C — https://www.debian.org | BeaverCheck Audit

Site Health

Score: 78 / 100

Based on 8 categories, 0 sections

How is this calculated?

The overall score is a weighted average of individual category scores. Categories with more impact on user experience and security carry more weight.

Performance 25%Security 25%Accessibility 15%SEO 10%Infrastructure 10%Compliance 8%Content 5%Sustainability 2%

Weights reflect general web best practices. Individual needs may differ.

Top Priorities (5)

Content-Security-Policy header is missing

Security › Security Headers

No Content-Security-Policy header found

Security › Content Security Policy

8 link(s) with no accessible text

Accessibility › Link & Button Quality

9 control(s) without accessible label

Accessibility › Form Accessibility

No <main> landmark found

Accessibility › Landmark Structure

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Markdown

[![BeaverCheck](https://beavercheck.com/badge?url=https%3A%2F%2Fwww.debian.org)](https://beavercheck.com/results/35a2994a-2327-8efe-458a-5803af5765ce)

HTML

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Image URL

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Lighthouse Scores

Industry-standard audits powered by Google Lighthouse.

Performance

Accessibility

Best Practices

100

SEO

Core Web Vitals

Key metrics that affect user experience.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.08 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

8.73 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

0 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.000

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

3.68 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

8.73 s

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

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

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

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

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

Request	Cache TTL	Transfer Size
www.debian.org/Pics/debconf25_group_photo.jpg	604800.0 s	508.1 KiB
www.debian.org/Pics/mini-dc25-hamburg.jpg	604800.0 s	431.3 KiB
www.debian.org/Pics/calamares-installer.png	604800.0 s	275.8 KiB
www.debian.org/Pics/debian-funny-people-1024x576.jpg	604800.0 s	214.4 KiB
www.debian.org/Pics/mini-dc25-maceio.jpg	604800.0 s	151.2 KiB
www.debian.org/Pics/debian-swiss-knife-hands-1024x576.jpg	604800.0 s	118.5 KiB
www.debian.org/Pics/ceratopsian-fg.svg	86400.0 s	22.8 KiB
www.debian.org/Pics/debian-logo-1024x576.png	604800.0 s	32.1 KiB
www.debian.org/debian.css	86400.0 s	4.7 KiB
www.debian.org/Pics/users.svg	86400.0 s	3.4 KiB
www.debian.org/Pics/life-ring.svg	86400.0 s	3.1 KiB
www.debian.org/Pics/user-plus.svg	86400.0 s	3.0 KiB
www.debian.org/Pics/trophy.svg	86400.0 s	2.9 KiB
www.debian.org/startpage.css	86400.0 s	2.8 KiB
www.debian.org/Pics/list.svg	86400.0 s	2.6 KiB
www.debian.org/Pics/heartbeat.svg	86400.0 s	2.3 KiB
www.debian.org/Pics/security.svg	86400.0 s	2.1 KiB
www.debian.org/debhome.css	86400.0 s	1.6 KiB
www.debian.org/5img-carousel-slider.css	86400.0 s	1.4 KiB
www.debian.org/Pics/openlogo-50.png	604800.0 s	2.0 KiB
www.debian.org/debian-en.css	86400.0 s	436 B
www.debian.org/empty.css	86400.0 s	69 B

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

	URL	Resource Size	Est Savings
DebConf25 Group Photo `div.slider-wrapper > div.inner > article > img`	www.debian.org/Pics/debconf25_group_photo.jpg	507.7 KiB	496.0 KiB
Group photo of the MiniDebConf Hamburg 2025 `div.slider-wrapper > div.inner > article > img`	www.debian.org/Pics/mini-dc25-hamburg.jpg	431.0 KiB	419.7 KiB
Screenshot from the Calamares installer `div.slider-wrapper > div.inner > article > img`	www.debian.org/Pics/calamares-installer.png	275.5 KiB	263.4 KiB
Debian people at Debconf18 in Hsinchu really having fun `div.slider-wrapper > div.inner > article > img`	www.debian.org/Pics/debian-funny-people-1024x576.jpg	214.2 KiB	202.9 KiB
Group photo of the MiniDebConf Maceió 2025 `div.slider-wrapper > div.inner > article > img`	www.debian.org/Pics/mini-dc25-maceio.jpg	151.1 KiB	139.8 KiB
Debian is like a Swiss Army Knife `div.slider-wrapper > div.inner > article > img`	www.debian.org/Pics/debian-swiss-knife-hands-1024x576.jpg	118.4 KiB	107.1 KiB
Debian `div.column > div > div.os-img-container > img`	www.debian.org/Pics/debian-logo-1024x576.png	32.0 KiB	27.8 KiB

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

lhId: page-0-IMG

nodeLabel: DebConf25 Group Photo

path: 1,HTML,1,BODY,3,SECTION,2,DIV,0,DIV,0,DIV,3,DIV,6,DIV,0,DIV,0,ARTICLE,1,IMG

selector: div.slider-wrapper > div.inner > article > img

snippet: <img src="Pics/debconf25_group_photo.jpg" alt="DebConf25 Group Photo" width="1024" height="598">

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.

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.

URL	Transfer Size	Duration
www.debian.org/debian.css	4.7 KiB	150 ms
www.debian.org/empty.css	69 B
www.debian.org/debian-en.css	436 B
www.debian.org/5img-carousel-slider.css	1.4 KiB
www.debian.org/startpage.css	2.8 KiB
www.debian.org/debhome.css	1.6 KiB

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.

TTI

●Layout shift culprits

●Document request latency

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Max Potential First Input Delay 20 ms

●Minify CSS

●Minify JavaScript

●Reduce unused CSS

●Reduce unused JavaScript

●Avoids enormous network payloads Total size was 1,797 KiB

●JavaScript execution time 0.0 s

●Minimizes main-thread work 0.4 s

●Image elements have explicit `width` and `height`

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 30 ms

●Server Backend Latencies 180 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 40 ms

○INP breakdown

○User Timing marks and measures

○Avoid long main-thread tasks

○Avoid non-composited animations

○Avoid large layout shifts

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.

Failing Elements
div.column > div.row > div.community > a `div.column > div.row > div.community > a`
div.column > div.row > div.community > a `div.column > div.row > div.community > a`
div.column > div.row > div.community > a `div.column > div.row > div.community > a`
div.column > div.row > div.community > a `div.column > div.row > div.community > a`
div.column > div.row > div.community > a `div.column > div.row > div.community > a`
div.column > div.row > div.community > a `div.column > div.row > div.community > a`
div.column > div.row > div.community > a `div.column > div.row > div.community > a`
div.column > div.row > div.community > a `div.column > div.row > div.community > a`

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

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Failing Elements
RSS `div.column > div.project-news > div.project-news-content > a.rss_logo`

These are opportunities to improve the legibility of your content.

Names and labels

Labels ensure that form controls are announced properly by assistive technologies, like screen readers. Learn more about form element labels.

Failing Elements
div#searchbox > form > p > input `div#searchbox > form > p > input`

Form elements without effective labels can create frustrating experiences for screen reader users. Learn more about the `select` element.

Failing Elements
Select your language català dansk Deutsch español français Galego Indonesia Ita… `div#pageLang > div#langSelector > div#langContainer > select`

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.

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.

Failing Elements
Blog `div#navbar > ul > li > a`
Other downloads `div.column > div > div.os-img-container > a.os-other-download`
Select your language català dansk Deutsch español français Galego Indonesia Ita… `div#pageLang > div#langSelector > div#langContainer > select`

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

Failing Elements
html `html`

These items highlight common accessibility best practices.

○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>`

●Image elements have `[alt]` attributes

●Input buttons have discernible text.

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●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.

●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

●`[lang]` attributes have a valid value

●Heading elements appear in a sequentially-descending order

○`[accesskey]` values are unique

○`[aria-*]` attributes match their roles

○`button`, `link`, and `menuitem` elements have accessible names

○ARIA attributes are used as specified for the element's role

○Deprecated ARIA roles were not used

○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 use only permitted ARIA attributes

○`[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

○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

○`[aria-*]` attributes have valid values

○`[aria-*]` attributes are valid and not misspelled

○Buttons have an accessible name

○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 type="image">` elements have `[alt]` text

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Skip links are focusable.

○No element has a `[tabindex]` value greater than 0

○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.

○Uses ARIA roles only on compatible elements

○Image elements do not have `[alt]` attributes that are redundant text.

○Identical links have the same purpose.

○Elements with visible text labels have matching accessible names.

○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.

Best Practices

User Experience

Image natural dimensions should be proportional to the display size and the pixel ratio to maximize image clarity. Learn how to provide responsive images.

	URL	Displayed size	Actual size	Expected size
Debian `div#upperheader > div#logo > a > img`	www.debian.org/Pics/openlogo-50.png	50 x 61	50 x 61	75 x 92

●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

●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

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Mitigate clickjacking with XFO or CSP

○Detected JavaScript libraries

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

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

○robots.txt is valid

○Document has a valid `rel=canonical`

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

Performance

Accessibility

100

Best Practices

100

SEO

Core Web Vitals

Key metrics that affect user experience. — Desktop

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

421 ms

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

1.66 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

0 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.000

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

490 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.66 s

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

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

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

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

Request	Cache TTL	Transfer Size
www.debian.org/Pics/debconf25_group_photo.jpg	604800.0 s	508.1 KiB
www.debian.org/Pics/mini-dc25-hamburg.jpg	604800.0 s	431.3 KiB
www.debian.org/Pics/calamares-installer.png	604800.0 s	275.8 KiB
www.debian.org/Pics/debian-funny-people-1024x576.jpg	604800.0 s	214.4 KiB
www.debian.org/Pics/mini-dc25-maceio.jpg	604800.0 s	151.2 KiB
www.debian.org/Pics/debian-swiss-knife-hands-1024x576.jpg	604800.0 s	118.5 KiB
www.debian.org/Pics/ceratopsian-fg.svg	86400.0 s	22.8 KiB
www.debian.org/Pics/debian-logo-1024x576.png	604800.0 s	32.1 KiB
www.debian.org/debian.css	86400.0 s	4.7 KiB
www.debian.org/Pics/users.svg	86400.0 s	3.4 KiB
www.debian.org/Pics/life-ring.svg	86400.0 s	3.1 KiB
www.debian.org/Pics/user-plus.svg	86400.0 s	3.0 KiB
www.debian.org/Pics/trophy.svg	86400.0 s	2.9 KiB
www.debian.org/startpage.css	86400.0 s	2.8 KiB
www.debian.org/Pics/list.svg	86400.0 s	2.6 KiB
www.debian.org/Pics/heartbeat.svg	86400.0 s	2.3 KiB
www.debian.org/Pics/security.svg	86400.0 s	2.1 KiB
www.debian.org/debhome.css	86400.0 s	1.6 KiB
www.debian.org/5img-carousel-slider.css	86400.0 s	1.4 KiB
www.debian.org/Pics/openlogo-50.png	604800.0 s	2.0 KiB
www.debian.org/debian-en.css	86400.0 s	436 B
www.debian.org/empty.css	86400.0 s	69 B

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

	URL	Resource Size	Est Savings
DebConf25 Group Photo `div.slider-wrapper > div.inner > article > img`	www.debian.org/Pics/debconf25_group_photo.jpg	507.7 KiB	473.3 KiB
Group photo of the MiniDebConf Hamburg 2025 `div.slider-wrapper > div.inner > article > img`	www.debian.org/Pics/mini-dc25-hamburg.jpg	431.0 KiB	397.9 KiB
Screenshot from the Calamares installer `div.slider-wrapper > div.inner > article > img`	www.debian.org/Pics/calamares-installer.png	275.5 KiB	239.9 KiB
Debian people at Debconf18 in Hsinchu really having fun `div.slider-wrapper > div.inner > article > img`	www.debian.org/Pics/debian-funny-people-1024x576.jpg	214.2 KiB	181.1 KiB
Group photo of the MiniDebConf Maceió 2025 `div.slider-wrapper > div.inner > article > img`	www.debian.org/Pics/mini-dc25-maceio.jpg	151.1 KiB	118.0 KiB
Debian is like a Swiss Army Knife `div.slider-wrapper > div.inner > article > img`	www.debian.org/Pics/debian-swiss-knife-hands-1024x576.jpg	118.4 KiB	85.3 KiB
Debian `div.column > div > div.os-img-container > img`	www.debian.org/Pics/debian-logo-1024x576.png	32.0 KiB	19.8 KiB

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

lhId: page-6-IMG

nodeLabel: Debian

path: 1,HTML,1,BODY,3,SECTION,2,DIV,1,DIV,0,DIV,2,DIV,0,IMG

selector: div.column > div > div.os-img-container > img

snippet: <img src="Pics/debian-logo-1024x576.png" alt="Debian" width="1024" height="576">

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.

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.

URL	Transfer Size
www.debian.org/debhome.css	1.6 KiB
www.debian.org/5img-carousel-slider.css	1.4 KiB
www.debian.org/startpage.css	2.8 KiB
www.debian.org/debian-en.css	436 B
www.debian.org/debian.css	4.7 KiB
www.debian.org/empty.css	69 B

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

●Time to Interactive 1.7 s

●Layout shift culprits

●Document request latency

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Max Potential First Input Delay 20 ms

●Minify CSS

●Minify JavaScript

●Reduce unused CSS

●Reduce unused JavaScript

●Avoids enormous network payloads Total size was 1,797 KiB

●JavaScript execution time 0.0 s

●Minimizes main-thread work 0.1 s

●Image elements have explicit `width` and `height`

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 30 ms

●Server Backend Latencies 180 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 40 ms

○INP breakdown

○User Timing marks and measures

○Avoid long main-thread tasks

○Avoid non-composited animations

○Avoid large layout shifts

Accessibility

ARIA

Failing Elements
div.column > div.row > div.community > a `div.column > div.row > div.community > a`
div.column > div.row > div.community > a `div.column > div.row > div.community > a`
div.column > div.row > div.community > a `div.column > div.row > div.community > a`
div.column > div.row > div.community > a `div.column > div.row > div.community > a`
div.column > div.row > div.community > a `div.column > div.row > div.community > a`
div.column > div.row > div.community > a `div.column > div.row > div.community > a`
div.column > div.row > div.community > a `div.column > div.row > div.community > a`
div.column > div.row > div.community > a `div.column > div.row > div.community > a`

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

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Failing Elements
RSS `div.column > div.project-news > div.project-news-content > a.rss_logo`

These are opportunities to improve the legibility of your content.

Names and labels

Labels ensure that form controls are announced properly by assistive technologies, like screen readers. Learn more about form element labels.

Failing Elements
div#searchbox > form > p > input `div#searchbox > form > p > input`

Form elements without effective labels can create frustrating experiences for screen reader users. Learn more about the `select` element.

Failing Elements
Select your language català dansk Deutsch español français Galego Indonesia Ita… `div#pageLang > div#langSelector > div#langContainer > select`

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.

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.

Failing Elements
Select your language català dansk Deutsch español français Galego Indonesia Ita… `div#pageLang > div#langSelector > div#langContainer > select`

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

Failing Elements
html `html`

These items highlight common accessibility best practices.

○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>`

●Image elements have `[alt]` attributes

●Input buttons have discernible text.

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●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.

●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

●`[lang]` attributes have a valid value

●Heading elements appear in a sequentially-descending order

○`[accesskey]` values are unique

○`[aria-*]` attributes match their roles

○`button`, `link`, and `menuitem` elements have accessible names

○ARIA attributes are used as specified for the element's role

○Deprecated ARIA roles were not used

○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 use only permitted ARIA attributes

○`[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

○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

○`[aria-*]` attributes have valid values

○`[aria-*]` attributes are valid and not misspelled

○Buttons have an accessible name

○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 type="image">` elements have `[alt]` text

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Skip links are focusable.

○No element has a `[tabindex]` value greater than 0

○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.

○Uses ARIA roles only on compatible elements

○Image elements do not have `[alt]` attributes that are redundant text.

○Identical links have the same purpose.

○Elements with visible text labels have matching accessible names.

○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.

○`<td>` elements in a large `<table>` have one or more table headers.

100

Best Practices

●Uses HTTPS

●Avoids deprecated APIs

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●Displays images with correct aspect ratio

●Serves images with appropriate resolution

●Page has the HTML doctype

●Properly defines charset

●No browser errors logged to the console

●No issues in the `Issues` panel in Chrome Devtools

●Ensure CSP is effective against XSS attacks

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Mitigate clickjacking with XFO or CSP

○Detected JavaScript libraries

100

SEO

○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

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

○robots.txt is valid

○Document has a valid `rel=canonical`

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Site Health

Top Priorities (5)

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Accessibility

ARIA

Contrast

Names and labels

Best practices

Best Practices

User Experience

SEO

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Accessibility

ARIA

Contrast

Names and labels

Best practices

Best Practices

SEO

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