Lighthouse Desktop

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

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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
/resources/assets/css/assets/9ae5a60f8f99358b3179-ardplay...	3600.0 s	11.5 KiB
/image/51d0641f-0130-4a85-84af-69db5dda0c8e/AAABmr8-o_o/A...	734698.0 s	74.7 KiB
www.tagesschau.de/resources/assets/icon/ts_watermark_white.svg	1.0 s	6.8 KiB
www.gstatic.com/eureka/clank/147/cast_sender.js	86400.0 s	13.4 KiB
/image/500bafa6-a89b-486b-8430-4483869f0d0a/AAABnZIYz50/A...	2569737.0 s	55.8 KiB
player.h-cdn.com/loader.js?customer=ard_de	300.0 s	4.7 KiB
/image/b24e1af8-b729-4a38-a0e5-b056bd14b7f9/AAABnZB1t6U/A...	2562208.0 s	39.2 KiB
/image/91bd61fe-8d42-4e5f-9cf1-397060dd0b26/AAABnZJ5eGQ/A...	2579462.0 s	34.0 KiB
/image/bfb54ea1-e6a4-4130-a8cc-da5397d41181/AAABnZGdc-Q/A...	2561686.0 s	28.6 KiB
/image/3f1b4abb-374a-4265-872b-2859d0e85260/AAABnZE0ql0/A...	2554803.0 s	27.9 KiB
/image/ad903341-f090-404b-bc8a-178698261126/AAABnZGWLJ4/A...	2574391.0 s	27.2 KiB
/image/34ba0d3e-fa59-4ea4-8eda-7f06e289563d/AAABnZCXLag/A...	2544472.0 s	21.8 KiB
/image/b70e1062-6b31-4551-b394-0c9279d8a87e/AAABnZHvCSc/A...	2568350.0 s	19.9 KiB
/image/9f6dd403-91a4-4726-ac00-3ea844754b16/AAABnZGFalQ/A...	2560164.0 s	18.2 KiB
/image/618f51d0-1825-4b6d-a02f-2d508235ce7d/AAABnZB6K8o/A...	2542568.0 s	14.6 KiB
/image/9a300bab-f924-4213-b43e-ea07aff3d0b2/AAABnZIZo1w/A...	2574387.0 s	14.4 KiB
/image/a75a83d7-20e4-4ce7-84d4-ba885dbcf6ef/AAABnZIXNjI/A...	2572601.0 s	13.2 KiB
/resources/assets/icon/icon-ard-external-link--fill-emoti...	605.0 s	936 B
/image/427ae66c-a579-46d7-a134-630dc8d3762d/AAABnZFuOGo/A...	2568350.0 s	8.2 KiB
/image/35510126-b002-452b-a4f9-7f6b870152fc/AAABldr9Jik/A...	2578521.0 s	5.5 KiB
www.tagesschau.de/resources/assets/icon/timeline-icon--fill-black.svg	1.0 s	387 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.

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: Robert Fico und Andrej Babis

path: 1,HTML,1,BODY,1,DIV,1,MAIN,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,PICTURE,8,IMG

selector: div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image

snippet: <img loading="lazy" decoding="async" class="ts-image" src="https://images.tagesschau.de/image/500bafa6-a89b-486b-8430-4483869f0d0a/AA…" alt="Robert Fico und Andrej Babis">

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

More than 4 preconnect connections were found. These should be used sparingly and only to the most important origins.

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

title: Preconnected origins

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

title: Preconnect candidates

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.

URL	Transfer Size	Duration
www.tagesschau.de/resources/assets/js/ts/smartbanner/smartbanner.min.js	3.1 KiB
www.tagesschau.de/resources/assets/js/ts/smartbanner/smartbanner.min.css	1.2 KiB
www.tagesschau.de/resources/assets/css/main-3754c478184023a8a18b.css	73.8 KiB	80 ms

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
/resources/assets/css/assets/9ae5a60f8f99358b3179-ardplay...	5.0 ms

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
tagesschau24 Livestream Logo `div.mediaplayer__wrapper > div.vue-picture > picture.ts-picture__poster-wrapper > img.vue-picture__image`	/image/51d0641f-0130-4a85-84af-69db5dda0c8e/AAABmr8-o_o/A...	74.4 KiB	60.0 KiB
Ölraffinerie, Pulau Bukom, Singapur. `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`	/image/b24e1af8-b729-4a38-a0e5-b056bd14b7f9/AAABnZB1t6U/A...	38.9 KiB	31.2 KiB
Eine Zapfpistole steckt in einem Tank. `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`	/image/ad903341-f090-404b-bc8a-178698261126/AAABnZGWLJ4/A...	26.9 KiB	21.6 KiB
Robert Fico und Andrej Babis `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`	/image/500bafa6-a89b-486b-8430-4483869f0d0a/AAABnZIYz50/A...	55.5 KiB	20.0 KiB
Geflüchtete aus dem Sudan in der tschadischen Grenzstadt Adré. `div.mediaplayer__wrapper > div.vue-picture > picture.ts-picture__poster-wrapper > img.vue-picture__image`	/image/91bd61fe-8d42-4e5f-9cf1-397060dd0b26/AAABnZJ5eGQ/A...	33.7 KiB	19.2 KiB
Menschen gehen in der Hauptstadt Khartum an den Trümmern eines Gebäudes vorbei. `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`	/image/b70e1062-6b31-4551-b394-0c9279d8a87e/AAABnZHvCSc/A...	19.6 KiB	6.1 KiB
Sendungsbild `div.mediaplayer__wrapper > div.vue-picture > picture.ts-picture__poster-wrapper > img.vue-picture__image`	/image/bfb54ea1-e6a4-4130-a8cc-da5397d41181/AAABnZGdc-Q/A...	28.3 KiB	4.3 KiB

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

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: 80 ms 62.8 KiB

URL	Transfer Size	Est Savings
www.tagesschau.de/resources/assets/css/main-3754c478184023a8a18b.css	73.5 KiB	62.8 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: 80 ms 436.0 KiB

URL	Transfer Size	Est Savings
player.h-cdn.com/loader.js?customer=ard_de&no_conf=true&md5=933738-0acf1ad1	243.4 KiB	169.3 KiB
www.tagesschau.de/resources/assets/9860-04797034dec49ec10d84.chunk.bundle.js	254.5 KiB	155.9 KiB
www.tagesschau.de/resources/assets/modern-20c517e20810c30c1af7.bundle.js	175.5 KiB	88.5 KiB
www.tagesschau.de/resources/assets/8354-f0ee7055d7d9e2ac857f.chunk.bundle.js	28.0 KiB	22.3 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
Robert Fico und Andrej Babis `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`	/image/500bafa6-a89b-486b-8430-4483869f0d0a/AAABnZIYz50/A...
Lars Klingbeil `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`	/image/9a300bab-f924-4213-b43e-ea07aff3d0b2/AAABnZIZo1w/A...
Eine Zapfpistole steckt in einem Tank. `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`	/image/ad903341-f090-404b-bc8a-178698261126/AAABnZGWLJ4/A...
Blaue Fahne mit UN-Logo `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`	/image/35510126-b002-452b-a4f9-7f6b870152fc/AAABldr9Jik/A...
Ölraffinerie, Pulau Bukom, Singapur. `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`	/image/b24e1af8-b729-4a38-a0e5-b056bd14b7f9/AAABnZB1t6U/A...
Peter Magyar `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`	/image/427ae66c-a579-46d7-a134-630dc8d3762d/AAABnZFuOGo/A...
Menschen gehen in der Hauptstadt Khartum an den Trümmern eines Gebäudes vorbei. `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`	/image/b70e1062-6b31-4551-b394-0c9279d8a87e/AAABnZHvCSc/A...
Boris Pistorius `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`	/image/a75a83d7-20e4-4ce7-84d4-ba885dbcf6ef/AAABnZIXNjI/A...
Sportschau Logo `ul.tile-list > li.tile-list__item > a.tile > img.tile__image`
Mediathek Logo `ul.tile-list > li.tile-list__item > a.tile > img.tile__image`
ARD Sounds Logo `ul.tile-list > li.tile-list__item > a.tile > img.tile__image`
KiKA Logo `ul.tile-list > li.tile-list__item > a.tile > img.tile__image`
Dieses Foto, das am 15. April 2026 von der türkischen Nachrichtenagentur DHA (D… `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Eingang zum BBC-Hauptgebäude in London `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Migranten gehen in Dover von Bord eines Schiffes der Grenzschutzbehörde. `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Zwei Schwestern sitzen auf der Couch und gucken in das Tablet ihrer Eltern. `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Benzinpreise werden an der Anzeigetafel einer Tankstelle angezeigt. `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
E-Auto an einer Ladesäule. `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Eine Mitarbeiterin hält einen Urinbeutel auf einer Station im KRH Klinikum Silo… `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Schülerinnen und Schüler eines Gymnasiums sitzen vor Beginn ihrer schriftlichen… `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Jan van Aken `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Eine Hostess trägt eine frühere Lufthansa-Uniform vor einem Passagierflugzeug d… `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Alexander Dobrindt `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Der Buckelwal vor Poel soll nun doch gerettet werden. `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Bayerns Aleksandar Pavlovic bejubelt seinen Treffer zum 1:1-Ausgleich gegen Real `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Polizeianwärter werfen bei einer Vereidigungsfeier der Polizei Nordrhein-Westfa… `div.swiper-img-wrapper > div.vue-picture > picture.ts-picture > img.vue-picture__image`
Im Hafen vor der Naturbühne am Großen Jasmunder Bodden werden Koggen mit einem … `div.swiper-img-wrapper > div.vue-picture > picture.ts-picture > img.vue-picture__image`
Blick auf die Hütten des Kibera-Slums in Nairobi, Kenia. `div.swiper-img-wrapper > div.vue-picture > picture.ts-picture > img.vue-picture__image`
Ein Jungtier der Oliv-Bastardschildkröte wird an einem Strand in Banda Aceh fre… `div.swiper-img-wrapper > div.vue-picture > picture.ts-picture > img.vue-picture__image`
Skulpturen von Rodin und Michelangelo sind im Pariser Louvre ausgestellt. `div.swiper-img-wrapper > div.vue-picture > picture.ts-picture > img.vue-picture__image`
Sendungsbild `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Sendungsbild `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Sendungsbild `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Sendungsbild `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Sendungsbild `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Sendungsbild `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Robert Fico und Andrej Babis `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Peter Magyar `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Blaue Fahne mit UN-Logo `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Eine Zapfpistole steckt in einem Tank. `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Polizeianwärter werfen bei einer Vereidigungsfeier der Polizei Nordrhein-Westfa… `div.teaser-xs__image > div.ts-picture__wrapper > picture.ts-picture > img.ts-image`
Dieses Foto, das am 15. April 2026 von der türkischen Nachrichtenagentur DHA (D… `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Alexander Dobrindt `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Schülerinnen und Schüler eines Gymnasiums sitzen vor Beginn ihrer schriftlichen… `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Boris Pistorius `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Lars Klingbeil `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Nina Warken `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Polizisten durchkämmen das Areal um den Fundort einer Kinderleiche. `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Der Schriftzug "Rathaus" ist am alten Rathaus in Schwerin zu sehen. `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Patienten in einem Wartezimmer. `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Stalagmiten sind im Schacht Asse II im Landkreis Wolfenbüttel zu sehen. `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Donald Trump `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Ein Schiff in der Straße von Hormus vor der Küste der Provinz Musandam in Oman. `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Auf diesem von der Pressestelle des Pentagons zur Verfügung gestellten Bild fah… `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Papst Leo XIV. im Petersdom während eines Friedensgebets. `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Ein Fischer legte sein Boot in der Nähe der Insel Kamorta im Andamanen- und Nik… `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Flüchtlingsfrauen im Flüchtlingscamp Korsi in Birao. `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Mark Carney `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Abhörstation des BND in Bad Aibling (Bayern) `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Eine Tankstelle in Berlin. `div.teaser__media > div.ts-picture__wrapper > picture.ts-picture > img.ts-image`
Choco Forest `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Wellen brechen sich in der Nähe des Ostseestrandes in Wustrow. `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Blick über die Ausgrabungen in Fano. `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Das Logo des IWF ist an einer Hauswand zu sehen. `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Menschen gehen am frühen Morgen des zweiten Streiktages der Lufthansa-Piloten, … `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Geldscheine liegen auf einem Tisch. `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Geparkte Lufthansa Maschinen stehen am Frankfurter Flughafen. `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Eie Kundin betankt ein Auto an einer Tankstelle. `div.teaser-xs__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Börsenhändler in Frankfurt `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Ousmane Dembele jubelt über seine Treffer `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Barcelonas Lamine Yamal reagiert verärgert auf das Ausscheiden in der Champions… `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Jubel bei den DFB-Frauen `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Cindy Klink `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
Lottokugeln `div.columns > div.ts-picture__wrapper > picture.ts-picture > img.ts-image`
teaserbild `div.teaser__media > div.ts-picture__wrapper > picture.ts-picture > img.ts-image`
Regenradar `div.teaser__media > div.ts-picture__wrapper > picture.ts-picture > img.ts-image`
Glasfaserkabel liegen auf einer Baustelle. `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`
15 Minuten: Heute mit Julia Barth und Moritz Zachow `div.teaser__media > div.ts-picture__poster-wrapper > picture.ts-picture > img.ts-image`

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

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: 244 ms

URL	Time Spent
tagesschau.de/	244 ms
www.tagesschau.de/	0.0 ms

●Time to Interactive 2.1 s

●Max Potential First Input Delay 90 ms

●Layout shift culprits

●Optimize DOM size

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Avoids enormous network payloads Total size was 1,980 KiB

●JavaScript execution time 0.6 s

●Minimizes main-thread work 1.4 s

●Avoid long main-thread tasks 2 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 30 ms

●Server Backend Latencies 100 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 20 ms

●Avoid large layout shifts 1 layout shift found

○INP breakdown

○User Timing marks and measures

○Avoid non-composited animations

Accessibility

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

ARIA

ARIA roles must have valid values in order to perform their intended accessibility functions. Learn more about valid ARIA roles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Player: video tagesschau24 im Livestream LIVESTREAM ARD-Programm Die Nachrich… `div.columns > div.v-instance > div.carousel > div.swiper`
Polizeianwärter werfen bei einer Vereidigungsfeier der Polizei Nordrhein-Westfa… `div > div#galerie-XWI1CFCH91 > div.carousel > div.swiper`

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

Contrast

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
LIVESTREAM `div.teaser-slider__teaserinfo > p.teaser-slider__topline-container > span.label > strong`
Neueste Nachrichten `ul.buttongroup > li.buttongroup__item > a.btn > span.btn__label`
LIVEBLOG `div.teaser__head > div.teaser__label > span.label > strong`
15.04.2026 • 22:15 Uhr `div.teaser-xs__teaserheadline > a.teaser-xs__link > p.teaser-xs__topline-container > span.teaser-xs__date`
15.04.2026 • 21:30 Uhr `div.teaser-xs__teaserheadline > a.teaser-xs__link > p.teaser-xs__topline-container > span.teaser-xs__date`
15.04.2026 • 20:00 Uhr `div.teaser-xs__teaserheadline > a.teaser-xs__link > p.teaser-xs__topline-container > span.teaser-xs__date`
16.04.2026 • 00:10 Uhr `div.teaser-xs__teaserheadline > a.teaser-xs__link > p.teaser-xs__topline-container > span.teaser-xs__date`
15.04.2026 • 19:00 Uhr `div.teaser-xs__teaserheadline > a.teaser-xs__link > p.teaser-xs__topline-container > span.teaser-xs__date`
15.04.2026 • 20:00 Uhr `div.teaser-xs__teaserheadline > a.teaser-xs__link > p.teaser-xs__topline-container > span.teaser-xs__date`
LIVEBLOG `a.teaser-xs__link > p.teaser-xs__topline-container > span.label > strong`
© ARD-aktuell / tagesschau.de `body > div.global-wrapper > div.endline > div.endline__copyright`

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
Service tagesschau.de ARD Angebote Rundfunkanstalten `footer.footer > nav#footer > div.columns > dl.footer__navigation__descriptionlist`

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Names and labels

Screen reader users rely on frame titles to describe the contents of frames. Learn more about frame titles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.columns > div.spacing-top-s-plus > div.v-instance > iframe.embed `div.columns > div.spacing-top-s-plus > div.v-instance > iframe.embed`
div.columns > div.boersenteaser__embed__inner > div.v-instance > iframe.embed `div.columns > div.boersenteaser__embed__inner > div.v-instance > iframe.embed`
div.columns > div.boersenteaser__embed__inner > div.v-instance > iframe.embed `div.columns > div.boersenteaser__embed__inner > div.v-instance > iframe.embed`

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.

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
EU nach Abwahl Orbans Tschechien und Slowakei als neue Blockierer? `a.teaser__link > div.teaser__teaserinfo > div.teaser__head > h3.teaser__h3`

These are opportunities to improve keyboard navigation in your application.

○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

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

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

●Buttons have an accessible name

●Image elements have `[alt]` attributes

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

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

●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 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

●Touch targets have sufficient size and spacing.

●Skip links are focusable.

●Document has a main landmark.

●Deprecated ARIA roles were not used

○`[accesskey]` values are unique

○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

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

○ARIA IDs are unique

○No form fields have multiple labels

○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

○Input buttons have discernible text.

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

○Form elements have associated labels

○Links are distinguishable without relying on color.

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

○`<object>` elements have alternate text

○Select elements have associated label elements.

○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

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

○Identical links have the same purpose.

○Elements with visible text labels have matching accessible names.

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

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

Best Practices

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
The disableRemotePlayback attribute should be used in order to disable the default Cast integration instead of using -internal-media-controls-overlay-cast-button selector.	www.tagesschau.de/

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
sso.tagesschau.de/sso/token	`Failed to load resource: the server responded with a status of 403 ()`

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Map URL
www.tagesschau.de/resources/assets/modern-20c517e20810c30c1af7.bundle.js
www.tagesschau.de/resources/assets/9860-04797034dec49ec10d84.chunk.bundle.js
player.h-cdn.com/loader.js?customer=ard_de&no_conf=true&md5=933738-0acf1ad1	/loader.js?customer=ard_de&no_conf=true&md5=933738-0acf1a...
player.h-cdn.com/config.js?customer=ard_de&md5=62639-55349260	player.h-cdn.com/config.js?customer=ard_de&md5=62639-55349260&map=true

●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

○Redirects HTTP traffic to HTTPS

○Mitigate clickjacking with XFO or CSP

100

SEO

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

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Document has a meta description

●Page has successful HTTP status code

●Links have descriptive text

●Links are crawlable

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`