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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.

52

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 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:21.706 source:map[column:3707 line:1 type:source-location url:https://peakhealthandfitness.co.uk/cdn/shop/t/12/assets/custom.js?v=97998125812085148381773868123 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:94.198 source:map[type:text value:[unattributed]]] map[reflowTime:6.208 source:map[column:40 line:2943 type:source-location url:https://peakhealthandfitness.co.uk/ urlProvider:network]] map[reflowTime:12.401 source:map[column:31084 line:0 type:source-location url:https://peakhealthandfitness.co.uk/cdn/shopifycloud/perf-kit/shopify-perf-kit-3.5.0.min.js urlProvider:network]] map[reflowTime:2.801 source:map[column:236 line:0 type:source-location url:https://peakhealthandfitness.co.uk/cdn/shop/t/12/assets/header-sticky.js?v=6403472091377118281773868144 urlProvider:network]] map[reflowTime:10.407 source:map[column:28229 line:0 type:source-location url:https://peakhealthandfitness.co.uk/cdn/shop/t/12/assets/swiper-bundle.min.js?v=2172511954140529931773868220 urlProvider:network]] map[reflowTime:5.883 source:map[column:33528 line:0 type:source-location url:https://peakhealthandfitness.co.uk/cdn/shop/t/12/assets/swiper-bundle.min.js?v=2172511954140529931773868220 urlProvider:network]] map[reflowTime:1.75 source:map[column:50028 line:0 type:source-location url:https://peakhealthandfitness.co.uk/cdn/shop/t/12/assets/swiper-bundle.min.js?v=2172511954140529931773868220 urlProvider:network]] map[reflowTime:2.259 source:map[column:6921 line:0 type:source-location url:https://peakhealthandfitness.co.uk/cdn/shop/t/12/assets/swiper-bundle.min.js?v=2172511954140529931773868220 urlProvider:network]] map[reflowTime:1.293 source:map[column:32639 line:0 type:source-location url:https://peakhealthandfitness.co.uk/cdn/shopifycloud/storefront/assets/storefront/remote_product_tracking-e0c70457.js urlProvider:network]] map[reflowTime:1.179 source:map[column:8591 line:0 type:source-location url:https://cdn.shopify.com/extensions/019e48d7-dd2a-7ee0-b317-cac1876dcb96/trustshop-631/assets/trustshop-global-script.module.min.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
Dale Atkinson near wellness equipment div.founder-story__wrap > div.founder-story__grid > div.founder-story__media > img.founder-story__image
/cdn/shop/files/0f1f5820-ddcc-43ba-8d2e-e79d5e52141b.jpg?...141.6 KiB45.4 KiB
Ice Baths & Cold Plunges a.card--media > div.card--stretch > div.media > img
/cdn/shop/collections/still-no-please-look-at-the-monk-pr...58.6 KiB31.8 KiB
Infrared Sauna & Home Saunas a.card--media > div.card--stretch > div.media > img
/cdn/shop/collections/commercial-product-photography-qual...53.2 KiB26.4 KiB
Payment Methods div#shopify-section-template--25447143014723__health_payment_banner_Vn3WRB > section.health-payment-banner > div.container > img.hpb-payment-image
peakhealthandfitness.co.uk/cdn/shop/files/Component_1_4.png?v=177465545823.8 KiB19.7 KiB
twin pump hot tub UK div.product-grid-item__thumbnail > a.d-block > div.media > img.motion-reduce
/cdn/shop/products/twin_pump_hot_tub_UK_360x.jpg?v=177462...34.9 KiB13.8 KiB
Infraredi LED Light Therapy Mask - Peak Health and Fitness div.product-grid-item__thumbnail > a.d-block > div.media > img.motion-reduce
/cdn/shop/files/Infraredi-LED-Light-Therapy-Mask-Peak-Hea...31.7 KiB10.6 KiB
Daily Express div.ai-press-features__item-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > a.ai-press-features__link-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > div.ai-press-features__logo-wrapper-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > img.ai-press-features__logo-adfdgd1frtnritktxnaigenblock451d75bvxjrt8
/cdn/shop/files/daily-express-cropped.png?v=1775644866&wi...9.1 KiB5.7 KiB
Men's Health div.ai-press-features__item-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > a.ai-press-features__link-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > div.ai-press-features__logo-wrapper-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > img.ai-press-features__logo-adfdgd1frtnritktxnaigenblock451d75bvxjrt8
peakhealthandfitness.co.uk/cdn/shop/files/men-health.png?v=1774441733&width=4006.9 KiB4.8 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-8-IMG
nodeLabel: Peak Health and Fitness
path: 1,HTML,1,BODY,12,MAIN,0,DIV,4,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,IMG
selector: div#swiper-wrapper-b33201e4bae710657 > div.swiper-slide > div#Slide-template--25447143014723__slideshow_7NeeGa-1 > img
snippet: <img src="https://peakhealthandfitness.co.uk/cdn/shop/files/WhatsApp_Image_2026-03-3…" alt="Peak Health and Fitness" srcset="//peakhealthandfitness.co.uk/cdn/shop/files/WhatsApp_Image_2026-03-30_at_0…" height="543" loading="lazy" sizes="100vw">

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.

More than 4 preconnect connections were found. These should be used sparingly and only to the most important origins.
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
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

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.

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

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTotal CPU TimeScript EvaluationScript Parse
Unattributable2.4 s168 ms0.0 ms
peakhealthandfitness.co.uk/2.4 s222 ms85 ms
peakhealthandfitness.co.uk/cdn/wpm/b7107b92aw4540d021pdd526a22md4e69ac9m.js1.1 s911 ms34 ms
www.googletagmanager.com/gtag/js?id=AW-11441748872660 ms598 ms58 ms
/cdn/s/trekkie.storefront.2aca6cb2c1aba778eb370d48aa89866...538 ms252 ms28 ms
/cdn/shopifycloud/storefront/assets/shop_events_listener-...492 ms476 ms2.2 ms
www.googletagmanager.com/gtag/js?id=GT-T9LXT45D322 ms251 ms67 ms
sp-micro-next.b-cdn.net/sp-micro.umd.js?shop=9a0a53-3.myshopify.com316 ms220 ms42 ms
/cdn/shop/t/12/assets/custom.js?v=97998125812085148381773...281 ms191 ms0.9 ms
/extensions/538183fa-e9d7-460f-8ede-f268bcd8b172/inbox-12...222 ms191 ms14 ms
connect.facebook.net/en_US/fbevents.js198 ms145 ms52 ms
/cdn/shopifycloud/perf-kit/shopify-perf-kit-3.5.0.min.js189 ms116 ms9.0 ms
/cdn/shopifycloud/shop-js/modules/v2/chunk.index_DqGc8uuP...186 ms113 ms0.7 ms
/signals/config/1675893560997093?v=2.9.324&r=stable&domai...166 ms137 ms28 ms
/cdn/shop/t/12/assets/swiper-bundle.min.js?v=217251195414...122 ms60 ms20 ms
/extensions/019e359c-d6f6-7bc5-bf5e-1e395bfe09df/restockr...108 ms79 ms28 ms
/web-pixels@7107b92aw4540d021pdd526a22md4e69ac9/app/web-p...101 ms99 ms1.4 ms
www.googletagmanager.com/gtag/js?id=GT-T9LXT45D&cx=c&gtm=4e65j195 ms28 ms66 ms
omnisnippet1.com/monitoring/monitoring.js?v=2026-05-21T1490 ms70 ms11 ms
/cdn/shopifycloud/storefront/assets/shopify_pay/storefron...72 ms59 ms12 ms
omnisnippet1.com/forms/main.js?v=2026-05-21T1463 ms46 ms16 ms
/web-pixels@7107b92aw4540d021pdd526a22md4e69ac9/app/web-p...61 ms58 ms2.0 ms
/cdn/shopifycloud/storefront/assets/storefront/load_featu...60 ms37 ms2.0 ms
/cdn/shopifycloud/shop-js/modules/v2/chunk.useEventListen...53 ms49 ms0.2 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation5.1 s
Other3.3 s
Style & Layout1.3 s
Script Parsing & Compilation662 ms
Rendering306 ms
Parse HTML & CSS264 ms
Garbage Collection120 ms

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: 0.0 ms 23.0 KiB
URLTransfer SizeEst Savings
/extensions/019e48d7-dd2a-7ee0-b317-cac1876dcb96/trustsho...23.0 KiB23.0 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.

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
Payment Methods div#shopify-section-template--25447143014723__health_payment_banner_Vn3WRB > section.health-payment-banner > div.container > img.hpb-payment-image
peakhealthandfitness.co.uk/cdn/shop/files/Component_1_4.png?v=1774655458
Daily Express div.ai-press-features__item-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > a.ai-press-features__link-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > div.ai-press-features__logo-wrapper-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > img.ai-press-features__logo-adfdgd1frtnritktxnaigenblock451d75bvxjrt8
/cdn/shop/files/daily-express-cropped.png?v=1775644866&wi...
Wales Online div.ai-press-features__item-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > a.ai-press-features__link-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > div.ai-press-features__logo-wrapper-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > img.ai-press-features__logo-adfdgd1frtnritktxnaigenblock451d75bvxjrt8
/cdn/shop/files/wales-online-logo-png_seeklogo-384442.png...
Ladbible div.ai-press-features__item-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > a.ai-press-features__link-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > div.ai-press-features__logo-wrapper-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > img.ai-press-features__logo-adfdgd1frtnritktxnaigenblock451d75bvxjrt8
/cdn/shop/files/Official_LADbible_Logo.png?v=1775644675&w...
UniLad div.ai-press-features__item-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > a.ai-press-features__link-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > div.ai-press-features__logo-wrapper-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > img.ai-press-features__logo-adfdgd1frtnritktxnaigenblock451d75bvxjrt8
peakhealthandfitness.co.uk/cdn/shop/files/unilad-1.webp?v=1775646091&width=400
The Mirror div.ai-press-features__item-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > a.ai-press-features__link-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > div.ai-press-features__logo-wrapper-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > img.ai-press-features__logo-adfdgd1frtnritktxnaigenblock451d75bvxjrt8
/cdn/shop/files/Daily_Mirror_logo.png?v=1775644650&width=400
Men's Health div.ai-press-features__item-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > a.ai-press-features__link-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > div.ai-press-features__logo-wrapper-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > img.ai-press-features__logo-adfdgd1frtnritktxnaigenblock451d75bvxjrt8
peakhealthandfitness.co.uk/cdn/shop/files/men-health.png?v=1774441733&width=400

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

Layout shift culprits
Document request latency
Optimize DOM size
Font display
LCP breakdown
Modern HTTP
Optimize viewport for mobile
Minify CSS
Minify JavaScript
User Timing marks and measures 56 user timings
Avoid long main-thread tasks 20 long tasks found
Avoid non-composited animations 1 animated element found
Page didn't prevent back/forward cache restoration
Network Requests
Network Round Trip Times 190 ms
Server Backend Latencies 1,740 ms
Tasks
Diagnostics
Metrics
Screenshot Thumbnails
Final Screenshot
Script Treemap Data
Resources Summary
Avoid multiple page redirects
Initial server response time was short Root document took 10 ms
Avoid large layout shifts 2 layout shifts found
INP breakdown
89

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.

Names and labels

When a button doesn't have an accessible name, screen readers announce it as "button", making it unusable for users who rely on screen readers. Learn how to make buttons more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.product-grid-item__action-visibal-cartxx > product-form > form#[object HTMLInputElement] > button.product-grid-item__actions__btn div.product-grid-item__action-visibal-cartxx > product-form > form#[object HTMLInputElement] > button.product-grid-item__actions__btn
div.product-grid-item__action-visibal-cartxx > product-form > form#[object HTMLInputElement] > button.product-grid-item__actions__btn div.product-grid-item__action-visibal-cartxx > product-form > form#[object HTMLInputElement] > button.product-grid-item__actions__btn
div.product-grid-item__content > div.product-grid-item__action-visibal-cartx > quick-view-modal > button.product-grid-item__actions__btn div.product-grid-item__content > div.product-grid-item__action-visibal-cartx > quick-view-modal > button.product-grid-item__actions__btn
div.product-grid-item__action-visibal-cartxx > product-form > form#[object HTMLInputElement] > button.product-grid-item__actions__btn div.product-grid-item__action-visibal-cartxx > product-form > form#[object HTMLInputElement] > button.product-grid-item__actions__btn
div.product-grid-item__content > div.product-grid-item__action-visibal-cartx > quick-view-modal > button.product-grid-item__actions__btn div.product-grid-item__content > div.product-grid-item__action-visibal-cartx > quick-view-modal > button.product-grid-item__actions__btn
div.product-grid-item__action-visibal-cartxx > product-form > form#[object HTMLInputElement] > button.product-grid-item__actions__btn div.product-grid-item__action-visibal-cartxx > product-form > form#[object HTMLInputElement] > button.product-grid-item__actions__btn
div.product-grid-item__content > div.product-grid-item__action-visibal-cartx > quick-view-modal > button.product-grid-item__actions__btn div.product-grid-item__content > div.product-grid-item__action-visibal-cartx > quick-view-modal > button.product-grid-item__actions__btn
div.product-grid-item__content > div.product-grid-item__action-visibal-cartx > quick-view-modal > button.product-grid-item__actions__btn div.product-grid-item__content > div.product-grid-item__action-visibal-cartx > quick-view-modal > button.product-grid-item__actions__btn
div.product-grid-item__content > div.product-grid-item__action-visibal-cartx > quick-view-modal > button.product-grid-item__actions__btn div.product-grid-item__content > div.product-grid-item__action-visibal-cartx > quick-view-modal > button.product-grid-item__actions__btn
div.product-grid-item__action-visibal-cartxx > product-form > form#[object HTMLInputElement] > button.product-grid-item__actions__btn div.product-grid-item__action-visibal-cartxx > product-form > form#[object HTMLInputElement] > button.product-grid-item__actions__btn
div.product-grid-item__action-visibal-cartxx > product-form > form#[object HTMLInputElement] > button.product-grid-item__actions__btn div.product-grid-item__action-visibal-cartxx > product-form > form#[object HTMLInputElement] > button.product-grid-item__actions__btn
div.product-grid-item__action-visibal-cartxx > product-form > form#[object HTMLInputElement] > button.product-grid-item__actions__btn div.product-grid-item__action-visibal-cartxx > product-form > form#[object HTMLInputElement] > button.product-grid-item__actions__btn

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
div.blog__post > article.article-card > div.article-card__info > a.article-content div.blog__post > article.article-card > div.article-card__info > a.article-content
article.article-card > div.article-card__info > h3.post-title > a.article-content article.article-card > div.article-card__info > h3.post-title > a.article-content
div.blog__post > article.article-card > div.article-card__info > a.article-content div.blog__post > article.article-card > div.article-card__info > a.article-content
article.article-card > div.article-card__info > h3.post-title > a.article-content article.article-card > div.article-card__info > h3.post-title > a.article-content
div.blog__post > article.article-card > div.article-card__info > a.article-content div.blog__post > article.article-card > div.article-card__info > a.article-content
article.article-card > div.article-card__info > h3.post-title > a.article-content article.article-card > div.article-card__info > h3.post-title > a.article-content

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.

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
The story behind Peak has been featured in leading UK publications press-features-adfdgd1frtnritktxnaigenblock451d75bvxjrt8.ai-press-features-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > div.ai-press-features__container-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > div.ai-press-features__header-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > div.ai-press-features__subtitle-adfdgd1frtnritktxnaigenblock451d75bvxjrt8
£4,499.00 dl > div.price__sale > dd.price__compare > s.price-item

These are opportunities to improve the legibility of your content.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Men's Health div.ai-press-features__carousel-wrapper-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > div.ai-press-features__carousel-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > div.ai-press-features__item-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > a.ai-press-features__link-adfdgd1frtnritktxnaigenblock451d75bvxjrt8
Ladbible div.ai-press-features__carousel-wrapper-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > div.ai-press-features__carousel-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > div.ai-press-features__item-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > a.ai-press-features__link-adfdgd1frtnritktxnaigenblock451d75bvxjrt8
UniLad div.ai-press-features__carousel-wrapper-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > div.ai-press-features__carousel-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > div.ai-press-features__item-adfdgd1frtnritktxnaigenblock451d75bvxjrt8 > a.ai-press-features__link-adfdgd1frtnritktxnaigenblock451d75bvxjrt8
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
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
`[role]` values are valid
`[aria-*]` attributes have valid values
`[aria-*]` attributes are valid and not misspelled
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.
`button`, `link`, and `menuitem` elements have accessible names
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
`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Definition list items are wrapped in `<dl>` elements
Document has a `<title>` element
`<html>` element has a `[lang]` attribute
`<html>` element has a valid value for its `[lang]` attribute
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.
`[accesskey]` values are unique
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 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
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.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
The document does not use `<meta http-equiv="refresh">`
`<object>` elements have alternate text
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.
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 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
92

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

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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
Document has a meta description
Page has successful HTTP status code
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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