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Lighthouse Mobile

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

Audit breakdown by category with detailed findings.

35

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
www.alaska.edu/_images/Dixie_Coggins_1.png0.0 ms1.1 MiB
www.alaska.edu/alaska/images/University-Alaska-Map-2025.jpg0.0 ms947.9 KiB
www.alaska.edu/news/images/ANSEP.dunbar.thumbnail.png0.0 ms932.7 KiB
www.alaska.edu/_images/UA_1600x500_0006_Anthem.jpg0.0 ms807.3 KiB
www.alaska.edu/news/images/2024%20UAF%20commencement1.jpg0.0 ms772.1 KiB
www.alaska.edu/news/images/field-trip-2023.png0.0 ms550.4 KiB
/news/images/CONOCOPHILLIPS PROCESS TECH CHECK PRESENTATI...0.0 ms530.9 KiB
www.alaska.edu/_images/UA_1600x500_0000_Native.jpg0.0 ms525.0 KiB
www.alaska.edu/_images/cm-1600x500.jpg0.0 ms500.3 KiB
www.alaska.edu/news/images/workforce-2023.png0.0 ms459.1 KiB
www.alaska.edu/_images/UA_1600x500_0004_Circle%20of%20Giving.jpg0.0 ms439.3 KiB
www.alaska.edu/news/images/11-21-technology.jpg0.0 ms239.1 KiB
www.alaska.edu/news/images/11-21-winter-campus.jpg0.0 ms222.2 KiB
www.alaska.edu/alaska/images/SAF%20Image3.jpg0.0 ms134.6 KiB
www.alaska.edu/alaska/images/24UNV003-Landing-page-graphic_A.jpg0.0 ms105.2 KiB
connect.facebook.net/en_US/fbevents.js1200.0 s96.6 KiB
www.alaska.edu/alaska/images/UA%20Empower_400x400%20size.png0.0 ms84.3 KiB
www.alaska.edu/news/images/Alaska%20capitol.jpg0.0 ms69.2 KiB
www.alaska.edu/news/images/2022%20UA%20Foundation%20logo.jpg0.0 ms59.1 KiB
www.alaska.edu/_resources/js/slick/slick.min.js0.0 ms42.3 KiB
/signals/config/665010643222755?v=2.9.303&r=stable&domain...1200.0 s44.7 KiB
www.alaska.edu/_resources/css/global.css?v=2.2.90.0 ms38.2 KiB
www.alaska.edu/alaska/images/Teach%20Alaska%20-400x400.jpg0.0 ms38.1 KiB
www.alaska.edu/_resources/images/sw-logo.svg0.0 ms30.8 KiB
www.alaska.edu/_resources/css/sw.css?v=2.1.90.0 ms21.3 KiB
www.google-analytics.com/analytics.js7200.0 s20.9 KiB
www.alaska.edu/_resources/images/swlogo.png0.0 ms6.3 KiB
static.hotjar.com/c/hotjar-695052.js?sv=660.0 s6.3 KiB
www.alaska.edu/_resources/js/global.js?version=2.10.0 ms6.2 KiB
kit.fontawesome.com/03f3fd53ff.js60.0 s5.7 KiB
cse.google.com/cse.js?cx=009262098191286400227:clre0hswmzs0.0 ms3.7 KiB
acdn.adnxs.com/dmp/up/pixie.js86402.0 s9.2 KiB
www.alaska.edu/alaska/style.css?v=2.60.0 ms2.7 KiB
www.alaska.edu/_resources/js/slick/initialization.js0.0 ms1.2 KiB
www.alaska.edu/_resources/images/mountains.svg0.0 ms1.1 KiB
www.google.com/cse/static/style/look/v6/default.css3000.0 s1.2 KiB
www.alaska.edu/_resources/js/direct-edit.js0.0 ms932 B
/tr/?id=665010643222755&ev=PageView&dl=https%3A%2F%2Fwww....0.0 ms19 B
/a?id=G-RZ9BT2W7VV&v=3&t=t&pid=725164660&gtm=45je64k0v911...0.0 ms11 B
/a?id=G-RZ9BT2W7VV&v=3&t=t&pid=725164660&gtm=45je64k0v911...0.0 ms11 B
/a?id=G-RZ9BT2W7VV&v=3&t=t&pid=725164660&gtm=45je64k0v911...0.0 ms11 B
/a?id=G-RZ9BT2W7VV&v=3&t=t&pid=725164660&gtm=45je64k0v911...0.0 ms11 B
/a?id=G-RZ9BT2W7VV&v=3&t=t&pid=725164660&gtm=45je64k0v911...0.0 ms11 B
/a?id=G-RZ9BT2W7VV&v=3&t=t&pid=725164660&gtm=45je64k0v911...0.0 ms11 B

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:0.133708] map[node:map[boundingRect:map[bottom:9958 height:9343 left:1 right:411 top:615 width:410] lhId:page-17-DIV nodeLabel:Information for Prospective Students Degrees and Programs Browse offerings from… path:1,HTML,1,BODY,11,MAIN,0,DIV,0,DIV,0,DIV,0,DIV selector:div.main-content > div.page-content > div.row > div.col snippet:<div class="col"> type:node] score:0.116902] map[node:map[boundingRect:map[bottom:1160 height:167 left:17 right:395 top:993 width:378] lhId:page-23-DIV nodeLabel:Degrees and Programs Browse offerings from short-course workforce training, to … path:1,HTML,1,BODY,11,MAIN,0,DIV,0,DIV,0,DIV,0,DIV,2,DIV,0,DIV,0,DIV,0,DIV,1,DIV selector:div.row > div.card-vertical > div.card > div.card-content snippet:<div class="card-content d-flex flex-column" style="flex: 1 0 0%; margin-bottom: 0;"> type:node] score:0.016749] map[node:map[boundingRect:map[bottom:168 height:42 left:275 right:401 top:126 width:126] lhId:page-22-A nodeLabel:SEARCH path:1,HTML,1,BODY,6,HEADER,1,DIV,2,DIV,1,DIV,0,DIV,1,DIV,0,A selector:div.headerRight > div.siteBarContainer > div.swSearch > a.btn snippet:<a class="btn my-sm-0" data-target="#searchToggle" data-toggle="collapse" aria-controls="searchToggle" aria-expanded="false" aria-haspopup="true" aria-label="search toggle button" tabindex="0" href="#searchToggle"> type:node] score:5.7e-05]]

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.

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
archival black and white photo with a woman with short brown hair, smiling ul > li > div.newsImage > img
www.alaska.edu/_images/Dixie_Coggins_1.png1.1 MiB1.1 MiB
two men exchange a framed paper and shake hands ul > li > div.newsImage > img
www.alaska.edu/news/images/ANSEP.dunbar.thumbnail.png932.3 KiB929.4 KiB
UAF campus div#myCarousel > div.carousel-inner > div.carousel-item > img.d-block
www.alaska.edu/_images/UA_1600x500_0006_Anthem.jpg807.0 KiB780.5 KiB
in a line of graduates, a woman wearing a graduation cap and gown smiles ul > li > div.newsImage > img
www.alaska.edu/news/images/2024%20UAF%20commencement1.jpg771.7 KiB768.9 KiB
a large group of men and women hold a giant check ul > li > div.newsImage > img
/news/images/CONOCOPHILLIPS PROCESS TECH CHECK PRESENTATI...530.5 KiB527.7 KiB
A class walks along Turnagin Arm on a field trip div.card > div.card-image > a.linked-img > img.img-fluid
www.alaska.edu/news/images/field-trip-2023.png550.0 KiB511.0 KiB
Female automotive mechanic student div.card > div.card-image > a.linked-img > img.img-fluid
www.alaska.edu/news/images/workforce-2023.png458.7 KiB419.7 KiB
The remains of an Anchorage elementary school after the M9.2 Great Alaska Earth… ul > li > div.newsImage > img
media.ktoo.org/wp-content/uploads/2026/03/48-earthquake1964.jpeg205.2 KiB202.5 KiB
Students work in 3-D print lab div.card > div.card-image > a.linked-img > img.img-fluid
www.alaska.edu/news/images/11-21-technology.jpg238.7 KiB199.7 KiB
A student walks through snow to the Integrated Science Building in Anchorage div.card > div.card-image > a.linked-img > img.img-fluid
www.alaska.edu/news/images/11-21-winter-campus.jpg221.8 KiB182.7 KiB
Farmers harvest seaweed near Kodiak. ul > li > div.newsImage > img
/newsminer.com/content/tncms/assets/v3/editorial/2/0b/20b...122.5 KiB119.9 KiB
Text over image of a person outdoors says: Systemwide Attainment Framework. Rec… div.col-md > div.ou-component-imagetile > a.linked-img > img.tile-image
www.alaska.edu/alaska/images/SAF%20Image3.jpg134.2 KiB116.5 KiB
Graphic of female at a computer with text saying "Financial Aid is Available" div.col-md > div.ou-component-imagetile > a.linked-img > img.tile-image
www.alaska.edu/alaska/images/24UNV003-Landing-page-graphic_A.jpg104.9 KiB78.8 KiB
University of Alaska Southeast Chancellor Aparna Palmer embraces Chalyee Éesh R… ul > li > div.newsImage > img
/media/0df355_cfbe53074b654ec7924ad6bc7ef4f755~mv2.jpg/v1...69.1 KiB67.8 KiB
the front steps of the Alaska capitol ul > li > div.newsImage > img
www.alaska.edu/news/images/Alaska%20capitol.jpg68.8 KiB66.1 KiB
Student stands in front of sculpture on campus div.col-md > div.ou-component-imagetile > a.linked-img > img.tile-image
www.alaska.edu/alaska/images/UA%20Empower_400x400%20size.png83.9 KiB57.9 KiB
UA Foundation logo ul > li > div.newsImage > img
www.alaska.edu/news/images/2022%20UA%20Foundation%20logo.jpg58.7 KiB54.7 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:1903.923 label:Time to first byte subpart:timeToFirstByte] map[duration:10.8 label:Resource load delay subpart:resourceLoadDelay] map[duration:1883.851 label:Resource load duration subpart:resourceLoadDuration] map[duration:23.345 label:Element render delay subpart:elementRenderDelay]]
lhId: page-2-IMG
nodeLabel: UAF campus
path: 1,HTML,1,BODY,7,DIV,0,DIV,0,DIV,0,DIV,0,IMG
selector: div#myCarousel > div.carousel-inner > div.carousel-item > img.d-block
snippet: <img alt="UAF campus" class="d-block img-fluid" src="/_images/UA_1600x500_0006_Anthem.jpg">

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-2-IMG
nodeLabel: UAF campus
path: 1,HTML,1,BODY,7,DIV,0,DIV,0,DIV,0,DIV,0,IMG
selector: div#myCarousel > div.carousel-inner > div.carousel-item > img.d-block
snippet: <img alt="UAF campus" class="d-block img-fluid" src="/_images/UA_1600x500_0006_Anthem.jpg">

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.

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.alaska.edu/alaska/http/1.1
www.alaska.edu/_resources/css/global.css?v=2.2.9http/1.1
www.alaska.edu/_resources/css/sw.css?v=2.1.9http/1.1
www.alaska.edu/alaska/style.css?v=2.6http/1.1
www.alaska.edu/_resources/images/sw-logo.svghttp/1.1
www.alaska.edu/_images/UA_1600x500_0006_Anthem.jpghttp/1.1
www.alaska.edu/_images/cm-1600x500.jpghttp/1.1
www.alaska.edu/_images/UA_1600x500_0000_Native.jpghttp/1.1
www.alaska.edu/_images/UA_1600x500_0004_Circle%20of%20Giving.jpghttp/1.1
www.alaska.edu/news/images/11-21-technology.jpghttp/1.1
www.alaska.edu/news/images/field-trip-2023.pnghttp/1.1
www.alaska.edu/news/images/11-21-winter-campus.jpghttp/1.1
www.alaska.edu/news/images/workforce-2023.pnghttp/1.1
www.alaska.edu/alaska/images/Teach%20Alaska%20-400x400.jpghttp/1.1
www.alaska.edu/alaska/images/UA%20Empower_400x400%20size.pnghttp/1.1
www.alaska.edu/alaska/images/24UNV003-Landing-page-graphic_A.jpghttp/1.1
www.alaska.edu/alaska/images/SAF%20Image3.jpghttp/1.1
www.alaska.edu/news/images/2022%20UA%20Foundation%20logo.jpghttp/1.1
www.alaska.edu/news/images/Alaska%20capitol.jpghttp/1.1
www.alaska.edu/news/images/2024%20UAF%20commencement1.jpghttp/1.1
www.alaska.edu/news/images/ANSEP.dunbar.thumbnail.pnghttp/1.1
www.alaska.edu/_images/Dixie_Coggins_1.pnghttp/1.1
/news/images/CONOCOPHILLIPS PROCESS TECH CHECK PRESENTATI...http/1.1
www.alaska.edu/alaska/images/University-Alaska-Map-2025.jpghttp/1.1
www.alaska.edu/_resources/images/swlogo.pnghttp/1.1
www.alaska.edu/_resources/js/slick/slick.min.jshttp/1.1
www.alaska.edu/_resources/js/slick/initialization.jshttp/1.1
www.alaska.edu/_resources/js/global.js?version=2.1http/1.1
www.alaska.edu/_resources/js/direct-edit.jshttp/1.1
www.alaska.edu/_resources/images/mountains.svghttp/1.1
www.alaska.edu/_resources/images/favicon.icohttp/1.1

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

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

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: 2.7 s

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
Information for Prospective Students Degrees and Programs Browse offerings from… div.main-content > div.page-content > div.row > div.col
0.117
Degrees and Programs Browse offerings from short-course workforce training, to … div.row > div.card-vertical > div.card > div.card-content
0.017
SEARCH div.headerRight > div.siteBarContainer > div.swSearch > a.btn
0.000

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Diagnostics

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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.

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation1.7 s
Other745 ms
Style & Layout371 ms
Script Parsing & Compilation358 ms
Rendering127 ms
Parse HTML & CSS46 ms
Garbage Collection29 ms

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: 0.0 ms 12.8 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
Map of UA campuses div.row > div.col-md > a.linked-img > img
www.alaska.edu/alaska/images/University-Alaska-Map-2025.jpg
The remains of an Anchorage elementary school after the M9.2 Great Alaska Earth… ul > li > div.newsImage > img
media.ktoo.org/wp-content/uploads/2026/03/48-earthquake1964.jpeg
in a line of graduates, a woman wearing a graduation cap and gown smiles ul > li > div.newsImage > img
www.alaska.edu/news/images/2024%20UAF%20commencement1.jpg
University of Alaska Southeast Chancellor Aparna Palmer embraces Chalyee Éesh R… ul > li > div.newsImage > img
/media/0df355_cfbe53074b654ec7924ad6bc7ef4f755~mv2.jpg/v1...
Farmers harvest seaweed near Kodiak. ul > li > div.newsImage > img
/newsminer.com/content/tncms/assets/v3/editorial/2/0b/20b...
archival black and white photo with a woman with short brown hair, smiling ul > li > div.newsImage > img
www.alaska.edu/_images/Dixie_Coggins_1.png
the front steps of the Alaska capitol ul > li > div.newsImage > img
www.alaska.edu/news/images/Alaska%20capitol.jpg
two men exchange a framed paper and shake hands ul > li > div.newsImage > img
www.alaska.edu/news/images/ANSEP.dunbar.thumbnail.png
a large group of men and women hold a giant check ul > li > div.newsImage > img
/news/images/CONOCOPHILLIPS PROCESS TECH CHECK PRESENTATI...
A young girl is looking through a dreamcatcher held up to her eye div.col-md > div.ou-component-imagetile > a.linked-img > img.tile-image
www.alaska.edu/alaska/images/Teach%20Alaska%20-400x400.jpg
Students work in 3-D print lab div.card > div.card-image > a.linked-img > img.img-fluid
www.alaska.edu/news/images/11-21-technology.jpg
A class walks along Turnagin Arm on a field trip div.card > div.card-image > a.linked-img > img.img-fluid
www.alaska.edu/news/images/field-trip-2023.png
A student walks through snow to the Integrated Science Building in Anchorage div.card > div.card-image > a.linked-img > img.img-fluid
www.alaska.edu/news/images/11-21-winter-campus.jpg
Female automotive mechanic student div.card > div.card-image > a.linked-img > img.img-fluid
www.alaska.edu/news/images/workforce-2023.png
UA Foundation logo ul > li > div.newsImage > img
www.alaska.edu/news/images/2022%20UA%20Foundation%20logo.jpg
Student stands in front of sculpture on campus div.col-md > div.ou-component-imagetile > a.linked-img > img.tile-image
www.alaska.edu/alaska/images/UA%20Empower_400x400%20size.png
Graphic of female at a computer with text saying "Financial Aid is Available" div.col-md > div.ou-component-imagetile > a.linked-img > img.tile-image
www.alaska.edu/alaska/images/24UNV003-Landing-page-graphic_A.jpg
Text over image of a person outdoors says: Systemwide Attainment Framework. Rec… div.col-md > div.ou-component-imagetile > a.linked-img > img.tile-image
www.alaska.edu/alaska/images/SAF%20Image3.jpg
University of Alaska div.container > p > a.linked-img > img
www.alaska.edu/_resources/images/swlogo.png

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

Optimize DOM size
Forced reflow
Optimize viewport for mobile
Minify JavaScript
User Timing marks and measures 12 user timings
Avoid long main-thread tasks 15 long tasks found
Page didn't prevent back/forward cache restoration
Network Requests
Network Round Trip Times 210 ms
Server Backend Latencies 210 ms
Tasks
Diagnostics
Metrics
Screenshot Thumbnails
Final Screenshot
Script Treemap Data
Resources Summary
Initial server response time was short Root document took 210 ms
INP breakdown
Avoid non-composited animations
96

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Contrast

Low-contrast text is difficult or impossible for many users to read. Link text that is discernible improves the experience for users with low vision. Learn how to make links distinguishable.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
campuses div.row > div.col-md > h4 > a

These are opportunities to improve the legibility of your content.

Interactive controls are keyboard focusable
Interactive elements indicate their purpose and state
The page has a logical tab order
Visual order on the page follows DOM order
User focus is not accidentally trapped in a region
The user's focus is directed to new content added to the page
HTML5 landmark elements are used to improve navigation
Offscreen content is hidden from assistive technology
Custom controls have associated labels
Custom controls have ARIA roles
`[aria-*]` attributes match their roles
`[aria-hidden="true"]` is not present on the document `<body>`
`[role]`s have all required `[aria-*]` attributes
`[role]` values are valid
`[aria-*]` attributes have valid values
`[aria-*]` attributes are valid and not misspelled
Buttons have an accessible name
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.
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 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
Identical links have the same purpose.
`[accesskey]` values are unique
`button`, `link`, and `menuitem` elements have accessible names
Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
ARIA input fields have accessible names
ARIA `meter` elements have accessible names
ARIA `progressbar` elements have accessible names
Elements with 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
`<video>` elements contain a `<track>` element with `[kind="captions"]`
Tables have different content in the summary attribute and `<caption>`.
All heading elements contain content.
Uses ARIA roles only on compatible elements
Image elements do not have `[alt]` attributes that are redundant text.
Elements with visible text labels have matching accessible names.
Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
`<td>` elements in a large `<table>` have one or more table headers.
81

Best Practices

General

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
AttributionReporting
Uses HTTPS
Avoids third-party cookies
Allows users to paste into input fields
Avoids requesting the geolocation permission on page load
Avoids requesting the notification permission on page load
Displays images with correct aspect ratio
Serves images with appropriate resolution
Page has the HTML doctype
Properly defines charset
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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