69 ms — 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
24% of JavaScript execution is third-party
First-party Third-party 492ms · 0KB · €1/mo
Unattributable
Other
Costly
Execution 492ms
Transfer 0 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 492ms and costs ~€1/month

Unattributable takes 492ms 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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