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· 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.

62

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
/uam/media/imgm/1607029033883/la-uam-en-el-top-100mejores...0.0 ms796.9 KiB
www.uam.es/estaticos/UAM-R/js/scripts.min.js?v=130.0 ms476.6 KiB
www.uam.es/estaticos/UAM-R/css/uam.min.css?v=130.0 ms452.8 KiB
www.uam.es/uam/media/img/1606928370518/infografia-consumo-19-5-23.svg0.0 ms405.4 KiB
www.uam.es/uam/media/img/1606995215633/portada-23-24.svg0.0 ms217.5 KiB
www.uam.es/uam/media/imgxl/1606852113446/pm2-1920x750.jpg0.0 ms183.6 KiB
www.uam.es/uam/media/imgm/1607033349710/2026-04-21-gonzalez-beltran-img.jpg0.0 ms51.9 KiB
/uam/media/imgs/1607032085952/purple-orange-modern-abstra...0.0 ms50.1 KiB
www.uam.es/uam/media/imgm/1606903067572/fotoccd.jpg0.0 ms40.0 KiB
/uam/media/imgm/1606937915229/imagenuamantecrisishumanita...0.0 ms38.1 KiB
www.uam.es/estaticos/UAM-R/js/wcs.js?v=130.0 ms27.7 KiB
www.uam.es/uam/media/imgm/1606859313941/banner-agenda-2024.jpg0.0 ms19.8 KiB
www.uam.es/uam/media/imgs/1607031525181/1.-mesa-de-portavoces-ceuam-2026.jpeg0.0 ms19.3 KiB
www.uam.es/uam/media/img/1606893064532/marcauam-ahorizontalcolor-imp.svg0.0 ms16.9 KiB
www.uam.es/uam/media/imgs/1607032400126/voluntariado-web.jpg0.0 ms16.7 KiB
www.uam.es/uam/media/imgs/1607032375722/fifimac.jpg0.0 ms16.4 KiB
www.uam.es/uam/media/imgs/1607033328935/jpa.jpg0.0 ms14.0 KiB
ssl.google-analytics.com/ga.js7200.0 s17.4 KiB
www.uam.es/uam/media/img/1606848842005/santander-logo-color-01.png0.0 ms12.0 KiB
www.uam.es/uam/media/img/1606848842193/fue-logo-color-01.png0.0 ms11.5 KiB
www.uam.es/uam/media/imgs/1607032078382/2026-04-16-arnanz-csic.jpg0.0 ms11.1 KiB
www.uam.es/estaticos/Comun/fonts/uam-icons/uam-icons.woff2?512174620.0 ms7.7 KiB
www.uam.es/uam/media/imgs/1607032075390/2026-04-14-suderov-ifimac-img.jpg0.0 ms7.4 KiB
www.uam.es/uam/media/imgs/1607032081544/2026-04-17-barbera-rjb-jpg.jpg0.0 ms7.2 KiB
www.uam.es/uam/media/img/1606848842439/hr-logo-color-01.png0.0 ms6.4 KiB
www.uam.es/uam/media/img/1606957595533/parquecientifico.png0.0 ms5.7 KiB
www.uam.es/uam/media/img/1606848841888/universia-logo-color-01.png0.0 ms5.3 KiB
www.uam.es/uam/media/img/1606893866850/uam-solo.svg0.0 ms3.1 KiB
www.uam.es/estaticos/UAM-R/js/analytics.js?v=130.0 ms1.9 KiB
www.uam.es/estaticos/UAM-R/videos/video-home.mp40.0 ms0 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.uam.es/estaticos/Comun/fonts/uam-icons/uam-icons.woff2?51217462175 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:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:49.211 source:map[column:52 line:996 type:source-location url:https://www.uam.es/estaticos/UAM-R/js/scripts.min.js?v=13 urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:36.824 source:map[column:376 line:843 type:source-location url:https://www.googletagmanager.com/gtag/js?id=G-5TG18SW503 urlProvider:network]] map[reflowTime:121.951 source:map[type:text value:[unattributed]]] map[reflowTime:0.468 source:map[column:31 line:1784 type:source-location url:https://www.uam.es/estaticos/UAM-R/js/scripts.min.js?v=13 urlProvider:network]] map[reflowTime:0.282 source:map[column:31 line:1785 type:source-location url:https://www.uam.es/estaticos/UAM-R/js/scripts.min.js?v=13 urlProvider:network]] map[reflowTime:0.242 source:map[column:31 line:1786 type:source-location url:https://www.uam.es/estaticos/UAM-R/js/scripts.min.js?v=13 urlProvider:network]] map[reflowTime:41.655 source:map[column:42 line:1764 type:source-location url:https://www.uam.es/estaticos/UAM-R/js/scripts.min.js?v=13 urlProvider:network]] map[reflowTime:1.04 source:map[column:104 line:2947 type:source-location url:https://www.uam.es/estaticos/UAM-R/js/scripts.min.js?v=13 urlProvider:network]] map[reflowTime:0.465 source:map[column:59 line:1816 type:source-location url:https://www.uam.es/estaticos/UAM-R/js/scripts.min.js?v=13 urlProvider:network]] map[reflowTime:5.059 source:map[column:66 line:1764 type:source-location url:https://www.uam.es/estaticos/UAM-R/js/scripts.min.js?v=13 urlProvider:network]]]

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLProtocol
www.uam.es/uam/iniciohttp/1.1
www.uam.es/estaticos/UAM-R/js/scripts.min.js?v=13http/1.1
www.uam.es/estaticos/UAM-R/js/wcs.js?v=13http/1.1
www.uam.es/estaticos/UAM-R/js/analytics.js?v=13http/1.1
www.uam.es/estaticos/UAM-R/css/uam.min.css?v=13http/1.1
www.uam.es/uam/media/img/1606893064532/marcauam-ahorizontalcolor-imp.svghttp/1.1
www.uam.es/uam/media/img/1606893866850/uam-solo.svghttp/1.1
www.uam.es/uam/media/imgxl/1606852113446/pm2-1920x750.jpghttp/1.1
/uam/media/imgm/1607029033883/la-uam-en-el-top-100mejores...http/1.1
www.uam.es/uam/media/imgs/1607033328935/jpa.jpghttp/1.1
www.uam.es/uam/media/imgs/1607032375722/fifimac.jpghttp/1.1
www.uam.es/uam/media/imgs/1607032400126/voluntariado-web.jpghttp/1.1
www.uam.es/uam/media/imgs/1607031525181/1.-mesa-de-portavoces-ceuam-2026.jpeghttp/1.1
www.uam.es/uam/media/imgm/1607033349710/2026-04-21-gonzalez-beltran-img.jpghttp/1.1
www.uam.es/uam/media/imgs/1607032081544/2026-04-17-barbera-rjb-jpg.jpghttp/1.1
www.uam.es/uam/media/imgs/1607032078382/2026-04-16-arnanz-csic.jpghttp/1.1
/uam/media/imgs/1607032085952/purple-orange-modern-abstra...http/1.1
www.uam.es/uam/media/imgs/1607032075390/2026-04-14-suderov-ifimac-img.jpghttp/1.1
www.uam.es/uam/media/imgm/1606859313941/banner-agenda-2024.jpghttp/1.1
www.uam.es/uam/media/img/1606995215633/portada-23-24.svghttp/1.1
/uam/media/imgm/1606937915229/imagenuamantecrisishumanita...http/1.1
www.uam.es/uam/media/imgm/1606903067572/fotoccd.jpghttp/1.1
www.uam.es/estaticos/UAM-R/videos/video-home.mp4http/1.1
www.uam.es/uam/media/img/1606928370518/infografia-consumo-19-5-23.svghttp/1.1
www.uam.es/uam/media/img/1606848842193/fue-logo-color-01.pnghttp/1.1
www.uam.es/uam/media/img/1606848842439/hr-logo-color-01.pnghttp/1.1
www.uam.es/uam/media/img/1606957595533/parquecientifico.pnghttp/1.1
www.uam.es/uam/media/img/1606848841888/universia-logo-color-01.pnghttp/1.1
www.uam.es/uam/media/img/1606848842005/santander-logo-color-01.pnghttp/1.1
www.uam.es/estaticos/Comun/fonts/uam-icons/uam-icons.woff2?51217462http/1.1
www.uam.es/estaticos/UAM-R/images/favicon.icohttp/1.1

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

URLTransfer SizeDuration
www.uam.es/estaticos/UAM-R/css/uam.min.css?v=13452.8 KiB781 ms
ssl.google-analytics.com/ga.js17.4 KiB248 ms
/css2?family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,7...2.9 KiB
fonts.googleapis.com/css?family=Playfair+Display&display=swap640 B209 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
Imagen promocional de la UAM. / UAM div.col-md-6 > div.uam-media-container > picture > img.uam-media
/uam/media/imgm/1607029033883/la-uam-en-el-top-100mejores...791.6 KiB763.7 KiB
body > div.hero-banner > div.hero-banner-img-wrapper > video#uam-video-background body > div.hero-banner > div.hero-banner-img-wrapper > video#uam-video-background
www.uam.es/uam/media/imgxl/1606852113446/pm2-1920x750.jpg181.7 KiB86.1 KiB
Portal con los podcasts que se crean en la UAM div.news-card-clickable > div.uam-media-container > picture > img.uam-media
/uam/media/imgs/1607032085952/purple-orange-modern-abstra...49.1 KiB42.7 KiB
kroshka__nastya/Freepik div.col-md-6 > div.uam-media-container > picture > img.uam-media
www.uam.es/uam/media/imgm/1607033349710/2026-04-21-gonzalez-beltran-img.jpg51.0 KiB29.6 KiB
Imagen que muestra a una estudiante tomando notas frente a un ordenador div.uam-media-container > a.lightbox > picture > img.uam-media
www.uam.es/uam/media/imgm/1606903067572/fotoccd.jpg39.0 KiB22.7 KiB
Logotipo de la iniciativa UAM ante crisis humanitarias, con texto Donaciones div.uam-media-container > a.lightbox > picture > img.uam-media
/uam/media/imgm/1606937915229/imagenuamantecrisishumanita...37.1 KiB21.6 KiB
Adrián Vayas Gallego, derecha, junto al resto de los miembros de la nueva mesa … div.news-card-clickable > div.uam-media-container > picture > img.uam-media
www.uam.es/uam/media/imgs/1607031525181/1.-mesa-de-portavoces-ceuam-2026.jpeg18.4 KiB9.1 KiB
Imagen de grupo ante el stand de la Oficina de Acción Solidaria de la UAM. div.news-card-clickable > div.uam-media-container > picture > img.uam-media
www.uam.es/uam/media/imgs/1607032400126/voluntariado-web.jpg15.9 KiB6.6 KiB
De izquierda a derecha: Enrique García Michel, Rubén Pérez, la rectora Amaya Me… div.news-card-clickable > div.uam-media-container > picture > img.uam-media
www.uam.es/uam/media/imgs/1607032375722/fifimac.jpg15.6 KiB6.3 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: 725 ms
URLTime Spent
uam.es/725 ms
www.uam.es/uam/inicio0.0 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

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: 230 ms 413.8 KiB
URLTransfer SizeEst Savings
www.uam.es/estaticos/UAM-R/css/uam.min.css?v=13452.5 KiB413.8 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 540.3 KiB
URLTransfer SizeEst Savings
www.uam.es/estaticos/UAM-R/js/scripts.min.js?v=13476.2 KiB319.5 KiB
www.googletagmanager.com/gtm.js?id=GTM-5C3C3B3138.8 KiB70.8 KiB
www.googletagmanager.com/gtag/js?id=G-5TG18SW503176.2 KiB68.0 KiB
www.googletagmanager.com/gtag/js?id=AW-17987922144143.2 KiB57.1 KiB
www.uam.es/estaticos/UAM-R/js/wcs.js?v=1327.3 KiB24.8 KiB

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 169.1 KiB
URLTransfer SizeEst Savings
www.uam.es/estaticos/UAM-R/js/scripts.min.js?v=13476.3 KiB165.0 KiB
www.uam.es/estaticos/UAM-R/js/wcs.js?v=1327.3 KiB4.1 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.uam.es/estaticos/UAM-R/videos/video-home.mp44.2 MiB
/uam/media/imgm/1607029033883/la-uam-en-el-top-100mejores...796.9 KiB
www.uam.es/estaticos/UAM-R/js/scripts.min.js?v=13476.6 KiB
www.uam.es/estaticos/UAM-R/css/uam.min.css?v=13452.8 KiB
www.uam.es/uam/media/img/1606928370518/infografia-consumo-19-5-23.svg405.4 KiB
www.uam.es/uam/media/img/1606995215633/portada-23-24.svg217.5 KiB
www.uam.es/uam/media/imgxl/1606852113446/pm2-1920x750.jpg183.6 KiB
www.googletagmanager.com/gtag/js?id=G-5TG18SW503176.5 KiB
www.googletagmanager.com/gtag/js?id=AW-17987922144143.3 KiB
www.googletagmanager.com/gtm.js?id=GTM-5C3C3B3138.8 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
Universidad Autónoma de Madrid div.container > div.uam-logo > a > img
www.uam.es/uam/media/img/1606893064532/marcauam-ahorizontalcolor-imp.svg
Infografía titulada Des[con]ecta la luz; [con]ecta con el planeta, que incluye … div.uam-media-container > a.lightbox > picture > img.uam-media
www.uam.es/uam/media/img/1606928370518/infografia-consumo-19-5-23.svg
Logotipo de la iniciativa UAM ante crisis humanitarias, con texto Donaciones div.uam-media-container > a.lightbox > picture > img.uam-media
/uam/media/imgm/1606937915229/imagenuamantecrisishumanita...
Logotipo Universia ul.justify-content-center > li.uam-partner-logo > a.out > img
www.uam.es/uam/media/img/1606848841888/universia-logo-color-01.png
Logotipo Santander Universidades ul.justify-content-center > li.uam-partner-logo > a.out > img
www.uam.es/uam/media/img/1606848842005/santander-logo-color-01.png
Logotipo HRS4R ul.justify-content-center > li.uam-partner-logo > a > img
www.uam.es/uam/media/img/1606848842439/hr-logo-color-01.png
Logotipo Fundación Universidad Empresa ul.justify-content-center > li.uam-partner-logo > a.out > img
www.uam.es/uam/media/img/1606848842193/fue-logo-color-01.png
Imagen promocional de la UAM. / UAM div.col-md-6 > div.uam-media-container > picture > img.uam-media
/uam/media/imgm/1607029033883/la-uam-en-el-top-100mejores...
kroshka__nastya/Freepik div.col-md-6 > div.uam-media-container > picture > img.uam-media
www.uam.es/uam/media/imgm/1607033349710/2026-04-21-gonzalez-beltran-img.jpg
Portada del anuario La UAM EN CIFRAS 2025 div.uam-media-container > a.lightbox > picture > img.uam-media
www.uam.es/uam/media/img/1606995215633/portada-23-24.svg
Imagen que muestra a una estudiante tomando notas frente a un ordenador div.uam-media-container > a.lightbox > picture > img.uam-media
www.uam.es/uam/media/imgm/1606903067572/fotoccd.jpg
Banner para anunciar la agenda semanal div.uam-media-container > a.lightbox > picture > img.uam-media
www.uam.es/uam/media/imgm/1606859313941/banner-agenda-2024.jpg
Logotipo Parque Científico Madrid ul.justify-content-center > li.uam-partner-logo > a.out > img
www.uam.es/uam/media/img/1606957595533/parquecientifico.png

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

●Max Potential First Input Delay 80 ms
●Layout shift culprits
●Optimize DOM size
●LCP breakdown
●Optimize viewport for mobile
●Minify CSS
●User Timing marks and measures 10 user timings
●JavaScript execution time 0.4 s
●Minimizes main-thread work 1.2 s
●Avoid long main-thread tasks 3 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 170 ms
●Server Backend Latencies 40 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 180 ms
●Avoid large layout shifts 15 layout shifts found
○INP breakdown
○LCP request discovery
88

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
La UAM div.uam-footer-menu > ul#uam-footer-accordion > li.accordion-item > div.accordion-header
Vida universitaria div.uam-footer-menu > ul#uam-footer-accordion > li.accordion-item > div.accordion-header
Información para... div.uam-footer-menu > ul#uam-footer-accordion > li.accordion-item > div.accordion-header

Focusable descendents within an `[aria-hidden="true"]` element prevent those interactive elements from being available to users of assistive technologies like screen readers. Learn how `aria-hidden` affects focusable elements.

Why this matters

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

Source: MDN Permissions-Policy

Failing Elements
Actualidad La UAM celebra su Día de Puertas Abiertas 2026 La UAM celebra su D… div.uam-news > div.container > div.row > div.news-card
Actualidad La UAM constituye la Fundación Centro de Investigación Física de la… div.uam-news > div.container > div.row > div.news-card
Actualidad La UAM celebra su I Feria del Voluntariado y anima a imaginar que “… div.uam-news > div.container > div.row > div.news-card
Actualidad Adrián Vayas Gallego, nuevo portavoz del Consejo de Estudiantes de … div.uam-news > div.container > div.row > div.news-card
Investigación Descubren Ewangoa, un nuevo género de plantas nativo de África C… div.uam-news > div.container > div.row > div.news-card
Investigación El 22% de las lagunas temporales de la Península Ibérica ha desa… div.uam-news > div.container > div.row > div.news-card
Actividades culturales Nuevo portal de podcasts divulgativos de la UAM Nuevo … div.uam-news > div.container > div.row > div.news-card
Investigación Revelan cómo mínimas impurezas magnéticas alteran la superconduc… div.uam-news > div.container > div.row > div.news-card
Comunicado 06/03/2026 Manifiesto de CRUE con motivo del Día Internacional de … div.uam-releases > div.container > div.row > div.col-lg-3
Comunicado 03/03/2026 Valoración de CRUMA del Acuerdo de Financiación Plurian… div.uam-releases > div.container > div.row > div.col-lg-3
Comunicado de la CRUE 15/01/2026 CRUE expresa su firme condena ante la interv… div.uam-releases > div.container > div.row > div.col-lg-3
Comunicado de la CRUE 27/05/2025 Por el cese de la violencia en Gaza y el res… div.uam-releases > div.container > div.row > div.col-lg-3

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.

Navigation

A value greater than 0 implies an explicit navigation ordering. Although technically valid, this often creates frustrating experiences for users who rely on assistive technologies. Learn more about the `tabindex` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
nuestra política de cookies. div.cookies-wrapper > div.cookies-text > p > a.cookies-link
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These are opportunities to improve keyboard navigation in your application.

○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
●Image elements have `[alt]` attributes
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●`[accesskey]` values are unique
●ARIA attributes are used as specified for the element's role
●Elements use only permitted ARIA attributes
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<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
●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
●`<video>` elements contain a `<track>` element with `[kind="captions"]`
○`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
○Form elements have associated labels
○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
○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.
100

Best Practices

●Uses HTTPS
●Avoids deprecated APIs
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No browser errors logged to the console
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
100

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.

○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 have descriptive text
●Links are crawlable
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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