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

Audit breakdown by category with detailed findings.

44

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
web-static.archive.org/_static/waybackjs/vendors~main.5c55ac5c0b4418a2bfaf.js0.0 ms213.4 KiB
/_static/waybackjs/screenshots/wm_nfl.com_20131021073925.png0.0 ms202.3 KiB
/_static/waybackjs/screenshots/wm_wikihow.com_20131021205...0.0 ms174.8 KiB
/_static/waybackjs/screenshots/wm_bbc.co.uk_2013100100133...0.0 ms170.9 KiB
/_static/waybackjs/screenshots/wm_nbcnews.com_20131021172...0.0 ms166.8 KiB
/_static/waybackjs/screenshots/wm_cnet.com_20131021020703...0.0 ms164.9 KiB
/_static/waybackjs/screenshots/wm_aol.com_20131001050131.png0.0 ms159.7 KiB
/_static/waybackjs/screenshots/wm_deviantart.com_20131015...0.0 ms154.3 KiB
archive.org/includes/build/js/archive.min.js?v=dd67c3ca21600.0 s234.7 KiB
/_static/waybackjs/screenshots/wm_mashable.com_2013102102...0.0 ms147.7 KiB
/_static/waybackjs/screenshots/wm_goodreads.com_201310210...0.0 ms146.5 KiB
/_static/waybackjs/screenshots/wm_nytimes.com_20131001014...0.0 ms144.3 KiB
/_static/waybackjs/screenshots/wm_foodnetwork.com_2013102...0.0 ms143.7 KiB
/_static/waybackjs/screenshots/wm_amazon.com_200502040047...0.0 ms142.9 KiB
/_static/waybackjs/screenshots/wm_huffingtonpost.com_2013...0.0 ms142.1 KiB
/_static/waybackjs/screenshots/wm_buzzfeed.com_2013102117...0.0 ms141.0 KiB
/_static/waybackjs/screenshots/wm_feedmag.com_19961223105...0.0 ms138.0 KiB
/_static/waybackjs/screenshots/wm_imdb.com_20131021165347...0.0 ms137.1 KiB
/_static/waybackjs/screenshots/wm_foxnews.com_20131001010...0.0 ms135.8 KiB
/_static/waybackjs/screenshots/wm_bloomberg.com_201310012...0.0 ms131.4 KiB
/_static/waybackjs/screenshots/wm_etsy.com_20130601013852...0.0 ms127.6 KiB
/_static/waybackjs/screenshots/wm_yelp.com_20131019024453...0.0 ms126.8 KiB
/_static/waybackjs/screenshots/wm_spiegel.de_201310011526...0.0 ms123.5 KiB
/_static/waybackjs/screenshots/wm_w3schools.com_201310190...0.0 ms113.8 KiB
/_static/waybackjs/screenshots/wm_ubl.com_19961227203847.png0.0 ms113.3 KiB
/_static/waybackjs/screenshots/wm_geocities.com_199702221...0.0 ms111.9 KiB
/_static/waybackjs/screenshots/wm_reference.com_201310180...0.0 ms103.4 KiB
/_static/waybackjs/screenshots/wm_nasa.gov_19961231235847...0.0 ms98.0 KiB
/_static/waybackjs/screenshots/wm_cl.cam.ac.uk_2013010921...0.0 ms94.7 KiB
/_static/waybackjs/screenshots/wm_reddit.com_201310010315...0.0 ms93.9 KiB
/_static/waybackjs/screenshots/wm_yahoo.com_2011033105041...0.0 ms77.8 KiB
/_static/waybackjs/screenshots/wm_whitehouse.gov_19961227...0.0 ms74.3 KiB
/_static/waybackjs/screenshots/wm_stackoverflow.com_20131...0.0 ms71.4 KiB
/_static/waybackjs/screenshots/wm_obamaforillinois.com_20...0.0 ms70.0 KiB
/_static/waybackjs/screenshots/wm_well.com_19970108065337...0.0 ms57.6 KiB
web-static.archive.org/_static/waybackjs/main.e7b2354c86916e40324f.js0.0 ms41.5 KiB
archive.org/includes/build/css/archive.min.css?v=dd67c3ca21600.0 s57.0 KiB
/components/npm/@webcomponents/webcomponentsjs/webcompone...21600.0 s41.7 KiB
archive.org/includes/fonts/Iconochive-Regular.woff21600.0 s28.7 KiB
/_static/waybackjs/vendors~revolving-landing.6c6cf506f6ef...0.0 ms17.2 KiB
/_static/waybackjs/revolving-landing.24a29ffc5f9a6beff3ea...0.0 ms11.1 KiB
web-static.archive.org/_static/waybackjs/main.e7b2354c86916e40324f.css0.0 ms10.5 KiB
archive.org/includes/athena.js?v=dd67c3ca21600.0 s6.4 KiB
archive.org/includes/build/js/ia-topnav.min.js?v=dd67c3ca21600.0 s5.7 KiB
web-static.archive.org/_static/waybackjs/runtime.70559ba0c42caadaa575.js0.0 ms3.1 KiB
web-static.archive.org/_static/css/styles.css?v=HdpcXpRm0.0 ms1.8 KiB
web-static.archive.org/_static/css/web.css0.0 ms1.8 KiB
archive.org/components/npm/lit/polyfill-support.js?v=dd67c3ca21600.0 s2.8 KiB
archive.org/includes/apollo.js?v=dd67c3ca21600.0 s1.7 KiB
web-static.archive.org/_static/images/logo_archive-sm.png0.0 ms1.1 KiB
/_static/waybackjs/revolving-landing.24a29ffc5f9a6beff3ea...0.0 ms900 B
web-static.archive.org/_static/js/ui.js?v=7LYlZ-C20.0 ms753 B
/0.gif?cache_bust=0.1517254281450423&kind=track_js&track_...21600.0 s243 B

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
archive.org/includes/fonts/Iconochive-Regular.woff830 ms

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:566.988 label:Time to first byte subpart:timeToFirstByte] map[duration:2184.983 label:Element render delay subpart:elementRenderDelay]]
lhId: page-0-P
nodeLabel: The Wayback Machine is an initiative of the Internet Archive, a 501(c)(3) non-p…
path: 1,HTML,1,BODY,7,FOOTER,0,DIV,0,P
selector: body.navia > footer > div#footerHome > p
snippet: <p>

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

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
archive.org/includes/build/js/archive.min.js?v=dd67c3ca234.7 KiB1.7 s
/components/npm/@webcomponents/webcomponentsjs/webcompone...41.7 KiB563 ms
archive.org/includes/apollo.js?v=dd67c3ca1.7 KiB
archive.org/components/npm/lit/polyfill-support.js?v=dd67c3ca2.8 KiB
archive.org/includes/build/js/ia-topnav.min.js?v=dd67c3ca5.7 KiB
archive.org/includes/athena.js?v=dd67c3ca6.4 KiB
archive.org/includes/build/css/archive.min.css?v=dd67c3ca57.0 KiB2.3 s
web-static.archive.org/_static/waybackjs/vendors~main.5c55ac5c0b4418a2bfaf.js213.4 KiB2.2 s
web-static.archive.org/_static/js/ui.js?v=7LYlZ-C2753 B
web-static.archive.org/_static/waybackjs/runtime.70559ba0c42caadaa575.js3.1 KiB
web-static.archive.org/_static/waybackjs/main.e7b2354c86916e40324f.js41.5 KiB363 ms
web-static.archive.org/_static/waybackjs/main.e7b2354c86916e40324f.css10.5 KiB
web-static.archive.org/_static/css/web.css1.8 KiB181 ms
web-static.archive.org/_static/css/styles.css?v=HdpcXpRm1.8 KiB865 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
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_deviantart.com_20131015...153.8 KiB149.8 KiB
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_foodnetwork.com_2013102...143.3 KiB139.3 KiB
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_cl.cam.ac.uk_2013010921...94.2 KiB90.3 KiB
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_yahoo.com_2011033105041...77.4 KiB73.4 KiB

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

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.

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: 190 ms 54.6 KiB
URLTransfer SizeEst Savings
archive.org/includes/build/css/archive.min.css?v=dd67c3ca55.7 KiB54.6 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: 1.1 s 337.5 KiB
URLTransfer SizeEst Savings
archive.org/includes/build/js/archive.min.js?v=dd67c3ca233.3 KiB192.0 KiB
web-static.archive.org/_static/waybackjs/vendors~main.5c55ac5c0b4418a2bfaf.js212.6 KiB93.4 KiB
/components/npm/@webcomponents/webcomponentsjs/webcompone...40.4 KiB30.7 KiB
web-static.archive.org/_static/waybackjs/main.e7b2354c86916e40324f.js41.1 KiB21.4 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.

URLTotal CPU TimeScript EvaluationScript Parse
web-static.archive.org/_static/waybackjs/vendors~main.5c55ac5c0b4418a2bfaf.js2.9 s1.1 s98 ms
web.archive.org/1.5 s29 ms6.5 ms
Unattributable639 ms16 ms0.0 ms
web-static.archive.org/_static/waybackjs/main.e7b2354c86916e40324f.js445 ms422 ms20 ms
archive.org/includes/build/js/archive.min.js?v=dd67c3ca363 ms224 ms128 ms
/components/npm/@webcomponents/webcomponentsjs/webcompone...72 ms48 ms23 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.

CategoryTime Spent
Script Evaluation1.9 s
Other1.6 s
Rendering1.2 s
Style & Layout864 ms
Script Parsing & Compilation305 ms
Parse HTML & CSS102 ms
Garbage Collection23 ms

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 2.6 KiB
URLTransfer SizeEst Savings
archive.org/includes/athena.js?v=dd67c3ca5.0 KiB2.6 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
archive.org/includes/build/js/archive.min.js?v=dd67c3ca234.7 KiB
web-static.archive.org/_static/waybackjs/vendors~main.5c55ac5c0b4418a2bfaf.js213.4 KiB
/_static/waybackjs/screenshots/wm_nfl.com_20131021073925.png202.3 KiB
/_static/waybackjs/screenshots/wm_wikihow.com_20131021205...174.8 KiB
/_static/waybackjs/screenshots/wm_bbc.co.uk_2013100100133...170.9 KiB
/_static/waybackjs/screenshots/wm_nbcnews.com_20131021172...166.8 KiB
/_static/waybackjs/screenshots/wm_cnet.com_20131021020703...164.9 KiB
/_static/waybackjs/screenshots/wm_aol.com_20131001050131.png159.7 KiB
/_static/waybackjs/screenshots/wm_deviantart.com_20131015...154.3 KiB
/_static/waybackjs/screenshots/wm_mashable.com_2013102102...147.7 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
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_yelp.com_20131019024453...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_deviantart.com_20131015...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_cl.cam.ac.uk_2013010921...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_foodnetwork.com_2013102...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_yahoo.com_2011033105041...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_spiegel.de_201310011526...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_imdb.com_20131021165347...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_stackoverflow.com_20131...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_ubl.com_19961227203847.png
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_bloomberg.com_201310012...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_reference.com_201310180...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_feedmag.com_19961223105...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_wikihow.com_20131021205...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_nbcnews.com_20131021172...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_goodreads.com_201310210...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_obamaforillinois.com_20...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_geocities.com_199702221...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_amazon.com_200502040047...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_nytimes.com_20131001014...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_bbc.co.uk_2013100100133...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_huffingtonpost.com_2013...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_reddit.com_201310010315...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_cnet.com_20131021020703...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_whitehouse.gov_19961227...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_aol.com_20131001050131.png
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_etsy.com_20130601013852...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_foxnews.com_20131001010...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_well.com_19970108065337...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_w3schools.com_201310190...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_buzzfeed.com_2013102117...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_nasa.gov_19961231235847...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_mashable.com_2013102102...
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
/_static/waybackjs/screenshots/wm_nfl.com_20131021073925.png

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

●Layout shift culprits
●Document request latency
●Optimize DOM size
●Forced reflow
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Avoid long main-thread tasks 9 long tasks found
●Avoid non-composited animations 1 animated element found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 140 ms
●Server Backend Latencies 920 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Avoid multiple page redirects
●Initial server response time was short Root document took 270 ms
●Avoid large layout shifts 1 layout shift found
○INP breakdown
○LCP request discovery
○User Timing marks and measures
82

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.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
DONATE div.search-toolbar > div#donation-link > a.donation-button > span.beta_button
web pages div.search-toolbar > div.search-text-container > div.global-saved-web-pages-count > a
Wayback Machine Availability API div.features-columns > div.feature-column > div.web_box_itemlist > a
Chrome Extension div.features-columns > div.feature-column > div.web_box_itemlist > a
Firefox Add-on div.features-columns > div.feature-column > div.web_box_itemlist > a
Safari Extension div.features-columns > div.feature-column > div.web_box_itemlist > a
MS Edge Add-on div.features-columns > div.feature-column > div.web_box_itemlist > a
iOS app div.features-columns > div.feature-column > div.web_box_itemlist > a
Android app div.features-columns > div.feature-column > div.web_box_itemlist > a
Visit Archive-It to build and browse the collections. div.revolving-landing > div.features-columns > div.feature-column > a
selected Collections div.feature-column > div.feature-content > p > a
FAQ body.navia > div#react-wayback-search > div.wbs__web_footer > a.footer-item
Contact Us body.navia > div#react-wayback-search > div.wbs__web_footer > a.footer-item
Terms of Service (Dec 31, 2014) body.navia > div#react-wayback-search > div.wbs__web_footer > a.footer-item

These are opportunities to improve the legibility of your content.

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
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.features-columns > div.feature-column > div.web_heading > img.web_img div.features-columns > div.feature-column > div.web_heading > img.web_img
div.features-columns > div.feature-column > div.web_heading > img.web_img div.features-columns > div.feature-column > div.web_heading > img.web_img
div.features-columns > div.feature-column > div.web_heading > img.web_img div.features-columns > div.feature-column > div.web_heading > img.web_img

Form elements without effective labels can create frustrating experiences for screen reader users. Learn more about the `select` element.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
.gov PDFs .gov web pages CIA World Factbook COVID Donald Trump's Tweets End Of … div.feature-column > div.feature-content > form > select.web-save-url-input

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
logo: Internet Archive's Wayback Machine div#react-wayback-search > div.search-toolbar > div.search-toolbar-logo-container > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a
div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a div.caroufredsel_wrapper > div.web_carousel > div.web_capture > a

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.

Best practices

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-*]` 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
●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.
●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
●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.
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●Deprecated ARIA roles were not used
●The page contains a heading, skip link, or landmark region
●ARIA IDs are unique
○`[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
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○Heading elements appear in a sequentially-descending order
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○`<input type="image">` elements have `[alt]` text
○Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
○List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
○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
○Image elements do not have `[alt]` attributes that are redundant text.
○Identical links have the same purpose.
○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.
92

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.

URLDisplayed sizeActual sizeExpected size
div.features-columns > div.feature-column > div.web_heading > img.web_img div.features-columns > div.feature-column > div.web_heading > img.web_img
48 x 4855 x 5572 x 72

Browser Compatibility

A character encoding declaration is required. It can be done with a `<meta>` tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header. Learn more about declaring the character encoding.

Why this matters

Performance issues directly impact user engagement and conversion rates.

General

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
archive.org/includes/build/js/archive.min.js?v=dd67c3caarchive.org/includes/build/js/archive.min.js.map
archive.org/includes/build/js/ia-topnav.min.js?v=dd67c3caarchive.org/includes/build/js/ia-topnav.min.js.map
/components/npm/@webcomponents/webcomponentsjs/webcompone.../components/npm/@webcomponents/webcomponentsjs/webcompone...
/_static/waybackjs/vendors~revolving-landing.6c6cf506f6ef.../_static/waybackjs/vendors~revolving-landing.6c6cf506f6ef...
web-static.archive.org/_static/waybackjs/vendors~main.5c55ac5c0b4418a2bfaf.js/_static/waybackjs/vendors~main.5c55ac5c0b4418a2bfaf.js.map
web-static.archive.org/_static/waybackjs/runtime.70559ba0c42caadaa575.jsweb-static.archive.org/_static/waybackjs/runtime.70559ba0c42caadaa575.js.map
/_static/waybackjs/revolving-landing.24a29ffc5f9a6beff3ea.../_static/waybackjs/revolving-landing.24a29ffc5f9a6beff3ea...
web-static.archive.org/_static/waybackjs/main.e7b2354c86916e40324f.jsweb-static.archive.org/_static/waybackjs/main.e7b2354c86916e40324f.js.map
archive.org/components/npm/lit/polyfill-support.js?v=dd67c3caarchive.org/components/npm/lit/polyfill-support.js.map
●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
●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 clickjacking with XFO or CSP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
○Redirects HTTP traffic to HTTPS
73

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.

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
archive.org/about/More
www.archive-it.org/blog/learn-more/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
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.web_carousel > div.web_capture > a > img.web_capture_img div.web_carousel > div.web_capture > a > img.web_capture_img
div.features-columns > div.feature-column > div.web_heading > img.web_img div.features-columns > div.feature-column > div.web_heading > img.web_img
div.features-columns > div.feature-column > div.web_heading > img.web_img div.features-columns > div.feature-column > div.web_heading > img.web_img
div.features-columns > div.feature-column > div.web_heading > img.web_img div.features-columns > div.feature-column > div.web_heading > img.web_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
●Page has successful HTTP status code
●Links are crawlable
●Document has a valid `hreflang`
○robots.txt is valid
○Document has a valid `rel=canonical`

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