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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.

85

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.usps.com/assets/images/welcome/carousel/apr26-stamps.png0.0 ms1.9 MiB
www.usps.com/assets/images/welcome/carousel/apr26-cards.png0.0 ms1.0 MiB
www.usps.com/assets/images/welcome/carousel/apr26-gifts.png0.0 ms286.2 KiB
www.usps.com/assets/images/welcome/featured/passport-luggage.jpg0.0 ms158.3 KiB
www.usps.com/assets/images/welcome/premium/id-app-m.jpg0.0 ms126.0 KiB
www.usps.com/assets/images/welcome/premium/id-app.jpg0.0 ms112.6 KiB
/signals/config/533374513433337?v=2.9.298&r=stable&domain...1200.0 s127.0 KiB
www.usps.com/assets/images/welcome/featured/cns26-34.jpg0.0 ms111.9 KiB
www.usps.com/W0ci2XILbs/gI8D0ObD/fB/hibukfp0ELJDXD3kXY/cw0VPRww/OzB/yLgsuPigB21600.0 s169.6 KiB
www.usps.com/assets/images/welcome/featured/birthday.jpg0.0 ms105.3 KiB
connect.facebook.net/en_US/fbevents.js1200.0 s96.4 KiB
www.usps.com/assets/images/welcome/featured/po-boxes-box.jpg0.0 ms77.0 KiB
www.usps.com/assets/images/welcome/carousel/sustain-supplies-dotcom8.jpg0.0 ms64.6 KiB
www.usps.com/assets/fonts/d5af76d8-a90b-4527-b3a3-182207cc3250.woff0.0 ms58.1 KiB
www.usps.com/assets/fonts/5b4a262e-3342-44e2-8ad7-719998a68134.woff0.0 ms51.3 KiB
www.usps.com/assets/fonts/4a9c62ab-b359-4081-8383-a0d1cdebd111.woff0.0 ms46.4 KiB
www.usps.com/assets/images/welcome/featured/250-landing-promo-m.jpg0.0 ms37.2 KiB
www.usps.com/assets/images/welcome/featured/250-landing-promo.jpg0.0 ms36.3 KiB
www.usps.com/store/go-now.png0.0 ms31.6 KiB
/js/current/dpm_pixel_min.js?aid=nbc_usps_1351-d4f85824-4...0.0 ms31.6 KiB
www.usps.com/assets/script/globals/jquery.min.js0.0 ms31.0 KiB
www.usps.com/global-elements/footer/script/jquery-3.7.1.js0.0 ms30.4 KiB
cdn.boomtrain.com/p13n/usps-united-states-postal-service/p13n.min.js3600.0 s31.2 KiB
www.usps.com/international/go-now.png0.0 ms22.3 KiB
www.usps.com/ship/go-now.png0.0 ms20.6 KiB
www.usps.com/business/go-now.png0.0 ms20.2 KiB
www.redditstatic.com/ads/pixel.js60.0 s19.0 KiB
www.usps.com/assets/images/campaigns/postmark/postmark-home.png0.0 ms17.6 KiB
www.usps.com/assets/script/globals/bootstrap.js0.0 ms15.8 KiB
c.amazon-adsystem.com/aat/amzn.js0.0 ms8.9 KiB
www.usps.com/manage/go-now.png0.0 ms8.5 KiB
snap.licdn.com/li.lms-analytics/insight.min.js86400.0 s18.7 KiB
www.usps.com/assets/script/globals/popper.min.js0.0 ms7.4 KiB
www.usps.com/global-elements/lib/script/requirejs/require-2.3.6.js0.0 ms7.2 KiB
www.usps.com/global-elements/footer/images/footer-logo.png0.0 ms6.0 KiB
c1.rfihub.net/js/tc.min.js3600.0 s6.5 KiB
www.usps.com/global-elements/header/script/ge-login.js0.0 ms3.5 KiB
www.usps.com/global-elements/header/script/megamenu-v3.js0.0 ms3.5 KiB
www.usps.com/global-elements/footer/images/instagram_logo.png0.0 ms3.5 KiB
www.usps.com/global-elements/footer/images/pinterest_logo.png0.0 ms3.3 KiB
www.usps.com/assets/images/home/ssm-icon.svg0.0 ms3.2 KiB
www.usps.com/assets/images/home/chinese_characters.gif0.0 ms2.8 KiB
www.usps.com/global-elements/header/images/book-passport-appt.svg0.0 ms2.8 KiB
s.pinimg.com/ct/lib/main.10d2511a.js1209600.0 s27.3 KiB
/sync?c=16b6410431b6374e780104abb0443ca8&p=cd073bead397e7...0.0 ms2.5 KiB
www.usps.com/global-elements/footer/images/facebook_logo.png0.0 ms2.5 KiB
www.usps.com/global-elements/footer/images/threads_logo.png0.0 ms2.5 KiB
/global-elements/header/images/icon-personalize-stamped-e...0.0 ms2.3 KiB
www.usps.com/global-elements/header/images/utility-header/logo-sb.svg0.0 ms2.3 KiB
www.usps.com/global-elements/header/images/schedule-redelivery.svg0.0 ms2.3 KiB
www.usps.com/assets/images/welcome/scroll-red.png0.0 ms2.2 KiB
www.usps.com/assets/images/home/utility_languages.png0.0 ms2.1 KiB
www.usps.com/assets/images/home/hs-code-search.svg0.0 ms2.0 KiB
www.usps.com/global-elements/footer/images/x_logo.png0.0 ms2.0 KiB
www.usps.com/assets/images/home/utility_customer_service.png0.0 ms2.0 KiB
www.usps.com/test/nav/images/shipping-supplies.svg0.0 ms2.0 KiB
www.usps.com/global-elements/header/images/transit-time.svg0.0 ms2.0 KiB
www.usps.com/assets/images/home/location.svg0.0 ms1.9 KiB
www.usps.com/ContentTemplates/common/scripts/OneLinkUsps.js0.0 ms1.8 KiB
www.usps.com/test/nav/images/cards-and-envelopes.svg0.0 ms1.8 KiB
www.usps.com/assets/images/home/printcustomsforms.svg0.0 ms1.7 KiB
ct.pinterest.com/static/ct/token_create.js7200.0 s2.2 KiB
www.usps.com/global-elements/header/script/search-fe.js0.0 ms1.6 KiB
www.usps.com/assets/images/home/change_address.svg0.0 ms1.6 KiB
www.usps.com/assets/images/home/schedule_pickup.svg0.0 ms1.6 KiB
www.usps.com/assets/images/home/logo_mobile.svg0.0 ms1.6 KiB
www.usps.com/global-elements/header/images/utility-header/mailman.svg0.0 ms1.6 KiB
www.usps.com/global-elements/footer/images/youtube_logo.png0.0 ms1.6 KiB
s.pinimg.com/ct/core.js7200.0 s2.1 KiB
www.usps.com/assets/images/home/po_box.svg0.0 ms1.6 KiB
www.usps.com/assets/images/home/tracking.svg0.0 ms1.5 KiB
www.usps.com/global-elements/header/images/package-intercept.svg0.0 ms1.5 KiB
www.usps.com/assets/images/home/search.svg0.0 ms1.5 KiB
www.usps.com/global-elements/header/images/utility-header/search.svg0.0 ms1.5 KiB
www.usps.com/assets/images/home/find_zip.svg0.0 ms1.5 KiB
www.usps.com/assets/images/home/calculate_price.svg0.0 ms1.5 KiB
www.usps.com/assets/images/home/holdmail.svg0.0 ms1.5 KiB
www.usps.com/test/nav/images/business.svg0.0 ms1.4 KiB
analytics-sm.com/js/v1/beacon.js600.0 s1.5 KiB
www.usps.com/assets/images/home/free_boxes.svg0.0 ms1.4 KiB
www.usps.com/test/nav/images/gifts.svg0.0 ms1.3 KiB
www.usps.com/test/nav/images/collectors.svg0.0 ms1.3 KiB
www.usps.com/assets/images/home/stamps.svg0.0 ms1.3 KiB
www.usps.com/assets/script/home/megamenu-additions.js0.0 ms1.2 KiB
www.usps.com/assets/images/home/featured_clicknship.svg0.0 ms1.2 KiB
www.usps.com/global-elements/lib/script/resize-manager.js0.0 ms1.2 KiB
www.usps.com/assets/script/welcome/welcome.js0.0 ms1.1 KiB
www.usps.com/component-guide/blue-caret.svg0.0 ms1.1 KiB
www.usps.com/global-elements/lib/script/helpers.js0.0 ms1.1 KiB
www.usps.com/global-elements/header/script/header-search.js0.0 ms1.1 KiB
fast.fonts.net/t/trackingCode.js300.0 s1.1 KiB
www.usps.com/assets/images/home/hamburger.svg0.0 ms1.0 KiB
www.usps.com/global-elements/lib/script/require-jquery.js0.0 ms835 B
/collect?v=2&fmt=js&pid=4321490&time=1776363082933&url=ht...0.0 ms693 B
/snoo.gif?q=CAAHAAABAAoACQAAAA8sjYvfAA==&s=758ZB25Erv8S36...0.0 ms634 B
/pixel?c=bd8618c307ae9885a12561b7191e2cea&cid=51400849381...0.0 ms622 B
/t/1.css?apiType=css&projectid=f3e4655b-fd06-4b8b-8a25-01...1.0 s498 B
/config/com/cc41fce6-e245-447e-b170-1c36414f246a.js?v=3.5...0.0 ms466 B
ps.eyeota.net/match?uid=5141210838479574944&bid=omt9pi00.0 ms354 B
/pixel/capture?tags=8dd8cf55-3ae9-49dc-a25a-83dcfc60de58&...0.0 ms184 B
partners.tremorhub.com/sync?UIRF=5140084938187138101&r=qJqF_YvHj2Pf0.0 ms175 B
/rp.gif?ts=1776363082924&id=t2_txtps67&event=PageVisit&m....0.0 ms107 B
/tr/?id=533374513433337&ev=PageView&dl=https%3A%2F%2Fwww....0.0 ms16 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.

URLEst Savings
www.usps.com/assets/fonts/4a9c62ab-b359-4081-8383-a0d1cdebd111.woff145 ms
www.usps.com/assets/fonts/5b4a262e-3342-44e2-8ad7-719998a68134.woff100 ms
www.usps.com/assets/fonts/d5af76d8-a90b-4527-b3a3-182207cc3250.woff95 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:48.423 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-DIV
nodeLabel: Informed Delivery® at Your Fingertips Always know the status of your USPS deli…
path: 1,HTML,1,BODY,25,DIV
selector: body > div.jumbotron
snippet: <div class="jumbotron premium track-opt" style="height: 400px; background-size: auto 400px; background-image: url(&quot;/assets…&quot;);" data-gtm-section="premium" data-gtm-vis-recent-on-screen2384666_2691="644" data-gtm-vis-first-on-screen2384666_2691="645" data-gtm-vis-total-visible-time2384666_2691="100" data-gtm-vis-has-fired2384666_2691="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
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
value: No additional origins are good candidates for preconnecting

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
Forever Stamps available from The Postal Store. div#usps-carousel > div.carousel-inner > div.carousel-item > img.d-block
www.usps.com/assets/images/welcome/carousel/apr26-stamps.png1.9 MiB1.9 MiB
A person holding up a passport with luggage in the background. div.container-fluid > div.row > div.col-lg-7 > img
www.usps.com/assets/images/welcome/featured/passport-luggage.jpg157.6 KiB107.8 KiB
Person placing a label on a package. div.container-fluid > div.row > div.col-lg-7 > img
www.usps.com/assets/images/welcome/featured/cns26-34.jpg111.2 KiB61.7 KiB
Happy Birthday Forever Stamp. div.container-fluid > div.row > div.col-lg-7 > img
www.usps.com/assets/images/welcome/featured/birthday.jpg104.6 KiB55.5 KiB
An open PO Box with mail inside and a key in the lock. div.container-fluid > div.row > div.col-lg-7 > img
www.usps.com/assets/images/welcome/featured/po-boxes-box.jpg76.3 KiB27.3 KiB
A postmark stamp that shows a cancellation date of January 13, 2026, in New Yor… div.inpage-alert > div.container-fluid > div.alert-p > img
www.usps.com/assets/images/campaigns/postmark/postmark-home.png16.9 KiB15.2 KiB
USPS 250th anniversary. Delivering since 1775. Celebrate 250 years of USPS! Exp… div > div.container-fluid > a > img.d-lg-block
www.usps.com/assets/images/welcome/featured/250-landing-promo.jpg35.6 KiB13.0 KiB
body > div#global-footer--wrap > footer.global-footer > a.global-footer--logo-link body > div#global-footer--wrap > footer.global-footer > a.global-footer--logo-link
www.usps.com/global-elements/footer/images/footer-logo.png5.3 KiB4.3 KiB

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 Size
www.usps.com/assets/css/welcome/bootstrap.css26.6 KiB
www.usps.com/global-elements/header/css/megamenu-v4.css8.0 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: 574 ms
URLTime Spent
usps.com/574 ms
www.usps.com/0.0 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: 40 ms 24.2 KiB
URLTransfer SizeEst Savings
www.usps.com/assets/css/welcome/bootstrap.css25.9 KiB24.2 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: 40 ms 400.1 KiB
URLTransfer SizeEst Savings
www.googletagmanager.com/gtm.js?id=GTM-MVCC8H210.0 KiB66.3 KiB
www.googletagmanager.com/gtag/destination?id=DC-3976941&cx=c&gtm=4e64f0129.2 KiB64.8 KiB
www.googletagmanager.com/gtag/js?id=AW-978081151141.3 KiB62.8 KiB
www.googletagmanager.com/gtm.js?id=GTM-K2FRZL4&gtm=4e64f0160.7 KiB58.2 KiB
www.usps.com/W0ci2XILbs/gI8D0ObD/fB/hibukfp0ELJDXD3kXY/cw0VPRww/OzB/yLgsuPigB168.7 KiB37.3 KiB
/signals/config/533374513433337?v=2.9.298&r=stable&domain...126.9 KiB36.8 KiB
connect.facebook.net/en_US/fbevents.js96.3 KiB33.8 KiB
www.usps.com/global-elements/footer/script/jquery-3.7.1.js29.7 KiB20.1 KiB
www.usps.com/assets/script/globals/jquery.min.js30.2 KiB20.1 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
www.usps.com/assets/images/welcome/carousel/apr26-stamps.png1.9 MiB
www.usps.com/assets/images/welcome/carousel/apr26-cards.png1.0 MiB
www.usps.com/assets/images/welcome/carousel/apr26-gifts.png286.2 KiB
www.googletagmanager.com/gtm.js?id=GTM-MVCC8H210.3 KiB
www.usps.com/W0ci2XILbs/gI8D0ObD/fB/hibukfp0ELJDXD3kXY/cw0VPRww/OzB/yLgsuPigB169.6 KiB
www.googletagmanager.com/gtm.js?id=GTM-K2FRZL4&gtm=4e64f0160.7 KiB
www.usps.com/assets/images/welcome/featured/passport-luggage.jpg158.3 KiB
www.googletagmanager.com/gtag/js?id=AW-978081151141.4 KiB
www.googletagmanager.com/gtag/destination?id=DC-3976941&cx=c&gtm=4e64f0129.3 KiB
/signals/config/533374513433337?v=2.9.298&r=stable&domain...127.0 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
Forever Stamps available from The Postal Store. div#usps-carousel > div.carousel-inner > div.carousel-item > img.d-block
www.usps.com/assets/images/welcome/carousel/apr26-stamps.png
A person holding up a passport with luggage in the background. div.container-fluid > div.row > div.col-lg-7 > img
www.usps.com/assets/images/welcome/featured/passport-luggage.jpg
Person placing a label on a package. div.container-fluid > div.row > div.col-lg-7 > img
www.usps.com/assets/images/welcome/featured/cns26-34.jpg
Happy Birthday Forever Stamp. div.container-fluid > div.row > div.col-lg-7 > img
www.usps.com/assets/images/welcome/featured/birthday.jpg
An open PO Box with mail inside and a key in the lock. div.container-fluid > div.row > div.col-lg-7 > img
www.usps.com/assets/images/welcome/featured/po-boxes-box.jpg
USPS 250th anniversary. Delivering since 1775. Celebrate 250 years of USPS! Exp… div > div.container-fluid > a > img.d-lg-block
www.usps.com/assets/images/welcome/featured/250-landing-promo.jpg
ul > div.desktop-only > a > img
www.usps.com/manage/go-now.png
ul.tools > div.desktop-only > a > img
www.usps.com/international/go-now.png
ul.tools > div.desktop-only > a > img
www.usps.com/business/go-now.png
ul > div.desktop-only > a > img
www.usps.com/store/go-now.png
ul > div.desktop-only > a > img
www.usps.com/ship/go-now.png
Stamp Icon Link for Buy Stamps div.col-lg-2 > div.article > a > img.mx-auto
www.usps.com/assets/images/home/stamps.svg
Mail Carrier Icon Link for Informed Delivery div.col-lg-2 > div.article > a > img.mx-auto
www.usps.com/global-elements/header/images/utility-header/mailman.svg
Printer Icon Link for Click-N-Ship div.col-lg-2 > div.article > a > img.mx-auto
www.usps.com/assets/images/home/featured_clicknship.svg
A postmark stamp that shows a cancellation date of January 13, 2026, in New Yor… div.inpage-alert > div.container-fluid > div.alert-p > img
www.usps.com/assets/images/campaigns/postmark/postmark-home.png
Image of USPS.com logo. div#g-navigation > div.nav-full > a.global-logo > img
www.usps.com/global-elements/header/images/utility-header/logo-sb.svg
Image of Threads social media icon. ul.global-footer--social > li > a > img
www.usps.com/global-elements/footer/images/threads_logo.png
Image of X social media icon. ul.global-footer--social > li > a > img
www.usps.com/global-elements/footer/images/x_logo.png
Image of Facebook social media icon. ul.global-footer--social > li > a > img
www.usps.com/global-elements/footer/images/facebook_logo.png
Image of instagram social media icon. ul.global-footer--social > li > a > img
www.usps.com/global-elements/footer/images/instagram_logo.png
Image of Pinterest social media icon. ul.global-footer--social > li > a > img
www.usps.com/global-elements/footer/images/pinterest_logo.png
Image of Youtube social media icon. ul.global-footer--social > li > a > img
www.usps.com/global-elements/footer/images/youtube_logo.png
body > img body > img
/pixel/capture?tags=8dd8cf55-3ae9-49dc-a25a-83dcfc60de58&...

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
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●User Timing marks and measures 1 user timing
●JavaScript execution time 0.7 s
●Minimizes main-thread work 1.6 s
●Avoid long main-thread tasks 3 long tasks found
●Avoid non-composited animations 20 animated elements found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 120 ms
●Server Backend Latencies 300 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 20 ms
●Avoid large layout shifts 4 layout shifts found
○INP breakdown
68

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.

ARIA

Each ARIA `role` supports a specific subset of `aria-*` attributes. Mismatching these invalidates the `aria-*` attributes. Learn how to match ARIA attributes to their roles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Slide 1 div#usps-carousel > div.carousel-inner > ol.carousel-indicators > li.active
Slide 2 div#usps-carousel > div.carousel-inner > ol.carousel-indicators > li
Slide 3 div#usps-carousel > div.carousel-inner > ol.carousel-indicators > li
Slide 4 div#usps-carousel > div.carousel-inner > ol.carousel-indicators > li

Some ARIA parent roles must contain specific child roles to perform their intended accessibility functions. Learn more about roles and required children elements.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Skip Quick Tools Links Quick Tools Track a Package Informed Delivery F… div#g-navigation > div.nav-full > nav > ul.nav-list

Some ARIA child roles must be contained by specific parent roles to properly perform their intended accessibility functions. Learn more about ARIA roles and required parent element.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Quick Tools nav > ul.nav-list > li.qt-nav > a.nav-first-element
Send nav > ul.nav-list > li.menuheader > a#mail-ship-width
Receive nav > ul.nav-list > li.menuheader > a.menuitem
Shop nav > ul.nav-list > li.menuheader > a.menuitem
Business nav > ul.nav-list > li.menuheader > a.menuitem
International nav > ul.nav-list > li.menuheader > a.menuitem
Help nav > ul.nav-list > li.menuheader > a.menuitem
Search USPS.com nav > ul.nav-list > li.nav-search > a.menuitem
PO BOXES div.empty-search > ul > li > a
PASSPORTS div.empty-search > ul > li > a
FREE BOXES div.empty-search > ul > li > a
PO BOXES div.empty-search > ul > li > a
PASSPORTS div.empty-search > ul > li > a
FREE BOXES div.empty-search > ul > li > a

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Names and labels

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
body > img body > img

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
  body > div#g-navigation > div.nav-full > a#endnav
USPS 250th anniversary. Delivering since 1775. Celebrate 250 years of USPS! Exp… section.jumbotron > div > div.container-fluid > a
body > div#global-footer--wrap > footer.global-footer > a.global-footer--logo-link body > div#global-footer--wrap > footer.global-footer > a.global-footer--logo-link

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Tables and lists

Screen readers require list items (`<li>`) to be contained within a parent `<ul>`, `<ol>` or `<menu>` to be announced properly. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Skip Quick Tools Links Quick Tools Track a Package Informed Delivery F… div.nav-full > nav > ul.nav-list > li.qt-nav
Skip Send Links Send Tools Click-N-Ship Stamps & Supplies Look Up a ZIP Code™ C… div.nav-full > nav > ul.nav-list > li.menuheader
Skip Receive Links Receive Tools Tracking Informed Delivery Intercept a Package… div.nav-full > nav > ul.nav-list > li.menuheader
Skip Shop Links Shop Shop Stamps Shipping Supplies Cards & Envelopes Personaliz… div.nav-full > nav > ul.nav-list > li.menuheader
Skip Business Links Business Tools Calculate a Business Price Every Door Direct… div.nav-full > nav > ul.nav-list > li.menuheader
Skip International Links International Tools Calculate International Prices Pri… div.nav-full > nav > ul.nav-list > li.menuheader
Skip Help Links Help FAQs Finding Missing Mail Filing a Claim Requesting a Refu… div.nav-full > nav > ul.nav-list > li.menuheader
Skip Search Search USPS.com Search USPS.com Search USPS.com Top Searches PO B… div.nav-full > nav > ul.nav-list > li.nav-search
Slide 1 div#usps-carousel > div.carousel-inner > ol.carousel-indicators > li.active
Slide 2 div#usps-carousel > div.carousel-inner > ol.carousel-indicators > li
Slide 3 div#usps-carousel > div.carousel-inner > ol.carousel-indicators > li
Slide 4 div#usps-carousel > div.carousel-inner > ol.carousel-indicators > li

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Best practices

Disabling zooming is problematic for users with low vision who rely on screen magnification to properly see the contents of a web page. Learn more about the viewport meta tag.

Why this matters

Informational: a Permissions-Policy directive showing feature -> allowed origins.

Source: MDN Permissions-Policy

Failing Elements
head > meta head > meta

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
Contact Us li.global-footer--navigation-category > ol.global-footer--navigation-options > li > a
Site Index li.global-footer--navigation-category > ol.global-footer--navigation-options > li > a
FAQs li.global-footer--navigation-category > ol.global-footer--navigation-options > li > a
Feedback li.global-footer--navigation-category > ol.global-footer--navigation-options > li > a
USPS Service Updates li.global-footer--navigation-category > ol.global-footer--navigation-options > li > a
Forms & Publications li.global-footer--navigation-category > ol.global-footer--navigation-options > li > a
Government Services li.global-footer--navigation-category > ol.global-footer--navigation-options > li > a
Rights & Permissions li.global-footer--navigation-category > ol.global-footer--navigation-options > li > a
Postal Inspectors li.global-footer--navigation-category > ol.global-footer--navigation-options > li > a
Inspector General li.global-footer--navigation-category > ol.global-footer--navigation-options > li > a
Postal Explorer li.global-footer--navigation-category > ol.global-footer--navigation-options > li > a
National Postal Museum li.global-footer--navigation-category > ol.global-footer--navigation-options > li > a
Resources for Developers li.global-footer--navigation-category > ol.global-footer--navigation-options > li > a
Privacy Policy li.global-footer--navigation-category > ol.global-footer--navigation-options > li > a
Terms of Use li.global-footer--navigation-category > ol.global-footer--navigation-options > li > a

One main landmark helps screen reader users navigate a web page. Learn more about landmarks.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html html

These items highlight common accessibility best practices.

○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-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
●Input buttons have discernible text.
●Form elements have associated labels
●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.
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●No element has a `[tabindex]` value greater than 0
●Heading elements appear in a sequentially-descending order
●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 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 type="image">` elements have `[alt]` text
○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.
○Elements with visible text labels have matching accessible names.
○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.
73

Best Practices

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
AttributionReporting
snap.licdn.com/li.lms-analytics/insight.min.js
SharedStorage
c.amazon-adsystem.com/aat/amzn.js line 1, col 7935

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.

SourceDescription
www.usps.com/
Attestation check for Shared Storage on https://ara.paa-reporting-advertising.amazon failed.
www.usps.com/W0ci2XILbs/gI8D0ObD/fB/hibukfp0ELJDXD3kXY/cw0VPRww/OzB/yLgsuPigB
Creating a worker from 'blob:https://www.usps.com/54af9f0e-2b4c-40fa-9eb0-46935dddacdb' violates the following Content Security Policy directive: "script-src 'self' 'unsafe-inline' 'unsafe-eval' https:". Note that 'worker-src' was not explicitly set, so 'script-src' is used as a fallback. The action has been blocked.

Issues logged to the `Issues` panel in Chrome Devtools indicate unresolved problems. They can come from network request failures, insufficient security controls, and other browser concerns. Open up the Issues panel in Chrome DevTools for more details on each issue.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Issue type
Content security policy

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLMap URL
www.usps.com/W0ci2XILbs/gI8D0ObD/fB/hibukfp0ELJDXD3kXY/cw0VPRww/OzB/yLgsuPigB
www.usps.com/assets/script/globals/popper.min.jswww.usps.com/assets/script/globals/popper.min.js.map
www.usps.com/assets/script/globals/bootstrap.jswww.usps.com/assets/script/globals/bootstrap.min.js.map
s.pinimg.com/ct/lib/main.10d2511a.jss.pinimg.com/ct/lib/main.10d2511a.js.map
s.pinimg.com/ct/core.jss.pinimg.com/ct/core.js.map
ct.pinterest.com/static/ct/token_create.jsct.pinterest.com/static/ct/token_create.js.map
●Uses HTTPS
●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
●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
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
85

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.usps.com/manage/informed-delivery.htmLearn More
www.usps.com/manage/informed-delivery.htmLearn More
/s/article/Requirements-and-Standards-for-Sending-Domesti...Learn more

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
body > img body > img

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
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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