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
/libraries/fancy-apps-photo-gallery/dist/fancybox/fancybo...	14400.0 s	42.0 KiB
fas.my.site.com/ESWEnhancedChatChannel1770490368263/assets/js/bootstrap.min.js	60.0 s	26.3 KiB
/sites/gsa.gov/themes/custom/gsa/dist/fonts/source-sans-p...	14400.0 s	20.5 KiB
/sites/gsa.gov/themes/custom/gsa/dist/fonts/source-sans-p...	14400.0 s	20.3 KiB
www.gsa.gov/sites/gsa.gov/themes/custom/gsa/250-Starmark-and-Seal_final.png	14400.0 s	15.7 KiB
/Universal-Federated-Analytics-Min.js?agency=GSA&sp=s&enh...	0.0 ms	9.4 KiB
siteimproveanalytics.com/js/siteanalyze_8808.js	86400.0 s	20.5 KiB
dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js	0.0 ms	4.5 KiB
www.gsa.gov/sites/gsa.gov/themes/custom/gsa/GSA-250-footer-logo.png	14400.0 s	5.8 KiB
/SIE/?Q_ZID=ZN_0d171YnFuvpJle6	3600.0 s	4.7 KiB
/dxjsmodule/12.1a2b7192fd54e87d3971.chunk.js?Q_CLIENTVERS...	604800.0 s	36.5 KiB
/dxjsmodule/CoreModule.js?Q_CLIENTVERSION=2.46.0&Q_CLIENT...	604800.0 s	31.6 KiB
/libraries/fancy-apps-photo-gallery/dist/carousel/carouse...	14400.0 s	4.2 KiB
/ESWEnhancedChatChannel1770490368263/assets/styles/bootst...	60.0 s	2.9 KiB
fas.my.site.com/ESWEnhancedChatChannel1770490368263/assets/js/inert.min.js	60.0 s	2.7 KiB
/maps/api/js?key=AIzaSyDtYCxxWfs8ArQPNMOV_6ahLfSVSrQWDRM&...	1800.0 s	2.8 KiB
/dxjsmodule/37.7ea1ffe71ad8c0799cc1.chunk.js?Q_CLIENTVERS...	604800.0 s	19.2 KiB
fas.my.site.com/ESWEnhancedChatChannel1770490368263/assets/js/sitecontext.min.js	60.0 s	1.5 KiB
/dxjsmodule/2.c77bfb664ac5163c3679.chunk.js?Q_CLIENTVERSI...	604800.0 s	14.7 KiB
/dxjsmodule/WebResponsiveDialogModule.js?Q_CLIENTVERSION=...	604800.0 s	12.4 KiB
/dxjsmodule/0.afc70b56ad665706f2d1.chunk.js?Q_CLIENTVERSI...	604800.0 s	10.7 KiB
/dxjsmodule/4.d5fdf4d261eebac361ea.chunk.js?Q_CLIENTVERSI...	604800.0 s	8.0 KiB
www.gsa.gov/sites/gsa.gov/themes/custom/gsa/dist/img/uswds-icons/instagram.svg	14400.0 s	1.2 KiB
/dxjsmodule/1.bc67e778235741631577.chunk.js?Q_CLIENTVERSI...	604800.0 s	7.8 KiB
/dxjsmodule/14.a6d165bbf154f0d823fe.chunk.js?Q_CLIENTVERS...	604800.0 s	7.7 KiB
www.gsa.gov/modules/contrib/google_tag/js/gtag.js?tdm59v	14400.0 s	1016 B
www.gsa.gov/modules/contrib/google_tag/js/gtm.js?tdm59v	14400.0 s	1000 B
www.gsa.gov/modules/custom/glossary/img/icon-glossary.svg	14400.0 s	938 B
www.gsa.gov/sites/gsa.gov/themes/custom/gsa/dist/img/icon-https.svg	14400.0 s	836 B
www.gsa.gov/sites/gsa.gov/themes/custom/gsa/dist/img/icon-dot-gov.svg	14400.0 s	811 B
www.gsa.gov/sites/gsa.gov/themes/custom/gsa/dist/img/angle-arrow-down-white.svg	14400.0 s	805 B
www.gsa.gov/sites/gsa.gov/themes/custom/gsa/dist/img/arrow-both.svg	14400.0 s	793 B
www.gsa.gov/sites/gsa.gov/themes/custom/gsa/dist/img/uswds-icons/linkedin.svg	14400.0 s	787 B
/sites/gsa.gov/themes/custom/gsa/dist/img/usa-icons-bg/se...	14400.0 s	782 B
www.gsa.gov/sites/gsa.gov/themes/custom/gsa/dist/img/material-icons/facebook.svg	14400.0 s	778 B
/sites/gsa.gov/themes/custom/gsa/custom_assets/icons/TS-L...	14400.0 s	743 B
www.gsa.gov/sites/gsa.gov/themes/custom/gsa/dist/img/uswds-icons/x.svg	14400.0 s	737 B
www.gsa.gov/sites/gsa.gov/themes/custom/gsa/dist/img/uswds-icons/youtube.svg	14400.0 s	736 B
www.gsa.gov/sites/gsa.gov/themes/custom/gsa/dist/img/material-icons/rss_feed.svg	14400.0 s	716 B
/sites/gsa.gov/themes/custom/gsa/dist/img/usa-icons-bg/cl...	14400.0 s	677 B
www.gsa.gov/sites/gsa.gov/themes/custom/gsa/dist/img/us_flag_small.png	14400.0 s	672 B
www.gsa.gov/sites/gsa.gov/themes/custom/gsa/dist/img/usa-icons/launch.svg	14400.0 s	659 B
www.gsa.gov/sites/gsa.gov/themes/custom/gsa/dist/img/usa-icons/location_on.svg	14400.0 s	648 B
/sites/gsa.gov/themes/custom/gsa/dist/img/usa-icons/calen...	14400.0 s	643 B
www.gsa.gov/sites/gsa.gov/themes/custom/gsa/dist/img/material-icons/email.svg	14400.0 s	643 B
www.gsa.gov/sites/gsa.gov/themes/custom/gsa/dist/img/usa-icons/expand_more.svg	14400.0 s	575 B
/dxjsmodule/39.cb1671aab3326ef58bc7.chunk.js?Q_CLIENTVERS...	604800.0 s	3.7 KiB
/dxjsmodule/7.f7df015b06d8a90ce822.chunk.js?Q_CLIENTVERSI...	604800.0 s	2.0 KiB

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:0.671097] map[node:map[boundingRect:map[bottom:4700 height:4519 left:0 right:412 top:181 width:412] lhId:page-8-MAIN nodeLabel:Delivering effective and efficient government services for the American people … path:1,HTML,1,BODY,2,DIV,3,MAIN selector:body.no_dialog > div.dialog-off-canvas-main-canvas > main#main-content snippet:<main class="usa-section" id="main-content"> type:node] score:0.671097 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:180 height:52 left:10 right:139 top:128 width:130] lhId:page-6-IMG nodeLabel:GSA 250 year anniversary logo and seal path:1,HTML,1,BODY,2,DIV,2,HEADER,1,DIV,0,DIV,0,DIV,0,A,0,IMG selector:div.region > div.usa-logo > a#logo > img snippet:<img src="/sites/gsa.gov/themes/custom/gsa/250-Starmark-and-Seal_final.png" alt="GSA 250 year anniversary logo and seal"> 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.

URL	Est Savings
/sites/gsa.gov/themes/custom/gsa/dist/fonts/source-sans-p...	275 ms
/sites/gsa.gov/themes/custom/gsa/dist/fonts/source-sans-p...	25 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
div.field > div.field__item > article.media > img.width-full `div.field > div.field__item > article.media > img.width-full`	www.gsa.gov/system/files/768x428-6-Access.png	459.6 KiB	419.5 KiB
USE IT ACT AND OCCUPANCY DATA `div.field > div.field__item > article.media > img.width-full`	www.gsa.gov/system/files/768x428-5-USEITActandOccupancyData.jpg	260.3 KiB	220.2 KiB
Sell to Government `ol.usa-page_categories > li.usa-page_category_item > p.margin-top-1 > img.width-full`	www.gsa.gov/system/files/hp_buyingSelling2_500x152.png	131.8 KiB	119.5 KiB
Buy Through Us `ol.usa-page_categories > li.usa-page_category_item > p.margin-top-1 > img.width-full`	www.gsa.gov/system/files/hp_buying2_500x152_mobile.png	121.7 KiB	109.3 KiB
An illustration of geometric shapes showing parts of calendar months with the w… `div.field > div.field__item > article.media > img.width-full`	www.gsa.gov/system/files/768x428-2026-Focus-Calendar.png	99.1 KiB	59.0 KiB
Real Estate `ol.usa-page_categories > li.usa-page_category_item > p.margin-top-1 > img.width-full`	www.gsa.gov/system/files/hp_realestate_500x152_mobile.jpg	26.4 KiB	14.0 KiB
GSA 250 year anniversary logo and seal `div.region > div.usa-logo > a#logo > img`	www.gsa.gov/sites/gsa.gov/themes/custom/gsa/250-Starmark-and-Seal_final.png	15.2 KiB	11.9 KiB
Technology `ol.usa-page_categories > li.usa-page_category_item > p.margin-top-1 > img.width-full`	www.gsa.gov/system/files/hp_technology_500x152_mobile.jpg	19.7 KiB	7.3 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-2-IMG

nodeLabel: Sell to Government

path: 1,HTML,1,BODY,2,DIV,3,MAIN,0,DIV,1,DIV,0,DIV,0,DIV,0,ARTICLE,0,DIV,2,SECTION,0,DIV,0,NAV,4,OL,2,LI,2,P,1,IMG

selector: ol.usa-page_categories > li.usa-page_category_item > p.margin-top-1 > img.width-full

snippet: <img class="width-full m-category-description img_responsive img-responsive" alt="Sell to Government" src="https://www.gsa.gov/system/files/hp_buyingSelling2_500x152.png">

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

value: no origins were preconnected

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.

URL	Transfer Size	Duration
www.gsa.gov/modules/contrib/google_tag/js/gtag.js?tdm59v	1016 B
www.gsa.gov/modules/contrib/google_tag/js/gtm.js?tdm59v	1000 B
/sites/gsa.gov/files/css/css_nU33pZ0_dpTMtsd_seB_fyrGMbVa...	107.3 KiB	665 ms
/sites/gsa.gov/files/css/css_UzV3CjKcr8TfpugaTZCbTBrotNRN...	16.0 KiB	166 ms
/sites/gsa.gov/files/js/js_80jaC5or6X8Hghz6OC9xaDFBtptJkN...	873 B
/sites/gsa.gov/files/css/css_O2Y7fJjz4qbHARnfLCBPDpksZhVO...	2.2 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: 1.1 s

URL	Time Spent
gsa.gov/	1.1 s
www.gsa.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.

Element	Layout shift score
Delivering effective and efficient government services for the American people … `body.no_dialog > div.dialog-off-canvas-main-canvas > main#main-content`	0.671

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: 510 ms 118.8 KiB

URL	Transfer Size	Est Savings
/sites/gsa.gov/files/css/css_nU33pZ0_dpTMtsd_seB_fyrGMbVa...	106.9 KiB	103.6 KiB
/sites/gsa.gov/files/css/css_UzV3CjKcr8TfpugaTZCbTBrotNRN...	15.5 KiB	15.2 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: 2.2 s 526.8 KiB

URL	Transfer Size	Est Savings
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64k0h2	147.0 KiB	105.8 KiB
/sites/gsa.gov/files/js/js_ynERFnCjSxXEMR6BIKrwpC3iUumKJu...	116.9 KiB	85.0 KiB
www.googletagmanager.com/gtag/js?id=G-HBYXWFP794&cx=c&gtm=4e64k0h2	155.4 KiB	62.5 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	147.0 KiB	61.1 KiB
maps.googleapis.com/maps-api-v3/api/js/64/9c/main.js	82.8 KiB	55.6 KiB
www.googletagmanager.com/gtm.js?id=GTM-W4SGTNW	146.1 KiB	55.5 KiB
/libraries/fancy-apps-photo-gallery/dist/fancybox/fancybo...	41.6 KiB	36.7 KiB
/sites/gsa.gov/files/js/js_KllTCYhv7q9bVodHvxc4brFY45MoMg...	36.8 KiB	21.8 KiB
/dxjsmodule/CoreModule.js?Q_CLIENTVERSION=2.46.0&Q_CLIENT...	30.8 KiB	21.5 KiB
/dxjsmodule/12.1a2b7192fd54e87d3971.chunk.js?Q_CLIENTVERS...	35.7 KiB	21.3 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
Unattributable	421 ms	6.7 ms	0.0 ms
www.gsa.gov/	332 ms	12 ms	2.1 ms
www.googletagmanager.com/gtm.js?id=GTM-W4SGTNW	277 ms	232 ms	38 ms
www.googletagmanager.com/gtag/js?id=G-HBYXWFP794&cx=c&gtm=4e64k0h2	223 ms	187 ms	34 ms
/sites/gsa.gov/files/js/js_ynERFnCjSxXEMR6BIKrwpC3iUumKJu...	191 ms	122 ms	29 ms
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	185 ms	146 ms	30 ms
/sites/gsa.gov/files/css/css_nU33pZ0_dpTMtsd_seB_fyrGMbVa...	175 ms	0.0 ms	0.0 ms
/dxjsmodule/12.1a2b7192fd54e87d3971.chunk.js?Q_CLIENTVERS...	142 ms	114 ms	9.2 ms
/sites/gsa.gov/files/js/js_I5MWQK7QxJZ_tfMFBblR60ZEWNcKKU...	100 ms	39 ms	3.1 ms
maps.googleapis.com/maps-api-v3/api/js/64/9c/main.js	90 ms	60 ms	22 ms
/sites/gsa.gov/files/js/js_KllTCYhv7q9bVodHvxc4brFY45MoMg...	90 ms	45 ms	8.8 ms
dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js	81 ms	78 ms	1.2 ms
/sites/gsa.gov/files/js/js_dZSce4fyv5HMHNOhWwimqC5rl9B4Ly...	57 ms	42 ms	7.0 ms
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64k0h2	56 ms	19 ms	37 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	1.2 s
Other	533 ms
Style & Layout	333 ms
Script Parsing & Compilation	277 ms
Parse HTML & CSS	207 ms
Rendering	42 ms
Garbage Collection	15 ms

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.gsa.gov/system/files/768x428-6-Access.png	461.0 KiB
/ESWEnhancedChatChannel1770490368263/webruntime/view/5ba7...	394.5 KiB
www.gsa.gov/system/files/768x428-5-USEITActandOccupancyData.jpg	261.5 KiB
www.googletagmanager.com/gtag/js?id=G-HBYXWFP794&cx=c&gtm=4e64k0h2	155.4 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	147.1 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64k0h2	147.0 KiB
www.googletagmanager.com/gtm.js?id=GTM-W4SGTNW	146.5 KiB
www.gsa.gov/system/files/hp_buyingSelling2_500x152.png	132.7 KiB
www.gsa.gov/system/files/hp_buying2_500x152_mobile.png	122.6 KiB
/sites/gsa.gov/files/js/js_ynERFnCjSxXEMR6BIKrwpC3iUumKJu...	117.4 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL
Real Estate `ol.usa-page_categories > li.usa-page_category_item > p.margin-top-1 > img.width-full`	www.gsa.gov/system/files/hp_realestate_500x152_mobile.jpg
Buy Through Us `ol.usa-page_categories > li.usa-page_category_item > p.margin-top-1 > img.width-full`	www.gsa.gov/system/files/hp_buying2_500x152_mobile.png
Sell to Government `ol.usa-page_categories > li.usa-page_category_item > p.margin-top-1 > img.width-full`	www.gsa.gov/system/files/hp_buyingSelling2_500x152.png
Technology `ol.usa-page_categories > li.usa-page_category_item > p.margin-top-1 > img.width-full`	www.gsa.gov/system/files/hp_technology_500x152_mobile.jpg
GSA 250 year anniversary logo and seal `div.region > div.usa-logo > a#logo > img`	www.gsa.gov/sites/gsa.gov/themes/custom/gsa/250-Starmark-and-Seal_final.png
GSA logo `div.grid-row > div.usa-footer__logo > div.mobile-lg:grid-col-auto > img.usa-footer__logo-img`	www.gsa.gov/sites/gsa.gov/themes/custom/gsa/GSA-250-footer-logo.png
header.usa-banner__header > div.usa-banner__inner > div.grid-col-auto > img.usa-banner__header-flag `header.usa-banner__header > div.usa-banner__inner > div.grid-col-auto > img.usa-banner__header-flag`	www.gsa.gov/sites/gsa.gov/themes/custom/gsa/dist/img/us_flag_small.png
div.usa-alert > div.usa-alert__body > p.usa-alert__text > img.float-left `div.usa-alert > div.usa-alert__body > p.usa-alert__text > img.float-left`	www.gsa.gov/system/files/Freedom-250-Icon-RGB-TEXT-Color_web.png
footer.usa-footer > div.block > button.glossary_open > img `footer.usa-footer > div.block > button.glossary_open > img`	www.gsa.gov/modules/custom/glossary/img/icon-glossary.svg

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

●Optimize DOM size

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●User Timing marks and measures 14 user timings

●Avoid long main-thread tasks 12 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 130 ms

●Server Backend Latencies 70 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 20 ms

○INP breakdown

○Avoid non-composited animations

100

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.

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
2026 PAYROLL CALENDAR `div.grid-container > div.grid-row > div.desktop:grid-col-4 > a`
USE IT ACT AND OCCUPANCY DATA `div.grid-container > div.grid-row > div.desktop:grid-col-4 > a`

○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.

●Select elements have associated label elements.

●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

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

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

●Links are distinguishable without relying on color.

●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.

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

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

○`[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

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

○`<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

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

○`<object>` elements have alternate text

○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

○Identical links have the same purpose.

○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.

Best Practices

User Experience

Image natural dimensions should be proportional to the display size and the pixel ratio to maximize image clarity. Learn how to provide responsive images.

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Displayed size	Actual size	Expected size
div.usa-alert > div.usa-alert__body > p.usa-alert__text > img.float-left `div.usa-alert > div.usa-alert__body > p.usa-alert__text > img.float-left`	www.gsa.gov/system/files/Freedom-250-Icon-RGB-TEXT-Color_web.png	46 x 33	46 x 33	69 x 50

General

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

Source	Description
/visitor/v200/svrGP?pps=3&siteid=1311950425&ref=https%3A%...	`Failed to load resource: net::ERR_NAME_NOT_RESOLVED`
www.gsa.gov/sites/gsa.gov/themes/custom/gsa/favicon.ico	`Failed to load resource: the server responded with a status of 404 ()`

●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

●Page has the HTML doctype

●Properly defines charset

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

●Ensure CSP is effective against XSS attacks

●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

○Use a strong HSTS policy

○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

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 destination	Link Text
itvmo.gsa.gov/it-vehicles/	more info

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

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`