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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.

95

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
/wp-content/themes/wp-unibi-theme-2021-1/img/default-img/...0.0 ms321.5 KiB
www.uni-bielefeld.de/_internal/cimg!0/fxp2afeht1wtanobfmgsht2jpp4tmed.jpeg0.0 ms252.8 KiB
www.uni-bielefeld.de/_internal/cimg!0/pvl4lv1ofjr0i3oq7h52siim9r05fbl.jpeg0.0 ms140.9 KiB
www.uni-bielefeld.de/_internal/cimg!0/n94djbeo8bvnlz5h7ow3r4nnhgk04m8.jpeg0.0 ms140.3 KiB
www.uni-bielefeld.de/(cache-forever,mtime=1776692512)/assets/js/app.js0.0 ms91.8 KiB
aktuell.uni-bielefeld.de/wp-content/uploads/2026/04/DSC01301-400x400.jpg0.0 ms82.9 KiB
www.uni-bielefeld.de/(cache-forever,mtime=1776688696)/assets/js/libs.js0.0 ms55.8 KiB
/wp-content/uploads/2026/04/ZiF-GRP-Postcolonial-and-Post...0.0 ms47.3 KiB
/(cache-forever,mtime=1776688716)/assets/fonts/Lelo-Bold....0.0 ms36.9 KiB
/(cache-forever,mtime=1776688679)/assets/fonts/Lelo-Regul...0.0 ms34.8 KiB
/(cache-forever,mtime=1776688722)/assets/css/non-critical...0.0 ms26.6 KiB
www.uni-bielefeld.de/(cache-forever,mtime=1776688716)/assets/css/critical.css0.0 ms22.4 KiB
www.uni-bielefeld.de/_internal/cimg!0/7ylkxr7j2xdl0kj24omr4ymf6ay2ggg.png0.0 ms19.9 KiB
www.uni-bielefeld.de/(cache-forever,mtime=1776688706)/assets/css/print.css0.0 ms12.9 KiB
www.uni-bielefeld.de/_internal/cimg!0/j6e833r20btb4jr4r4jduzgjcr6r49l.png0.0 ms12.1 KiB
www.uni-bielefeld.de/_internal/cimg!0/6cd7vm8st92aoqehbr209twoga6jnu0.png0.0 ms9.4 KiB
www.uni-bielefeld.de/_internal/cimg!0/hv477gpo20wa9hse4rhlcaj5ugutwh5.png0.0 ms7.5 KiB
www.uni-bielefeld.de/_internal/cimg!0/g9j2mevv0gdzla0w5qkin59eoraiu2o.png0.0 ms6.4 KiB
www.uni-bielefeld.de/_internal/cimg!0/q648sw6ek89zfl4lbisrq4zj5in5f1d.png0.0 ms5.5 KiB
www.uni-bielefeld.de/_internal/cimg!0/miaxxruf94r02vivh4n4blf0d3l6mjt.png0.0 ms5.2 KiB
www.uni-bielefeld.de/_internal/cimg!0/k8c2n3pt7ohlnqw1rcq54gq99zmirg7.png0.0 ms4.7 KiB
/(cache-forever,mtime=1776688681)/assets/vendor/hyphenopo...0.0 ms4.4 KiB
www.uni-bielefeld.de/_internal/cimg!0/e751mmsia2949y9ozich6p8y7b7corv.png0.0 ms4.3 KiB
www.uni-bielefeld.de/(cache-forever,mtime=1776688695)/assets/js/head.js0.0 ms3.8 KiB
/(cache-forever,mtime=1776688681)/assets/vendor/hyphenopo...0.0 ms3.3 KiB
www.uni-bielefeld.de/_ext/js/ubf-cookie-consent/ubf_cookieconsent.min.js0.0 ms3.3 KiB

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
/(cache-forever,mtime=1776688716)/assets/fonts/Lelo-Bold....40 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:2.58 source:map[column:65189 line:10 type:source-location url:https://www.uni-bielefeld.de/(cache-forever,mtime=1776692512)/assets/js/app.js 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:12.903 source:map[type:text value:[unattributed]]] map[reflowTime:20.714 source:map[column:61598 line:1 type:source-location url:https://www.uni-bielefeld.de/(cache-forever,mtime=1776692512)/assets/js/app.js urlProvider:network]] map[reflowTime:0.078 source:map[column:49223 line:9 type:source-location url:https://www.uni-bielefeld.de/(cache-forever,mtime=1776692512)/assets/js/app.js urlProvider:network]] map[reflowTime:0.274 source:map[column:258429 line:9 type:source-location url:https://www.uni-bielefeld.de/(cache-forever,mtime=1776692512)/assets/js/app.js urlProvider:network]] map[reflowTime:0.191 source:map[column:108140 line:9 type:source-location url:https://www.uni-bielefeld.de/(cache-forever,mtime=1776692512)/assets/js/app.js urlProvider:network]] map[reflowTime:0.458 source:map[column:270610 line:9 type:source-location url:https://www.uni-bielefeld.de/(cache-forever,mtime=1776692512)/assets/js/app.js urlProvider:network]] map[reflowTime:2.876 source:map[column:70831 line:9 type:source-location url:https://www.uni-bielefeld.de/(cache-forever,mtime=1776692512)/assets/js/app.js urlProvider:network]] map[reflowTime:1.24 source:map[column:158764 line:9 type:source-location url:https://www.uni-bielefeld.de/(cache-forever,mtime=1776692512)/assets/js/app.js urlProvider:network]] map[reflowTime:0.714 source:map[column:159056 line:9 type:source-location url:https://www.uni-bielefeld.de/(cache-forever,mtime=1776692512)/assets/js/app.js urlProvider:network]] map[reflowTime:0.633 source:map[column:176325 line:9 type:source-location url:https://www.uni-bielefeld.de/(cache-forever,mtime=1776692512)/assets/js/app.js urlProvider:network]] map[reflowTime:2.58 source:map[column:148099 line:9 type:source-location url:https://www.uni-bielefeld.de/(cache-forever,mtime=1776692512)/assets/js/app.js 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
The Power of the Individual – Talks Now Online - Universität Bielefeld div.ubf-mainnews-item__visual > a.ubf-mainnews-item__thumbLink > figure.ubf-mainnews-item__picture > img.ubf-picture__img
/wp-content/themes/wp-unibi-theme-2021-1/img/default-img/...321.1 KiB314.4 KiB
Project advances protection of Atlantic corals - Universität Bielefeld div.ubf-mainnews-item__visual > a.ubf-mainnews-item__thumbLink > figure.ubf-mainnews-item__picture > img.ubf-picture__img
aktuell.uni-bielefeld.de/wp-content/uploads/2026/04/DSC01301-400x400.jpg82.4 KiB64.1 KiB
Three questions on post-socialism and coloniality - Universität Bielefeld div.ubf-mainnews-item__visual > a.ubf-mainnews-item__thumbLink > figure.ubf-mainnews-item__picture > img.ubf-picture__img
/wp-content/uploads/2026/04/ZiF-GRP-Postcolonial-and-Post...46.9 KiB28.5 KiB

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.uni-bielefeld.de/http/1.1
/(cache-forever,mtime=1776688679)/assets/fonts/Lelo-Regul...http/1.1
www.uni-bielefeld.de/(cache-forever,mtime=1776688716)/assets/css/critical.csshttp/1.1
www.uni-bielefeld.de/(cache-forever,mtime=1776688695)/assets/js/head.jshttp/1.1
/(cache-forever,mtime=1776688681)/assets/vendor/hyphenopo...http/1.1
/(cache-forever,mtime=1776688732)/assets/img/favicons/sit...http/1.1
www.uni-bielefeld.de/(cache-forever,mtime=1776688696)/assets/js/libs.jshttp/1.1
www.uni-bielefeld.de/(cache-forever,mtime=1776692512)/assets/js/app.jshttp/1.1
www.uni-bielefeld.de/_ext/js/ubf-cookie-consent/ubf_cookieconsent.min.jshttp/1.1
/(cache-forever,mtime=1776688681)/assets/vendor/hyphenopo...http/1.1
/(cache-forever,mtime=1776688681)/assets/vendor/hyphenopo...http/1.1
/(cache-forever,mtime=1776688681)/assets/vendor/hyphenopo...http/1.1
/(cache-forever,mtime=1776688681)/assets/vendor/hyphenopo...http/1.1
/(cache-forever,mtime=1776688716)/assets/fonts/Lelo-Bold....http/1.1
/(cache-forever,mtime=1776688722)/assets/css/non-critical...http/1.1
www.uni-bielefeld.de/_internal/cimg!0/n94djbeo8bvnlz5h7ow3r4nnhgk04m8.jpeghttp/1.1
www.uni-bielefeld.de/_internal/cimg!0/pvl4lv1ofjr0i3oq7h52siim9r05fbl.jpeghttp/1.1
www.uni-bielefeld.de/_internal/cimg!0/fxp2afeht1wtanobfmgsht2jpp4tmed.jpeghttp/1.1
www.uni-bielefeld.de/_internal/cimg!0/7ylkxr7j2xdl0kj24omr4ymf6ay2ggg.pnghttp/1.1
www.uni-bielefeld.de/_internal/cimg!0/hv477gpo20wa9hse4rhlcaj5ugutwh5.pnghttp/1.1
www.uni-bielefeld.de/_internal/cimg!0/6cd7vm8st92aoqehbr209twoga6jnu0.pnghttp/1.1
www.uni-bielefeld.de/_internal/cimg!0/q648sw6ek89zfl4lbisrq4zj5in5f1d.pnghttp/1.1
www.uni-bielefeld.de/_internal/cimg!0/j6e833r20btb4jr4r4jduzgjcr6r49l.pnghttp/1.1
www.uni-bielefeld.de/_internal/cimg!0/e751mmsia2949y9ozich6p8y7b7corv.pnghttp/1.1
www.uni-bielefeld.de/_internal/cimg!0/miaxxruf94r02vivh4n4blf0d3l6mjt.pnghttp/1.1
www.uni-bielefeld.de/_internal/cimg!0/g9j2mevv0gdzla0w5qkin59eoraiu2o.pnghttp/1.1
www.uni-bielefeld.de/_internal/cimg!0/k8c2n3pt7ohlnqw1rcq54gq99zmirg7.pnghttp/1.1
/(cache-forever,mtime=1776688731)/assets/img/favicons/fav...http/1.1
www.uni-bielefeld.de/(cache-forever,mtime=1776688706)/assets/css/print.csshttp/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
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
/(cache-forever,mtime=1776688681)/assets/vendor/hyphenopo...3.3 KiB123 ms
www.uni-bielefeld.de/(cache-forever,mtime=1776688695)/assets/js/head.js3.8 KiB123 ms
www.uni-bielefeld.de/(cache-forever,mtime=1776688716)/assets/css/critical.css22.4 KiB83 ms

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

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 40 ms 54.7 KiB
URLTransfer SizeEst Savings
/(cache-forever,mtime=1776688722)/assets/css/non-critical...26.3 KiB24.1 KiB
www.uni-bielefeld.de/(cache-forever,mtime=1776688716)/assets/css/critical.css22.0 KiB18.1 KiB
www.uni-bielefeld.de/(cache-forever,mtime=1776688706)/assets/css/print.css12.6 KiB12.6 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: 80 ms 80.5 KiB
URLTransfer SizeEst Savings
www.uni-bielefeld.de/(cache-forever,mtime=1776692512)/assets/js/app.js91.4 KiB43.6 KiB
www.uni-bielefeld.de/(cache-forever,mtime=1776688696)/assets/js/libs.js55.4 KiB36.9 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
Logo Weltoffene Hochschulen li.ubf-footer__menuItem > a.ubf-footer__menuLink > figure.ubf-footer__picture > img.ubf-picture__img
www.uni-bielefeld.de/_internal/cimg!0/miaxxruf94r02vivh4n4blf0d3l6mjt.png
Logo Oberservatory Magna Charta Universitatum li.ubf-footer__menuItem > a.ubf-footer__menuLink > figure.ubf-footer__picture > img.ubf-picture__img
www.uni-bielefeld.de/_internal/cimg!0/e751mmsia2949y9ozich6p8y7b7corv.png
Logo Data Literacy Charta li.ubf-footer__menuItem > a.ubf-footer__menuLink > figure.ubf-footer__picture > img.ubf-picture__img
www.uni-bielefeld.de/_internal/cimg!0/k8c2n3pt7ohlnqw1rcq54gq99zmirg7.png
Logo AKK Rat li.ubf-footer__menuItem > a.ubf-footer__menuLink > figure.ubf-footer__picture > img.ubf-picture__img
www.uni-bielefeld.de/_internal/cimg!0/q648sw6ek89zfl4lbisrq4zj5in5f1d.png
Logo Neolaia li.ubf-footer__menuItem > a.ubf-footer__menuLink > figure.ubf-footer__picture > img.ubf-picture__img
www.uni-bielefeld.de/_internal/cimg!0/hv477gpo20wa9hse4rhlcaj5ugutwh5.png
Logo total-e-quality li.ubf-footer__menuItem > a.ubf-footer__menuLink > figure.ubf-footer__picture > img.ubf-picture__img
www.uni-bielefeld.de/_internal/cimg!0/j6e833r20btb4jr4r4jduzgjcr6r49l.png
Logo Familiengerechte Hochschule li.ubf-footer__menuItem > a.ubf-footer__menuLink > figure.ubf-footer__picture > img.ubf-picture__img
www.uni-bielefeld.de/_internal/cimg!0/g9j2mevv0gdzla0w5qkin59eoraiu2o.png
Logo Corporate Health Award Handelsblatt - Uni Bielefeld li.ubf-footer__menuItem > a.ubf-footer__menuLink > figure.ubf-footer__picture > img.ubf-picture__img
www.uni-bielefeld.de/_internal/cimg!0/7ylkxr7j2xdl0kj24omr4ymf6ay2ggg.png
Logo Prädikat Gleichstellung li.ubf-footer__menuItem > a.ubf-footer__menuLink > figure.ubf-footer__picture > img.ubf-picture__img
www.uni-bielefeld.de/_internal/cimg!0/6cd7vm8st92aoqehbr209twoga6jnu0.png
Symbole der Bielefelder Forschungswelten div.ubf-contentBlock__text > div.ubf-text__content > figure > img
data:image/gif;base64,R0lGODlhAQABAAAAADs=

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

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: 204 ms
URLTime Spent
uni-bielefeld.de/204 ms
www.uni-bielefeld.de/0.0 ms
●Time to Interactive 1.4 s
●Layout shift culprits
●Optimize DOM size
●LCP breakdown
●Optimize viewport for mobile
●Max Potential First Input Delay 50 ms
●Minify CSS
●Minify JavaScript
●Avoids enormous network payloads Total size was 1,494 KiB
●JavaScript execution time 0.1 s
●Minimizes main-thread work 0.3 s
●Avoid non-composited animations 17 animated elements found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 30 ms
●Server Backend Latencies 0 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 530 ms
●Avoid large layout shifts 1 layout shift found
○INP breakdown
○LCP request discovery
○User Timing marks and measures
○Avoid long main-thread tasks
78

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
In times of crisis, we need spaces for creativity div.ubf-slideshow__navigation > ul.ubf-slideshowNavigation__items > li.ubf-slideshowNavigation__item > a#label_slideshow-comp_000062cf78a8_00000029cf_36ca-0

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
go to previous content div.ubf-contentBlock > div.ubf-contentBlock__slideshow > div.ubf-slideshow__navigation > ul.ubf-slideshowNavigation__items

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

Names and labels

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
nav.ubf-mainMenu__content > ul.ubf-mainMenu__items > li.ubf-mainMenu__item > a.ubf-mainMenu__link nav.ubf-mainMenu__content > ul.ubf-mainMenu__items > li.ubf-mainMenu__item > a.ubf-mainMenu__link

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

Tables and lists

Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
In times of cri­sis, we need spaces for cre­ativ­ity How do good ideas emerge—… section.ubf-page__section > div.ubf-contentBlock > div.ubf-contentBlock__slideshow > ul.ubf-slideshow__slides
Service Ap­pli­ca­tion Cam­pus and Con­struc­tion Courses Dates and Dead­lines … footer#footer > div.ubf-footer__content > nav.ubf-footer__menu > ul.ubf-footer__menuSections

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
go to previous content div.ubf-contentBlock__slideshow > div.ubf-slideshow__navigation > ul.ubf-slideshowNavigation__items > li.ubf-slideshowNavigation__item
go to next content div.ubf-contentBlock__slideshow > div.ubf-slideshow__navigation > ul.ubf-slideshowNavigation__items > li.ubf-slideshowNavigation__item

These are opportunities to improve the experience of reading tabular or list data using 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
avoid automatic content change body#top > span.ubf-skip-links > button.ubf-skip-links__link

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
●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
●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.
●Touch targets have sufficient size and spacing.
●`[lang]` attributes have a valid value
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Uses ARIA roles only on compatible elements
●Identical links have the same purpose.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○`[role]`s are contained by their required parent element
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○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.
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Image elements do not have `[alt]` attributes that are redundant text.
○Elements with visible text labels have matching accessible names.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
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 clickjacking with XFO or CSP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
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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