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Lighthouse Desktop

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

Audit breakdown by category with detailed findings.

69

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.

RequestCache TTLTransfer Size
www.gao.gov/themes/custom/gao_uswds/dist/gao-img//gao-metal-seal.png176.0 s933.5 KiB
/themes/custom/gao_uswds/dist/gao-img/meet-comptroller-ge...300.0 s941.0 KiB
www.gao.gov/themes/custom/gao_uswds/dist/gao-img/email-subscription.jpg276.0 s366.1 KiB
/assets/css/css_L24m6c7JV72YoZpvMjn3Ouij4gaVj6CaeGWYskoOt...175.0 s337.5 KiB
www.gao.gov/themes/custom/gao_uswds/dist/fonts/lato/Lato-Bold.woff2276.0 s180.9 KiB
www.gao.gov/themes/custom/gao_uswds/dist/fonts/lato/Lato-Regular.woff2276.0 s178.8 KiB
/assets/styles/hero_xl/public/2025-08/Nonpartisan-slider-...276.0 s152.4 KiB
www.gao.gov/themes/custom/gao_uswds/dist/fonts/webfonts/fa-solid-900.woff2277.0 s112.4 KiB
/assets/js/js_M7SdCY2SYZwgfWQXlt1xiLMQFifO5a6NO9lrgyvPDSU...177.0 s109.7 KiB
www.gao.gov/themes/custom/gao_uswds/dist/fonts/webfonts/fa-brands-400.woff2276.0 s107.8 KiB
/assets/styles/wide_2x/public/2026-04/Public Libraries_PI...292.0 s94.3 KiB
/assets/styles/circular_large_2x/public/2021-03/AdobeStoc...292.0 s66.6 KiB
/assets/styles/wide_2x/public/2026-04/US Courthouse for s...292.0 s61.4 KiB
/assets/styles/hero_xl/public/2020-12/transition-flag.jpe...276.0 s50.4 KiB
/assets/styles/hero_xl/public/2026-01/FY25-26Slide-PAR.pn...276.0 s49.3 KiB
/assets/styles/wide_2x/public/890/884473.png.webp?h=952e3...292.0 s41.2 KiB
/assets/styles/wide_2x/public/890/884983.png.webp?h=50146...292.0 s35.8 KiB
/assets/styles/wide_2x/public/2026-02/YourGAO 2026 square...292.0 s35.5 KiB
/assets/styles/circular_large_2x/public/2020-12/transitio...292.0 s31.7 KiB
/assets/styles/wide_1x/public/extracts/15ff5fa3da06656e19...276.0 s31.5 KiB
/assets/styles/wide_1x/public/extracts/14ff31ac98e95e31e5...276.0 s31.1 KiB
/assets/styles/circular_large_2x/public/2025-03/FIP-topic...292.0 s29.7 KiB
www.gao.gov/core/assets/vendor/jquery/jquery.min.js?v=4.0.0177.0 s27.2 KiB
/assets/styles/wide_1x/public/extracts/6ab02389a42bae4880...276.0 s24.3 KiB
/assets/styles/wide_1x/public/extracts/e607b4ff3e7614e98d...276.0 s22.9 KiB
/themes/custom/gao_uswds/dist/fonts/merriweather/Latin-Me...276.0 s21.1 KiB
/assets/styles/circular_small_2x/public/2020-09/Duplicati...291.0 s20.6 KiB
/assets/styles/circular_small_2x/public/2022-08/AdobeStoc...291.0 s18.9 KiB
www.gao.gov/themes/custom/gao_uswds/dist/fonts/webfonts/fa-regular-400.woff2276.0 s18.7 KiB
/assets/styles/circular_large_2x/public/2019-10/Science1-...292.0 s18.1 KiB
www.google-analytics.com/analytics.js7200.0 s20.9 KiB
/assets/styles/wide_1x/public/extracts/e6bb81669b5d11baaa...276.0 s16.2 KiB
/assets/styles/wide_1x/public/extracts/6d5322087bb354f381...276.0 s12.1 KiB
/assets/js/js_2etTA5GX_MqzAqBpgb9V3dhdLF0W0lpOlTsezLEGr7w...177.0 s8.5 KiB
/assets/styles/circular_small_2x/public/2019-10/0_high ri...292.0 s8.2 KiB
/assets/styles/circular_small_2x/public/2021-03/AFF-new-b...291.0 s5.6 KiB
/assets/css/css_Jy6Y2yYiSbh3I98cFZPomKJnJDjzUf1XHNzO7r_bv...300.0 s4.5 KiB
/assets/styles/circular_small_2x/public/2024-08/pen-01.pn...293.0 s4.5 KiB
www.gao.gov/themes/custom/gao_uswds/dist/gao-img//WatchBlog.svg182.0 s3.0 KiB
www.gao.gov/themes/custom/gao_uswds/dist/gao-img//GAO-logo-footer.png176.0 s2.8 KiB
www.gao.gov/themes/custom/gao_uswds/dist/gao-img/GAO-logo.png175.0 s1.7 KiB
/vi/MlDluQZJymA/default.jpg?sqp=-oaymwEmCHgQWvKriqkDHBgA8...7200.0 s2.0 KiB
www.gao.gov/themes/custom/gao_uswds/dist/gao-img//threads-white.svg180.0 s1.3 KiB
www.gao.gov/themes/custom/gao_uswds/dist/gao-img//instagram-white.svg180.0 s1.1 KiB
/assets/js/js_HpA9xKBj-hlVIgnRCcHgaRCcnP9zBDC1JpnHKrbmwyU...176.0 s1001 B
www.gao.gov/themes/custom/gao_uswds/dist/gao-img//bluesky-white.svg179.0 s948 B
www.gao.gov/modules/contrib/google_tag/js/gtag.js?tdv3co175.0 s905 B
www.gao.gov/themes/custom/gao_uswds/dist/gao-img//microphone-white.svg182.0 s864 B
www.gao.gov/themes/custom/gao_uswds/dist/gao-img//youtube-white.svg181.0 s845 B
www.gao.gov/themes/custom/gao_uswds/dist/gao-img//rss-white.svg182.0 s840 B
www.gao.gov/modules/contrib/google_tag/js/gtm.js?tdv3co175.0 s829 B
www.gao.gov/themes/custom/gao_uswds/dist/gao-img//linkedin-in-white.svg179.0 s829 B
/modules/contrib/uswds_ckeditor_integration/js/aftermarke...177.0 s793 B
www.gao.gov/themes/custom/gao_uswds/dist/gao-img//flickr-white.svg181.0 s793 B
www.gao.gov/themes/custom/gao_uswds/dist/gao-img//envelope-white.svg183.0 s790 B
www.gao.gov/themes/custom/gao_uswds/dist/gao-img//facebook-white.svg178.0 s743 B
/themes/custom/gao_uswds/dist/gao-img//x-twitter-brands-s...178.0 s532 B
/assets/js/js_I85qGdp_TKYdQ-uQ4y_q8dCb37RENzq5IpgNc0js_CA...175.0 s523 B
www.gao.gov/themes/custom/gao_uswds/dist/img/usa-icons-bg/search--white.svg176.0 s523 B
www.gao.gov/themes/custom/gao_uswds/dist/img/usa-icons-bg/close--white.svg175.0 s456 B
static.doubleclick.net/instream/ad_status.js900.0 s494 B
www.gao.gov/themes/custom/gao_uswds/dist/img/usa-icons/expand_more.svg300.0 s415 B
api.ipify.org/?format=jsonp&callback=getIP0.0 ms167 B

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.105226] map[node:map[boundingRect:map[bottom:5157 height:4481 left:81 right:1269 top:676 width:1188] lhId:page-25-DIV nodeLabel:Recent Reports & Testimonies Medicare: CMS’s Use of Data Analytics to Identify … path:1,HTML,1,BODY,2,DIV,4,DIV selector:body.path-frontpage > div.dialog-off-canvas-main-canvas > div.main-page-content--wrapper snippet:<div class="main-page-content--wrapper container-fluid grid-container"> type:node] score:0.068037 subItems:map[items:[map[cause:Web font extra:map[type:url value:https://www.gao.gov/themes/custom/gao_uswds/dist/fonts/webfonts/fa-solid-900.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:640 height:439 left:0 right:1350 top:200 width:1350] lhId:page-20-DIV nodeLabel:When Members of Congress Need Answers to Complex Questions—They Come to GAO. RE… path:1,HTML,1,BODY,2,DIV,3,SECTION,0,DIV,0,DIV,0,SECTION,0,DIV,0,DIV,0,DIV,2,DIV selector:div.block__inner > div.hero-slider > div#swiper-wrapper-67db566dc7d9b9610 > div#paragraph-74351 snippet:<div id="paragraph-74351" class="component-hero-slide paragraph--type-hero-slide paragraph--view-mode-page-…" data-entity-id="74351" data-entity-type="paragraph" role="group" aria-label="2 / 3" data-swiper-slide-index="1" style="width: 1350px;"> type:node] score:0.037189 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:81 height:49 left:97 right:241 top:32 width:144] lhId:page-26-IMG nodeLabel:Home path:1,HTML,1,BODY,2,DIV,2,HEADER,0,DIV,0,DIV,0,EM,0,A,0,IMG selector:div#logo > em.usa-logo__text > a.logo-img > img snippet:<img src="/themes/custom/gao_uswds/dist/gao-img/GAO-logo.png" alt="Home"> type:node]]] type:subitems]]]

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.

URLEst Savings
www.gao.gov/themes/custom/gao_uswds/dist/fonts/webfonts/fa-brands-400.woff255 ms
www.gao.gov/themes/custom/gao_uswds/dist/fonts/webfonts/fa-regular-400.woff250 ms
www.gao.gov/themes/custom/gao_uswds/dist/fonts/lato/Lato-Bold.woff240 ms
www.gao.gov/themes/custom/gao_uswds/dist/fonts/lato/Lato-Regular.woff235 ms
/themes/custom/gao_uswds/dist/fonts/merriweather/Latin-Me...35 ms
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff235 ms
www.gao.gov/themes/custom/gao_uswds/dist/fonts/webfonts/fa-solid-900.woff210 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.

URLResource SizeEst Savings
U.S. Government Accountability Office metal seal div.field > div.grid-row > div > img.gao-seal
www.gao.gov/themes/custom/gao_uswds/dist/gao-img//gao-metal-seal.png932.7 KiB834.9 KiB
About the U.S. Comptroller General Learn more about the role of the U.S. Compt… section#paragraph-391 > div.component-embed-block__content > div.field > div.grid-row
/themes/custom/gao_uswds/dist/gao-img/meet-comptroller-ge...940.2 KiB817.6 KiB
A woman and child looking at a book in a library figure > div.media > picture > img.media__element
/assets/styles/wide_2x/public/2026-04/Public Libraries_PI...94.0 KiB89.2 KiB
keyboard lock; Source: weerapat1003\stock.adobe.com. a > div.featured-topics > figure > img
/assets/styles/circular_large_2x/public/2021-03/AdobeStoc...66.4 KiB60.5 KiB
A U.S. courthouse in Iowa that was sold by GSA. figure > div.media > picture > img.media__element
/assets/styles/wide_2x/public/2026-04/US Courthouse for s...61.1 KiB58.0 KiB
Efforts to Stop the Sale of Thousands of Unauthorized E-Cigarette Products figure > div.media > picture > img.media__element
/assets/styles/wide_2x/public/890/884473.png.webp?h=952e3...40.9 KiB38.5 KiB
Preventing Fraud in Medicare figure > div.media > picture > img.media__element
/assets/styles/wide_2x/public/890/884983.png.webp?h=50146...35.6 KiB33.5 KiB
Graphic that reads YourGAO using the GAO logo next to an outline of the Capitol… figure > div.media > picture > img.media__element
/assets/styles/wide_2x/public/2026-02/YourGAO 2026 square...35.3 KiB33.4 KiB
American flag a > div.featured-topics > figure > img
/assets/styles/circular_large_2x/public/2020-12/transitio...31.4 KiB28.7 KiB
Fraud and Improper Payments Teaser a > div.featured-topics > figure > img
/assets/styles/circular_large_2x/public/2025-03/FIP-topic...29.4 KiB26.8 KiB
U.S. Capitol building under a bright blue sky. div.views-field > div.field-content > a > img
/assets/styles/wide_1x/public/extracts/15ff5fa3da06656e19...31.3 KiB19.2 KiB
Freight container being loaded onto a train car div.views-field > div.field-content > a > img
/assets/styles/wide_1x/public/extracts/14ff31ac98e95e31e5...30.9 KiB19.0 KiB
Science 1 Scope a > div.featured-topics > figure > img
/assets/styles/circular_large_2x/public/2019-10/Science1-...17.9 KiB16.3 KiB
The U.S. Capitol building with the words GAO Testimony to Congress. div.views-field > div.field-content > a > img
/assets/styles/wide_1x/public/extracts/6ab02389a42bae4880...24.1 KiB14.8 KiB
100-dollar bills a > div.signature-reports > figure > img
/assets/styles/circular_small_2x/public/2020-09/Duplicati...20.4 KiB14.5 KiB
A woman interacts with a man in a wheelchair. div.views-field > div.field-content > a > img
/assets/styles/wide_1x/public/extracts/e607b4ff3e7614e98d...22.6 KiB13.9 KiB
Photo of an American community. Source: mandritoiu/stock.adobe.com./ a > div.signature-reports > figure > img
/assets/styles/circular_small_2x/public/2022-08/AdobeStoc...18.7 KiB12.8 KiB
A dog on its hind legs puts its front paws on a luggage trolley being pushed by… div.views-field > div.field-content > a > img
/assets/styles/wide_1x/public/extracts/e6bb81669b5d11baaa...16.0 KiB9.8 KiB
A view of the Centers for Medicare & Medicaid Services website through a magnif… div.views-field > div.field-content > a > img
/assets/styles/wide_1x/public/extracts/6d5322087bb354f381...11.8 KiB7.3 KiB

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-19-DIV
nodeLabel: America250 & GAO: Informing Democracy Through Oversight READ MORE
path: 1,HTML,1,BODY,2,DIV,3,SECTION,0,DIV,0,DIV,0,SECTION,0,DIV,0,DIV,0,DIV,1,DIV
selector: div.block__inner > div.hero-slider > div#swiper-wrapper-67db566dc7d9b9610 > div#paragraph-78586
snippet: <div id="paragraph-78586" class="component-hero-slide paragraph--type-hero-slide paragraph--view-mode-page-…" data-entity-id="78586" data-entity-type="paragraph" role="group" aria-label="1 / 3" data-swiper-slide-index="0" style="width: 1350px;">

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

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.

URLTransfer SizeDuration
/assets/css/css_Jy6Y2yYiSbh3I98cFZPomKJnJDjzUf1XHNzO7r_bv...4.5 KiB
www.gao.gov/modules/contrib/google_tag/js/gtm.js?tdv3co829 B
/assets/css/css_L24m6c7JV72YoZpvMjn3Ouij4gaVj6CaeGWYskoOt...337.5 KiB285 ms
www.gao.gov/modules/contrib/google_tag/js/gtag.js?tdv3co905 B
/assets/js/js_I85qGdp_TKYdQ-uQ4y_q8dCb37RENzq5IpgNc0js_CA...523 B

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: 483 ms
URLTime Spent
gao.gov/483 ms
www.gao.gov/0.0 ms

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

ElementLayout shift score
Recent Reports & Testimonies Medicare: CMS’s Use of Data Analytics to Identify … body.path-frontpage > div.dialog-off-canvas-main-canvas > div.main-page-content--wrapper
0.068
When Members of Congress Need Answers to Complex Questions—They Come to GAO. RE… div.block__inner > div.hero-slider > div#swiper-wrapper-67db566dc7d9b9610 > div#paragraph-74351
0.037

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

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: 250 ms 326.4 KiB
URLTransfer SizeEst Savings
/assets/css/css_L24m6c7JV72YoZpvMjn3Ouij4gaVj6CaeGWYskoOt...337.3 KiB326.4 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: 60 ms 323.2 KiB
URLTransfer SizeEst Savings
www.googletagmanager.com/gtag/js?id=G-26MP5S07MC&cx=c&gtm=4e64h1h1151.6 KiB66.0 KiB
www.googletagmanager.com/gtag/js?id=UA-29643216-1&cx=c&gtm=4e64h1h1125.1 KiB65.9 KiB
/assets/js/js_M7SdCY2SYZwgfWQXlt1xiLMQFifO5a6NO9lrgyvPDSU...109.5 KiB65.6 KiB
www.googletagmanager.com/gtm.js?id=GTM-TZMWNH7133.4 KiB64.4 KiB
www.googletagmanager.com/gtag/js?id=G-V393SNS3SR156.5 KiB61.5 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.

URLTransfer Size
/themes/custom/gao_uswds/dist/gao-img/meet-comptroller-ge...941.0 KiB
www.gao.gov/themes/custom/gao_uswds/dist/gao-img//gao-metal-seal.png933.5 KiB
www.youtube.com/s/player/218d9d92/player_embed_es6.vflset/en_US/base.js435.8 KiB
www.gao.gov/themes/custom/gao_uswds/dist/gao-img/email-subscription.jpg366.1 KiB
/assets/css/css_L24m6c7JV72YoZpvMjn3Ouij4gaVj6CaeGWYskoOt...337.5 KiB
/s/_/ytembeds/_/js/k=ytembeds.base.en_US.CYE28xQTWxU.2021...193.1 KiB
www.gao.gov/themes/custom/gao_uswds/dist/fonts/lato/Lato-Bold.woff2180.9 KiB
www.gao.gov/themes/custom/gao_uswds/dist/fonts/lato/Lato-Regular.woff2178.8 KiB
www.googletagmanager.com/gtag/js?id=G-V393SNS3SR156.8 KiB
/assets/styles/hero_xl/public/2025-08/Nonpartisan-slider-...152.4 KiB

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

●Max Potential First Input Delay 120 ms
●Optimize DOM size
●Forced reflow
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●User Timing marks and measures 10 user timings
●JavaScript execution time 0.6 s
●Minimizes main-thread work 1.9 s
●Avoid long main-thread tasks 3 long tasks found
●Image elements have explicit `width` and `height`
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 90 ms
●Server Backend Latencies 80 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 10 ms
○INP breakdown
○Avoid non-composited animations
99

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.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
GAO Reports $62.7 Billion in Financial Benefits in Fiscal Year 2025 article.node > a > header.node__title > h5
GAO Makes 2025 PTAC Appointment article.node > a > header.node__title > h5

These are opportunities to improve keyboard navigation in your application.

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
U.S. Government Accountability Office div.region > div#logo > em.usa-logo__text > a.logo-img
Learn More div.grid-container > div.meet-CG-links > div.CG-about > a.usa-button
U.S. Government Accountability Office div.grid-container > div.grid-row > div#block--gao_footer_info > a.logo-img
○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
●Input buttons have discernible text.
●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.
●`[accesskey]` values are unique
●`button`, `link`, and `menuitem` elements have accessible names
●ARIA attributes are used as specified for the element's role
●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
●Touch targets have sufficient size and spacing.
●Skip links are focusable.
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Image elements do not have `[alt]` attributes that are redundant text.
●Identical links have the same purpose.
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○`[aria-hidden="true"]` elements do not contain focusable descendents
○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 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.
○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
○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
92

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

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destinationLink Text
www.gao.gov/about/what-gao-does/yourgaoREAD MORE
/press-release/gao-reports-62.7-billion-financial-benefit...READ MORE
www.gao.gov/america-250READ MORE
www.gao.gov/about/comptroller-generalLearn More

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
●Document has a meta description
●Page has successful HTTP status code
●Links are crawlable
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`
○robots.txt is valid

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