Lighthouse Mobile

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

SCORE

GRADE

FIX

REVIEW

PASS

INFO

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.

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.

Request	Cache TTL	Transfer Size
www.itu.int/js/jquery-ui-1.8.16.min.js	86400.0 s	198.2 KiB
www.itu.int/js/jquery-1.6.4.min.js	86400.0 s	90.6 KiB
www.itu.int/js/itu-functions.js	86400.0 s	69.2 KiB
/ScriptResource.axd?d=u0dJMJBkSP4O90WEXjB8tUsWcB4BkV1jcwe...	0.0 ms	25.6 KiB
www.itu.int/en/PublishingImages/slider/2026/WTPF-26-registration-slider.jpg	86400.0 s	53.5 KiB
www.itu.int/en/PublishingImages/slider/2026/GICT26-Visual-slider.jpg	86400.0 s	42.3 KiB
/en/PublishingImages/slider/2026/AmateurRadio_AdobeStock_...	86400.0 s	41.7 KiB
www.google-analytics.com/analytics.js	7200.0 s	20.9 KiB
www.itu.int/PublishingImages/masterpage/buttons/ITU-Buttons.png	86400.0 s	33.0 KiB
/ScriptResource.axd?d=FQlq4QX5WsTXFIgYiWTenUSIA9WRG0BOpnj...	0.0 ms	10.3 KiB
www.itu.int/Style%20Library/itu-main.css	86400.0 s	25.6 KiB
/en/PublishingImages/homepage-indepth/2026/itu-journal-un...	86400.0 s	23.9 KiB
www.itu.int/PublishingImages/masterpage/background/background-sprite.png	86400.0 s	21.2 KiB
static.hotjar.com/c/hotjar-768571.js?sv=6	60.0 s	8.2 KiB
/en/PublishingImages/homepage-news-views/2026/AmateurRadi...	86400.0 s	19.1 KiB
/en/PublishingImages/homepage-indepth/2025/facts-and-figu...	86400.0 s	17.2 KiB
/en/PublishingImages/homepage-news-views/2026/bdt-highlig...	86400.0 s	16.3 KiB
/en/PublishingImages/homepage-top-corner-logo/2026/pp26-l...	86400.0 s	16.3 KiB
/WebResource.axd?d=fZBssSwBZyrTlT7jnnYJc7xzrAjctNoxqGfV-Q...	0.0 ms	6.5 KiB
www.itu.int/en/PublishingImages/homepage-4th-row-box/2026/pp26-4th-row.jpg	86400.0 s	12.0 KiB
www.itu.int/en/PublishingImages/slider/2026/artemis-video-slider.jpg	86400.0 s	11.9 KiB
www.itu.int/en/PublishingImages/home/footer-secretary-general.png	86400.0 s	11.3 KiB
/en/PublishingImages/homepage-news-views/2026/podcast-dig...	86400.0 s	10.3 KiB
www.itu.int/PublishingImages/masterpage/background/ITU-subnav-new2.png	86400.0 s	10.2 KiB
www.itu.int/en/PublishingImages/homepage-4th-row-box/2026/wtisd26-4th-row.jpg	86400.0 s	9.6 KiB
cse.google.com/cse.js?cx=603416e14d8fe4ef6	0.0 ms	3.8 KiB
/en/PublishingImages/homepage-indepth/2026/AI-publication...	86400.0 s	8.8 KiB
www.itu.int/en/PublishingImages/homepage-4th-row-box/2026/wtpf26-4th-row.jpg	86400.0 s	7.3 KiB
/en/PublishingImages/slider/2026/AmateurRadio_AdobeStock_...	86400.0 s	5.7 KiB
www.itu.int/en/PublishingImages/slider/2026/WTPF-26-registration-slider1.jpg	86400.0 s	4.9 KiB
www.itu.int/en/PublishingImages/slider/2026/GICT26-Visual-slider2.jpg	86400.0 s	4.4 KiB
www.itu.int/Style%20Library/itu-base.css	86400.0 s	3.7 KiB
www.itu.int/PublishingImages/masterpage/background/rounded-grey-300.png	86400.0 s	3.1 KiB
www.itu.int/Style%20Library/ITU-Flexlistviewer.css	86400.0 s	2.7 KiB
www.google.com/cse/static/style/look/v6/default.css	3000.0 s	1.2 KiB
www.itu.int/PublishingImages/masterpage/buttons/joinitu-login-bg.png	86400.0 s	2.4 KiB
www.itu.int/PublishingImages/masterpage/background/body-top-bg-219x10.png	86400.0 s	2.4 KiB
www.itu.int/js/itu-own-functions.js	86400.0 s	2.3 KiB
static.addtoany.com/menu/page.js	86400.0 s	2.2 KiB
www.itu.int/en/PublishingImages/slider/2026/artemis-video-slider1.jpg	86400.0 s	2.1 KiB
www.itu.int/PublishingImages/masterpage/buttons/main-nav-bg.gif	86400.0 s	1.7 KiB
www.itu.int/PublishingImages/masterpage/icons/home-feature-active.png	86400.0 s	1.7 KiB
www.itu.int/Style%20Library/ms-rteCustom-ITUv6.css	86400.0 s	1.7 KiB
www.itu.int/PublishingImages/masterpage/buttons/linkedin-round.png	86400.0 s	1.6 KiB
www.itu.int/PublishingImages/masterpage/icons/large-blue-arrow.png	86400.0 s	1.6 KiB
www.itu.int/PublishingImages/masterpage/buttons/twitter-round.png	86400.0 s	1.6 KiB
www.itu.int/PublishingImages/masterpage/buttons/email-round.png	86400.0 s	1.5 KiB
www.itu.int/PublishingImages/masterpage/buttons/facebook-round.png	86400.0 s	1.5 KiB
/WebResource.axd?d=Ijg8dHGzYcEK7ifHOUDiwpxSHi6bCuFBNS5BJb...	0.0 ms	597 B
www.itu.int/PublishingImages/masterpage/icons/home.png	86400.0 s	1.3 KiB
www.itu.int/PublishingImages/masterpage/icons/more-arrow.png	86400.0 s	1.2 KiB
www.itu.int/PublishingImages/masterpage/icons/quicklinks-arrow.gif	86400.0 s	1.1 KiB
static.hotjar.com/c/hotjar-2692144.js?sv=7	60.0 s	431 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.

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.

URL	Est Savings
www.itu.int/fonts/DroidSerif-Regular-webfont.woff	490 ms
www.itu.int/fonts/DroidSans-Bold-webfont.woff	265 ms
script.hotjar.com/Roboto-Medium.ef8bb0.woff2	10 ms
script.hotjar.com/Roboto-Regular.422781.woff2	10 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:21.688 source:map[column:209733 line:1 type:source-location url:https://www.itu.int/_layouts/15/init.js?rev=TzY%2Fm%2FOoPnHW9OQ41OjrYQ%3D%3DTAG0 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:32.165 source:map[column:4126 line:3 type:source-location url:https://www.itu.int/js/jquery-1.6.4.min.js urlProvider:network]] map[reflowTime:0.416 source:map[column:231 line:15 type:source-location url:https://www.itu.int/js/jquery-ui-1.8.16.min.js urlProvider:network]] map[reflowTime:0.782 source:map[column:5139 line:3 type:source-location url:https://www.itu.int/js/jquery-1.6.4.min.js urlProvider:network]] map[reflowTime:2.813 source:map[column:2711 line:1 type:source-location url:https://www.itu.int/js/jquery-1.6.4.min.js urlProvider:network]] map[reflowTime:2.625 source:map[column:2725 line:1 type:source-location url:https://www.itu.int/js/jquery-1.6.4.min.js urlProvider:network]] map[reflowTime:7.313 source:map[type:text value:[unattributed]]] map[reflowTime:0.209 source:map[column:76190 line:3 type:source-location url:https://script.hotjar.com/modules.6a0f3932cb1341a35c18.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.

	URL	Resource Size	Est Savings
amateur radio `div.home-feature-item > div.hf-photo > a > img`	/en/PublishingImages/slider/2026/AmateurRadio_AdobeStock_...	40.7 KiB	16.9 KiB
ITU Journal `dt.flexviewerMainDivDT-indepth > div.flexviewerMainDivDT-image-indepth > a > img`	/en/PublishingImages/homepage-indepth/2026/itu-journal-un...	22.8 KiB	14.8 KiB
PP 26 `div.col-10 > div > a > img`	/en/PublishingImages/homepage-top-corner-logo/2026/pp26-l...	15.3 KiB	12.6 KiB
Handbook Amateur Satellite service `dt.flexviewerMainDivDT-newsviews > div.flexviewerMainDivDT-image-newsviews > a > img`	/en/PublishingImages/homepage-news-views/2026/AmateurRadi...	18.1 KiB	10.1 KiB
Facts and figures report 2025 `dt.flexviewerMainDivDT-indepth > div.flexviewerMainDivDT-image-indepth > a > img`	/en/PublishingImages/homepage-indepth/2025/facts-and-figu...	16.1 KiB	8.1 KiB
BDT highlights `dt.flexviewerMainDivDT-newsviews > div.flexviewerMainDivDT-image-newsviews > a > img`	/en/PublishingImages/homepage-news-views/2026/bdt-highlig...	15.3 KiB	7.3 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]

items: [map[duration:3097.514000244141 label:Time to first byte subpart:timeToFirstByte] map[duration:1878.4869997558594 label:Resource load delay subpart:resourceLoadDelay] map[duration:577.269 label:Resource load duration subpart:resourceLoadDuration] map[duration:484.07 label:Element render delay subpart:elementRenderDelay]]

lhId: page-6-DIV

nodeLabel: Artemis II: Spectrum and ITU coding Artemis II relies on spectrum protection…

path: 3,HTML,8,BODY,10,FORM,16,DIV,0,DIV,3,DIV,2,DIV,2,DIV,11,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV

selector: div.ms-webpart-chrome > div#WebPartctl00_SPWebPartManager1_g_246d1cec_ad62_4fc5_970c_5ee7a187f08b > div#ctl00_SPWebPartManager1_g_246d1cec_ad62_4fc5_970c_5ee7a187f08b > div.home-feature-wrap

snippet: <div class="home-feature-wrap">

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-6-DIV

nodeLabel: Artemis II: Spectrum and ITU coding Artemis II relies on spectrum protection…

path: 3,HTML,8,BODY,10,FORM,16,DIV,0,DIV,3,DIV,2,DIV,2,DIV,11,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV

snippet: <div class="home-feature-wrap">

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.

title: Preconnected origins

value: no origins were preconnected

description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.

title: Preconnect candidates

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size	Duration
www.itu.int/js/jquery-ui-1.8.16.min.js	198.2 KiB	3.5 s
www.itu.int/js/jquery-1.6.4.min.js	90.6 KiB	2.8 s
www.itu.int/js/itu-own-functions.js	2.3 KiB	394 ms
www.itu.int/js/itu-functions.js	69.2 KiB	2.3 s
www.itu.int/_layouts/15/init.js?rev=TzY%2Fm%2FOoPnHW9OQ41OjrYQ%3D%3DTAG0	82.6 KiB	3.2 s
/ScriptResource.axd?d=FQlq4QX5WsTXFIgYiWTenUSIA9WRG0BOpnj...	10.3 KiB	569 ms
www.itu.int/_layouts/15/blank.js?rev=whhv86DINHGWQe4GPtKl0A%3D%3DTAG0	1.0 KiB	394 ms
/ScriptResource.axd?d=u0dJMJBkSP4O90WEXjB8tUsWcB4BkV1jcwe...	25.6 KiB	1.1 s
www.itu.int/_layouts/15/theming.js?rev=SuLUbbwTXcxFWOWLFUsOkw%3D%3DTAG0	12.8 KiB	743 ms
www.itu.int/Style%20Library/itu-main.css	25.6 KiB	1.3 s
/_layouts/15/1033/initstrings.js?rev=GAkoVg6Sl%2Bo2hXf%2B...	7.2 KiB	917 ms
www.itu.int/Style%20Library/ms-rteCustom-ITUv6.css	1.7 KiB	743 ms
/_layouts/15/1033/styles/Themable/corev15.css?rev=UP2nlZL...	48.6 KiB	1.8 s
www.itu.int/Style%20Library/itu-base.css	3.7 KiB	743 ms

HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Protocol
www.itu.int/en/Pages/default.aspx	http/1.1
/_layouts/15/1033/styles/Themable/corev15.css?rev=UP2nlZL...	http/1.1
/_layouts/15/1033/initstrings.js?rev=GAkoVg6Sl%2Bo2hXf%2B...	http/1.1
www.itu.int/_layouts/15/init.js?rev=TzY%2Fm%2FOoPnHW9OQ41OjrYQ%3D%3DTAG0	http/1.1
www.itu.int/_layouts/15/theming.js?rev=SuLUbbwTXcxFWOWLFUsOkw%3D%3DTAG0	http/1.1
/ScriptResource.axd?d=u0dJMJBkSP4O90WEXjB8tUsWcB4BkV1jcwe...	http/1.1
www.itu.int/_layouts/15/blank.js?rev=whhv86DINHGWQe4GPtKl0A%3D%3DTAG0	http/1.1
/ScriptResource.axd?d=FQlq4QX5WsTXFIgYiWTenUSIA9WRG0BOpnj...	http/1.1
www.itu.int/Style%20Library/itu-base.css	http/1.1
www.itu.int/Style%20Library/itu-main.css	http/1.1
www.itu.int/js/jquery-1.6.4.min.js	http/1.1
www.itu.int/js/jquery-ui-1.8.16.min.js	http/1.1
www.itu.int/js/itu-functions.js	http/1.1
www.itu.int/js/itu-own-functions.js	http/1.1
www.itu.int/Style%20Library/ms-rteCustom-ITUv6.css	http/1.1
www.itu.int/_layouts/15/images/spcommon.png?rev=43	http/1.1
/WebResource.axd?d=fZBssSwBZyrTlT7jnnYJc7xzrAjctNoxqGfV-Q...	http/1.1
www.itu.int/PublishingImages/masterpage/logos/ITU-logo.svg	http/1.1
/en/PublishingImages/homepage-top-corner-logo/2026/pp26-l...	http/1.1
/WebResource.axd?d=Ijg8dHGzYcEK7ifHOUDiwpxSHi6bCuFBNS5BJb...	http/1.1
www.itu.int/PublishingImages/masterpage/buttons/facebook-round.png	http/1.1
www.itu.int/PublishingImages/masterpage/buttons/twitter-round.png	http/1.1
www.itu.int/PublishingImages/masterpage/buttons/linkedin-round.png	http/1.1
www.itu.int/PublishingImages/masterpage/buttons/email-round.png	http/1.1
/en/PublishingImages/slider/2026/AmateurRadio_AdobeStock_...	http/1.1
www.itu.int/en/PublishingImages/slider/2026/artemis-video-slider.jpg	http/1.1
www.itu.int/en/PublishingImages/slider/2026/GICT26-Visual-slider.jpg	http/1.1
www.itu.int/en/PublishingImages/slider/2026/WTPF-26-registration-slider.jpg	http/1.1
www.itu.int/PublishingImages/masterpage/icons/home-feature-active.png	http/1.1
/en/PublishingImages/slider/2026/AmateurRadio_AdobeStock_...	http/1.1
www.itu.int/en/PublishingImages/slider/2026/artemis-video-slider1.jpg	http/1.1
www.itu.int/en/PublishingImages/slider/2026/GICT26-Visual-slider2.jpg	http/1.1
www.itu.int/en/PublishingImages/slider/2026/WTPF-26-registration-slider1.jpg	http/1.1
www.itu.int/Style%20Library/ITU-Flexlistviewer.css	http/1.1
/en/PublishingImages/homepage-news-views/2026/AmateurRadi...	http/1.1
/en/PublishingImages/homepage-news-views/2026/bdt-highlig...	http/1.1
/en/PublishingImages/homepage-news-views/2026/podcast-dig...	http/1.1
/en/PublishingImages/homepage-indepth/2025/facts-and-figu...	http/1.1
/en/PublishingImages/homepage-indepth/2026/AI-publication...	http/1.1
/en/PublishingImages/homepage-indepth/2026/itu-journal-un...	http/1.1
www.itu.int/en/PublishingImages/homepage-4th-row-box/2026/wtisd26-4th-row.jpg	http/1.1
www.itu.int/en/PublishingImages/homepage-4th-row-box/2026/wtpf26-4th-row.jpg	http/1.1
www.itu.int/en/PublishingImages/homepage-4th-row-box/2026/pp26-4th-row.jpg	http/1.1
www.itu.int/en/PublishingImages/home/footer-secretary-general.png	http/1.1
www.itu.int/PublishingImages/masterpage/background/body-top-bg-219x10.png	http/1.1
www.itu.int/PublishingImages/masterpage/buttons/main-nav-bg.gif	http/1.1
www.itu.int/PublishingImages/masterpage/icons/home.png	http/1.1
www.itu.int/PublishingImages/masterpage/background/ITU-subnav-new2.png	http/1.1
www.itu.int/PublishingImages/masterpage/buttons/joinitu-login-bg.png	http/1.1
www.itu.int/PublishingImages/masterpage/background/background-sprite.png	http/1.1
www.itu.int/fonts/DroidSans-Bold-webfont.woff	http/1.1
www.itu.int/fonts/DroidSerif-Regular-webfont.woff	http/1.1
www.itu.int/en/_api/SP.Web.GetContextWebThemeData?lcid=1033	http/1.1
www.itu.int/PublishingImages/masterpage/background/rounded-grey-300.png	http/1.1
www.itu.int/PublishingImages/masterpage/icons/quicklinks-arrow.gif	http/1.1
www.itu.int/PublishingImages/masterpage/icons/more-arrow.png	http/1.1
www.itu.int/PublishingImages/masterpage/buttons/ITU-Buttons.png	http/1.1
www.itu.int/PublishingImages/masterpage/icons/large-blue-arrow.png	http/1.1
www.itu.int/_layouts/15/1033/strings.js?rev=9xQH1OfeylBi9JTCbkHLUQ%3D%3DTAG0	http/1.1
www.itu.int/_layouts/15/core.js?rev=ZDqG1yirPiaXxf0KNWhHeQ%3D%3DTAG0	http/1.1
www.itu.int/_layouts/15/mquery.js?rev=jL3pSyr14DJ%2BBzxX%2FO8UOA%3D%3DTAG0	http/1.1
www.itu.int/_layouts/15/sp.init.js?rev=4WGKMHphnRAirWcCwo3A5Q%3D%3DTAG0	http/1.1
www.itu.int/_layouts/15/sp.core.js?rev=OgufKqhYdMBFaXKypwK%2BkA%3D%3DTAG0	http/1.1
www.itu.int/PublishingImages/masterpage/logos/itu-favicon.ico	http/1.1

Tap interactions may be delayed by up to 300 ms if the viewport is not optimized for mobile.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

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: 3.5 s

URL	Time Spent
itu.int/	1.3 s
www.itu.int/	1.4 s
www.itu.int/Pages/VariationRoot.aspx	397 ms
www.itu.int/en	397 ms
www.itu.int/en/Pages/default.aspx	0.0 ms

Keep the server response time for the main document short because all other requests depend on it. Learn more about the Time to First Byte metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 825 ms

URL	Time Spent
www.itu.int/en/Pages/default.aspx	925 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

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 150 ms 27.2 KiB

URL	Transfer Size	Est Savings
www.itu.int/Style%20Library/itu-main.css	25.6 KiB	12.8 KiB
/_layouts/15/1033/styles/Themable/corev15.css?rev=UP2nlZL...	48.6 KiB	11.1 KiB
www.google.com/cse/static/element/dc329f57de078f5d/default_v6+en.css	12.0 KiB	3.3 KiB

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: 100 ms 32.8 KiB

URL	Transfer Size	Est Savings
www.itu.int/Style%20Library/itu-main.css	24.5 KiB	21.9 KiB
www.google.com/cse/static/element/dc329f57de078f5d/default_v6+en.css	11.9 KiB	10.9 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: 3.4 s 751.1 KiB

URL	Transfer Size	Est Savings
www.itu.int/js/jquery-ui-1.8.16.min.js	197.1 KiB	179.3 KiB
www.itu.int/_layouts/15/core.js?rev=ZDqG1yirPiaXxf0KNWhHeQ%3D%3DTAG0	129.2 KiB	117.7 KiB
www.googletagmanager.com/gtm.js?id=GTM-M2LC5X5	143.0 KiB	65.4 KiB
www.googletagmanager.com/gtag/js?id=G-T69008QZXS&cx=c&gtm=4e64h1	161.1 KiB	64.9 KiB
www.googletagmanager.com/gtag/js?id=UA-121074739-1	115.7 KiB	63.7 KiB
www.itu.int/_layouts/15/init.js?rev=TzY%2Fm%2FOoPnHW9OQ41OjrYQ%3D%3DTAG0	81.9 KiB	56.7 KiB
/cse/static/element/dc329f57de078f5d/cse_element__en.js?u...	102.7 KiB	51.8 KiB
www.itu.int/js/jquery-1.6.4.min.js	89.5 KiB	46.8 KiB
www.itu.int/js/itu-functions.js	68.1 KiB	31.6 KiB
cse.google.com/adsense/search/async-ads.js	43.3 KiB	31.5 KiB
script.hotjar.com/modules.6a0f3932cb1341a35c18.js	56.1 KiB	21.6 KiB
script.hotjar.com/survey-v2.8b9993fd273bc1f4ea37.js	60.6 KiB	20.0 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Total CPU Time	Script Evaluation	Script Parse
script.hotjar.com/modules.6a0f3932cb1341a35c18.js	965 ms	855 ms	31 ms
www.itu.int/en/Pages/default.aspx	679 ms	51 ms	22 ms
Unattributable	547 ms	13 ms	0.0 ms
www.googletagmanager.com/gtag/js?id=G-T69008QZXS&cx=c&gtm=4e64h1	416 ms	348 ms	63 ms
www.googletagmanager.com/gtm.js?id=GTM-M2LC5X5	286 ms	227 ms	56 ms
www.itu.int/_layouts/15/init.js?rev=TzY%2Fm%2FOoPnHW9OQ41OjrYQ%3D%3DTAG0	247 ms	108 ms	40 ms
www.itu.int/js/jquery-1.6.4.min.js	243 ms	125 ms	12 ms
script.hotjar.com/survey-v2.8b9993fd273bc1f4ea37.js	201 ms	132 ms	31 ms
www.googletagmanager.com/gtag/js?id=UA-121074739-1	182 ms	136 ms	45 ms
cse.google.com/cse.js?cx=603416e14d8fe4ef6	153 ms	113 ms	1.7 ms
www.itu.int/_layouts/15/core.js?rev=ZDqG1yirPiaXxf0KNWhHeQ%3D%3DTAG0	121 ms	51 ms	66 ms
www.google-analytics.com/analytics.js	105 ms	73 ms	25 ms
/cse/static/element/dc329f57de078f5d/cse_element__en.js?u...	78 ms	32 ms	43 ms
cse.google.com/adsense/search/async-ads.js	54 ms	34 ms	16 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Category	Time Spent
Script Evaluation	2.5 s
Other	808 ms
Script Parsing & Compilation	572 ms
Style & Layout	543 ms
Rendering	150 ms
Parse HTML & CSS	94 ms
Garbage Collection	9.9 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 reason	Failure type
The page has an unload handler in the main frame.	Actionable
Pages with WebSocket cannot enter back/forward cache.	Pending browser support

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 20.2 KiB

URL	Transfer Size	Est Savings
www.itu.int/js/itu-functions.js	68.1 KiB	17.6 KiB
inline: let originalTextNodes = null; functi…	7.4 KiB	2.6 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
amateur radio `div.home-feature-item > div.hf-photo > a > img`	/en/PublishingImages/slider/2026/AmateurRadio_AdobeStock_...
Artemis `div.home-feature-item > div.hf-photo > a > img`	www.itu.int/en/PublishingImages/slider/2026/artemis-video-slider.jpg
WTISD `div > div.home-block-content > a > img`	www.itu.int/en/PublishingImages/homepage-4th-row-box/2026/wtisd26-4th-row.jpg
WTPF-26 `div > div.home-block-content > a > img`	www.itu.int/en/PublishingImages/homepage-4th-row-box/2026/wtpf26-4th-row.jpg
PP-26 `div.ms-rtestate-field > div.home-block-content > a > img`	www.itu.int/en/PublishingImages/homepage-4th-row-box/2026/pp26-4th-row.jpg
Handbook Amateur Satellite service `dt.flexviewerMainDivDT-newsviews > div.flexviewerMainDivDT-image-newsviews > a > img`	/en/PublishingImages/homepage-news-views/2026/AmateurRadi...
BDT highlights `dt.flexviewerMainDivDT-newsviews > div.flexviewerMainDivDT-image-newsviews > a > img`	/en/PublishingImages/homepage-news-views/2026/bdt-highlig...
podcast `dt.flexviewerMainDivDT-newsviews > div.flexviewerMainDivDT-image-newsviews > a > img`	/en/PublishingImages/homepage-news-views/2026/podcast-dig...
Facts and figures report 2025 `dt.flexviewerMainDivDT-indepth > div.flexviewerMainDivDT-image-indepth > a > img`	/en/PublishingImages/homepage-indepth/2025/facts-and-figu...
AI publications `dt.flexviewerMainDivDT-indepth > div.flexviewerMainDivDT-image-indepth > a > img`	/en/PublishingImages/homepage-indepth/2026/AI-publication...
ITU Journal `dt.flexviewerMainDivDT-indepth > div.flexviewerMainDivDT-image-indepth > a > img`	/en/PublishingImages/homepage-indepth/2026/itu-journal-un...
PP 26 `div.col-10 > div > a > img`	/en/PublishingImages/homepage-top-corner-logo/2026/pp26-l...
Amateur Radio `ul.clearfix > li > a > img`	/en/PublishingImages/slider/2026/AmateurRadio_AdobeStock_...
Artemis `ul.clearfix > li.activeSlide > a > img`	www.itu.int/en/PublishingImages/slider/2026/artemis-video-slider1.jpg
GICT `ul.clearfix > li > a > img`	www.itu.int/en/PublishingImages/slider/2026/GICT26-Visual-slider2.jpg
WTPF-26 `ul.clearfix > li > a > img`	www.itu.int/en/PublishingImages/slider/2026/WTPF-26-registration-slider1.jpg

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

●Layout shift culprits

●Optimize DOM size

●Avoids enormous network payloads Total size was 2,323 KiB

●User Timing marks and measures 5 user timings

●Avoid long main-thread tasks 17 long tasks found

●Avoid non-composited animations 1 animated element found

●Network Requests

●Network Round Trip Times 210 ms

●Server Backend Latencies 210 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid large layout shifts 2 layout shifts found

○INP breakdown

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
Handbook: Amateur and amateur-satellite services `dt.flexviewerMainDivDT-newsviews > div.flexviewerMainDivDT-textarea-newsviews > p > a`
Action, progress and impact in digital development `dt.flexviewerMainDivDT-newsviews > div.flexviewerMainDivDT-textarea-newsviews > p > a`
From Digital skills to growth: Women-led SMEs in Nigeria `dt.flexviewerMainDivDT-newsviews > div.flexviewerMainDivDT-textarea-newsviews > p > a`
Facts and Figures 2025 `dt.flexviewerMainDivDT-indepth > div.flexviewerMainDivDT-textarea-indepth > p > a`
Latest AI for Good publications `dt.flexviewerMainDivDT-indepth > div.flexviewerMainDivDT-textarea-indepth > p > a`
ITU Journal: Enhanced underwater communications `dt.flexviewerMainDivDT-indepth > div.flexviewerMainDivDT-textarea-indepth > p > a`
Feedback `div.css-sfbnep > div.css-112xj8j > button#hj-survey-toggle-1 > span.css-1qk2dqd`

These are opportunities to improve the legibility of your content.

Tables and lists

When definition lists are not properly marked up, screen readers may produce confusing or inaccurate output. Learn how to structure definition lists correctly.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Handbook: Amateur and amateur-satellite services `div#WebPartctl00_SPWebPartManager1_g_ad916b9a_709b_40d9_a89e_b35f4cc90486 > div#ctl00_SPWebPartManager1_g_ad916b9a_709b_40d9_a89e_b35f4cc90486 > div.flexviewerMainDiv-newsviews > dl.flexviewerMainDivDL-newsviews`
Action, progress and impact in digital development `div#WebPartctl00_SPWebPartManager1_g_ad916b9a_709b_40d9_a89e_b35f4cc90486 > div#ctl00_SPWebPartManager1_g_ad916b9a_709b_40d9_a89e_b35f4cc90486 > div.flexviewerMainDiv-newsviews > dl.flexviewerMainDivDL-newsviews`
From Digital skills to growth: Women-led SMEs in Nigeria `div#WebPartctl00_SPWebPartManager1_g_ad916b9a_709b_40d9_a89e_b35f4cc90486 > div#ctl00_SPWebPartManager1_g_ad916b9a_709b_40d9_a89e_b35f4cc90486 > div.flexviewerMainDiv-newsviews > dl.flexviewerMainDivDL-newsviews`
Facts and Figures 2025 `div#WebPartctl00_SPWebPartManager1_g_fbb63ac0_ea34_4c3a_bc78_75ae515494ed > div#ctl00_SPWebPartManager1_g_fbb63ac0_ea34_4c3a_bc78_75ae515494ed > div.flexviewerMainDiv-indepth > dl.flexviewerMainDivDL-indepth`
Latest AI for Good publications `div#WebPartctl00_SPWebPartManager1_g_fbb63ac0_ea34_4c3a_bc78_75ae515494ed > div#ctl00_SPWebPartManager1_g_fbb63ac0_ea34_4c3a_bc78_75ae515494ed > div.flexviewerMainDiv-indepth > dl.flexviewerMainDivDL-indepth`
ITU Journal: Enhanced underwater communications `div#WebPartctl00_SPWebPartManager1_g_fbb63ac0_ea34_4c3a_bc78_75ae515494ed > div#ctl00_SPWebPartManager1_g_fbb63ac0_ea34_4c3a_bc78_75ae515494ed > div.flexviewerMainDiv-indepth > dl.flexviewerMainDivDL-indepth`

These are opportunities to improve the experience of reading tabular or list data using 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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Facts and Figures 2025 `dt.flexviewerMainDivDT-indepth > div.flexviewerMainDivDT-textarea-indepth > p > a`

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.

○Interactive controls are keyboard focusable

○Interactive elements indicate their purpose and state

○The page has a logical tab order

○Visual order on the page follows DOM order

○User focus is not accidentally trapped in a region

○The user's focus is directed to new content added to the page

○HTML5 landmark elements are used to improve navigation

○Offscreen content is hidden from assistive technology

○Custom controls have associated labels

○Custom controls have ARIA roles

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

●`[aria-hidden="true"]` is not present on the document `<body>`

●`[role]`s have all required `[aria-*]` attributes

●`[role]` values are valid

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

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

●Buttons have an accessible name

●Image elements have `[alt]` attributes

●Form elements have associated labels

●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

●Definition list items are wrapped in `<dl>` elements

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●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

●Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

●`[lang]` attributes have a valid value

●Heading elements appear in a sequentially-descending order

●Deprecated ARIA roles were not used

●Identical links have the same purpose.

●Elements with visible text labels have matching accessible names.

○`[accesskey]` values are unique

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

○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

○`[role]`s are contained by their required parent element

○Elements with the `role=text` attribute do not have focusable descendents.

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

○The page contains a heading, skip link, or landmark region

○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

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

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

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

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

○`<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.

○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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Displayed size	Actual size	Expected size
amateur radio `div.home-feature-item > div.hf-photo > a > img`	/en/PublishingImages/slider/2026/AmateurRadio_AdobeStock_...	450 x 325	450 x 325	675 x 488
Artemis `div.home-feature-item > div.hf-photo > a > img`	www.itu.int/en/PublishingImages/slider/2026/artemis-video-slider.jpg	450 x 325	450 x 325	675 x 488
PP-26 `div.ms-rtestate-field > div.home-block-content > a > img`	www.itu.int/en/PublishingImages/homepage-4th-row-box/2026/pp26-4th-row.jpg	300 x 169	300 x 169	450 x 254
WTISD `div > div.home-block-content > a > img`	www.itu.int/en/PublishingImages/homepage-4th-row-box/2026/wtisd26-4th-row.jpg	300 x 169	300 x 169	450 x 254
WTPF-26 `div > div.home-block-content > a > img`	www.itu.int/en/PublishingImages/homepage-4th-row-box/2026/wtpf26-4th-row.jpg	300 x 169	300 x 169	450 x 254
Facts and figures report 2025 `dt.flexviewerMainDivDT-indepth > div.flexviewerMainDivDT-image-indepth > a > img`	/en/PublishingImages/homepage-indepth/2025/facts-and-figu...	280 x 175	280 x 175	420 x 263
AI publications `dt.flexviewerMainDivDT-indepth > div.flexviewerMainDivDT-image-indepth > a > img`	/en/PublishingImages/homepage-indepth/2026/AI-publication...	280 x 175	280 x 175	420 x 263
ITU Journal `dt.flexviewerMainDivDT-indepth > div.flexviewerMainDivDT-image-indepth > a > img`	/en/PublishingImages/homepage-indepth/2026/itu-journal-un...	280 x 175	280 x 175	420 x 263
Handbook Amateur Satellite service `dt.flexviewerMainDivDT-newsviews > div.flexviewerMainDivDT-image-newsviews > a > img`	/en/PublishingImages/homepage-news-views/2026/AmateurRadi...	280 x 175	280 x 175	420 x 263
BDT highlights `dt.flexviewerMainDivDT-newsviews > div.flexviewerMainDivDT-image-newsviews > a > img`	/en/PublishingImages/homepage-news-views/2026/bdt-highlig...	280 x 175	280 x 175	420 x 263
podcast `dt.flexviewerMainDivDT-newsviews > div.flexviewerMainDivDT-image-newsviews > a > img`	/en/PublishingImages/homepage-news-views/2026/podcast-dig...	280 x 175	280 x 175	420 x 263
Amateur Radio `ul.clearfix > li > a > img`	/en/PublishingImages/slider/2026/AmateurRadio_AdobeStock_...	94 x 68	94 x 68	141 x 102
GICT `ul.clearfix > li > a > img`	www.itu.int/en/PublishingImages/slider/2026/GICT26-Visual-slider2.jpg	94 x 68	94 x 68	141 x 102
WTPF-26 `ul.clearfix > li > a > img`	www.itu.int/en/PublishingImages/slider/2026/WTPF-26-registration-slider1.jpg	94 x 68	94 x 68	141 x 102
Artemis `ul.clearfix > li.activeSlide > a > img`	www.itu.int/en/PublishingImages/slider/2026/artemis-video-slider1.jpg	94 x 68	94 x 68	141 x 102
div.home-feature-nav > ul.clearfix > li.activeSlide > img.arrow `div.home-feature-nav > ul.clearfix > li.activeSlide > img.arrow`	www.itu.int/PublishingImages/masterpage/icons/home-feature-active.png	26 x 26	26 x 26	39 x 39

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 / Warning	Source
Unload event listeners are deprecated and will be removed.	www.itu.int/_layouts/15/init.js?rev=TzY%2Fm%2FOoPnHW9OQ41OjrYQ%3D%3DTAG0

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.

Source	Description
s7.addthis.com/js/300/addthis_widget.js#pubid=iturss	`Failed to load resource: net::ERR_NAME_NOT_RESOLVED`

●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

●Page has the HTML doctype

●Properly defines charset

●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

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 destination	Link Text
/women-and-girls/girls-in-ict/international-girls-in-ict-...	Learn more

Format your HTML in a way that enables crawlers to better understand your app’s content.

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Document has a meta description

●Page has successful HTTP status code

●Links are crawlable

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`