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https://brave.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
92
GRADE
A
FIX
1
REVIEW
3
PASS
9
INFO
2

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

Mobile Desktop
98
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
88
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.
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.

799 ms

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

969 ms

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

16 ms

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

0.006

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

799 ms

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

1.46 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
15
9 PASS 3 REVIEW 1 FIX
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
24 images, 0 KB saveable
REVIEW
24 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/icons/close-icon.s... 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/interstitia... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
24 images 84 KB
0 oversized -0 KB
24 legacy format
5 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

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

B
JS Execution Cost
674ms total JS execution
REVIEW
674ms total JS execution
Warning::
https://brave.com/: 254ms CPU time
Info::
https://brave.com/js/lottie-player.f8a02068d6eea90...: 216ms CPU time
Info::
Unattributable: 123ms CPU time
Info::
https://brave.com/js/tabs.4422877367929b6c6bcf6f97...: 81ms CPU time
Info::
Third-party scripts: 123ms (18% of total)

Main Thread Breakdown

Other 30% Script Evaluation 28% Style & Layout 24% Rendering 13% Garbage Collection 3%
ScriptTotalScriptingParse/CompileParty
https://brave.com/254ms9ms0ms1st
https://brave.com/js/lottie-player.f8a02068d6eea9045634f798c4ae07cd41599d1b02684c0d700f7306f9aeca49.js216ms89ms0ms1st
Unattributable123ms14ms0ms3rd
https://brave.com/js/tabs.4422877367929b6c6bcf6f974a9d2943058b06cf9af5f3a28847e83e24f56f9e.js81ms62ms0ms1st
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
524 KB transferred, 57 requests
PASS
524 KB transferred, 57 requests
Info::
Page weighs 2.3 MB (524 KB transferred)
Info::
57 HTTP requests
Info::
Estimated 0.11 g CO2 per page load
524 KB / 2.4 MB budget
524 KB transferred
57 requests
0.11 g CO2 per page load
JavaScript 167.2 KiB 32%
Fonts 134.5 KiB 26%
Images 83.9 KiB 16%
CSS 53.0 KiB 10%
Other 46.2 KiB 9%
HTML 22.4 KiB 4%
Other 16.4 KiB 3%
Other 363 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 (363 B of 523.9 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 500 ms 1.0 s FCP 799 ms LCP 969 mshttps://brave.com/static-assets/fonts/FlechaM/FlechaM-Medium.woff2FlechaM-Medium.woff2 https://brave.com/static-assets/fonts/FlechaM/FlechaM-Medium.woff2 — 42.7 KiB — 39 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 — 38 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 — 38 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 — 38 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 — 38 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 — 38 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 — 30 ms — font-display: swap
FlechaM-Medium.woff2 woff2 swap
Size 43 KB
Load time 39 ms
Start 319 ms
Risk FOUT — text flashes from fallback to web font
poppins-latin-600-norma... woff2 swap
Size 9 KB
Load time 38 ms
Start 320 ms
Risk FOUT — text flashes from fallback to web font
poppins-latin-400-norma... woff2 swap
Size 9 KB
Load time 38 ms
Start 320 ms
Risk FOUT — text flashes from fallback to web font
inter-latin-wght-normal... woff2 swap
Size 49 KB
Load time 38 ms
Start 321 ms
Risk FOUT — text flashes from fallback to web font
poppins-latin-600-itali... woff2 swap
Size 10 KB
Load time 38 ms
Start 321 ms
Risk FOUT — text flashes from fallback to web font
poppins-latin-700-norma... woff2 swap
Size 9 KB
Load time 38 ms
Start 321 ms
Risk FOUT — text flashes from fallback to web font
poppins-latin-ext-400-n... woff2 swap
Size 7 KB
Load time 30 ms
Start 347 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Page Weight Inventory
57 resources · 524 KB · 21 KB savings available
PASS
57 resources · 524 KB · 21 KB savings available
Info::
Within 1MB page-weight target
Got: 524 KB
Info::
1 third-party resources (0% of weight)
57 resources · 523.9 KiB · 1 third-party Within 1MB page-weight target
JavaScript 32% · 167.2 KiB
Font 26% · 134.5 KiB
Image 19% · 100.3 KiB
CSS 10% · 53.0 KiB
Other 9% · 46.6 KiB
Document 4% · 22.4 KiB

~21.5 KiB of savings available

Remove unused JavaScript: 21.5 KiB
Network Waterfall
57 requests over 601ms
INFO
0 ms 500 ms 1.0 s FCP 799 ms LCP 969 mshttps://brave.com// https://brave.com/ — 200 — 22.4 KiB — 90 ms — h3https://brave.com/static-assets/js/ie-shims.js/static-assets/js/ie-shims.js https://brave.com/static-assets/js/ie-shims.js — 200 — 1.9 KiB — 34 ms — h3https://brave.com/js/localization.eac6ebe6b760650c196b5ce8eb0033649e2db78efb2b4b36d8516f384c7a1114.min.js/js/localization.eac6ebe6b760650c19... https://brave.com/js/localization.eac6ebe6b760650c196b5ce8eb0033649e2db78efb2b4b36d8516f384c7a1114.min.js — 200 — 2.2 KiB — 39 ms — h3https://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 — 41.4 KiB — 39 ms — h3https://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 — 2.0 KiB — 34 ms — h3https://brave.com/js/set-platform.a4b5c2cf36a94e5497142976e089e61ddf9a6d0c32d31f609e1372832c5f1d32.min.js/js/set-platform.a4b5c2cf36a94e5497... https://brave.com/js/set-platform.a4b5c2cf36a94e5497142976e089e61ddf9a6d0c32d31f609e1372832c5f1d32.min.js — 200 — 1.6 KiB — 39 ms — h3https://brave.com/static-assets/js/analysis.js/static-assets/js/analysis.js https://brave.com/static-assets/js/analysis.js — 200 — 2.7 KiB — 46 ms — h3https://brave.com/matomo.js/matomo.js https://brave.com/matomo.js — 200 — 25.5 KiB — 58 ms — h3https://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 — 2.9 KiB — 49 ms — h3https://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 — 2.5 KiB — 47 ms — h3https://brave.com/js/brave-search-widget.961e53a4365debef5ed2bac4c11380ca7396d2eb351e0a9186156a6144abaaef.js/js/brave-search-widget.961e53a4365... https://brave.com/js/brave-search-widget.961e53a4365debef5ed2bac4c11380ca7396d2eb351e0a9186156a6144abaaef.js — 200 — 65.6 KiB — 68 ms — h3https://brave.com/js/lottie-player.f8a02068d6eea9045634f798c4ae07cd41599d1b02684c0d700f7306f9aeca49.js/js/lottie-player.f8a02068d6eea9045... https://brave.com/js/lottie-player.f8a02068d6eea9045634f798c4ae07cd41599d1b02684c0d700f7306f9aeca49.js — 200 — 46.9 KiB — 65 ms — h3https://brave.com/js/card-carousel.717a7c5436ba434620e1d4b02317402f5169f01926dff3a2871663404390d1d8.js/js/card-carousel.717a7c5436ba43462... https://brave.com/js/card-carousel.717a7c5436ba434620e1d4b02317402f5169f01926dff3a2871663404390d1d8.js — 200 — 1.8 KiB — 49 ms — h3https://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 — 29 ms — h3https://analytics.brave.com/piwik.php?action_name=The%20browser%20that%20puts%20you%20first%20%7C%20Brave&idsite=2&rec=1&r=787080&h=17&m=30&s=29&url=https%3A%2F%2Fbrave.com%2F&_id=&_idn=1&send_image=0&_refts=0&dimension1=en-US&dimension2=en-US&pv_id=jW97NR&pf_net=60&pf_srv=29&pf_tfr=3&uadata=%7B%22formFactors%22%3A%5B%22Desktop%22%5D%2C%22fullVersionList%22%3A%5B%7B%22brand%22%3A%22Chromium%22%2C%22version%22%3A%22147.0.7727.55%22%7D%2C%7B%22brand%22%3A%22Not.A%2FBrand%22%2C%22version%22%3A%228.0.0.0%22%7D%5D%2C%22mobile%22%3Afalse%2C%22model%22%3A%22%22%2C%22platform%22%3A%22macOS%22%2C%22platformVersion%22%3A%2210.15.7%22%7D&pdf=1&qt=0&realp=0&wma=0&fla=0&java=0&ag=0&cookie=1&res=800x600analytics.brave.com/piwik.php?actio... https://analytics.brave.com/piwik.php?action_name=The%20browser%20that%20puts%20you%20first%20%7C%20Brave&idsite=2&rec=1&r=787080&h=17&m=30&s=29&url=https%3A%2F%2Fbrave.com%2F&_id=&_idn=1&send_image=0&_refts=0&dimension1=en-US&dimension2=en-US&pv_id=jW97NR&pf_net=60&pf_srv=29&pf_tfr=3&uadata=%7B%22formFactors%22%3A%5B%22Desktop%22%5D%2C%22fullVersionList%22%3A%5B%7B%22brand%22%3A%22Chromium%22%2C%22version%22%3A%22147.0.7727.55%22%7D%2C%7B%22brand%22%3A%22Not.A%2FBrand%22%2C%22version%22%3A%228.0.0.0%22%7D%5D%2C%22mobile%22%3Afalse%2C%22model%22%3A%22%22%2C%22platform%22%3A%22macOS%22%2C%22platformVersion%22%3A%2210.15.7%22%7D&pdf=1&qt=0&realp=0&wma=0&fla=0&java=0&ag=0&cookie=1&res=800x600 — 204 — 363 B — 171 ms — h2https://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 — 34 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 — 57 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 — 49 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 — 48 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 — 36 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 — 49 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 — 54 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 — 48 ms — h3https://brave.com/js/dev.730af03ea8ceb4d931331d7b8b5624ffabb540a8ce32625c718017c593720e4d.js/js/dev.730af03ea8ceb4d931331d7b8b5... https://brave.com/js/dev.730af03ea8ceb4d931331d7b8b5624ffabb540a8ce32625c718017c593720e4d.js — 200 — 1.9 KiB — 49 ms — h3https://brave.com/js/image-comparison-slider.024d5546db2bcf149a9c680bbc79536c7295c511c6e5afb76f7d563653d0a51e.js/js/image-comparison-slider.024d554... 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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
18% of JavaScript execution is third-party
First-party Third-party 123ms · 0KB · €0/mo
Unattributable
Other
Optional
Execution 123ms
Transfer 0 KB
Monthly Cost €0/mo

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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