Skip to content
https://coe.int

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.

46

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.coe.int/o/coe-2014-theme/fonts/OpenSans-ExtraBold.ttf14400.0 s127.3 KiB
www.coe.int/o/coe-2014-theme/fonts/OpenSans-Medium.ttf14400.0 s127.1 KiB
www.coe.int/o/coe-2014-theme/fonts/OpenSans-Light.ttf14400.0 s127.0 KiB
www.coe.int/o/coe-2014-theme/fonts/OpenSans-SemiBold.ttf14400.0 s127.0 KiB
www.coe.int/o/coe-2014-theme/fonts/OpenSans-Bold.ttf14400.0 s126.9 KiB
www.coe.int/o/coe-2014-theme/fonts/OpenSans-Regular.ttf14400.0 s126.9 KiB
static.coe.int/pics/icons/institutions/pace.svg0.0 ms27.4 KiB
static.coe.int/pics/icons/institutions/cdh.svg0.0 ms25.9 KiB
www.coe.int/o/coe-2014-theme/font/fontawesome-alloy.woff14400.0 s37.4 KiB
coe.piwik.pro/ppas.js21600.0 s26.0 KiB
static.coe.int/pics/icons/institutions/congress.svg0.0 ms15.4 KiB
static.coe.int/pics/logos/print/logo-coe.svg0.0 ms13.4 KiB
static.coe.int/pics/logos/desktop/portal-en.svg0.0 ms13.0 KiB
static.coe.int/pics/logos/desktop/logo-coe.svg0.0 ms11.5 KiB
www.coe.int/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?14400.0 s12.3 KiB
static.coe.int/pics/icons/institutions/com.svg0.0 ms2.6 KiB
static.coe.int/pics/icons/institutions/cm.svg0.0 ms2.2 KiB
static.coe.int/pics/icons/2014/global/instagram-follow.svg0.0 ms2.0 KiB
static.coe.int/pics/icons/2014/global/linkedin-follow.svg0.0 ms1.8 KiB
static.coe.int/pics/icons/2014/concrete-grey/bookmark.svg0.0 ms1.5 KiB
static.coe.int/pics/icons/2014/concrete-grey/speech-2.svg0.0 ms1.4 KiB
static.coe.int/pics/icons/institutions/oing.svg0.0 ms1.4 KiB
static.coe.int/pics/icons/2014/concrete-grey/identity.svg0.0 ms1.3 KiB
static.coe.int/pics/icons/2014/concrete-grey/map-1.svg0.0 ms1.3 KiB
static.coe.int/pics/icons/2014/video-icon.svg0.0 ms1.3 KiB
static.coe.int/pics/icons/2014/concrete-grey/mail-1.svg0.0 ms1.3 KiB
static.coe.int/pics/icons/particular/icon-protection.svg0.0 ms1.2 KiB
static.coe.int/pics/icons/2014/blue-corporate/book.svg0.0 ms1.2 KiB
static.coe.int/pics/icons/2014/white/next-2.svg0.0 ms1.2 KiB
static.coe.int/pics/icons/2014/global/facebook-follow.svg0.0 ms1.0 KiB
static.coe.int/pics/icons/2014/concrete-grey/rss-1.svg0.0 ms1.0 KiB
static.coe.int/pics/icons/2014/global/youtube-follow.svg0.0 ms1.0 KiB
static.coe.int/pics/icons/2014/global/bluesky-follow.svg0.0 ms984 B
static.coe.int/pics/icons/2014/global/twitter-follow.svg0.0 ms759 B
static.coe.int/pics/icons/2014/global/flickr-follow.svg0.0 ms743 B
www.coe.int/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js2865.0 s781 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:0.7119899999999999] map[node:map[boundingRect:map[bottom:760 height:427 left:-2223 right:-1053 top:333 width:1170] lhId:page-23-LI nodeLabel:Secretary General urges parliamentarians to advance democracy and to continue t… path:1,HTML,1,BODY,1,DIV,4,SECTION,0,DIV,4,DIV,0,DIV,0,DIV,0,DIV,1,DIV,1,SECTION,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,UL,1,LI selector:div.slider-text-right > div.flex-viewport > ul.slides > li snippet:<li class="" data-thumb-alt="" style="width: 1170px; margin-right: 0px; float: left; display: block;"> type:node] score:0.524326 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:760 height:427 left:-3401 right:-2640 top:333 width:760] lhId:page-28-IMG nodeLabel:Petra Bayr on global crises: “The world’s hope lies with Europe” path:1,HTML,1,BODY,1,DIV,4,SECTION,0,DIV,4,DIV,0,DIV,0,DIV,0,DIV,1,DIV,1,SECTION,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,UL,0,LI,0,DIV,0,A,0,IMG selector:li.clone > div.image-wrapper > a > img snippet:<img alt="Petra Bayr on global crises: “The world’s hope lies with Europe”" src="/documents/16695/0/0/247847e4-47ec-b845-48f6-d382ab6d01a3" draggable="false" style="min-height: 100%;"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:760 height:427 left:-2223 right:-1053 top:333 width:1170] lhId:page-23-LI nodeLabel:Secretary General urges parliamentarians to advance democracy and to continue t… path:1,HTML,1,BODY,1,DIV,4,SECTION,0,DIV,4,DIV,0,DIV,0,DIV,0,DIV,1,DIV,1,SECTION,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,UL,1,LI selector:div.slider-text-right > div.flex-viewport > ul.slides > li snippet:<li class="" data-thumb-alt="" style="width: 1170px; margin-right: 0px; float: left; display: block;"> type:node] score:0.186379 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:760 height:427 left:-3401 right:-2640 top:333 width:760] lhId:page-28-IMG nodeLabel:Petra Bayr on global crises: “The world’s hope lies with Europe” path:1,HTML,1,BODY,1,DIV,4,SECTION,0,DIV,4,DIV,0,DIV,0,DIV,0,DIV,1,DIV,1,SECTION,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,UL,0,LI,0,DIV,0,A,0,IMG selector:li.clone > div.image-wrapper > a > img snippet:<img alt="Petra Bayr on global crises: “The world’s hope lies with Europe”" src="/documents/16695/0/0/247847e4-47ec-b845-48f6-d382ab6d01a3" draggable="false" style="min-height: 100%;"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:293 height:175 left:277 right:1073 top:118 width:796] lhId:page-18-DIV nodeLabel:20 - 24 April, Strasbourg Parliamentary Assembly Spring plenary session » Watc… path:1,HTML,1,BODY,1,DIV,4,SECTION,0,DIV,4,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,SECTION,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV selector:div.portlet-content-container > div.portlet-body > div > div.journal-content-article snippet:<div class="journal-content-article " data-analytics-asset-id="35042180" data-analytics-asset-title="Live CTA" data-analytics-asset-type="web-content"> type:node] score:0.001285 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:70 height:64 left:90 right:390 top:6 width:300] lhId:page-27-IMG nodeLabel:Council of Europe path:1,HTML,1,BODY,1,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,A,0,IMG selector:div.d-flex > div#portal-url > a > img snippet:<img alt="Council of Europe" src="https://static.coe.int/pics/logos/desktop/portal-en.svg"> type:node]]] type:subitems]]]

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLEst Savings
www.coe.int/o/coe-2014-theme/fonts/OpenSans-ExtraBold.ttf155 ms
www.coe.int/o/coe-2014-theme/fonts/OpenSans-Bold.ttf155 ms
www.coe.int/o/coe-2014-theme/fonts/OpenSans-Light.ttf155 ms
www.coe.int/o/coe-2014-theme/fonts/OpenSans-Medium.ttf150 ms
www.coe.int/o/coe-2014-theme/fonts/OpenSans-Regular.ttf150 ms
www.coe.int/o/coe-2014-theme/font/fontawesome-alloy.woff150 ms
www.coe.int/o/coe-2014-theme/fonts/OpenSans-SemiBold.ttf80 ms

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:42.064 source:map[column:3264 line:7 type:source-location url:https://static.coe.int/libs/jquery-plugins/jquery.flexslider.min.2.7.2.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:34.989 source:map[column:51844 line:1 type:source-location url:https://www.coe.int/combo?browserId=chrome&minifierType=js&languageId=en_GB&t=1775804592497&/o/frontend-js-jquery-web/jquery/jquery.min.js&/o/frontend-js-jquery-web/jquery/init.js&/o/frontend-js-jquery-web/jquery/ajax.js&/o/frontend-js-jquery-web/jquery/bootstrap.bundle.min.js&/o/frontend-js-jquery-web/jquery/collapsible_search.js&/o/frontend-js-jquery-web/jquery/fm.js&/o/frontend-js-jquery-web/jquery/form.js&/o/frontend-js-jquery-web/jquery/popper.min.js&/o/frontend-js-jquery-web/jquery/side_navigation.js urlProvider:network]] map[reflowTime:4.082 source:map[column:87079 line:1 type:source-location url:https://www.coe.int/combo?browserId=chrome&minifierType=js&languageId=en_GB&t=1775804592497&/o/frontend-js-jquery-web/jquery/jquery.min.js&/o/frontend-js-jquery-web/jquery/init.js&/o/frontend-js-jquery-web/jquery/ajax.js&/o/frontend-js-jquery-web/jquery/bootstrap.bundle.min.js&/o/frontend-js-jquery-web/jquery/collapsible_search.js&/o/frontend-js-jquery-web/jquery/fm.js&/o/frontend-js-jquery-web/jquery/form.js&/o/frontend-js-jquery-web/jquery/popper.min.js&/o/frontend-js-jquery-web/jquery/side_navigation.js urlProvider:network]] map[reflowTime:2.993 source:map[column:85979 line:1 type:source-location url:https://www.coe.int/combo?browserId=chrome&minifierType=js&languageId=en_GB&t=1775804592497&/o/frontend-js-jquery-web/jquery/jquery.min.js&/o/frontend-js-jquery-web/jquery/init.js&/o/frontend-js-jquery-web/jquery/ajax.js&/o/frontend-js-jquery-web/jquery/bootstrap.bundle.min.js&/o/frontend-js-jquery-web/jquery/collapsible_search.js&/o/frontend-js-jquery-web/jquery/fm.js&/o/frontend-js-jquery-web/jquery/form.js&/o/frontend-js-jquery-web/jquery/popper.min.js&/o/frontend-js-jquery-web/jquery/side_navigation.js urlProvider:network]] map[reflowTime:2.262 source:map[column:211 line:101 type:source-location url:https://www.coe.int/combo?browserId=chrome&minifierType=js&languageId=en_GB&t=1775804588649&/o/frontend-js-aui-web/aui/aui/aui.js&/o/frontend-js-aui-web/liferay/modules.js&/o/frontend-js-aui-web/liferay/aui_sandbox.js&/o/frontend-js-aui-web/aui/attribute-base/attribute-base.js&/o/frontend-js-aui-web/aui/attribute-complex/attribute-complex.js&/o/frontend-js-aui-web/aui/attribute-core/attribute-core.js&/o/frontend-js-aui-web/aui/attribute-observable/attribute-observable.js&/o/frontend-js-aui-web/aui/attribute-extras/attribute-extras.js&/o/frontend-js-aui-web/aui/event-custom-base/event-custom-base.js&/o/frontend-js-aui-web/aui/event-custom-complex/event-custom-complex.js&/o/frontend-js-aui-web/aui/oop/oop.js&/o/frontend-js-aui-web/aui/aui-base-lang/aui-base-lang.js&/o/frontend-js-aui-web/liferay/dependency.js&/o/frontend-js-aui-web/liferay/util.js&/o/frontend-js-web/loader/config.js&/o/frontend-js-web/loader/loader.js&/o/frontend-js-web/liferay/dom_task_runner.js&/o/frontend-js-web/liferay/events.js&/o/frontend-js-web/liferay/lazy_load.js&/o/frontend-js-web/liferay/liferay.js&/o/frontend-js-web/liferay/global.bundle.js&/o/frontend-js-web/liferay/portlet.js&/o/frontend-js-web/liferay/workflow.js urlProvider:network]] map[reflowTime:31.793 source:map[column:198810 line:6 type:source-location url:https://coe.containers.piwik.pro/7a8e4f13-52de-496c-9239-96129f02cf08.js urlProvider:network]]]

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
The Council of Europe is accompanying countries in the fight against all forms … div.element > div.image-news > a.mask > img
www.coe.int/documents/16695/0/0/639eeeb3-cabb-760e-79c4-ad12ee01c5ef3.0 MiB3.0 MiB
Contact Group on Belarus div.element > div.image-news > a.mask > img
www.coe.int/documents/16695/0/0/a78d4998-8025-b953-c209-3e7b4980ac281.5 MiB1.5 MiB
London’s Young V&A receives the 2026 Council of Europe Museum prize div.element > div.image-news > a.mask > img
www.coe.int/documents/16695/0/0/dfab1a11-ae56-7a93-6eae-eb79ca099c87448.9 KiB442.5 KiB
Council of Europe Visibility Days An initiative launched to raise awareness of … div.portlet-content-container > div.portlet-body > div > div.journal-content-article
/documents/16695/44731385/coe-story.png/c5305193-57d2-a01...328.8 KiB288.8 KiB
Parliamentary Assembly to hold its spring plenary session in Strasbourg div.element > div.image-news > a.mask > img
www.coe.int/documents/16695/264774656/0/d224f591-93f0-c61a-da84-c17be0e039ef165.7 KiB159.3 KiB
20 - 24 April, Strasbourg Parliamentary Assembly Spring plenary session » Watc… div.portlet-layout > div#column-1 > div#layout-column_column-1 > div#p_p_id_com_liferay_journal_content_web_portlet_JournalContentPortlet_INSTANCE_if2NnbAQNxpD_
/documents/16695/35041425/live-background.jpg/f413adc8-5d...204.4 KiB148.2 KiB
presidency Logo div.box-cs > a > picture > img
/documents/16695/292325509/presidency-MOLDOVA.png/441d931...137.4 KiB136.9 KiB
presidency Logo div.box-cs > a > picture > img
/documents/16695/292325509/presidency-MOLDOVA.png/441d931...137.4 KiB136.9 KiB
Launch of Action Plan for Republic of Moldova 2025-28 div.element > div.image-news > a.mask > img
www.coe.int/documents/16695/276958207/0/c2da62d3-ad9d-baca-1371-4491ab66a92d132.6 KiB125.6 KiB
European Charter for Regional or Minority Languages div.element > div.image-news > a.mask > img
www.coe.int/documents/16695/8628737/0/b0129d08-dc1e-d444-05b8-5a2c8783b67c119.0 KiB112.0 KiB
Rising violence against politicians puts democracy at risk – Parliamentary Asse… div.element > div.image-news > a.mask > img
www.coe.int/documents/16695/0/0/1f479e10-e072-a411-9697-b980c373151a81.6 KiB75.2 KiB
Democratic security, upholding international law and migration on agenda for Al… li > div.image-wrapper > a > img
www.coe.int/documents/16695/0/0/53d876e8-88b0-a71c-627d-a1be3fc59dd9110.8 KiB41.5 KiB
Video to mark Council of Europe 75th Anniversary div.element > div.image-news > a.mask > img
www.coe.int/documents/16695/0/0/59aec8e3-393c-9ca3-97f4-14474f5e317836.6 KiB29.8 KiB
TOWARDS A NEW DEMOCRATIC PACT FOR EUROPE Secretary General's 2025 report Read … div.portlet-content-container > div.portlet-body > div > div.journal-content-article
/documents/16695/44731385/CTA-SG-repor-2025-EN.jpg/5d72f9...63.4 KiB23.4 KiB
section#wrapper > div#content > div#share-widget > a.share-mail section#wrapper > div#content > div#share-widget > a.share-mail
static.coe.int/pics/theme/coe-2014/share/icon-mail-rounded.png15.4 KiB15.3 KiB
section#wrapper > div#content > div#share-widget > a.share-linkedin section#wrapper > div#content > div#share-widget > a.share-linkedin
static.coe.int/pics/theme/coe-2014/share/icon-linkedin-rounded.png15.4 KiB15.3 KiB
div.content > p > picture > img div.content > p > picture > img
/documents/16695/37221310/Focus-ECHR-How.jpg/94ea4a1d-72b...32.0 KiB7.2 KiB
div.content > p > picture > img div.content > p > picture > img
/documents/16695/37221310/Focus-ECHR-How.jpg/94ea4a1d-72b...32.0 KiB7.2 KiB
Petra Bayr on global crises: “The world’s hope lies with Europe” li > div.image-wrapper > a > img
www.coe.int/documents/16695/0/0/247847e4-47ec-b845-48f6-d382ab6d01a375.2 KiB6.0 KiB
Petra Bayr on global crises: “The world’s hope lies with Europe” li > div.image-wrapper > a > img
www.coe.int/documents/16695/0/0/247847e4-47ec-b845-48f6-d382ab6d01a375.2 KiB6.0 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-17-IMG
nodeLabel: Secretary General urges parliamentarians to advance democracy and to continue t…
path: 1,HTML,1,BODY,1,DIV,4,SECTION,0,DIV,4,DIV,0,DIV,0,DIV,0,DIV,1,DIV,1,SECTION,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,UL,1,LI,0,DIV,0,A,0,IMG
selector: li > div.image-wrapper > a > img
snippet: <img alt="Secretary General urges parliamentarians to advance democracy and to conti…" src="/documents/16695/0/0/7c102dc9-bd2f-a5a2-2203-ebf65eaafabd" draggable="false" style="min-height: 100%;">

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
value: no origins were preconnected
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates
value: No additional origins are good candidates for preconnecting

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
/combo?browserId=chrome&minifierType=js&languageId=en_GB&...101.6 KiB120 ms
/combo?browserId=chrome&minifierType=js&languageId=en_GB&...68.0 KiB
www.coe.int/o/js_bundle_config?t=17758046027272.7 KiB
www.coe.int/o/js_loader_config?t=1775804592345295 B
static.coe.int/css/coe-2014-theme/hotfix.dxp.css?t=17767991977613.4 KiB223 ms
/combo?browserId=chrome&minifierType=&themeId=coe2014_WAR...3.6 KiB
/o/coe-2014-theme/css/clay.css?browserId=chrome&themeId=c...68.8 KiB120 ms
/o/coe-2014-theme/css/main.css?browserId=chrome&themeId=c...56.3 KiB120 ms
www.coe.int/o/frontend-js-svg4everybody-web/index.js1.6 KiB
/o/frontend-css-web/main.css?browserId=chrome&themeId=coe...18.8 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: 548 ms
URLTime Spent
coe.int/259 ms
www.coe.int/249 ms
www.coe.int/web/portal/home40 ms
www.coe.int/en/web/portal/home0.0 ms

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
Secretary General urges parliamentarians to advance democracy and to continue t… div.slider-text-right > div.flex-viewport > ul.slides > li
0.524
Secretary General urges parliamentarians to advance democracy and to continue t… div.slider-text-right > div.flex-viewport > ul.slides > li
0.186
20 - 24 April, Strasbourg Parliamentary Assembly Spring plenary session » Watc… div.portlet-content-container > div.portlet-body > div > div.journal-content-article
0.001

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

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: 120 ms 139.8 KiB
URLTransfer SizeEst Savings
/o/coe-2014-theme/css/clay.css?browserId=chrome&themeId=c...68.8 KiB68.0 KiB
/o/coe-2014-theme/css/main.css?browserId=chrome&themeId=c...56.2 KiB53.2 KiB
/o/frontend-css-web/main.css?browserId=chrome&themeId=coe...18.6 KiB18.6 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 120 ms 140.3 KiB
URLTransfer SizeEst Savings
/combo?browserId=chrome&minifierType=js&languageId=en_GB&...67.8 KiB44.1 KiB
/combo?browserId=chrome&minifierType=js&languageId=en_GB&...101.5 KiB43.2 KiB
coe.containers.piwik.pro/7a8e4f13-52de-496c-9239-96129f02cf08.js72.7 KiB29.0 KiB
/combo/?browserId=chrome&minifierType=&languageId=en_GB&t...46.4 KiB24.1 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
Other968 ms
Script Evaluation631 ms
Style & Layout339 ms
Parse HTML & CSS89 ms
Script Parsing & Compilation85 ms
Rendering57 ms
Garbage Collection4.8 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
Pages with cache-control:no-store header cannot enter back/forward cache.Actionable
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

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
www.coe.int/documents/16695/0/0/639eeeb3-cabb-760e-79c4-ad12ee01c5ef3.0 MiB
www.coe.int/documents/16695/0/0/a78d4998-8025-b953-c209-3e7b4980ac281.5 MiB
www.coe.int/documents/16695/0/0/dfab1a11-ae56-7a93-6eae-eb79ca099c87449.6 KiB
/documents/16695/44731385/coe-story.png/c5305193-57d2-a01...329.4 KiB
/documents/16695/35041425/live-background.jpg/f413adc8-5d...204.8 KiB
www.coe.int/documents/16695/264774656/0/d224f591-93f0-c61a-da84-c17be0e039ef166.1 KiB
www.coe.int/en/web/portal/home150.6 KiB
/documents/16695/292325509/presidency-MOLDOVA.png/441d931...137.7 KiB
/documents/16695/292325509/presidency-MOLDOVA.png/441d931...137.7 KiB
www.coe.int/documents/16695/276958207/0/c2da62d3-ad9d-baca-1371-4491ab66a92d132.9 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
The Council of Europe is accompanying countries in the fight against all forms … div.element > div.image-news > a.mask > img
www.coe.int/documents/16695/0/0/639eeeb3-cabb-760e-79c4-ad12ee01c5ef
Contact Group on Belarus div.element > div.image-news > a.mask > img
www.coe.int/documents/16695/0/0/a78d4998-8025-b953-c209-3e7b4980ac28
London’s Young V&A receives the 2026 Council of Europe Museum prize div.element > div.image-news > a.mask > img
www.coe.int/documents/16695/0/0/dfab1a11-ae56-7a93-6eae-eb79ca099c87
Petra Bayr on global crises: “The world’s hope lies with Europe” li.clone > div.image-wrapper > a > img
www.coe.int/documents/16695/0/0/247847e4-47ec-b845-48f6-d382ab6d01a3
Secretary General urges parliamentarians to advance democracy and to continue t… li > div.image-wrapper > a > img
www.coe.int/documents/16695/0/0/7c102dc9-bd2f-a5a2-2203-ebf65eaafabd
Democratic security, upholding international law and migration on agenda for Al… li.flex-active-slide > div.image-wrapper > a > img
www.coe.int/documents/16695/0/0/53d876e8-88b0-a71c-627d-a1be3fc59dd9
Jean-Noël Barrot: force is gaining ground over the rule of law li > div.image-wrapper > a > img
www.coe.int/documents/16695/0/0/01cce8ff-5eb1-7d34-11c5-ee1fab7bac54
Petra Bayr on global crises: “The world’s hope lies with Europe” li > div.image-wrapper > a > img
www.coe.int/documents/16695/0/0/247847e4-47ec-b845-48f6-d382ab6d01a3
Secretary General urges parliamentarians to advance democracy and to continue t… li.clone > div.image-wrapper > a > img
www.coe.int/documents/16695/0/0/7c102dc9-bd2f-a5a2-2203-ebf65eaafabd
Rising violence against politicians puts democracy at risk – Parliamentary Asse… div.element > div.image-news > a.mask > img
www.coe.int/documents/16695/0/0/1f479e10-e072-a411-9697-b980c373151a
Parliamentary Assembly to hold its spring plenary session in Strasbourg div.element > div.image-news > a.mask > img
www.coe.int/documents/16695/264774656/0/d224f591-93f0-c61a-da84-c17be0e039ef
Launch of Action Plan for Republic of Moldova 2025-28 div.element > div.image-news > a.mask > img
www.coe.int/documents/16695/276958207/0/c2da62d3-ad9d-baca-1371-4491ab66a92d
European Charter for Regional or Minority Languages div.element > div.image-news > a.mask > img
www.coe.int/documents/16695/8628737/0/b0129d08-dc1e-d444-05b8-5a2c8783b67c
Video to mark Council of Europe 75th Anniversary div.element > div.image-news > a.mask > img
www.coe.int/documents/16695/0/0/59aec8e3-393c-9ca3-97f4-14474f5e3178
div.content > p > a > img div.content > p > a > img
div.content > p > picture > img div.content > p > picture > img
/documents/16695/37221310/Focus-ECHR-How.jpg/94ea4a1d-72b...
Council of Europe div.d-flex > div#portal-url > a > img
static.coe.int/pics/logos/desktop/portal-en.svg
logo Council of Europe div.row > div.col-sm-6 > div.ctn-logo > img
static.coe.int/pics/logos/desktop/logo-coe.svg
Committee of Ministers div.box-institution > div.elmt-institution > a > img.image
static.coe.int/pics/icons/institutions/cm.svg
Parliamentary Assembly div.box-institution > div.elmt-institution > a > img.image
static.coe.int/pics/icons/institutions/pace.svg
Congress of Local and Regional Authorities div.box-institution > div.elmt-institution > a > img.image
static.coe.int/pics/icons/institutions/congress.svg
European Court of Human Rights div.box-institution > div.elmt-institution > a > img.image
static.coe.int/pics/icons/institutions/cdh.svg
Commissioner for Human Rights div.box-institution > div.elmt-institution > a > img.image
static.coe.int/pics/icons/institutions/com.svg
Conference of INGOs div.box-institution > div.elmt-institution > a > img.image
static.coe.int/pics/icons/institutions/oing.svg
icon sheld div.ctn-official > a.safe > span.icon > img
static.coe.int/pics/icons/particular/icon-protection.svg
ul > li > a > img.picto ul > li > a > img.picto
static.coe.int/pics/theme/coe-2014/footer/icon-bluesky.png
ul > li > a > img.picto ul > li > a > img.picto
static.coe.int/pics/theme/coe-2014/footer/icon-twitter.png
ul > li > a > img.picto ul > li > a > img.picto
static.coe.int/pics/theme/coe-2014/footer/icon-linkedin.png
ul > li > a > img.picto ul > li > a > img.picto
static.coe.int/pics/theme/coe-2014/footer/icon-instagram.png
ul > li > a > img.picto ul > li > a > img.picto
static.coe.int/pics/theme/coe-2014/footer/icon-facebook.png
ul > li > a > img.picto ul > li > a > img.picto
static.coe.int/pics/theme/coe-2014/footer/icon-youtube.png
ul > li > a > img.picto ul > li > a > img.picto
static.coe.int/pics/theme/coe-2014/footer/icon-flickr.png
ul > li > a > img.picto ul > li > a > img.picto
static.coe.int/pics/theme/coe-2014/footer/icon-podcast.png

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

●Max Potential First Input Delay 100 ms
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●JavaScript execution time 0.6 s
●Avoid long main-thread tasks 4 long tasks found
●Network Requests
●Network Round Trip Times 20 ms
●Server Backend Latencies 50 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 250 ms
○INP breakdown
○User Timing marks and measures
○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.

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
Portal ol.breadcrumb > li.first > a > span
Home nav#_com_liferay_site_navigation_breadcrumb_web_portlet_SiteNavigationBreadcrumbPortlet_INSTANCE_portalbreadcrumb_breadcrumbs-defaultScreen > ol.breadcrumb > li.last > span
Rising violence against politicians puts democracy at risk – Parliamentary Asse… div.compact-block > div.element > h3 > a
London’s Young V&A receives the 2026 Council of Europe Museum prize div.compact-block > div.element > h3 > a
The Council of Europe is accompanying countries in the fight against all forms … div.compact-block > div.element > h3 > a
Parliamentary Assembly to hold its spring plenary session in Strasbourg div.compact-block > div.element > h3 > a
View all news » div > div.journal-content-article > div.view-all > a
Find out how the European Convention on Human Rights defends you every day div.content > ul.list1 > li > a
Kazakhstan div.journal-content-article > div.content > p > a
the Republic of Moldova div.journal-content-article > div.content > p > a
Greece div.journal-content-article > div.content > p > a
Netherlands div.journal-content-article > div.content > p > a
Bluesky div.journal-content-article > div.content > p > a
 X (Twitter) div.journal-content-article > div.content > p > a
 LinkedIn div.journal-content-article > div.content > p > a
 Instagram div.journal-content-article > div.content > p > a
 Facebook div.journal-content-article > div.content > p > a
 Youtube div.journal-content-article > div.content > p > a
 Flickr div.journal-content-article > div.content > p > a
 Podcasts div.journal-content-article > div.content > p > a
April 2026 - Meetings of the Committee of Ministers div.title-list > div.element > p > a
Mental Health for All: Awareness, Action and Advocacy – study session in co-ope… div.title-list > div.element > p > a
Youth for Democracy 2026 – study session in co-operation with the Young Europea… div.title-list > div.element > p > a
Spring session of the Parliamentary Assembly (PACE) div.title-list > div.element > p > a
Deputy Secretary General Bjørn Berge will participate in the spring Session of … div.title-list > div.element > p > a
Spring plenary session of the Parliamentary Assembly of the Council of Europe div.title-list > div.element > p > a
Study visit to Strasbourg for youth stakeholders from Moldova div.title-list > div.element > p > a
View all events » div > div.journal-content-article > div.view-all > a
ETS No. 176 div.journal-content-article > div.content > p > a
CETS No. 216 div.content > ul.list1 > li > a
CETS No. 226 div.content > ul.list1 > li > a
ETS No. 176 div.journal-content-article > div.content > p > a
CETS No. 226 div.journal-content-article > div.content > p > a
Treaty Office div > div.journal-content-article > div.view-all > a
Contact Group on Belarus div.compact-block > div.element > h3 > a
Video to mark Council of Europe 75th Anniversary div.compact-block > div.element > h3 > a
Launch of Action Plan for Republic of Moldova 2025-28 div.compact-block > div.element > h3 > a
European Charter for Regional or Minority Languages div.compact-block > div.element > h3 > a
Disclaimer - © Council of Europe 2026 - © Photo credit footer#footer > div#footer-disclaimer > div.text-center > a
Contact footer#footer > div#footer-disclaimer > div.text-center > a
Privacy policy div#ppms_cm_popup > div#ppms_cm_popup_main_id > div#ppms_cm_popup_responsive_wrapper_id > a#popup-link
Accept div#ppms_cm_popup > div#ppms_cm_popup_main_id > div#ppms-124c44a9-52c6-4136-9964-9a6be955271a > button#ppms_cm_agree-to-all
Powered by div#ppms_cm_popup_overlay > div#ppms_cm_popup_wrapper > div#ppms_cm_footer > span#ppms_cm_footer__powered_by

These are opportunities to improve the legibility of your content.

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
20 - 24 April, Strasbourg div > div.journal-content-article > div.content > h4

These are opportunities to improve keyboard navigation in your application.

Names and labels

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
ul > li > a > img.picto ul > li > a > img.picto
ul > li > a > img.picto ul > li > a > img.picto
ul > li > a > img.picto ul > li > a > img.picto
ul > li > a > img.picto ul > li > a > img.picto
ul > li > a > img.picto ul > li > a > img.picto
ul > li > a > img.picto ul > li > a > img.picto
ul > li > a > img.picto ul > li > a > img.picto
ul > li > a > img.picto ul > li > a > img.picto

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.d-flex > div.d-none > div.search > a.min-height div.d-flex > div.d-none > div.search > a.min-height
li.flex-active-slide > div.slide-info > span.portlet-share > a.dropdown-toggle li.flex-active-slide > div.slide-info > span.portlet-share > a.dropdown-toggle
li > div.slide-info > span.portlet-share > a.dropdown-toggle li > div.slide-info > span.portlet-share > a.dropdown-toggle
li > div.slide-info > span.portlet-share > a.dropdown-toggle li > div.slide-info > span.portlet-share > a.dropdown-toggle
li > div.slide-info > span.portlet-share > a.dropdown-toggle li > div.slide-info > span.portlet-share > a.dropdown-toggle
div.compact-block > div.element > span.portlet-share > a.dropdown-toggle div.compact-block > div.element > span.portlet-share > a.dropdown-toggle
div.compact-block > div.element > span.portlet-share > a.dropdown-toggle div.compact-block > div.element > span.portlet-share > a.dropdown-toggle
div.compact-block > div.element > span.portlet-share > a.dropdown-toggle div.compact-block > div.element > span.portlet-share > a.dropdown-toggle
div.compact-block > div.element > span.portlet-share > a.dropdown-toggle div.compact-block > div.element > span.portlet-share > a.dropdown-toggle
div.journal-content-article > div.content > p > a div.journal-content-article > div.content > p > a
div.journal-content-article > div.content > p > a div.journal-content-article > div.content > p > a
div.journal-content-article > div.content > p > a div.journal-content-article > div.content > p > a
div.title-list > div.element > p > a div.title-list > div.element > p > a
div.title-list > div.element > p > a div.title-list > div.element > p > a
div.title-list > div.element > p > a div.title-list > div.element > p > a
div.title-list > div.element > p > a div.title-list > div.element > p > a
div.title-list > div.element > p > a div.title-list > div.element > p > a
div.title-list > div.element > p > a div.title-list > div.element > p > a
div.title-list > div.element > p > a div.title-list > div.element > p > a
div.compact-block > div.element > span.portlet-share > a.dropdown-toggle div.compact-block > div.element > span.portlet-share > a.dropdown-toggle
div.compact-block > div.element > span.portlet-share > a.dropdown-toggle div.compact-block > div.element > span.portlet-share > a.dropdown-toggle
div.compact-block > div.element > span.portlet-share > a.dropdown-toggle div.compact-block > div.element > span.portlet-share > a.dropdown-toggle
div.compact-block > div.element > span.portlet-share > a.dropdown-toggle div.compact-block > div.element > span.portlet-share > a.dropdown-toggle

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.

○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
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●`[accesskey]` values are unique
●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
●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.
●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.
●Skip links are focusable.
●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.
○`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.
○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
○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
SharedStorage
www.coe.int/cdn-cgi/challenge-platform/scripts/jsd/main.js
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.
www.coe.int/cdn-cgi/challenge-platform/scripts/jsd/main.js
Fledge
www.coe.int/cdn-cgi/challenge-platform/scripts/jsd/main.js
●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
83

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.

Link destinationLink Text
www.coe.int/en/web/secretary-general/report-2025Read more
www.coe.int/en/web/coe-storyRead more

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
ul > li > a > img.picto ul > li > a > img.picto
ul > li > a > img.picto ul > li > a > img.picto
ul > li > a > img.picto ul > li > a > img.picto
ul > li > a > img.picto ul > li > a > img.picto
ul > li > a > img.picto ul > li > a > img.picto
ul > li > a > img.picto ul > li > a > img.picto
ul > li > a > img.picto ul > li > a > img.picto
ul > li > a > img.picto ul > li > a > img.picto

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
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`
○robots.txt is valid

Send Feedback