Skip to content
https://deutschlandfunk.de

Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
SCORE
0
GRADE
FIX
0
REVIEW
0
PASS
0
INFO
0

Detailed Report

Audit breakdown by category with detailed findings.

52

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.deutschlandfunk.de/static/generated/deutschlandfunk/main.modern.js282.0 s669.8 KiB
www.deutschlandfunk.de/static/podlove-player/5.12.3/player/vendor.js284.0 s237.4 KiB
www.deutschlandfunk.de/static/generated/deutschlandfunk/player.dist.js282.0 s160.3 KiB
www.deutschlandfunk.de/static/podlove-player/5.12.3/player/styles.css284.0 s158.3 KiB
/09/a9/a1/19/09a9a119-3da9-4ad8-aba3-ac53954e997b/landtag...0.0 ms85.5 KiB
/10/6f/4b/6a/106f4b6a-0b98-4aa8-890e-9a014923901b/der-res...0.0 ms81.8 KiB
/c8/83/8a/e9/c8838ae9-e654-4fab-8f76-d8ca4691e880/fluecht...0.0 ms79.8 KiB
/92/94/88/1b/9294881b-5585-437e-a8c3-a1de16ecb7ea/bundesr...0.0 ms75.7 KiB
/23/ab/7f/22/23ab7f22-70cd-4190-a244-5c136f1f89c6/israel-...0.0 ms71.9 KiB
/66/f9/bc/91/66f9bc91-2e2b-4818-a74b-285075f45844/bundesw...0.0 ms65.6 KiB
/c4/f2/de/2c/c4f2de2c-e351-432f-b442-4ee2d46e6072/klimawa...0.0 ms61.0 KiB
/0a/6d/e8/56/0a6de856-c453-4c1b-b662-099fdbc8d991/serverr...0.0 ms59.6 KiB
/26/8d/ae/0e/268dae0e-14ab-47ef-9383-d5e2e99245ed/iaa-195...0.0 ms55.8 KiB
/63/15/f7/31/6315f731-8365-4cb2-b103-30522ca09ab5/haus-st...0.0 ms54.9 KiB
/53/95/4e/05/53954e05-2a06-442d-94a1-f36711712b98/kuba-bl...0.0 ms54.5 KiB
/18/ce/10/36/18ce1036-d9e7-4083-aa0d-5187b7a0f504/afd-dem...0.0 ms51.9 KiB
/37/22/0d/0a/37220d0a-bcc5-408d-bab9-0fa58e6efcc2/crashku...0.0 ms51.7 KiB
/c6/88/4c/aa/c6884caa-6695-40ca-97af-4ba888aaabfc/israel-...0.0 ms50.9 KiB
/9d/cc/1f/4c/9dcc1f4c-5efb-469a-9916-84c2753aa6f3/bundesk...0.0 ms50.0 KiB
/15/9d/63/11/159d6311-42be-4ef9-a824-ca0736523dd8/kanzler...0.0 ms49.5 KiB
/a3/be/a4/4b/a3bea44b-7137-46c4-8dbb-a1e30d2eb23e/niccol-...0.0 ms47.0 KiB
/3d/6b/b4/9b/3d6bb49b-af6f-4467-bcb6-87971fdd35c4/harvard...0.0 ms46.7 KiB
/8c/a3/4c/bc/8ca34cbc-c31c-4c78-8551-6535abd1717d/tatort-...0.0 ms45.2 KiB
/5a/91/df/06/5a91df06-7be4-4b5b-9070-08d0c1741a81/libanon...0.0 ms44.9 KiB
www.deutschlandfunk.de/static/fonts/Graphik-Semibold-Web.woff2283.0 s46.6 KiB
/a1/c7/13/0a/a1c7130a-a0c2-4f34-9d07-2ef8f742354e/iran-te...0.0 ms43.7 KiB
www.deutschlandfunk.de/static/podlove-player/5.12.3/player/styles.js284.0 s45.3 KiB
/34/46/69/d6/344669d6-1ea8-44b0-bda5-d1394ed12837/demo-we...0.0 ms42.4 KiB
www.deutschlandfunk.de/static/podlove-player/embed.js282.0 s43.3 KiB
/ad/35/e3/6a/ad35e36a-8d8c-463c-9066-63cdd2e8e943/krieg-u...0.0 ms41.3 KiB
/34/b1/f3/75/34b1f375-40e5-4fe4-be9e-70802cad32f5/imago85...0.0 ms39.7 KiB
/9d/aa/3a/9e/9daa3a9e-33a9-42ad-98d1-22956be7b5df/schwein...0.0 ms39.5 KiB
/60/74/fe/71/6074fe71-d57d-4429-aa72-f058d2ad4671/san-fra...0.0 ms39.4 KiB
/7a/b4/2e/1c/7ab42e1c-d095-48a7-8a41-409304f1b44a/ungarn-...0.0 ms38.3 KiB
/ad/f0/15/97/adf01597-9a97-4949-92bd-ae18519ae36b/seniore...0.0 ms38.2 KiB
/9f/d8/d7/e5/9fd8d7e5-a572-4e48-a7f6-d11051bcc200/james-s...0.0 ms37.9 KiB
/4b/9d/58/0b/4b9d580b-e8ea-4722-a423-160ab11d106d/donald-...0.0 ms37.4 KiB
/2d/d7/59/7a/2dd7597a-6c41-4840-8759-c5ba6df773e8/iran-kr...0.0 ms37.3 KiB
/02/b6/73/08/02b67308-ec35-4771-ae09-a8ff65a13807/papst-s...0.0 ms36.9 KiB
/60/a5/8b/a7/60a58ba7-a573-4bed-bbf4-bda2c13d02a2/port-su...0.0 ms36.8 KiB
www.deutschlandfunk.de/static/generated/deutschlandfunk/styles.css282.0 s38.0 KiB
/ad/60/80/69/ad608069-c3df-407b-8e8d-9033cce69fbf/hannah-...0.0 ms36.0 KiB
/cf/45/e2/31/cf45e231-f60d-4e66-baf4-03bb24fda5b7/kriegsg...0.0 ms35.6 KiB
/1e/59/17/aa/1e5917aa-ffa1-46df-aafb-9763d61c0477/aleksan...0.0 ms35.5 KiB
/2a/a6/b7/d6/2aa6b7d6-7d08-4916-8ea4-08db370f2bad/ticket-...0.0 ms34.8 KiB
/12/a4/47/b5/12a447b5-6a23-4ad7-bfbe-02ee4e260cf3/cyber-s...0.0 ms34.1 KiB
/b2/83/aa/87/b283aa87-8405-4510-9782-9c36b7b33acc/usa-sta...0.0 ms33.9 KiB
/02/02/6b/77/02026b77-9940-4c9e-987b-9bb6fa38c5e8/der-pol...0.0 ms33.9 KiB
/12/44/49/e1/124449e1-b08c-4e02-9e61-c1b54cd8e213/ns-wide...0.0 ms33.1 KiB
/a6/87/f0/8b/a687f08b-4df9-431c-a161-0125aa964988/lebensm...0.0 ms33.0 KiB
/a3/44/4c/b1/a3444cb1-bcde-49d1-a5b4-9e1b2d941835/magyar-...0.0 ms32.8 KiB
www.deutschlandfunk.de/static/fonts/Graphik-Medium-Web.woff2283.0 s33.0 KiB
/62/4c/d6/f9/624cd6f9-6081-43f8-8e1e-a1c2fe532030/digital...0.0 ms31.3 KiB
www.deutschlandfunk.de/static/fonts/Graphik-RegularItalic-Web.woff2283.0 s32.3 KiB
www.deutschlandfunk.de/static/podlove-player/5.12.3/player/bootstrap.js284.0 s32.0 KiB
/96/91/4a/ac/96914aac-35d5-4564-868c-f77fbc42f6a8/rene-pl...0.0 ms29.6 KiB
/ab/72/8e/1c/ab728e1c-69c3-43c9-9093-129da6a3bfdd/ohnmach...0.0 ms29.3 KiB
/cd/b4/71/f9/cdb471f9-fd34-4a64-847d-7f637a78abea/strasse...0.0 ms29.1 KiB
/6e/22/65/4f/6e22654f-35cc-4f0b-8a9d-3b6893a66cb1/demokra...0.0 ms28.9 KiB
www.deutschlandfunk.de/static/fonts/Graphik-Regular-Web.woff2283.0 s29.9 KiB
/c9/8b/cd/c0/c98bcdc0-e457-44b9-b70e-d83590fcd442/nigel-f...0.0 ms28.7 KiB
/d2/32/99/99/d2329999-e148-4c87-b7a3-3d2311744824/5781732...0.0 ms28.5 KiB
/42/7e/c2/08/427ec208-82a0-4ed7-98bb-bd2f5eac6413/ki-zuku...0.0 ms28.2 KiB
/2a/c5/1a/ee/2ac51aee-1872-4376-ab91-63e2a23e2b21/aktenst...0.0 ms28.1 KiB
/ca/f4/4c/80/caf44c80-8d44-4bbe-8aa0-c33c72b51a28/afd-sac...0.0 ms27.8 KiB
/23/9e/a5/c0/239ea5c0-f063-4b7d-ab09-90983f10601a/joseph-...0.0 ms27.2 KiB
/0e/41/63/99/0e416399-66e2-4311-869e-ede3a7617848/donald-...0.0 ms27.0 KiB
/7e/c9/1a/9a/7ec91a9a-8130-49a8-bbd1-5a1ac95600c1/katastr...0.0 ms26.9 KiB
/7d/bd/b9/fc/7dbdb9fc-90b0-4dbf-9a1c-fe367d3eee79/ki-vers...0.0 ms26.4 KiB
/cb/25/24/e5/cb2524e5-ac03-4bc5-9480-7f80383eda4c/kinder-...0.0 ms26.3 KiB
/83/0c/7d/e7/830c7de7-6134-4837-ae41-2affaf7755b6/deep-sc...0.0 ms25.7 KiB
/65/1b/a8/7c/651ba87c-00dc-4dbc-b228-d6bd00b9232e/die-pet...0.0 ms24.8 KiB
/21/c8/7b/6b/21c87b6b-e2ee-4f4a-be73-e5d92fe36c19/von-der...0.0 ms24.2 KiB
/c8/1a/b8/e6/c81ab8e6-7e4a-445c-b049-45862f78cf7f/luther-...0.0 ms23.3 KiB
/fc/9d/b3/14/fc9db314-cb25-4e80-abc6-50f058283083/imago85...0.0 ms23.1 KiB
/ae/92/26/50/ae922650-3080-4611-aa17-66b4be5735d9/riskant...0.0 ms23.0 KiB
/9e/31/ad/47/9e31ad47-4800-4a13-ac8a-1505ad56a27a/marie-l...0.0 ms22.9 KiB
/a5/a7/4c/43/a5a74c43-9e7e-4bc3-8397-e110727a33e8/suedame...0.0 ms22.1 KiB
/f2/4c/0b/01/f24c0b01-e7bc-4717-a88a-bf741ebe36bf/simone-...0.0 ms21.9 KiB
/20/a1/77/89/20a17789-17ee-4bf7-ac41-4a9ea6da0edb/amerika...0.0 ms21.6 KiB
/bd/9e/25/15/bd9e2515-dfc3-4239-afef-1e321d0aa088/podcast...0.0 ms21.1 KiB
/ad/75/c2/fb/ad75c2fb-a794-4ad7-8f41-621a0d91c820/weltord...0.0 ms20.5 KiB
/d1/67/86/2d/d167862d-111c-4928-a62d-81f3a4d87497/ulrike-...0.0 ms20.0 KiB
/ca/8a/12/0e/ca8a120e-3f69-4794-9ed6-5b47a11f6bd6/victor-...0.0 ms20.0 KiB
/d8/d4/1d/e9/d8d41de9-0470-429a-b7d9-6dad913927b6/eva-von...0.0 ms19.6 KiB
tag.aticdn.net/piano-analytics.js14400.0 s26.6 KiB
/f1/82/13/aa/f18213aa-c89c-4a1f-9435-830711494359/tiktok-...0.0 ms17.3 KiB
/63/08/17/26/63081726-43e7-49a7-811c-6051512201ec/kirche-...0.0 ms14.8 KiB
/7d/5f/95/93/7d5f9593-eee8-4eb6-aab3-c74e8ebfdb94/biometr...0.0 ms14.3 KiB
/24/55/e3/c3/2455e3c3-6a84-4bb8-94c4-6e7f2d882906/dark-ag...0.0 ms14.2 KiB
/40/74/e0/ed/4074e0ed-4657-4ae8-80d1-de461a8a067b/bulgari...0.0 ms13.8 KiB
www.deutschlandfunk.de/static/img/audio_player/placeholder_black_512x512.png900.0 s2.7 KiB
www.deutschlandfunk.de/static/podlove-player/variant-xl.js283.0 s1.3 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLEst Savings
www.deutschlandfunk.de/static/fonts/Graphik-Medium-Web.woff225 ms
www.deutschlandfunk.de/static/fonts/Graphik-Semibold-Web.woff210 ms
www.deutschlandfunk.de/static/fonts/Graphik-Regular-Web.woff25.0 ms
www.deutschlandfunk.de/static/fonts/Graphik-RegularItalic-Web.woff25.0 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:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:7.709 source:map[column:2.468964e+06 line:1 type:source-location url:https://www.deutschlandfunk.de/static/generated/deutschlandfunk/main.modern.js urlProvider:network]] map[reflowTime:29.591 source:map[column:2.476673e+06 line:1 type:source-location url:https://www.deutschlandfunk.de/static/generated/deutschlandfunk/main.modern.js urlProvider:network]] map[reflowTime:5.446 source:map[column:2.510016e+06 line:1 type:source-location url:https://www.deutschlandfunk.de/static/generated/deutschlandfunk/main.modern.js urlProvider:network]] map[reflowTime:0.393 source:map[column:2.477428e+06 line:1 type:source-location url:https://www.deutschlandfunk.de/static/generated/deutschlandfunk/main.modern.js urlProvider:network]]]

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
Wartende Flüchtlinge lagern an der griechisch-mazedonischen Grenze in unmittelb… article.navigation-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/c8/83/8a/e9/c8838ae9-e654-4fab-8f76-d8ca4691e880/fluecht...79.6 KiB74.3 KiB
Guido Kosmehl (FDP) steht im Plenarsaal vom Landtag von Sachsen-Anhalt am Redne… section.article-teaser-section > div.b-image > div.image-wrapper > img.internal-image
/09/a9/a1/19/09a9a119-3da9-4ad8-aba3-ac53954e997b/landtag...85.3 KiB72.6 KiB
Illustrative Grafik eines Tempels bei dem eine Säule droht umzustürzen article.news-carousel-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/10/6f/4b/6a/106f4b6a-0b98-4aa8-890e-9a014923901b/der-res...81.6 KiB71.6 KiB
Blick in den Plenarsaal durch eine spiegelnde Fensterscheibe. article.navigation-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/92/94/88/1b/9294881b-5585-437e-a8c3-a1de16ecb7ea/bundesr...75.5 KiB70.3 KiB
Zwei Soldaten der Bundeswehr, aufgenommen im Rahmen einer Bundeswehrübung 2022. article.navigation-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/66/f9/bc/91/66f9bc91-2e2b-4818-a74b-285075f45844/bundesw...65.4 KiB60.1 KiB
Grenze Israel-Libanon: Israelische Soldaten fahren im Südlibanon, vom Norden Is… a.b-thema-teaser > div.b-image > div.image-wrapper > img.internal-image
/23/ab/7f/22/23ab7f22-70cd-4190-a244-5c136f1f89c6/israel-...71.6 KiB59.0 KiB
Luftaufnahme eines Strandes in Australien. Durch die Färbung des Wassers und de… article.navigation-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/c4/f2/de/2c/c4f2de2c-e351-432f-b442-4ee2d46e6072/klimawa...60.8 KiB55.5 KiB
Berlin: Bundeskanzler Friedrich Merz (CDU) spricht beim Jahresempfang 75 Jahre … article.b-comment > div.b-image > div.image-wrapper > img.internal-image
/15/9d/63/11/159d6311-42be-4ef9-a824-ca0736523dd8/kanzler...49.3 KiB48.2 KiB
Ein Mann steht zwischen Häuserruinen article.navigation-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/c6/88/4c/aa/c6884caa-6695-40ca-97af-4ba888aaabfc/israel-...50.7 KiB45.7 KiB
Eine Straße mit Fußgängern in der Altstadt von Havanna während eines landesweit… article.news-carousel-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/53/95/4e/05/53954e05-2a06-442d-94a1-f36711712b98/kuba-bl...54.3 KiB44.3 KiB
Menschen mit Deutschlandflaggen und einem Transparent mit dem Schriftzug "Islam… article.news-carousel-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/18/ce/10/36/18ce1036-d9e7-4083-aa0d-5187b7a0f504/afd-dem...51.7 KiB41.8 KiB
Das Podcast-Logo zeigt einige Häuser, über denen ein Börsenkurs verläuft. Manch… article.news-carousel-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/37/22/0d/0a/37220d0a-bcc5-408d-bab9-0fa58e6efcc2/crashku...51.5 KiB41.6 KiB
Vor blauem Himmel steht in Teheran eine Werbetafel mit dem religiösen Führer de… article.navigation-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/a1/c7/13/0a/a1c7130a-a0c2-4f34-9d07-2ef8f742354e/iran-te...43.5 KiB39.2 KiB
Schatten von Soldaten vor einer blau-weißen Wand article.navigation-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/ad/35/e3/6a/ad35e36a-8d8c-463c-9066-63cdd2e8e943/krieg-u...41.1 KiB37.1 KiB
Blick auf das Bundeskanzleramt, davor die Spree section.article-teaser-section > div.b-image > div.image-wrapper > img.internal-image
/9d/cc/1f/4c/9dcc1f4c-5efb-469a-9916-84c2753aa6f3/bundesk...49.8 KiB35.4 KiB
Tatort Kunst: Eine Illustration des Bildes „Das Mädchen mit dem Perlenohrring“… article.news-carousel-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/8c/a3/4c/bc/8ca34cbc-c31c-4c78-8551-6535abd1717d/tatort-...45.0 KiB35.0 KiB
Zwei Menschen im Rentenalter sitzen auf einer Parkbank article.navigation-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/ad/f0/15/97/adf01597-9a97-4949-92bd-ae18519ae36b/seniore...38.1 KiB34.3 KiB
Die Europa-Abgeordnete Hannah Neumann von den Grünen bei einer Rede im Europapa… a.b-thema-teaser > div.b-image > div.image-wrapper > img.internal-image
/ad/60/80/69/ad608069-c3df-407b-8e8d-9033cce69fbf/hannah-...35.8 KiB33.7 KiB
Die Silhouette eines Mannes mit Cowboyhut hebt sich dunkel vor der US-amerikani… article.navigation-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/b2/83/aa/87/b283aa87-8405-4510-9782-9c36b7b33acc/usa-sta...33.7 KiB30.4 KiB
Péter Magyar tritt auf eine mit ungarischen sowie einer EU-Flagge geschmückte B… article.news-carousel-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/34/b1/f3/75/34b1f375-40e5-4fe4-be9e-70802cad32f5/imago85...39.5 KiB29.6 KiB
Donald Trump hält eine Bibel fest article.news-carousel-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/4b/9d/58/0b/4b9d580b-e8ea-4722-a423-160ab11d106d/donald-...37.2 KiB27.3 KiB
Eine Karte zeigt die Straße vom Hormus. a.b-thema-teaser > div.b-image > div.image-wrapper > img.internal-image
/cd/b4/71/f9/cdb471f9-fd34-4a64-847d-7f637a78abea/strasse...28.9 KiB27.2 KiB
Aleksandar Vučić jubelt auf einem Podium nach seinem Wahlsieg 2023 article.news-carousel-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/1e/59/17/aa/1e5917aa-ffa1-46df-aafb-9763d61c0477/aleksan...35.3 KiB26.0 KiB
Das Logo zeigt den Schriftzug "Der Politikpodcast" in einer Bildcollage mit der… article.news-carousel-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/02/02/6b/77/02026b77-9940-4c9e-987b-9bb6fa38c5e8/der-pol...33.7 KiB24.8 KiB
Nigel Farage steht an einem blauen Rednerpult mit der Aufschrift "Reform UK" un… section.article-teaser-section > div.b-image > div.image-wrapper > img.internal-image
/c9/8b/cd/c0/c98bcdc0-e457-44b9-b70e-d83590fcd442/nigel-f...28.5 KiB21.8 KiB
Ein deprimierter Mann, der sein Gesicht bedeckt und verzweifelt weint article.news-carousel-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/ab/72/8e/1c/ab728e1c-69c3-43c9-9093-129da6a3bfdd/ohnmach...29.1 KiB21.4 KiB
Dunkle Wolken ziehen über dem Berliner Reichstagsgebäude auf. article.news-carousel-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/6e/22/65/4f/6e22654f-35cc-4f0b-8a9d-3b6893a66cb1/demokra...28.8 KiB21.1 KiB
Großaufnahme von Donald Trump, hinter dem die Flaggen der USA und der NATO zu s… article.news-carousel-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/0e/41/63/99/0e416399-66e2-4311-869e-ede3a7617848/donald-...26.8 KiB19.7 KiB
Im Bild steht der Schriftzug "KI verstehen". Die Zeichnung zeigt einen stilisie… article.news-carousel-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/7d/bd/b9/fc/7dbdb9fc-90b0-4dbf-9a1c-fe367d3eee79/ki-vers...26.2 KiB19.3 KiB
Deep Science - Die Psychonauten. Die Podcast-Illustration zeigt in bunten, unna… article.news-carousel-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/83/0c/7d/e7/830c7de7-6134-4837-ae41-2affaf7755b6/deep-sc...25.5 KiB18.7 KiB
EU-Kommissionspräsidentin Ursula von der Leyen stehend vor einer EU-Fahne section.article-teaser-section > div.b-image > div.image-wrapper > img.internal-image
/21/c8/7b/6b/21c87b6b-e2ee-4f4a-be73-e5d92fe36c19/von-der...24.0 KiB18.4 KiB
Peter Thiel hält sich eine Hand halb vor sein Gesicht article.news-carousel-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/65/1b/a8/7c/651ba87c-00dc-4dbc-b228-d6bd00b9232e/die-pet...24.6 KiB18.1 KiB
Ein Hand hält ein Mobiltelefon auf dem der Chart des Ölpreises zu sehen ist, de… article.news-carousel-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/fc/9d/b3/14/fc9db314-cb25-4e80-abc6-50f058283083/imago85...22.9 KiB16.8 KiB
Eine Karte von Nord- und Südamerika vor dunklem Hintergrund mit ditialen Linien article.news-carousel-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/a5/a7/4c/43/a5a74c43-9e7e-4bc3-8397-e110727a33e8/suedame...21.9 KiB16.1 KiB
Der Historiker Volker Depkat article.news-carousel-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/20/a1/77/89/20a17789-17ee-4bf7-ac41-4a9ea6da0edb/amerika...21.4 KiB15.7 KiB
Collage einer Hand, die ein Smartphone hält. Auf dem Bildschirm sind immer weit… article.navigation-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/f1/82/13/aa/f18213aa-c89c-4a1f-9435-830711494359/tiktok-...17.1 KiB15.4 KiB
Das Podcastlogo von "Deutschlandfunk - Der Tag" zeigt den Schriftzug "Der Tag" … article.news-carousel-teaser-wrapper > div.b-image > div.image-wrapper > img.internal-image
/bd/9e/25/15/bd9e2515-dfc3-4239-afef-1e321d0aa088/podcast...20.9 KiB15.3 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-14-IMG
nodeLabel: Blick auf das Bundeskanzleramt, davor die Spree
path: 1,HTML,1,BODY,0,DIV,1,MAIN,0,SECTION,0,DIV,0,ARTICLE,1,ARTICLE,0,A,0,SECTION,0,DIV,0,DIV,0,IMG
selector: section.article-teaser-section > div.b-image > div.image-wrapper > img.internal-image
snippet: <img loading="lazy" class="internal-image" alt="Blick auf das Bundeskanzleramt, davor die Spree" src="https://bilder.deutschlandfunk.de/9d/cc/1f/4c/9dcc1f4c-5efb-469a-9916-84c2…" srcset="https://bilder.deutschlandfunk.de/9d/cc/1f/4c/9dcc1f4c-5efb-469a-9916-84c2…">

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
www.deutschlandfunk.de/static/generated/deutschlandfunk/styles.css38.0 KiB301 ms

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: 831 ms
URLTime Spent
deutschlandfunk.de/831 ms
www.deutschlandfunk.de/0.0 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

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: 150 ms 192.7 KiB
URLTransfer SizeEst Savings
www.deutschlandfunk.de/static/podlove-player/5.12.3/player/styles.css158.0 KiB158.0 KiB
www.deutschlandfunk.de/static/generated/deutschlandfunk/styles.css37.7 KiB34.8 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: 2.1 s 611.0 KiB
URLTransfer SizeEst Savings
www.deutschlandfunk.de/static/generated/deutschlandfunk/main.modern.js668.9 KiB311.2 KiB
www.deutschlandfunk.de/static/podlove-player/5.12.3/player/vendor.js237.1 KiB146.1 KiB
www.deutschlandfunk.de/static/generated/deutschlandfunk/player.dist.js160.0 KiB120.8 KiB
www.deutschlandfunk.de/static/podlove-player/5.12.3/player/styles.js44.9 KiB32.8 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
www.deutschlandfunk.de/static/generated/deutschlandfunk/main.modern.js1.4 s1.2 s8.4 ms
Unattributable676 ms10 ms0.0 ms
www.deutschlandfunk.de/603 ms36 ms4.8 ms
www.deutschlandfunk.de/static/podlove-player/5.12.3/player/bootstrap.js456 ms446 ms9.6 ms
www.deutschlandfunk.de/static/generated/deutschlandfunk/player.dist.js414 ms148 ms58 ms
www.deutschlandfunk.de/static/podlove-player/embed.js168 ms155 ms12 ms
www.deutschlandfunk.de/static/podlove-player/5.12.3/player/vendor.js68 ms15 ms52 ms
www.deutschlandfunk.de/static/podlove-player/5.12.3/player/styles.css67 ms0.0 ms0.0 ms
tag.aticdn.net/piano-analytics.js67 ms47 ms6.1 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 Evaluation2.0 s
Other890 ms
Style & Layout604 ms
Script Parsing & Compilation165 ms
Parse HTML & CSS159 ms
Rendering141 ms
Garbage Collection13 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
www.deutschlandfunk.de/static/generated/deutschlandfunk/main.modern.js669.8 KiB
www.deutschlandfunk.de/299.0 KiB
www.deutschlandfunk.de/static/podlove-player/5.12.3/player/vendor.js237.4 KiB
www.deutschlandfunk.de/static/generated/deutschlandfunk/player.dist.js160.3 KiB
www.deutschlandfunk.de/static/podlove-player/5.12.3/player/styles.css158.3 KiB
/09/a9/a1/19/09a9a119-3da9-4ad8-aba3-ac53954e997b/landtag...85.5 KiB
/10/6f/4b/6a/106f4b6a-0b98-4aa8-890e-9a014923901b/der-res...81.8 KiB
/c8/83/8a/e9/c8838ae9-e654-4fab-8f76-d8ca4691e880/fluecht...79.8 KiB
/92/94/88/1b/9294881b-5585-437e-a8c3-a1de16ecb7ea/bundesr...75.7 KiB
/23/ab/7f/22/23ab7f22-70cd-4190-a244-5c136f1f89c6/israel-...71.9 KiB

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

●Layout shift culprits
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●Avoid long main-thread tasks 13 long tasks found
●Image elements have explicit `width` and `height`
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 20 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 10 ms
●Avoid large layout shifts 2 layout shifts found
○INP breakdown
○User Timing marks and measures
○Avoid non-composited animations
87

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
Deutschlandradio © 2026 div#main-app > footer.b-footer > h3.footer-title > a.b-link

These are opportunities to improve the legibility of your content.

Names and labels

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.navigation-right-side > div.js-search > form#search-form > input.search-input div.navigation-right-side > div.js-search > form#search-form > input.search-input

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
ARD| nav.partner-nav > ul.b-list > li.list-item > a.b-link
ZDF| nav.partner-nav > ul.b-list > li.list-item > a.b-link
Phoenix| nav.partner-nav > ul.b-list > li.list-item > a.b-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
Hören  33:52 div.article-teaser-info > div.b-article-info > div.article-info-actions > button.b-button
Hören  27:08 div.article-teaser-info > div.b-article-info > div.article-info-actions > button.b-button
Hören  12:34 div.article-teaser-info > div.b-article-info > div.article-info-actions > button.b-button
Hören  11:54 div.article-teaser-info > div.b-article-info > div.article-info-actions > button.b-button
Hören  13:53 div.article-teaser-info > div.b-article-info > div.article-info-actions > button.b-button
Hören  31:48 div.article-teaser-info > div.b-article-info > div.article-info-actions > button.b-button
Hören  34:22 div.article-teaser-info > div.b-article-info > div.article-info-actions > button.b-button
Hören  05:09 div.article-teaser-info > div.b-article-info > div.article-info-actions > button.b-button
Hören  11:23 div.article-teaser-info > div.b-article-info > div.article-info-actions > button.b-button
Hören  18:38 div.article-teaser-info > div.b-article-info > div.article-info-actions > button.b-button
Hören  04:59 div.article-teaser-info > div.b-article-info > div.article-info-actions > button.b-button
○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
●`[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 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
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●All heading elements contain content.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○`[aria-hidden="true"]` elements do not contain focusable descendents
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
○`[role]`s are contained by their required parent element
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○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.
○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>`.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Identical links have the same purpose.
○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.
96

Best Practices

General

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.deutschlandfunk.de/static/generated/deutschlandfunk/main.modern.js line 1, col 3366197
Error: No options detected. Please consult documentation. at RI.publish (https://www.deutschlandfunk.de/static/generated/deutschlandfunk/main.modern.js:2:3366198) at https://www.deutschlandfunk.de/static/generated/deutschlandfunk/main.modern.js:2:3367574
www.deutschlandfunk.de/static/generated/deutschlandfunk/main.modern.js line 1, col 2626463
ESI Fragment already exists teaser-group-horizontal-item

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.

URLMap URL
www.deutschlandfunk.de/static/podlove-player/5.12.3/player/vendor.js
www.deutschlandfunk.de/static/generated/deutschlandfunk/player.dist.js
www.deutschlandfunk.de/static/generated/deutschlandfunk/main.modern.js
www.deutschlandfunk.de/www.deutschlandfunk.de/iframeResizer.contentWindow.map
●Uses HTTPS
●Avoids deprecated APIs
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No 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`

Send Feedback