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Lighthouse Mobile

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

Audit breakdown by category with detailed findings.

28

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.telekom.de/resources/javascript/742268/ess-redesign.js3600.0 s127.5 KiB
tags-eu.tiqcdn.com/utag/telekom/unterhaltung/prod/utag.js300.0 s83.9 KiB
www.telekom.de/resources/javascript/379488/entertainment.all.min.js3600.0 s97.9 KiB
www.telekom.de/resources/nexus/nexus-pk-coin-zh3600.0 s82.2 KiB
www.telekom.de/resources/ag1/start/startseite.js?v=6033bb173600.0 s66.1 KiB
www.telekom.de/resources/css/379486/entertainment-main.min.css3600.0 s65.9 KiB
ebs10.telekom.de/opt-in/font/teleneo/teleneo-bold.woff20.0 ms52.5 KiB
ebs10.telekom.de/opt-in/font/teleneo/teleneo-regular.woff20.0 ms52.1 KiB
www2.telekom.de/forward/ablyft-cdn/s/55651514.js60.0 s50.3 KiB
www.telekom.de/resources/sites/phoenix/style/font/teleneo-bold.woff23600.0 s59.6 KiB
www.telekom.de/resources/sites/phoenix/style/font/teleneo-medium.woff23600.0 s59.2 KiB
www.telekom.de/resources/sites/phoenix/style/font/teleneo-extrabold.woff23600.0 s58.9 KiB
www.telekom.de/resources/sites/phoenix/style/font/teleneo-regular.woff23600.0 s58.7 KiB
www.telekom.de/resources/sites/phoenix/style/font/teleneo-thin.woff23600.0 s54.7 KiB
www.telekom.de/resources/sites/phoenix/style/font/teleneo-ultra.woff23600.0 s47.2 KiB
www.telekom.de/resources/javascript/1296738/cms-bridge.js3600.0 s47.0 KiB
www.telekom.de/resources/ag1/react.2d5c17e5.js3600.0 s46.3 KiB
www.telekom.de/resources/css/1296646/cms-bridge.css3600.0 s30.7 KiB
www.telekom.de/resources/ag1/start/startseite.css?v=6033bb173600.0 s23.0 KiB
www.telekom.de/resources/css/742262/ess-redesign.css3600.0 s17.1 KiB
www.telekom.de/resources/javascript/1296736/vendors.98.js3600.0 s12.5 KiB
www.telekom.de/resources/javascript/617438/header.js3600.0 s10.7 KiB
www.telekom.de/resources/javascript/1295912/asterisk.1027.js3600.0 s9.6 KiB
www.telekom.de/resources/javascript/1295956/vendors.1463.js3600.0 s8.8 KiB
/resources/images/1307666/telekom-startseite-teaser-wide-...604800.0 s54.2 KiB
/resources/images/1310904/telekom-startseite-buehne-backg...604800.0 s44.1 KiB
www.telekom.de/resources/javascript/1296766/vendors.2648.js3600.0 s5.2 KiB
www.telekom.de/resources/javascript/584608/footer.js3600.0 s4.3 KiB
www.telekom.de/resources/css/796548/global.css3600.0 s4.3 KiB
www.telekom.de/resources/css/617436/header.css3600.0 s3.8 KiB
www.telekom.de/resources/javascript/1296668/CMSNotificationsContainer.455.js3600.0 s2.3 KiB
www.telekom.de/resources/css/584606/footer.css3600.0 s1.7 KiB
ebs10.telekom.de/opt-in/icon/utiq.svg0.0 ms1.2 KiB
www.telekom.de/resources/css/1215896/smart-banner-2025-1.css3600.0 s1.4 KiB
www.telekom.de/resources/images/1292358/logo.webp604800.0 s6.3 KiB
www.telekom.de/resources/images/1215564/meinmagentaapp-ma.jpg604800.0 s3.9 KiB
www.telekom.de/resources/images/1215536/meinmagentaapp.jpeg604800.0 s3.8 KiB
www.telekom.de/resources/images/843998/ideenschmiede.png604800.0 s3.5 KiB
www.telekom.de/resources/images/620622/instagram.svg604800.0 s2.5 KiB
/telekom/tdg-eventstream-main/019d973b69ff000ac1623ea31a6...0.0 ms251 B
/telekom/tdg-eventstream-main/019d973b69ff000ac1623ea31a6...0.0 ms250 B
/telekom/tdg-eventstream-main/019d973b69ff000ac1623ea31a6...0.0 ms250 B
/telekom/tdg-eventstream-main/019d973b69ff000ac1623ea31a6...0.0 ms249 B
www.telekom.de/resources/images/620624/thc.svg604800.0 s2.1 KiB
www.telekom.de/resources/images/974640/mobilfunk-tarife-optionen.svg604800.0 s2.1 KiB
www.telekom.de/resources/images/974654/tv-tarife.svg604800.0 s2.1 KiB
www.telekom.de/resources/images/974632/internet-tarife.svg604800.0 s2.1 KiB
www.telekom.de/resources/images/974624/ratings-default.svg604800.0 s2.0 KiB
www.telekom.de/resources/images/620618/linkedin-white.svg604800.0 s1.9 KiB
www.telekom.de/resources/images/974636/mobilfunk-geraete.svg604800.0 s1.9 KiB
www.telekom.de/resources/images/974650/tv-geraete.svg604800.0 s1.8 KiB
www.telekom.de/resources/images/360376/app-icon.svg604800.0 s1.8 KiB
www.telekom.de/resources/images/974628/internet-geraete.svg604800.0 s1.6 KiB
www.telekom.de/resources/images/974634/internet-vernetztes-zuhause.svg604800.0 s1.6 KiB
www.telekom.de/resources/images/974586/service-hilfe-hover.svg604800.0 s1.6 KiB
www.telekom.de/resources/images/974588/service-kontakt-hover.svg604800.0 s1.4 KiB
www.telekom.de/resources/images/974630/internet-netz.svg604800.0 s1.4 KiB
www.telekom.de/resources/images/693214/login-notification.svg604800.0 s1.4 KiB
www.telekom.de/resources/images/1073408/tiktok-icon.svg604800.0 s1.3 KiB
www.telekom.de/resources/images/620620/youtube.svg604800.0 s1.3 KiB
www.telekom.de/resources/images/1008362/phone-number-hover.svg604800.0 s1.2 KiB
www.telekom.de/resources/images/1008364/phone-number-default.svg604800.0 s1.2 KiB
www.telekom.de/resources/images/1080218/close-hover.svg604800.0 s1.2 KiB
www.telekom.de/resources/images/1080216/close.svg604800.0 s1.2 KiB
www.telekom.de/resources/images/974638/mobilfunk-netz.svg604800.0 s1.1 KiB
www.telekom.de/resources/images/1080212/cart.svg604800.0 s1.1 KiB
www.telekom.de/resources/images/1080214/cart-hover.svg604800.0 s1.1 KiB
www.telekom.de/resources/images/974590/service-stoerung-hover.svg604800.0 s1.1 KiB
www.telekom.de/resources/images/1050454/data-privacy-outline-white.svg604800.0 s1.0 KiB
www.telekom.de/resources/images/1080210/arrow-right-hover.svg604800.0 s997 B
www.telekom.de/resources/images/974660/telekom-logo.svg604800.0 s983 B
www.telekom.de/resources/images/1080222/login-hover.svg604800.0 s969 B
www.telekom.de/resources/images/974652/tv-inhalte.svg604800.0 s967 B
www.telekom.de/resources/images/1080220/login.svg604800.0 s966 B
www.telekom.de/resources/images/1080226/menu-hover.svg604800.0 s957 B
www.telekom.de/resources/images/1080224/menu.svg604800.0 s956 B
www.telekom.de/resources/images/1080230/search-hover.svg604800.0 s942 B
www.telekom.de/resources/images/1080228/search.svg604800.0 s942 B
www.telekom.de/resources/images/620616/facebook.svg604800.0 s901 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:0.632628] map[node:map[boundingRect:map[bottom:821 height:654 left:2 right:414 top:167 width:412] lhId:page-1-DIV nodeLabel:Cookies and similar technologies We use cookies and similar technologies (incl… path:1,HTML,1,BODY,21,DIV,1,DIV,1,DIALOG,0,DIV selector:div#__tealiumGDPRecModal > div.cl-outer > dialog#promptLayerContent > div.cl-content snippet:<div class="cl-content"> type:node] score:0.632628]]

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
ebs10.telekom.de/opt-in/font/teleneo/teleneo-bold.woff2305 ms
ebs10.telekom.de/opt-in/font/teleneo/teleneo-regular.woff2220 ms
www.telekom.de/resources/sites/phoenix/style/font/teleneo-medium.woff240 ms
www.telekom.de/resources/sites/phoenix/style/font/teleneo-regular.woff235 ms
www.telekom.de/resources/sites/phoenix/style/font/teleneo-bold.woff235 ms
www.telekom.de/resources/sites/phoenix/style/font/teleneo-thin.woff235 ms
www.telekom.de/resources/sites/phoenix/style/font/teleneo-extrabold.woff235 ms
www.telekom.de/resources/sites/phoenix/style/font/teleneo-ultra.woff235 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:41.296 source:map[column:14 line:21 type:source-location url:https://www.telekom.de/resources/ag1/react.2d5c17e5.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:38.856 source:map[column:40294 line:1 type:source-location url:https://www.telekom.de/resources/ag1/start/startseite.js?v=6033bb17 urlProvider:network]] map[reflowTime:1.076 source:map[column:49930 line:1 type:source-location url:https://www.telekom.de/resources/ag1/start/startseite.js?v=6033bb17 urlProvider:network]] map[reflowTime:0.993 source:map[column:93003 line:1 type:source-location url:https://www.telekom.de/resources/ag1/start/startseite.js?v=6033bb17 urlProvider:network]] map[reflowTime:0.284 source:map[column:39357 line:1 type:source-location url:https://www.telekom.de/resources/ag1/start/startseite.js?v=6033bb17 urlProvider:network]] map[reflowTime:0.087 source:map[column:92410 line:1 type:source-location url:https://www.telekom.de/resources/ag1/start/startseite.js?v=6033bb17 urlProvider:network]]]

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-0-IMG
nodeLabel: 400 € Preisvorteil
path: 1,HTML,1,BODY,14,DIV,1,DIV,0,DIV,5,DIV,0,DIV,0,UL,0,LI,0,DIV,0,DIV,4,DIV,0,DIV,0,DIV,1,DIV,0,PICTURE,3,IMG
selector: div.styles_AnimatedFrame__2RhXf > div.styles_AnimatedFrame__background-wrapper__5MdMo > picture > img.Image__image___UKHr-
snippet: <img class="Image__image___UKHr- styles_AnimatedFrame__background__2qEgM" alt="400 € Preisvorteil" src="/resources/images/1310904/telekom-startseite-buehne-background-s.webp">

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.

URLProtocol
omega-webfrontend.dsa.telekom-dienste.de/hercules/sa.js?ts=1776358746610http/1.1
omega-webfrontend.dsa.telekom-dienste.de/hercules/main.js?ts=1776358746610http/1.1
omega-webfrontend.dsa.telekom-dienste.de/hercules/assets/main-383202f7.jshttp/1.1
omega-webfrontend.dsa.telekom-dienste.de/hercules/main.jshttp/1.1
omega-webfrontend.dsa.telekom-dienste.de/hercules/assets/index-35bb8ed5.jshttp/1.1
omega-webfrontend.dsa.telekom-dienste.de/hercules/assets/core-f9dbfed6.jshttp/1.1
/va/config-hercules-prodMaster-pk.json?ts=1776358747218http/1.1
/hercules/assets/omegaAppLoader-4b5ce9f5.jshttp/1.1
/hercules/assets/usePortalFooter-5281af75.jshttp/1.1
/hercules/assets/notification-94e4b656.mp3http/1.1
omega-webfrontend.dsa.telekom-dienste.de/hercules/locales/de_DE/translation.jsonhttp/1.1

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.

URLTransfer SizeDuration
ebs01.telekom.de/resout/legalnote-replacer/legalnote-replacer.js1.6 KiB878 ms
www.telekom.de/resources/javascript/742268/ess-redesign.js127.5 KiB752 ms
www.telekom.de/start/ruxitagentjs_ICA7NVfhqrux_10333260303165926.js0 B
www.telekom.de/resources/javascript/379488/entertainment.all.min.js97.9 KiB451 ms
www.telekom.de/resources/javascript/617438/header.js10.7 KiB
www.telekom.de/resources/css/379486/entertainment-main.min.css65.9 KiB2.0 s
www.telekom.de/resources/javascript/584608/footer.js4.3 KiB
www.telekom.de/resources/css/796548/global.css4.3 KiB
www.telekom.de/resources/css/742262/ess-redesign.css17.1 KiB301 ms
www.telekom.de/resources/css/617436/header.css3.8 KiB
www.telekom.de/resources/css/584606/footer.css1.7 KiB
www.telekom.de/resources/css/1296646/cms-bridge.css30.7 KiB451 ms
tags-eu.tiqcdn.com/utag/telekom/unterhaltung/prod/utag.js83.9 KiB2.4 s

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
400 € Preisvorteil div.styles_AnimatedFrame__2RhXf > div.styles_AnimatedFrame__background-wrapper__5MdMo > picture > img.Image__image___UKHr-
/resources/images/1310904/telekom-startseite-buehne-backg...43.5 KiB34.7 KiB
Wir holen die WM nach Hause - Thomas Müller feiert mit Fans aller Länder div.styles_AnimatedFrame__2RhXf > div.styles_AnimatedFrame__background-wrapper__5MdMo > picture > img.Image__image___UKHr-
/resources/images/1307666/telekom-startseite-teaser-wide-...53.5 KiB32.2 KiB
Telekom official Broadcaster of FIFA WM 2026 div.styles_AnimatedFrame__2RhXf > div.styles_AnimatedFrame__content-wrapper__1auIR > div.Stage_Stage__logobox__2Tcqq > img.Image__image___UKHr-
www.telekom.de/resources/images/1292358/logo.webp5.7 KiB5.3 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: 1.6 s
URLTime Spent
telekom.de/848 ms
www.telekom.de/786 ms
www.telekom.de/start0.0 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
Cookies and similar technologies We use cookies and similar technologies (incl… div#__tealiumGDPRecModal > div.cl-outer > dialog#promptLayerContent > div.cl-content
0.633

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

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: 460 ms 24.5 KiB
URLTransfer SizeEst Savings
tags-eu.tiqcdn.com/utag/telekom/unterhaltung/prod/utag.js83.7 KiB20.6 KiB
/utag/telekom/unterhaltung/prod/utag.109.js?utv=ut4.54.20...9.5 KiB3.9 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: 750 ms 129.7 KiB
URLTransfer SizeEst Savings
www.telekom.de/resources/css/379486/entertainment-main.min.css65.4 KiB64.7 KiB
www.telekom.de/resources/css/1296646/cms-bridge.css30.2 KiB29.3 KiB
www.telekom.de/resources/ag1/start/startseite.css?v=6033bb1722.4 KiB19.4 KiB
www.telekom.de/resources/css/742262/ess-redesign.css16.5 KiB16.3 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: 1.6 s 372.4 KiB
URLTransfer SizeEst Savings
www.telekom.de/resources/javascript/742268/ess-redesign.js125.6 KiB77.4 KiB
omega-webfrontend.dsa.telekom-dienste.de/hercules/assets/index-35bb8ed5.js125.1 KiB71.4 KiB
www.telekom.de/resources/javascript/379488/entertainment.all.min.js97.4 KiB61.8 KiB
/hercules/assets/usePortalFooter-5281af75.js105.1 KiB48.4 KiB
www.telekom.de/resources/nexus/nexus-pk-coin-zh81.5 KiB41.1 KiB
omega-webfrontend.dsa.telekom-dienste.de/hercules/assets/core-f9dbfed6.js77.2 KiB27.3 KiB
www.telekom.de/resources/javascript/1296738/cms-bridge.js46.5 KiB23.4 KiB
tags-eu.tiqcdn.com/utag/telekom/unterhaltung/prod/utag.js83.6 KiB21.6 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.

URLTotal CPU TimeScript EvaluationScript Parse
Unattributable813 ms106 ms0.0 ms
/hercules/assets/usePortalFooter-5281af75.js792 ms294 ms1.4 ms
www.telekom.de/start458 ms17 ms0.9 ms
www.telekom.de/resources/ag1/react.2d5c17e5.js444 ms222 ms16 ms
omega-webfrontend.dsa.telekom-dienste.de/hercules/assets/core-f9dbfed6.js409 ms187 ms1.0 ms
tags-eu.tiqcdn.com/utag/telekom/unterhaltung/prod/utag.js262 ms191 ms32 ms
www.telekom.de/resources/javascript/379488/entertainment.all.min.js217 ms140 ms24 ms
omega-webfrontend.dsa.telekom-dienste.de/hercules/assets/index-35bb8ed5.js156 ms97 ms1.7 ms
ebs01.telekom.de/resout/legalnote-replacer/build/p-befae207.js135 ms40 ms0.2 ms
www.telekom.de/resources/nexus/nexus-pk-coin-zh130 ms110 ms19 ms
www.telekom.de/resources/javascript/742268/ess-redesign.js127 ms85 ms29 ms
/utag/telekom/unterhaltung/prod/utag.103.js?utv=ut4.54.20...126 ms121 ms1.9 ms
www.telekom.de/resources/ag1/start/startseite.js?v=6033bb17111 ms68 ms34 ms
www2.telekom.de/forward/ablyft-cdn/s/55651514.js72 ms15 ms13 ms
www.telekom.de/resources/javascript/617438/header.js64 ms37 ms3.3 ms
www.telekom.de/resources/javascript/1296738/cms-bridge.js59 ms35 ms14 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation1.9 s
Other1.4 s
Style & Layout640 ms
Rendering306 ms
Script Parsing & Compilation225 ms
Parse HTML & CSS121 ms
Garbage Collection22 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
The page has an unload handler in the main frame.Actionable

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
Telekom div.chf-header__inner > div.chf-header-logo > a.chf-header-logo__inner > img
www.telekom.de/resources/images/974660/telekom-logo.svg
Utiq-Logo div#cl-intro > p > span#includingUtiq > img#utiqLogoParagraph
ebs10.telekom.de/opt-in/icon/utiq.svg
Utiq-Logo div.cl-content > div#cl-intro > div#utiqMessage > img#utiqLogo
ebs10.telekom.de/opt-in/icon/utiq.svg

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

●Max Potential First Input Delay 110 ms
●Optimize DOM size
●LCP breakdown
●Optimize viewport for mobile
●Minify CSS
●Avoids enormous network payloads Total size was 2,181 KiB
●Avoid long main-thread tasks 13 long tasks found
●Avoid non-composited animations 3 animated elements found
●Network Requests
●Network Round Trip Times 50 ms
●Server Backend Latencies 40 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 70 ms
○INP breakdown
○User Timing marks and measures
92

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Names and labels

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
body > div#smart-banner > div.smart-banner > button.smart-banner__close body > div#smart-banner > div.smart-banner > button.smart-banner__close

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
© Telekom Deutschland GmbH footer.chf-footer > div > div.chf-legal-container > a.chf-link

These items highlight common accessibility best practices.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Facebook div.chf-flex-container__item > ul.chf-flex-container > li.chf-flex-container__item > a.chf-link
LinkedIn div.chf-flex-container__item > ul.chf-flex-container > li.chf-flex-container__item > a.chf-link
YouTube div.chf-flex-container__item > ul.chf-flex-container > li.chf-flex-container__item > a.chf-link
Instagram div.chf-flex-container__item > ul.chf-flex-container > li.chf-flex-container__item > a.chf-link
Telekom hilft div.chf-flex-container__item > ul.chf-flex-container > li.chf-flex-container__item > a.chf-link
Ideenschmiede div.chf-flex-container__item > ul.chf-flex-container > li.chf-flex-container__item > a.chf-link
tiktok div.chf-flex-container__item > ul.chf-flex-container > li.chf-flex-container__item > a.chf-link
Datenschutz nav.chf-legal-nav > ul.chf-legal-nav__inner > li.chf-flex-container__item > a.chf-link
○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
●Image elements have `[alt]` attributes
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●ARIA attributes are used as specified for the element's role
●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<frame>` or `<iframe>` elements have a title
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links 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
●No element has a `[tabindex]` value greater than 0
●Heading elements appear in a sequentially-descending order
●`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Image elements do not have `[alt]` attributes that are redundant text.
●Identical links have the same purpose.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements 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
○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.
○Skip links are focusable.
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
77

Best Practices

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
Unload event listeners are deprecated and will be removed.
/hercules/assets/omegaAppLoader-4b5ce9f5.js

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
www.telekom.de/start/ruxitagentjs_ICA7NVfhqrux_10333260303165926.js
Failed to load resource: the server responded with a status of 404 ()
●Uses HTTPS
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●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
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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`
●Document has a valid `rel=canonical`
○robots.txt is valid

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