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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.

72

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
staweb.unizar.es/matomo.js3600.0 s66.3 KiB
cdn.jsdelivr.net/npm/swiper@11/swiper-bundle.min.js604800.0 s43.4 KiB
static.addtoany.com/menu/page.js86400.0 s2.2 KiB
cdn.jsdelivr.net/npm/swiper@11/swiper-bundle.min.css604800.0 s5.1 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.14173299999999997] map[node:map[boundingRect:map[bottom:646 height:168 left:329 right:1315 top:478 width:986] lhId:page-28-DIV nodeLabel:Next path:1,HTML,1,BODY,2,DIV,1,DIV,0,DIV,1,DIV selector:div.dialog-off-canvas-main-canvas > div.inner-ribbon > div.region > div#block-unizar-unizar-views-block-banners-block-1 snippet:<div class="views-element-container banners block block-views-blockbanners-block-1" id="block-unizar-unizar-views-block-banners-block-1"> type:node] score:0.109779] map[node:map[boundingRect:map[bottom:646 height:168 left:329 right:1315 top:478 width:986] lhId:page-28-DIV nodeLabel:Next path:1,HTML,1,BODY,2,DIV,1,DIV,0,DIV,1,DIV selector:div.dialog-off-canvas-main-canvas > div.inner-ribbon > div.region > div#block-unizar-unizar-views-block-banners-block-1 snippet:<div class="views-element-container banners block block-views-blockbanners-block-1" id="block-unizar-unizar-views-block-banners-block-1"> type:node] score:0.029118] map[node:map[boundingRect:map[bottom:744 height:36 left:35 right:1315 top:708 width:1280] lhId:page-24-H2 nodeLabel:Oferta académica path:1,HTML,1,BODY,2,DIV,2,MAIN,0,DIV,0,DIV,0,DIV,0,DIV,2,SECTION,0,DIV,0,DIV,0,DIV,0,H2 selector:div.block-inn > div.block-title-and-content > div.block-title > h2 snippet:<h2> type:node] score:0.000242 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:94 height:50 left:35 right:213 top:44 width:178] lhId:page-3-IMG nodeLabel:Universidad de Zaragoza path:1,HTML,1,BODY,2,DIV,0,HEADER,1,DIV,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,A,0,IMG selector:div.logo-cabecera > div > a > img snippet:<img src="/sites/www/files/logo_uz_1474_0.png" alt="Universidad de Zaragoza"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:940 height:113 left:0 right:1350 top:827 width:1350] lhId:page-30-DIV nodeLabel:Utilizamos cookies en este sitio web para mejorar su experiencia de usuario. A… path:1,HTML,1,BODY,92,DIV selector:body.path-229 > div#sliding-popup snippet:<div id="sliding-popup" role="alertdialog" aria-describedby="popup-text" aria-label="Cookie compliance banner" class="sliding-popup-bottom" style="height: auto; width: 100%; bottom: 0px;"> type:node] score:0.000213] map[node:map[boundingRect:map[bottom:940 height:113 left:0 right:1350 top:827 width:1350] lhId:page-30-DIV nodeLabel:Utilizamos cookies en este sitio web para mejorar su experiencia de usuario. A… path:1,HTML,1,BODY,92,DIV selector:body.path-229 > div#sliding-popup snippet:<div id="sliding-popup" role="alertdialog" aria-describedby="popup-text" aria-label="Cookie compliance banner" class="sliding-popup-bottom" style="height: auto; width: 100%; bottom: 0px;"> type:node] score:0.000201]]

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.unizar.es/themes/custom/unizar_base_10/css/fonts/icomoon.woff?405jqy40 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:28.318 source:map[column:22 line:19 type:source-location url:https://www.unizar.es/core/misc/drupal.init.js?v=10.6.5 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:76.601 source:map[type:text value:[unattributed]]] map[reflowTime:0.902 source:map[column:84992 line:1 type:source-location url:https://www.unizar.es/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 urlProvider:network]] map[reflowTime:0.283 source:map[column:50335 line:1 type:source-location url:https://www.unizar.es/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 urlProvider:network]] map[reflowTime:0.178 source:map[column:50393 line:1 type:source-location url:https://www.unizar.es/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 urlProvider:network]] map[reflowTime:0.231 source:map[column:50457 line:1 type:source-location url:https://www.unizar.es/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 urlProvider:network]] map[reflowTime:14.753 source:map[column:49615 line:1 type:source-location url:https://www.unizar.es/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 urlProvider:network]] map[reflowTime:0.119 source:map[column:54434 line:1 type:source-location url:https://www.unizar.es/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 urlProvider:network]] map[reflowTime:1.596 source:map[column:49637 line:1 type:source-location url:https://www.unizar.es/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 urlProvider:network]] map[reflowTime:0.428 source:map[column:51395 line:1 type:source-location url:https://www.unizar.es/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 urlProvider:network]] map[reflowTime:0.107 source:map[column:52410 line:1 type:source-location url:https://www.unizar.es/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 urlProvider:network]] map[reflowTime:9.647 source:map[column:7882 line:0 type:source-location url:https://www.unizar.es/modules/contrib/tb_megamenu/dist/js/frontend.js?v=1.x urlProvider:network]] map[reflowTime:0.074 source:map[column:83946 line:1 type:source-location url:https://www.unizar.es/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 urlProvider:network]] map[reflowTime:0.594 source:map[column:243 line:0 type:source-location url:https://www.unizar.es/modules/contrib/blazy/js/plugin/blazy.viewport.min.js?tdwaij urlProvider:network]]]

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
Proyecto TRAME ul.news > li.new-item > a > img.image-style-imag-noticia-vista
/sites/www/files/styles/imag_noticia_vista/public/imagene...301.6 KiB293.0 KiB
Sala de estudio div.views-field > div.field-content > div.media > img.media__element
/sites/www/files/styles/imagen_cabecera_www/public/2024-1...191.8 KiB81.8 KiB
Banner Universidad de Verano de Teruel div.views-field > div.field-content > a > img.image-style-imagen-banner
/sites/www/files/styles/imagen_banner/public/imagenes-ban...55.5 KiB49.8 KiB
Universidad de Zaragoza div.logo-cabecera > div > a > img
www.unizar.es/sites/www/files/logo_uz_1474_0.png46.4 KiB45.8 KiB
Banner Segunda campaña de encuestas 25_26 div.views-field > div.field-content > a > img.image-style-imagen-banner
/sites/www/files/styles/imagen_banner/public/imagenes-ban...48.6 KiB42.9 KiB
La Facultad de Empresa y Gestión Pública acoge la ceremonia ul.news > li.new-item > a > img.image-style-imag-noticia-vista
/sites/www/files/styles/imag_noticia_vista/public/imagene...48.7 KiB40.2 KiB
Expotalent 2026 ul.news > li.new-item > a > img.image-style-imag-noticia-vista
/sites/www/files/styles/imag_noticia_vista/public/imagene...38.7 KiB30.1 KiB
Luis Antonio Sáez y Gemma Larramona ul.news > li.new-item > a > img.image-style-imag-noticia-vista
/sites/www/files/styles/imag_noticia_vista/public/imagene...35.6 KiB27.0 KiB
Lucía Gutiérrez y Jesús Santamaría, en la entrega de premios ul.news > li.new-item > a > img.image-style-imag-noticia-vista
/sites/www/files/styles/imag_noticia_vista/public/imagene...30.7 KiB22.5 KiB
rebaño de ovejas ul.news > li.new-item > a > img.image-style-imag-noticia-vista
/sites/www/files/styles/imag_noticia_vista/public/imagene...29.3 KiB21.5 KiB
div.block-content > div.clearfix > div.rrss_imag > img div.block-content > div.clearfix > div.rrss_imag > img
/sites/www/files/imagenes/home/rrss/c23c8fad-16c7-4ab3-bd...104.9 KiB19.3 KiB
El Campus de Huesca hace entrega de los fondos recaudados a la AECC ul.news > li.new-item > a > img.image-style-imag-noticia-vista
/sites/www/files/styles/imag_noticia_vista/public/imagene...26.0 KiB19.1 KiB
Logo UNITA ul.alter1 > li > a > img
www.unizar.es/sites/www/files/archivos/home/logos-sup/unita.png16.6 KiB16.2 KiB
Icono másteres li > h3.epigrafe-estudio > a > img
www.unizar.es/sites/www/files/archivos/home/estudios/books.png13.7 KiB13.6 KiB
Obras de la exposición Roma y París horizonte de los artistas aragoneses 1870 1… ul.news > li.new-item > a > img.image-style-imag-noticia-vista
/sites/www/files/styles/imag_noticia_vista/public/imagene...17.9 KiB13.2 KiB
Icono grados li > h3.epigrafe-estudio > a > img
www.unizar.es/sites/www/files/archivos/home/estudios/graduacion.png13.1 KiB13.1 KiB
Logo Estrategia de Recursos Humanos para Investigadores ul.alter1 > li > a > img
www.unizar.es/sites/www/files/archivos/home/logos-sup/hr-excellence2.png12.7 KiB12.2 KiB
Icono formación continua li > h3.epigrafe-estudio > a > img
www.unizar.es/sites/www/files/archivos/home/estudios/arrows-repeat-1.png9.5 KiB9.5 KiB
div.clearfix > div.item_campus > div.campus_image > img div.clearfix > div.item_campus > div.campus_image > img
www.unizar.es/sites/www/files/archivos/home/campus/hueca.jpg15.0 KiB7.8 KiB
Icono doctorado li > h3.epigrafe-estudio > a > img
www.unizar.es/sites/www/files/archivos/home/estudios/book-open-cover.png7.7 KiB7.6 KiB
Cofinanciado programa Erasmus + de la Unión Europea ul.alter1 > li > a > img
www.unizar.es/sites/www/files/archivos/home/logos-footer/erasmus%2B.png8.3 KiB7.3 KiB
Logo CRUE ul.alter1 > li > a > img
www.unizar.es/sites/www/files/archivos/home/logos-footer/crue.png6.5 KiB5.9 KiB
div.clearfix > div.item_campus > div.campus_image > img div.clearfix > div.item_campus > div.campus_image > img
www.unizar.es/sites/www/files/archivos/home/campus/fachada_cmu002.jpg12.3 KiB5.4 KiB
Logo Grupo 9 universidades ul.alter1 > li > a > img
www.unizar.es/sites/www/files/archivos/home/logos-footer/g9.png5.3 KiB5.0 KiB

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-1-IMG
nodeLabel: Sala de estudio
path: 1,HTML,1,BODY,2,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,IMG
selector: div.views-field > div.field-content > div.media > img.media__element
snippet: <img alt="Sala de estudio" decoding="async" class="media__element b-lazy b-loaded" loading="eager" src="/sites/www/files/styles/imagen_cabecera_www/public/2024-10/p1120259revmg%2…" width="1900" height="800">

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
/css2?family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,7...2.7 KiB
/css2?family=Red+Hat+Text:ital,wght@0,300..700;1,300..700...2.8 KiB
fonts.googleapis.com/css2?family=Karla:wght@200;300;400;600;700;800&display=swap533 B
fonts.googleapis.com/css2?family=Varela+Round&display=swap625 B
/css2?family=Red+Hat+Text:ital,wght@0,300..700;1,300..700...530 B80 ms
fonts.googleapis.com/css2?family=Lato:wght@300;400;700;900&display=swap568 B
/css2?family=Red+Hat+Text:ital,wght@0,100;0,200;0,300;0,4...933 B349 ms
www.unizar.es/themes/custom/unizar_base_10/css/default.css?tdwaij64.9 KiB160 ms
www.unizar.es/themes/custom/unizar_base_10/css/ckeditor.css?tdwaij5.0 KiB
www.unizar.es/themes/custom/unizar_unizar/css/custom.css?tdwaij1.2 KiB
www.unizar.es/themes/custom/unizar_base_10/css/componentes/tablas.css?tdwaij12.1 KiB
/sites/www/files/asset_injector/css/www_inyeccion_css-530...8.5 KiB
/sites/www/files/asset_injector/css/menu_cheeseburguer-ec...3.3 KiB
/sites/www/files/asset_injector/css/novedades-cfab8c74796...3.0 KiB
www.unizar.es/themes/custom/unizar_base_10/css/componentes/botones.css?tdwaij8.9 KiB
/sites/www/files/asset_injector/css/hero-6f85f76a901a8ce6...2.5 KiB
www.unizar.es/core/themes/starterkit_theme/css/components/dialog.css?tdwaij1.9 KiB
www.unizar.es/themes/custom/unizar_base_10/css/print.css?tdwaij711 B
www.unizar.es/themes/custom/unizar_base_10/css/formulario.css?tdwaij9.0 KiB
www.unizar.es/themes/custom/unizar_unizar/css/www.css?tdwaij37.9 KiB
www.unizar.es/themes/custom/unizar_base_10/css/tarjetas.css?tdwaij22.8 KiB
/sites/www/files/asset_injector/css/noticias_home-40c96e0...8.8 KiB
www.unizar.es/themes/custom/unizar_base_10/css/normalize.css?tdwaij7.8 KiB
/sites/www/files/asset_injector/css/fade_home-afd0f531578...1.8 KiB
www.unizar.es/themes/custom/unizar_base_10/css/componentes/mensajes.css?tdwaij3.2 KiB
www.unizar.es/themes/custom/unizar_base_10/css/fonts.css?tdwaij2.3 KiB
www.unizar.es/themes/custom/unizar_base_10/css/globals.css?tdwaij1.8 KiB
www.unizar.es/core/themes/starterkit_theme/css/components/tabs.css?tdwaij843 B
www.unizar.es/core/themes/starterkit_theme/css/components/progress.css?tdwaij1.7 KiB
www.unizar.es/core/themes/starterkit_theme/css/components/button.css?tdwaij576 B
www.unizar.es/core/themes/starterkit_theme/css/components/messages.css?tdwaij2.1 KiB
www.unizar.es/core/themes/starterkit_theme/css/components/item-list.css?tdwaij919 B
www.unizar.es/core/themes/starterkit_theme/css/components/breadcrumb.css?tdwaij866 B
www.unizar.es/core/themes/starterkit_theme/css/components/menu.css?tdwaij1.0 KiB
www.unizar.es/core/themes/starterkit_theme/css/components/field.css?tdwaij899 B
www.unizar.es/core/themes/starterkit_theme/css/components/details.css?tdwaij691 B
www.unizar.es/core/themes/starterkit_theme/css/components/tableselect.css?tdwaij675 B
www.unizar.es/core/themes/starterkit_theme/css/components/tabledrag.css?tdwaij574 B
www.unizar.es/core/themes/starterkit_theme/css/components/tablesort.css?tdwaij498 B
www.unizar.es/core/themes/starterkit_theme/css/components/more-link.css?tdwaij543 B
/core/themes/starterkit_theme/css/components/exposed-filt...1.2 KiB
/core/themes/starterkit_theme/css/components/container-in...854 B
www.unizar.es/core/themes/starterkit_theme/css/components/pager.css?tdwaij575 B
/themes/custom/unizar_base_10/css/unizar_tipos_contenidos...41.5 KiB80 ms
www.unizar.es/core/themes/starterkit_theme/css/components/ui-dialog.css?tdwaij571 B
www.unizar.es/core/misc/drupalSettingsLoader.js?v=10.6.51.1 KiB
/core/themes/stable9/css/core/assets/vendor/normalize-css...6.4 KiB
www.unizar.es/core/themes/starterkit_theme/css/components/icons.css?tdwaij798 B
www.unizar.es/modules/contrib/google_tag/js/gtag.js?tdwaij1.7 KiB
/modules/custom/unizar_tipos_contenidos_basicos/css/bloqu...633 B
www.unizar.es/core/themes/starterkit_theme/css/components/links.css?tdwaij716 B
www.unizar.es/core/themes/starterkit_theme/css/components/textarea.css?tdwaij541 B
www.unizar.es/themes/custom/unizar_base_10/css/componentes/acordeon.css?tdwaij4.4 KiB
www.unizar.es/core/themes/starterkit_theme/css/components/link.css?tdwaij589 B
www.unizar.es/core/themes/starterkit_theme/css/components/inline-form.css?tdwaij1.1 KiB
www.unizar.es/core/themes/starterkit_theme/css/components/form.css?tdwaij2.5 KiB
/core/themes/starterkit_theme/css/components/action-links...1.2 KiB
www.unizar.es/core/themes/stable9/css/core/components/progress.module.css?tdwaij1.2 KiB
/core/themes/stable9/css/system/components/position-conta...466 B
/modules/contrib/eu_cookie_compliance/css/eu_cookie_compl...6.6 KiB
www.unizar.es/core/assets/vendor/jquery.ui/themes/base/theme.css?tdwaij17.7 KiB
/core/themes/stable9/css/system/components/item-list.modu...660 B
www.unizar.es/core/themes/stable9/css/system/components/align.module.css?tdwaij857 B
www.unizar.es/core/modules/ckeditor5/css/ckeditor5.dialog.fix.css?tdwaij427 B
www.unizar.es/modules/contrib/addtoany/css/addtoany.css?tdwaij1.3 KiB
www.unizar.es/core/themes/stable9/css/system/components/nowrap.module.css?tdwaij467 B
www.unizar.es/modules/contrib/cheeseburger_menu/css/cheeseburger_menu.css?tdwaij7.0 KiB
www.unizar.es/core/themes/stable9/css/system/components/resize.module.css?tdwaij643 B
/core/themes/stable9/css/system/components/system-status-...930 B
www.unizar.es/modules/contrib/back_to_top/css/back_to_top.css?tdwaij902 B
/modules/contrib/ckeditor5_plugin_pack/modules/ckeditor5_...1.6 KiB
www.unizar.es/core/themes/stable9/css/system/components/js.module.css?tdwaij775 B
www.unizar.es/modules/contrib/tb_megamenu/dist/base.css?tdwaij7.8 KiB
/core/themes/stable9/css/system/components/system-status-...1.1 KiB
/core/themes/stable9/css/system/components/details.module...499 B
www.unizar.es/modules/custom/unizar_shortcode/css/accordion.css?tdwaij5.3 KiB
www.unizar.es/modules/contrib/tb_megamenu/dist/styles.css?tdwaij2.8 KiB
/core/themes/stable9/css/system/components/tablesort.modu...744 B
www.unizar.es/modules/contrib/blazy/css/components/blazy.loading.css?tdwaij1.8 KiB
www.unizar.es/core/assets/vendor/jquery.ui/themes/base/dialog.css?tdwaij2.1 KiB
/core/themes/stable9/css/system/components/container-inli...600 B
/core/themes/stable9/css/core/components/ajax-progress.mo...1.4 KiB
www.unizar.es/core/themes/stable9/css/views/views.module.css?tdwaij807 B
www.unizar.es/modules/contrib/blazy/css/blazy.css?tdwaij4.2 KiB
/core/themes/stable9/css/system/components/clearfix.modul...680 B
/core/themes/stable9/css/system/components/system-status-...627 B
/core/themes/stable9/css/system/components/reset-appearan...621 B
www.unizar.es/core/themes/stable9/css/system/components/hidden.module.css?tdwaij1.7 KiB
/core/themes/stable9/css/system/components/fieldgroup.mod...466 B
cdn.jsdelivr.net/bxslider/4.2.12/jquery.bxslider.css1.2 KiB204 ms
cdn.jsdelivr.net/npm/swiper@11/swiper-bundle.min.css5.1 KiB
www.unizar.es/core/assets/vendor/jquery.ui/themes/base/button.css?tdwaij1.7 KiB
www.unizar.es/core/assets/vendor/jquery.ui/themes/base/checkboxradio.css?tdwaij1.1 KiB
www.unizar.es/core/assets/vendor/jquery.ui/themes/base/controlgroup.css?tdwaij1.8 KiB
www.unizar.es/core/assets/vendor/jquery.ui/themes/base/core.css?tdwaij1.9 KiB
www.unizar.es/core/assets/vendor/jquery.ui/themes/base/resizable.css?tdwaij1.5 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: 223 ms
URLTime Spent
unizar.es/223 ms
www.unizar.es/0.0 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

ElementLayout shift score
Next div.dialog-off-canvas-main-canvas > div.inner-ribbon > div.region > div#block-unizar-unizar-views-block-banners-block-1
0.110
Next div.dialog-off-canvas-main-canvas > div.inner-ribbon > div.region > div#block-unizar-unizar-views-block-banners-block-1
0.029
Oferta académica div.block-inn > div.block-title-and-content > div.block-title > h2
0.000
Utilizamos cookies en este sitio web para mejorar su experiencia de usuario. A… body.path-229 > div#sliding-popup
0.000
Utilizamos cookies en este sitio web para mejorar su experiencia de usuario. A… body.path-229 > div#sliding-popup
0.000
Utilizamos cookies en este sitio web para mejorar su experiencia de usuario. A… body.path-229 > div#sliding-popup
0.000
Utilizamos cookies en este sitio web para mejorar su experiencia de usuario. A… body.path-229 > div#sliding-popup
0.000
Utilizamos cookies en este sitio web para mejorar su experiencia de usuario. A… body.path-229 > div#sliding-popup
0.000
Utilizamos cookies en este sitio web para mejorar su experiencia de usuario. A… body.path-229 > div#sliding-popup
0.000
Utilizamos cookies en este sitio web para mejorar su experiencia de usuario. A… body.path-229 > div#sliding-popup
0.000
Utilizamos cookies en este sitio web para mejorar su experiencia de usuario. A… body.path-229 > div#sliding-popup
0.000
Utilizamos cookies en este sitio web para mejorar su experiencia de usuario. A… body.path-229 > div#sliding-popup
0.000
Utilizamos cookies en este sitio web para mejorar su experiencia de usuario. A… body.path-229 > div#sliding-popup
0.000
Utilizamos cookies en este sitio web para mejorar su experiencia de usuario. A… body.path-229 > div#sliding-popup
0.000
Utilizamos cookies en este sitio web para mejorar su experiencia de usuario. A… body.path-229 > div#sliding-popup
0.000

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

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 30 ms 56.7 KiB
URLTransfer SizeEst Savings
www.unizar.es/themes/custom/unizar_base_10/css/default.css?tdwaij64.9 KiB14.7 KiB
/themes/custom/unizar_base_10/css/unizar_tipos_contenidos...41.5 KiB9.9 KiB
www.unizar.es/themes/custom/unizar_base_10/css/normalize.css?tdwaij7.8 KiB5.8 KiB
/sites/www/files/asset_injector/css/noticias_home-40c96e0...8.8 KiB5.0 KiB
/core/themes/stable9/css/core/assets/vendor/normalize-css...6.4 KiB4.4 KiB
www.unizar.es/core/assets/vendor/jquery.ui/themes/base/theme.css?tdwaij17.7 KiB3.8 KiB
www.unizar.es/themes/custom/unizar_base_10/css/componentes/tablas.css?tdwaij12.1 KiB3.6 KiB
/sites/www/files/asset_injector/css/www_inyeccion_css-530...8.5 KiB2.7 KiB
www.unizar.es/modules/contrib/blazy/css/blazy.css?tdwaij4.2 KiB2.4 KiB
www.unizar.es/themes/custom/unizar_base_10/css/formulario.css?tdwaij9.0 KiB2.2 KiB
www.unizar.es/themes/custom/unizar_base_10/css/componentes/botones.css?tdwaij8.9 KiB2.2 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: 80 ms 115.0 KiB
URLTransfer SizeEst Savings
www.unizar.es/core/misc/ajax.js?v=10.6.565.0 KiB45.6 KiB
www.unizar.es/core/misc/drupal.js?v=10.6.520.6 KiB16.2 KiB
www.unizar.es/core/misc/position.js?v=10.6.522.0 KiB11.9 KiB
www.unizar.es/core/misc/dialog/dialog.ajax.js?v=10.6.510.1 KiB6.0 KiB
www.unizar.es/core/misc/displace.js?v=10.6.57.9 KiB5.7 KiB
www.unizar.es/core/misc/message.js?v=10.6.58.2 KiB5.5 KiB
www.unizar.es/libraries/jquery.hover-intent/jquery.hoverIntent.js?v=1.10.27.1 KiB4.6 KiB
www.unizar.es/themes/custom/unizar_base_10/js/base.js?v=1.x7.8 KiB3.4 KiB
/sites/www/files/asset_injector/js/menu-5b5f884d230f40bd3...10.8 KiB3.4 KiB
www.unizar.es/core/misc/progress.js?v=10.6.55.1 KiB3.3 KiB
www.unizar.es/core/misc/announce.js?v=10.6.54.2 KiB3.2 KiB
www.unizar.es/core/misc/dialog/dialog.js?v=10.6.53.4 KiB2.1 KiB
www.unizar.es/modules/custom/unizar_shortcode/js/accordion.js?v=1.x3.9 KiB2.0 KiB
www.unizar.es/core/misc/dialog/dialog.position.js?v=10.6.54.2 KiB2.0 KiB

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: 110 ms 159.2 KiB
URLTransfer SizeEst Savings
www.unizar.es/themes/custom/unizar_base_10/css/default.css?tdwaij64.5 KiB49.1 KiB
/themes/custom/unizar_base_10/css/unizar_tipos_contenidos...41.1 KiB38.3 KiB
www.unizar.es/themes/custom/unizar_base_10/css/tarjetas.css?tdwaij22.4 KiB22.4 KiB
www.unizar.es/themes/custom/unizar_unizar/css/www.css?tdwaij37.5 KiB20.9 KiB
www.unizar.es/core/assets/vendor/jquery.ui/themes/base/theme.css?tdwaij17.3 KiB16.8 KiB
www.unizar.es/themes/custom/unizar_base_10/css/componentes/tablas.css?tdwaij11.7 KiB11.7 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: 200 ms 283.1 KiB
URLTransfer SizeEst Savings
www.googletagmanager.com/gtag/js?id=G-D7CJD782L0157.6 KiB64.2 KiB
code.jquery.com/ui/1.14.0/jquery-ui.min.js65.2 KiB56.6 KiB
cdn.jsdelivr.net/npm/swiper@11/swiper-bundle.min.js43.0 KiB41.9 KiB
www.unizar.es/core/misc/ajax.js?v=10.6.565.0 KiB40.3 KiB
staweb.unizar.es/matomo.js65.9 KiB36.5 KiB
www.unizar.es/core/assets/vendor/jquery/jquery.min.js?v=3.7.185.5 KiB23.1 KiB
/modules/contrib/eu_cookie_compliance/js/eu_cookie_compli...33.0 KiB20.5 KiB

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
/sites/www/files/styles/imag_noticia_vista/public/imagene...302.2 KiB
/sites/www/files/styles/imagen_cabecera_www/public/2024-1...192.3 KiB
www.googletagmanager.com/gtag/js?id=G-D7CJD782L0158.0 KiB
/sites/www/files/imagenes/home/rrss/c23c8fad-16c7-4ab3-bd...105.3 KiB
www.unizar.es/core/assets/vendor/jquery/jquery.min.js?v=3.7.186.0 KiB
staweb.unizar.es/matomo.js66.3 KiB
code.jquery.com/ui/1.14.0/jquery-ui.min.js65.5 KiB
www.unizar.es/core/misc/ajax.js?v=10.6.565.4 KiB
www.unizar.es/themes/custom/unizar_base_10/css/default.css?tdwaij64.9 KiB
/sites/www/files/styles/imagen_banner/public/imagenes-ban...55.9 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 de Zaragoza div.logo-cabecera > div > a > img
www.unizar.es/sites/www/files/logo_uz_1474_0.png
es div.gt_float_switcher > div.gt-selected > div.gt-current-lang > img
cdn.gtranslate.net/flags/svg/es.svg
Logo universidad div.footer-inner > div.logo_unizar_es > a > img
www.unizar.es/themes/custom/unizar_unizar/img/unizar_es.svg

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

●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Max Potential First Input Delay 40 ms
●User Timing marks and measures 5 user timings
●JavaScript execution time 0.2 s
●Minimizes main-thread work 1.0 s
●Avoid long main-thread tasks 1 long task found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 40 ms
●Server Backend Latencies 90 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 250 ms
○INP breakdown
○Avoid non-composited animations
83

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
Perfiles ul.tbm-nav > li.tbm-item > div.tbm-link-container > span.tbm-link
UNIZAR ul.tbm-nav > li.tbm-item > div.tbm-link-container > span.tbm-link
Estudios ul.tbm-nav > li.tbm-item > div.tbm-link-container > span.tbm-link
I+D+i ul.tbm-nav > li.tbm-item > div.tbm-link-container > span.tbm-link
Vida Universitaria ul.tbm-nav > li.tbm-item > div.tbm-link-container > span.tbm-link

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
Banner Exposición "Roma y París, horizonte de los artistas aragoneses (1870-192… div.view-content > div.slick-list > div.slick-track > div.views-row

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.

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
(Buscador de grados, másteres y doctorado) div.block-content > div.buscador-estudios > div.ui-widget > p
21/04/2026 li.new-item > div.texto-noticia > div.fecha-noticia > time.datetime
21/04/2026 li.new-item > div.texto-noticia > div.fecha-noticia > time.datetime
21/04/2026 li.new-item > div.texto-noticia > div.fecha-noticia > time.datetime
21/04/2026 li.new-item > div.texto-noticia > div.fecha-noticia > time.datetime
21/04/2026 li.new-item > div.texto-noticia > div.fecha-noticia > time.datetime
20/04/2026 li.new-item > div.texto-noticia > div.fecha-noticia > time.datetime
17/04/2026 li.new-item > div.texto-noticia > div.fecha-noticia > time.datetime
16/04/2026 li.new-item > div.texto-noticia > div.fecha-noticia > time.datetime
Ver más div.layout-1 > div.view-footer > p.ver-mas > a.ver-mas_news
Ir a la web div.item_campus > div.campus_content > p > a.campus_btn
Ir a la web div.item_campus > div.campus_content > p > a.campus_btn

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.block-content > div.clearfix > div.rrss_imag > img div.block-content > div.clearfix > div.rrss_imag > img
ul.alter1 > li > a > img ul.alter1 > li > a > img

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.

○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
●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
●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
●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 have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Image elements do not have `[alt]` attributes that are redundant text.
●Identical links have the same purpose.
●Elements with visible text labels have matching accessible names.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements 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
○Links are distinguishable without relying on color.
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○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
○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
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

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.

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.block-content > div.clearfix > div.rrss_imag > img div.block-content > div.clearfix > div.rrss_imag > img
ul.alter1 > li > a > img ul.alter1 > li > a > 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 have descriptive text
●Links are crawlable
●robots.txt is valid
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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