Skip to content
https://player.vimeo.com

Lighthouse Desktop

· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
SCORE
0
GRADE
FIX
0
REVIEW
0
PASS
0
INFO
0

Detailed Report

Audit breakdown by category with detailed findings.

32

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
f.vimeocdn.com/cms/_next/static/chunks/fb6eed97-7a2d57b90f7d6188.js3600.0 s945.3 KiB
f.vimeocdn.com/cms/_next/static/chunks/7185-fc224426b2d88e12.js86400.0 s1.2 MiB
f.vimeocdn.com/cms/_next/static/media/d4dc2a2a69a5b184-s.p.ttf3600.0 s303.1 KiB
f.vimeocdn.com/cms/_next/static/media/7511a528ef2dfab0-s.p.ttf3600.0 s301.7 KiB
f.vimeocdn.com/cms/_next/static/media/849b64204698b59b-s.p.ttf3600.0 s298.8 KiB
f.vimeocdn.com/cms/_next/static/media/de47ff92894fa0df-s.p.woff23600.0 s198.5 KiB
f.vimeocdn.com/cms/_next/static/media/61d83b278d771394-s.p.woff23600.0 s195.1 KiB
f.vimeocdn.com/cms/_next/static/media/ea6b9767317b855b-s.p.woff23600.0 s168.0 KiB
f.vimeocdn.com/cms/_next/static/chunks/4831-253ac4bff1936828.js3600.0 s157.5 KiB
js.qualified.com/qualified.js?token=8Q5gZzYPjZ1nTCQs60.0 s117.4 KiB
assets.qualified.com/packs/media/Inter-SemiBold.fcb100c7.woff20.0 ms104.0 KiB
assets.qualified.com/packs/media/Inter-Regular.f1f0c35b.woff20.0 ms96.9 KiB
f.vimeocdn.com/cms/_next/static/chunks/4048-99e2b2dcf0c6028c.js86400.0 s240.0 KiB
transcend-cdn.com/cm/31e97cbf-355c-4f0d-8bad-9cd945121508/ui.js60.0 s86.3 KiB
f.vimeocdn.com/cms/_next/static/chunks/47bf8baf-e20b49444a715f32.js3600.0 s75.4 KiB
f.vimeocdn.com/cms/_next/static/css/2c22264791d2d245.css3600.0 s68.9 KiB
transcend-cdn.com/cm/31e97cbf-355c-4f0d-8bad-9cd945121508/airgap.js60.0 s50.7 KiB
web-sdk-cdn.singular.net/singular-sdk/1.4.7/singular-sdk.js0.0 ms47.5 KiB
f.vimeocdn.com/cms/_next/static/chunks/9192-3837a9f9ffd7a2a3.js3600.0 s59.0 KiB
f.vimeocdn.com/cms/_next/static/chunks/87c73c54-dd8d81ac9604067c.js3600.0 s53.3 KiB
f.vimeocdn.com/cms/_next/static/chunks/2173-b80350b3f89ede63.js86400.0 s103.3 KiB
/transform/8ec2ebe7-412a-4810-8d1c-b7bc885b4c7a/Enterpris...900.0 s43.0 KiB
f.vimeocdn.com/cms/scripts/eppoSnippet.min.js?t=17767967724113600.0 s45.4 KiB
/transform/8c0a2108-b83c-4c21-bfc0-a2eab8419e27/Showcase-...900.0 s37.0 KiB
/transform/50fae077-e18e-4e07-8f31-57f9b2bac3d8/BSPK-Data...900.0 s33.2 KiB
f.vimeocdn.com/cms/_next/static/chunks/620c25d9-919e177b5531293d.js3600.0 s29.2 KiB
f.vimeocdn.com/cms/_next/static/chunks/1f006d11-d1c098a1221a70cd.js3600.0 s26.8 KiB
f.vimeocdn.com/cms/_next/static/chunks/2561cf92-41cf0f6248b7416f.js3600.0 s26.0 KiB
f.vimeocdn.com/cms/_next/static/chunks/3e61fc0b-c34d8b8ec81853e1.js3600.0 s25.5 KiB
f.vimeocdn.com/cms/_next/static/chunks/7167-4f844be67de04ea7.js86400.0 s47.2 KiB
f.vimeocdn.com/cms/_next/static/chunks/18-725eeb4bbb62c8f7.js86400.0 s45.2 KiB
vimeo.bynder.com/transform/0de4b1bd-a37d-4db3-8a5c-8998302dc95d/Learn-Animation900.0 s19.5 KiB
www.google-analytics.com/analytics.js7200.0 s20.9 KiB
/transform/477445fd-bf42-4f22-a93e-3e1cf776c445/Blog-Unlo...900.0 s17.3 KiB
f.vimeocdn.com/cms/_next/static/chunks/990a3170-db382325a9d5d932.js3600.0 s18.5 KiB
f.vimeocdn.com/cms/_next/static/chunks/8123-d9f37e7f8776d117.js3600.0 s18.1 KiB
/transform/ed5e9f28-cab9-4a0a-a91a-aa00721f4201/Use-Cases...900.0 s15.4 KiB
static.elfsight.com/platform/platform.js3600.0 s14.7 KiB
snap.licdn.com/li.lms-analytics/insight.min.js86400.0 s18.7 KiB
bat.bing.com/p/insights/s/0.8.5986400.0 s15.6 KiB
/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312...86400.0 s10.7 KiB
f.vimeocdn.com/cms/scripts/eppoUtils.min.js?t=17767967724113600.0 s5.1 KiB
transcend-cdn.com/cm/31e97cbf-355c-4f0d-8bad-9cd945121508/cm.css60.0 s4.1 KiB
f.vimeocdn.com/cms/_next/static/chunks/webpack-ede19ee544667956.js86400.0 s5.5 KiB
ws.zoominfo.com/pixel/629a1c2c7915ca008f06ca1c0.0 ms2.0 KiB
web-sdk-cdn.singular.net/singular-gtm-interface/1.4.7/singular-gtm-interface.js0.0 ms1.6 KiB
cdn.builder.io/api/v1/pixel?apiKey=a0ff14f572344f4a8d7f9bf5a329737d15.0 s1.1 KiB
f.vimeocdn.com/cms/_next/static/chunks/9880-8cc0f3615e5dd643.js86400.0 s2.0 KiB
/cms/_next/static/chunks/app/[language]/layout-9a39500385...86400.0 s1.3 KiB
f.vimeocdn.com/cms/_next/static/css/efc6d7ac74b805c3.css3600.0 s642 B
/collect?v=2&fmt=js&pid=7516&time=1776797173257&li_adsId=...0.0 ms453 B
f.vimeocdn.com/cms/_next/static/css/ae34698ad98c79d0.css3600.0 s413 B
f.vimeocdn.com/cms/_next/static/chunks/main-app-5121283d51936c72.js86400.0 s543 B
/cms/_next/static/chunks/app/[language]/[[...page]]/page-...86400.0 s307 B

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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:79.252 source:map[column:44172 line:1 type:source-location url:https://f.vimeocdn.com/cms/_next/static/chunks/18-725eeb4bbb62c8f7.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:157.992 source:map[type:text value:[unattributed]]] map[reflowTime:28.541 source:map[column:42350 line:0 type:source-location url:https://f.vimeocdn.com/cms/_next/static/chunks/7167-4f844be67de04ea7.js urlProvider:network]] map[reflowTime:24.783 source:map[column:362905 line:0 type:source-location url:https://f.vimeocdn.com/cms/_next/static/chunks/7185-fc224426b2d88e12.js urlProvider:network]] map[reflowTime:25.928 source:map[column:362170 line:0 type:source-location url:https://f.vimeocdn.com/cms/_next/static/chunks/7185-fc224426b2d88e12.js urlProvider:network]]]

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:609.888 label:Time to first byte subpart:timeToFirstByte] map[duration:3889.28 label:Resource load delay subpart:resourceLoadDelay] map[duration:190.595 label:Resource load duration subpart:resourceLoadDuration] map[duration:580.92 label:Element render delay subpart:elementRenderDelay]]
lhId: page-0-IMG
nodeLabel: Man using a screen recorder and teleprompter
path: 1,HTML,1,BODY,1,DIV,2,DIV,2,DIV,2,DIV,3,DIV,0,SECTION,0,DIV,1,UL,2,LI,0,DIV,0,A,0,DIV,0,IMG
selector: div.no-underline > a.flex > div.asset-image-container > img.progressive-image
snippet: <img src="https://i.vimeocdn.com/custom_asset/91aba30f8368f1badc48d235aae394b1?q=80" alt="Man using a screen recorder and teleprompter" aria-hidden="false" class="progressive-image object-center object-cover w-full h-full md:aspect-[1/1]…" fetchpriority="auto">

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-0-IMG
nodeLabel: Man using a screen recorder and teleprompter
path: 1,HTML,1,BODY,1,DIV,2,DIV,2,DIV,2,DIV,3,DIV,0,SECTION,0,DIV,1,UL,2,LI,0,DIV,0,A,0,DIV,0,IMG
selector: div.no-underline > a.flex > div.asset-image-container > img.progressive-image
snippet: <img src="https://i.vimeocdn.com/custom_asset/91aba30f8368f1badc48d235aae394b1?q=80" alt="Man using a screen recorder and teleprompter" aria-hidden="false" class="progressive-image object-center object-cover w-full h-full md:aspect-[1/1]…" fetchpriority="auto">

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

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.

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
Video showcases a.flex > div.asset-container > picture.asset-bynder-container > img.progressive-image
/transform/8c0a2108-b83c-4c21-bfc0-a2eab8419e27/Showcase-...36.3 KiB30.8 KiB
Automatic captions div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/7c24f9f228be574fabdb664b8ed89ae3?q=131.3 KiB30.4 KiB
Video data residency a.flex > div.asset-container > picture.asset-bynder-container > img.progressive-image
/transform/50fae077-e18e-4e07-8f31-57f9b2bac3d8/BSPK-Data...32.6 KiB26.9 KiB
Online video player div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/ceeef140b73293bafc315324a09361a1?q=127.6 KiB26.9 KiB
Edit video like a pro div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/dbd62cca2b1dc17132cb30f21b59e1fc?q=126.9 KiB26.4 KiB
Video collaboration div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/6ab961dc71041adb72962b72a00750b0?q=126.4 KiB25.7 KiB
AI translation div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/4423b9efaf9b2555f83caf4959ed36ed?q=121.9 KiB21.2 KiB
Transcribe your videos div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/9ca634bcef1782453b11217a9e1800b4?q=119.2 KiB18.6 KiB
Private and secure video div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/fed88000d33d477a27379cb74e8f6dee?q=118.5 KiB18.0 KiB
Shoppable video div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/137db1389102050d9d8645f2f69547a2?q=118.5 KiB17.4 KiB
Video hosting div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/aa45f394ccf57713d88a12c5b80d29f0?q=117.3 KiB16.9 KiB
Video SEO a.flex > div.asset-container > picture.asset-bynder-container > img.progressive-image
/transform/477445fd-bf42-4f22-a93e-3e1cf776c445/Blog-Unlo...16.7 KiB14.4 KiB
Interactive video div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/cbc4096f9b9afb93a6eb2739b3d4be7c?q=114.0 KiB13.1 KiB
Person entering a generative AI prompt on a laptop computer to generate a video… div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/94d8491e5e258a27412eccd689d667db?q=112.1 KiB11.1 KiB
Woman using a laptop computer making a screen recording with an on-screen telep… div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/8c226ef097ee868fea47858f67271fcc?q=111.4 KiB9.8 KiB
Security and compliance at Vimeo div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/136727ee34a4e81f988c2da170b1b690?q=111.7 KiB9.7 KiB
Webinars that work div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/aeab732c986c75044fec3fa337b8d0ee?q=110.1 KiB9.5 KiB
Searchable video library div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/08c5593e9b1e37c87185eafb66c0bd3d?q=19.7 KiB9.5 KiB
Video analytics div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/c6475755631df1d99224c35e2e582911?q=19.6 KiB9.3 KiB
Live streaming, simplified div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/16f49b6551397426490c05b5fab4231a?q=19.0 KiB8.5 KiB
Man using a screen recorder and teleprompter div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/91aba30f8368f1badc48d235aae394b1?q=18.7 KiB8.5 KiB
For teams on the go div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/6c7f0c27d041e64e58cb27552c0c28f7?q=19.8 KiB8.0 KiB
Vimeo AI div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/463a5965c590166432c14bf1aa357c0b?q=16.4 KiB6.3 KiB
Free video creator div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/135d05f1951b9e0f213f82d5076b296e?q=16.5 KiB6.1 KiB
Virtual events div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/8e1a9384c60a8bcfa99a98faee60a540?q=16.5 KiB6.1 KiB
Start your OTT platform now div.no-underline > a.flex > div.asset-image-container > img.progressive-image
i.vimeocdn.com/custom_asset/2ddf61ec944c325c894abd7f61c1e98c?q=15.0 KiB4.2 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: 480 ms
URLTime Spent
player.vimeo.com/480 ms
vimeo.com/features0.0 ms

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

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.

Estimated savings: 40 ms 43.2 KiB
URLTransfer SizeEst Savings
f.vimeocdn.com/cms/_next/static/css/2c22264791d2d245.css56.7 KiB43.2 KiB

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 Evaluation3.4 s
Other1.0 s
Script Parsing & Compilation525 ms
Style & Layout387 ms
Garbage Collection294 ms
Parse HTML & CSS137 ms
Rendering57 ms

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
The page has an unload handler in the main frame.Actionable
Pages with cache-control:no-store header cannot enter back/forward cache.Actionable
Pages with WebSocket cannot enter back/forward cache.Pending browser support
Pages whose main resource has cache-control:no-store cannot enter back/forward cache.Not actionable
Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header.Not actionable
Back/forward cache is disabled because WebSocket has been used.Not actionable

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

Layout shift culprits
Optimize DOM size
Font display
Modern HTTP
Optimize viewport for mobile
Minify CSS
Minify JavaScript
User Timing marks and measures 5 user timings
Avoid long main-thread tasks 20 long tasks found
Image elements have explicit `width` and `height`
Network Requests
Network Round Trip Times 230 ms
Server Backend Latencies 310 ms
Tasks
Diagnostics
Metrics
Screenshot Thumbnails
Final Screenshot
Script Treemap Data
Resources Summary
Initial server response time was short Root document took 340 ms
Avoid large layout shifts 1 layout shift found
INP breakdown
Avoid non-composited animations
86

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

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
Hosting and player Video player Completely customizable Video hosting Ad-free, … div.page > div.builder-blocks > div.builder-f96617c97c2e44bda514b8a282c1a380 > div#global-nav-2025-measurements

Using ARIA attributes in roles where they are prohibited can mean that important information is not communicated to users of assistive technologies. Learn more about prohibited ARIA roles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
AI assistant body.__variable_8cc651 > q-focus-sentinel > div
After AI assistant body.__variable_8cc651 > q-focus-sentinel > div
AI assistant, start div#qualified-multimodal-host > div
AI assistant, end div#qualified-multimodal-host > div

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

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Get started for free div.container-inner > div.w-full > div.flex > h4.text-display-mobile-6

These are opportunities to improve keyboard navigation in your application.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Pricing div.w-full > div.flex > div.flex > a.button-v3-minimal
Contact Sales div.w-full > div.flex > div.flex > a.button-v3-minimal
Watch Demos div.w-full > div.flex > div.flex > a.button-v3-minimal

One main landmark helps screen reader users navigate a web page. Learn more about landmarks.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html html

These items highlight common accessibility best practices.

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
Features div.flex > ul.flex > li.nav-parent-dropdown-container > button.nav-parent-dropdown
Use cases div.flex > ul.flex > li.nav-parent-dropdown-container > button.nav-parent-dropdown
Enterprise div.flex > ul.flex > li.nav-parent-dropdown-container > button.nav-parent-dropdown
Learn div.flex > ul.flex > li.nav-parent-dropdown-container > button.nav-parent-dropdown
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]`s are contained by their required parent element
`[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
Background and foreground colors have a sufficient contrast ratio
Document has a `<title>` element
`<frame>` or `<iframe>` elements have a title
`<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
Deprecated ARIA roles were not used
ARIA IDs are unique
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
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
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
No form fields have multiple labels
`<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
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.
Image elements do not have `[alt]` attributes that are redundant text.
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.
77

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
Unload event listeners are deprecated and will be removed.

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
Failed to load resource: the server responded with a status of 400 (Bad Request)

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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 issues in the `Issues` panel in Chrome Devtools
Ensure CSP is effective against XSS attacks
Ensure proper origin isolation with COOP
Mitigate DOM-based XSS with Trusted Types
Detected JavaScript libraries
Redirects HTTP traffic to HTTPS
Use a strong HSTS policy
Mitigate clickjacking with XFO or CSP
100

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Structured data is valid
Page isn’t blocked from indexing
Document has a `<title>` element
Document has a meta description
Page has successful HTTP status code
Links have descriptive text
Links are crawlable
robots.txt is valid
Image elements have `[alt]` attributes
Document has a valid `hreflang`
Document has a valid `rel=canonical`

Send Feedback