Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Request	Cache TTL	Transfer Size
/maps/api/js?key=AIzaSyAOqwLK442_q7mNhlwr0uPFTxm7rg726a0&...	1800.0 s	178.8 KiB
www.browsealoud.com/modules/3.11.0/6514.ac3cda7a458b82b8b52f.js	0.0 ms	103.5 KiB
www.browsealoud.com/modules/3.11.0/4230.c222ded98d9c6a4219ab.js	0.0 ms	82.5 KiB
/sites/default/files/js/js_4IeZh9lgoJSjXlTsiHVs0ZjMR-afO2...	3600.0 s	102.1 KiB
/sites/default/files/js/js_0s-AviPvXBpDOIvXX7kzsmnu2UA_Pr...	3600.0 s	61.5 KiB
www.browsealoud.com/modules/3.11.0/browsealoud.js	0.0 ms	41.1 KiB
www.browsealoud.com/modules/3.11.0/4916.dd13ed0cd26117b33f9d.js	0.0 ms	30.3 KiB
/themes/custom/uscgov/fonts/source-serif-pro/sourceserifp...	3600.0 s	35.4 KiB
/themes/custom/uscgov/fonts/source-serif-pro/sourceserifp...	3600.0 s	32.1 KiB
/sites/default/files/css/css_6Uea4QJEMxfZP9-BWTXdWWkfLEEo...	3600.0 s	31.6 KiB
/sites/default/files/css/css_Kw4HR5W6qvzhXHEilS014F1-c4R6...	3600.0 s	21.2 KiB
/themes/custom/uscgov/fonts/source-sans-pro/sourcesanspro...	3600.0 s	20.5 KiB
/themes/custom/uscgov/dist/uswds/fonts/source-sans-pro/so...	3600.0 s	20.5 KiB
/themes/custom/uscgov/dist/uswds/fonts/source-sans-pro/so...	3600.0 s	20.3 KiB
www.browsealoud.com/modules/3.11.0/8958.e5e9e59cdcabe236f9bb.js	0.0 ms	16.2 KiB
www.browsealoud.com/modules/3.11.0/5350.726c77f7d8bcf825f96b.js	0.0 ms	15.0 KiB
/themes/custom/uscgov/fonts/source-sans-pro/sourcesanspro...	3600.0 s	16.4 KiB
/themes/custom/uscgov/dist/uswds/fonts/source-sans-pro/so...	3600.0 s	16.4 KiB
www.browsealoud.com/modules/3.11.0/2191.b9fbc2ad4e19a0ccda54.js	0.0 ms	10.0 KiB
dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?	0.0 ms	9.4 KiB
dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js	0.0 ms	4.5 KiB
www.browsealoud.com/modules/3.11.0/910.7cf1fb02feb34f6250ac.js	0.0 ms	3.7 KiB
www.browsealoud.com/modules/3.11.0/740.c7c59a28c7aa37bb0e0b.js	0.0 ms	3.6 KiB
www.browsealoud.com/modules/3.11.0/2586.e20a202fd198b630d9d5.js	0.0 ms	3.5 KiB
script.crazyegg.com/pages/scripts/0088/1379.js	300.0 s	2.7 KiB
i.ytimg.com/vi_webp/fVrb5mHFyvg/default.webp	7200.0 s	3.4 KiB
/sites/default/files/css/css_B6f1_QVSTZz8IPvVMHmuHWVGIcMK...	3600.0 s	3.0 KiB
www.browsealoud.com/plus/scripts/3.1.0/ba.js	0.0 ms	1.9 KiB
/themes/custom/uscgov/components/shared/header/images/men...	3600.0 s	2.0 KiB
/themes/custom/uscgov/components/shared/header/images/tra...	3600.0 s	1.3 KiB
www.uscourts.gov/themes/custom/uscgov/icons/misc/arrow-up.svg	3600.0 s	1.0 KiB
/themes/custom/uscgov/components/shared/primary-menu/imag...	3600.0 s	1.0 KiB
www.uscourts.gov/sites/default/files/icons/people-line-solid.svg	3600.0 s	1018 B
www.uscourts.gov/themes/custom/uscgov/components/shared/header/images/pin.svg	3600.0 s	985 B
www.uscourts.gov/themes/custom/uscgov/dist/uswds/img/us_flag_small.png	3600.0 s	957 B
www.uscourts.gov/sites/default/files/icons/balance-scale.svg	3600.0 s	924 B
www.uscourts.gov/sites/default/files/icons/dollar-sign.svg	3600.0 s	923 B
www.uscourts.gov/themes/custom/uscgov/dist/uswds/img/icon-dot-gov.svg	3600.0 s	886 B
www.uscourts.gov/sites/default/files/icons/linkedin.svg	3600.0 s	868 B
www.uscourts.gov/themes/custom/uscgov/dist/uswds/img/icon-https.svg	3600.0 s	850 B
www.uscourts.gov/sites/default/files/icons/chalkboard-user-solid.svg	3600.0 s	824 B
www.uscourts.gov/sites/default/files/icons/youtube.svg	3600.0 s	815 B
www.uscourts.gov/sites/default/files/icons/folder-open-solid.svg	3600.0 s	815 B
/sites/default/files/google_tag/gtm_khxckx8p/google_tag.s...	3600.0 s	755 B
www.uscourts.gov/sites/default/files/icons/desktop.svg	3600.0 s	742 B
www.uscourts.gov/sites/default/files/icons/x-twitter.svg	3600.0 s	740 B
/themes/custom/uscgov/components/shared/primary-menu/imag...	3600.0 s	739 B
/themes/custom/uscgov/components/uscgov/homepage-hero/ima...	3600.0 s	695 B
/sites/default/files/css/css_TW7DLh5lS_rpyKu5fa5TDcuHwQgb...	3600.0 s	694 B
www.uscourts.gov/themes/custom/uscgov/icons/misc/arrow-right-blue.svg	3600.0 s	668 B
/themes/custom/uscgov/components/uscgov/hero-block-second...	3600.0 s	659 B
/themes/custom/uscgov/components/uscgov/court-finder-bloc...	3600.0 s	654 B
www.uscourts.gov/themes/custom/uscgov/dist/uswds/img/usa-icons/expand_more.svg	3600.0 s	603 B
static.doubleclick.net/instream/ad_status.js	900.0 s	93 B

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Est Savings
/themes/custom/uscgov/dist/uswds/fonts/source-sans-pro/so...	130 ms
/themes/custom/uscgov/dist/uswds/fonts/source-sans-pro/so...	120 ms
/themes/custom/uscgov/dist/uswds/fonts/source-sans-pro/so...	120 ms
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2	40 ms
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBA.woff2	30 ms

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:113.841 source:map[type:text value:[unattributed]]]]

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-0-IMG

nodeLabel: court room

path: 1,HTML,1,BODY,4,DIV,0,DIV,2,DIV,0,DIV,0,PICTURE,4,IMG

selector: div.homepage-hero > div.homepage-hero__background-wrapper > picture > img

snippet: <img loading="eager" width="2000" height="1121" src="https://www.uscourts.gov/sites/default/files/styles/full_page_hero_600/pub…" alt="court room">

HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Protocol
www.uscourts.gov/	http/1.1
/sites/default/files/google_tag/gtm_khxckx8p/google_tag.s...	http/1.1
/sites/default/files/css/css_Kw4HR5W6qvzhXHEilS014F1-c4R6...	http/1.1
/sites/default/files/css/css_B6f1_QVSTZz8IPvVMHmuHWVGIcMK...	http/1.1
/sites/default/files/css/css_6Uea4QJEMxfZP9-BWTXdWWkfLEEo...	http/1.1
/themes/custom/uscgov/fonts/source-sans-pro/sourcesanspro...	http/1.1
/themes/custom/uscgov/fonts/source-sans-pro/sourcesanspro...	http/1.1
/themes/custom/uscgov/fonts/source-serif-pro/sourceserifp...	http/1.1
/themes/custom/uscgov/fonts/source-serif-pro/sourceserifp...	http/1.1
www.uscourts.gov/themes/custom/uscgov/dist/uswds/img/us_flag_small.png	http/1.1
www.uscourts.gov/themes/custom/uscgov/dist/uswds/img/icon-dot-gov.svg	http/1.1
www.uscourts.gov/themes/custom/uscgov/dist/uswds/img/icon-https.svg	http/1.1
/sites/default/files/styles/site_logo/public/images/2024-...	http/1.1
/sites/default/files/css/css_TW7DLh5lS_rpyKu5fa5TDcuHwQgb...	http/1.1
/sites/default/files/styles/full_page_hero_600/public/202...	http/1.1
/sites/default/files/styles/large/public/2025-12/judiciar...	http/1.1
/sites/default/files/js/js_4IeZh9lgoJSjXlTsiHVs0ZjMR-afO2...	http/1.1
/sites/default/files/js/js_0s-AviPvXBpDOIvXX7kzsmnu2UA_Pr...	http/1.1
/themes/custom/uscgov/dist/uswds/fonts/source-sans-pro/so...	http/1.1
www.uscourts.gov/themes/custom/uscgov/dist/uswds/img/usa-icons/expand_more.svg	http/1.1
/themes/custom/uscgov/components/shared/primary-menu/imag...	http/1.1
/themes/custom/uscgov/components/shared/primary-menu/imag...	http/1.1
/themes/custom/uscgov/components/shared/header/images/tra...	http/1.1
www.uscourts.gov/themes/custom/uscgov/components/shared/header/images/pin.svg	http/1.1
/themes/custom/uscgov/components/shared/header/images/men...	http/1.1
/themes/custom/uscgov/components/uscgov/homepage-hero/ima...	http/1.1
/themes/custom/uscgov/components/uscgov/court-finder-bloc...	http/1.1
/themes/custom/uscgov/components/uscgov/hero-block-second...	http/1.1
www.uscourts.gov/sites/default/files/icons/folder-open-solid.svg	http/1.1
www.uscourts.gov/sites/default/files/icons/dollar-sign.svg	http/1.1
www.uscourts.gov/sites/default/files/icons/people-line-solid.svg	http/1.1
www.uscourts.gov/sites/default/files/icons/chalkboard-user-solid.svg	http/1.1
www.uscourts.gov/sites/default/files/icons/balance-scale.svg	http/1.1
www.uscourts.gov/sites/default/files/icons/desktop.svg	http/1.1
www.uscourts.gov/themes/custom/uscgov/icons/misc/arrow-up.svg	http/1.1
www.uscourts.gov/sites/default/files/icons/x-twitter.svg	http/1.1
www.uscourts.gov/sites/default/files/icons/youtube.svg	http/1.1
www.uscourts.gov/sites/default/files/icons/linkedin.svg	http/1.1
/themes/custom/uscgov/dist/uswds/fonts/source-sans-pro/so...	http/1.1
/themes/custom/uscgov/dist/uswds/fonts/source-sans-pro/so...	http/1.1
www.uscourts.gov/themes/custom/uscgov/icons/misc/arrow-right-blue.svg	http/1.1
www.uscourts.gov/sitewide_alert/load	http/1.1
www.uscourts.gov/themes/custom/uscgov/favicon.ico	http/1.1

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.

title: Preconnected origins

description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.

title: Preconnect candidates

value: No additional origins are good candidates for preconnecting

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size	Duration
/sites/default/files/css/css_6Uea4QJEMxfZP9-BWTXdWWkfLEEo...	31.6 KiB	909 ms
/sites/default/files/css/css_Kw4HR5W6qvzhXHEilS014F1-c4R6...	21.2 KiB	608 ms
/sites/default/files/css/css_B6f1_QVSTZz8IPvVMHmuHWVGIcMK...	3.0 KiB	608 ms

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Resource Size	Est Savings
court room `div.homepage-hero > div.homepage-hero__background-wrapper > picture > img`	/sites/default/files/styles/full_page_hero_600/public/202...	22.0 KiB	9.4 KiB

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 787 ms

URL	Time Spent
uscourts.gov/	787 ms
www.uscourts.gov/	0.0 ms

Keep the server response time for the main document short because all other requests depend on it. Learn more about the Time to First Byte metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 587 ms

URL	Time Spent
www.uscourts.gov/	687 ms

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 150 ms 64.7 KiB

URL	Transfer Size	Est Savings
/sites/default/files/css/css_6Uea4QJEMxfZP9-BWTXdWWkfLEEo...	31.2 KiB	27.6 KiB
/sites/default/files/css/css_Kw4HR5W6qvzhXHEilS014F1-c4R6...	20.7 KiB	20.5 KiB
#__ba_launchpad { font-size: 10px; } …	18.8 KiB	16.6 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 300 ms 617.6 KiB

URL	Transfer Size	Est Savings
/maps/api/js?key=AIzaSyAOqwLK442_q7mNhlwr0uPFTxm7rg726a0&...	178.5 KiB	98.5 KiB
www.browsealoud.com/modules/3.11.0/4230.c222ded98d9c6a4219ab.js	82.0 KiB	70.0 KiB
/sites/default/files/js/js_4IeZh9lgoJSjXlTsiHVs0ZjMR-afO2...	101.6 KiB	69.7 KiB
www.googletagmanager.com/gtag/js?id=G-83ZBSG354S&cx=c&gtm=4e64h1	151.1 KiB	64.3 KiB
www.googletagmanager.com/gtm.js?id=GTM-KHXCKX8P	133.2 KiB	62.1 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	147.2 KiB	59.7 KiB
/sites/default/files/js/js_0s-AviPvXBpDOIvXX7kzsmnu2UA_Pr...	61.0 KiB	46.4 KiB
www.browsealoud.com/modules/3.11.0/6514.ac3cda7a458b82b8b52f.js	103.0 KiB	40.3 KiB
/pages/versioned/common-scripts/4ce8c7df8d425cc5046457682...	55.1 KiB	28.5 KiB
maps.googleapis.com/maps-api-v3/api/js/64/9c/common.js	36.9 KiB	27.4 KiB
maps.googleapis.com/maps-api-v3/api/js/64/9c/util.js	69.7 KiB	26.7 KiB
maps.googleapis.com/maps-api-v3/api/js/64/9c/controls.js	26.0 KiB	23.9 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Total CPU Time	Script Evaluation	Script Parse
www.uscourts.gov/	745 ms	3.7 ms	1.3 ms
Unattributable	538 ms	19 ms	0.0 ms
www.googletagmanager.com/gtag/js?id=G-83ZBSG354S&cx=c&gtm=4e64h1	326 ms	275 ms	36 ms
/pages/versioned/common-scripts/4ce8c7df8d425cc5046457682...	314 ms	269 ms	17 ms
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	302 ms	253 ms	39 ms
/sites/default/files/js/js_4IeZh9lgoJSjXlTsiHVs0ZjMR-afO2...	189 ms	139 ms	26 ms
www.googletagmanager.com/gtm.js?id=GTM-KHXCKX8P	176 ms	132 ms	35 ms
/maps/api/js?key=AIzaSyAOqwLK442_q7mNhlwr0uPFTxm7rg726a0&...	175 ms	99 ms	52 ms
www.browsealoud.com/modules/3.11.0/4230.c222ded98d9c6a4219ab.js	134 ms	97 ms	27 ms
www.browsealoud.com/modules/3.11.0/6514.ac3cda7a458b82b8b52f.js	133 ms	96 ms	34 ms
/sites/default/files/js/js_0s-AviPvXBpDOIvXX7kzsmnu2UA_Pr...	132 ms	36 ms	15 ms
maps.googleapis.com/maps-api-v3/api/js/64/9c/common.js	118 ms	80 ms	28 ms
dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js	66 ms	64 ms	1.1 ms
maps.googleapis.com/maps-api-v3/api/js/64/9c/util.js	66 ms	21 ms	35 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

Category	Time Spent
Script Evaluation	1.8 s
Other	752 ms
Style & Layout	599 ms
Script Parsing & Compilation	417 ms
Rendering	119 ms
Parse HTML & CSS	77 ms

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 2.4 KiB

URL	Transfer Size	Est Savings
#__ba_launchpad { font-size: 10px; } …	18.8 KiB	2.4 KiB

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size
www.youtube.com/s/player/218d9d92/player_embed.vflset/en_US/base.js	471.6 KiB
www.youtube.com/s/player/218d9d92/player_embed_es6.vflset/en_US/base.js	435.8 KiB
/s/_/ytembeds/_/js/k=ytembeds.base.en_US.iLl3DKTx01E.es5....	214.7 KiB
/s/_/ytembeds/_/js/k=ytembeds.base.en_US.CYE28xQTWxU.2021...	193.0 KiB
/maps/api/js?key=AIzaSyAOqwLK442_q7mNhlwr0uPFTxm7rg726a0&...	178.8 KiB
/s/_/ytembeds/_/js/k=ytembeds.base.en_US.iLl3DKTx01E.es5....	160.9 KiB
www.googletagmanager.com/gtag/js?id=G-83ZBSG354S&cx=c&gtm=4e64h1	151.2 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	147.5 KiB
www.googletagmanager.com/gtm.js?id=GTM-KHXCKX8P	133.3 KiB
www.browsealoud.com/modules/3.11.0/6514.ac3cda7a458b82b8b52f.js	103.5 KiB

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Layout shift culprits

●Optimize DOM size

●LCP breakdown

●Optimize viewport for mobile

●Minify JavaScript

●User Timing marks and measures 14 user timings

●Avoid long main-thread tasks 17 long tasks found

●Image elements have explicit `width` and `height`

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 40 ms

●Server Backend Latencies 160 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

○INP breakdown

○Avoid non-composited animations

○Avoid large layout shifts

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Listen to this page `div.usa-banner__inner > div.usa-accordion__browsealoud > div#__ba_panel > button.textDiv`

These items highlight common accessibility best practices.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Listen to this page `div.usa-banner__inner > div.usa-accordion__browsealoud > div#__ba_panel > button.textDiv`

○Interactive controls are keyboard focusable

○Interactive elements indicate their purpose and state

○The page has a logical tab order

○Visual order on the page follows DOM order

○User focus is not accidentally trapped in a region

○The user's focus is directed to new content added to the page

○HTML5 landmark elements are used to improve navigation

○Offscreen content is hidden from assistive technology

○Custom controls have associated labels

○Custom controls have ARIA roles

●`[aria-*]` attributes match their roles

●`[aria-hidden="true"]` is not present on the document `<body>`

●`[role]`s have all required `[aria-*]` attributes

●`[role]` values are valid

●`[aria-*]` attributes have valid values

●`[aria-*]` attributes are valid and not misspelled

●Buttons have an accessible name

●Image elements have `[alt]` attributes

●Form elements have associated labels

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●ARIA attributes are used as specified for the element's role

●`[aria-hidden="true"]` elements do not contain focusable descendents

●Elements use only permitted ARIA attributes

●Background and foreground colors have a sufficient contrast ratio

●Document has a `<title>` element

●`<frame>` or `<iframe>` elements have a title

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Links have a discernible name

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●No element has a `[tabindex]` value greater than 0

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

●Identical links have the same purpose.

○`[accesskey]` values are unique

○`button`, `link`, and `menuitem` elements have accessible names

○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

○`[role]`s are contained by their required parent element

○Elements with the `role=text` attribute do not have focusable descendents.

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

○The page contains a heading, skip link, or landmark region

○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.

○Definition list items are wrapped in `<dl>` elements

○ARIA IDs are unique

○No form fields have multiple labels

○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

○Input buttons have discernible text.

○`<input type="image">` elements have `[alt]` text

○Links are distinguishable without relying on color.

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.

○`[lang]` attributes have a valid value

○`<video>` elements contain a `<track>` element with `[kind="captions"]`

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

○Image elements do not have `[alt]` attributes that are redundant text.

○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.

○`<td>` elements in a large `<table>` have one or more table headers.

100

Best Practices

●Uses HTTPS

●Avoids deprecated APIs

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●Displays images with correct aspect ratio

●Serves images with appropriate resolution

●Page has the HTML doctype

●Properly defines charset

●No browser errors logged to the console

●No issues in the `Issues` panel in Chrome Devtools

●Ensure CSP is effective against XSS attacks

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Mitigate clickjacking with XFO or CSP

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Content Best Practices

Meta descriptions may be included in search results to concisely summarize page content. Learn more about the meta description.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Format your HTML in a way that enables crawlers to better understand your app’s content.

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Page has successful HTTP status code

●Links have descriptive text

●Links are crawlable

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

○robots.txt is valid