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· 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.

31

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
/app-storefront/_next/static/chunks/app/[lang]/page-99195...0.0 ms464.0 KiB
www.deepl.com/app-storefront/_next/static/chunks/4794-c12605707d915675.js0.0 ms384.3 KiB
www.deepl.com/img/ai-labs/labs-cubes-v07.3.2-Green.mov.webm259200.0 s1.2 MiB
/img/home-experience/springEvent/Pulsating-Gradient-Shift...259200.0 s893.4 KiB
www.deepl.com/app-storefront/_next/static/chunks/8665-63687f707ea94980.js0.0 ms145.5 KiB
www.deepl.com/app-storefront/_next/static/chunks/47bf8baf-2489944084be743a.js0.0 ms112.2 KiB
www.deepl.com/app-storefront/_next/static/chunks/main-app-a21f1b297f05aae6.js0.0 ms96.4 KiB
www.deepl.com/app-storefront/_next/static/chunks/385c1f2e-4507f2b4ace5beac.js0.0 ms91.5 KiB
www.deepl.com/app-storefront/_next/static/chunks/c4d60bc3-95f295cc7ab305de.js0.0 ms89.9 KiB
www.deepl.com/app-storefront/_next/static/chunks/1dd3208c-db20bb1d8e3bcc9b.js0.0 ms78.2 KiB
www.deepl.com/app-storefront/_next/static/chunks/2122.03e36ee23dee24f6.js0.0 ms72.9 KiB
www.deepl.com/app-storefront/_next/static/css/b2defaef90d1b55e.css0.0 ms60.2 KiB
www.deepl.com/app-storefront/_next/static/chunks/99.10c07ae3ea065172.js0.0 ms50.6 KiB
www.deepl.com/app-storefront/_next/static/chunks/497b11cc-5a298aad01e0e783.js0.0 ms48.2 KiB
www.deepl.com/app-storefront/_next/static/chunks/6436.bcb23c3434438677.js0.0 ms42.8 KiB
www.deepl.com/app-storefront/_next/static/chunks/3ec1701d-b8ac6d1a505bf958.js0.0 ms41.1 KiB
www.deepl.com/app-storefront/_next/static/chunks/3413-92b6b50615abd59b.js0.0 ms40.0 KiB
www.deepl.com/app-storefront/_next/static/chunks/6189-2d594f1143731052.js0.0 ms32.6 KiB
www.deepl.com/img/home-experience/logo-cloud/logo-cloud-grayscale_v14.webp259200.0 s118.0 KiB
www.deepl.com/app-storefront/_next/static/chunks/670-9c0197ed20afdd0a.js0.0 ms20.5 KiB
www.deepl.com/app-storefront/_next/static/css/8dd694b0f29c81db.css0.0 ms19.1 KiB
www.deepl.com/app-storefront/_next/static/chunks/5904.514bfac5c80e25c5.js0.0 ms17.9 KiB
www.deepl.com/app-storefront/_next/static/chunks/2141-e8d6224b923cd6b3.js0.0 ms15.3 KiB
www.deepl.com/img/home-experience/platform/static/v3/2-deepl-voice.png259200.0 s72.1 KiB
www.deepl.com/app-storefront/_next/static/chunks/7013.86a306fc97680448.js0.0 ms13.9 KiB
www.deepl.com/app-storefront/_next/static/chunks/8213-1f67bd710fc484d6.js0.0 ms12.7 KiB
www.deepl.com/app-storefront/_next/static/chunks/5310-b961cc4eb443e9ca.js0.0 ms12.1 KiB
www.deepl.com/app-storefront/_next/static/css/6cb32dca228f58ba.css0.0 ms11.2 KiB
www.deepl.com/img/home-experience/platform/static/v3/1-deepl-translator.png259200.0 s53.8 KiB
www.deepl.com/app-storefront/_next/static/css/e1f4548f11d1028e.css0.0 ms10.4 KiB
www.deepl.com/img/home-experience/platform/static/v3/5-deepl-api.png259200.0 s48.7 KiB
/app-storefront/_next/static/chunks/app/[lang]/layout-c28...0.0 ms8.4 KiB
/img/home-experience/platform/static/v3/4-deepl-document-...259200.0 s35.5 KiB
www.deepl.com/app-storefront/_next/static/css/da5c3cf765f1cb71.css0.0 ms6.6 KiB
www.deepl.com/img/home-experience/platform/static/v3/3-deepl-write.png259200.0 s32.4 KiB
www.deepl.com/fonts/roboto-light.woff22419200.0 s63.4 KiB
www.deepl.com/fonts/roboto-medium.woff22419200.0 s63.2 KiB
/app-storefront/_next/static/chunks/late-productupdates.7...0.0 ms5.9 KiB
www.deepl.com/img/ai-labs/labs-cubes-v07.3.2-Green.mov.thumbnail.webp259200.0 s27.8 KiB
www.deepl.com/app-storefront/_next/static/chunks/webpack-d1be8a95265a13cd.js0.0 ms5.2 KiB
www.deepl.com/app-storefront/_next/static/chunks/5289-1f89316bce00b4d1.js0.0 ms4.7 KiB
www.deepl.com/fonts/roboto-regular.woff22419200.0 s48.7 KiB
www.deepl.com/app-storefront/_next/static/chunks/8489.996df9cfbf70a8fd.js0.0 ms4.6 KiB
www.deepl.com/img/home-experience/customer-stories/icon_paysend.webp259200.0 s22.1 KiB
/app-storefront/_next/static/chunks/app/global-error-a901...0.0 ms3.9 KiB
www.deepl.com/app-storefront/_next/static/chunks/6422-b2535adecdb643a9.js0.0 ms3.8 KiB
www.deepl.com/app-storefront/_next/static/css/45d9fab51ca09be2.css0.0 ms3.7 KiB
www.deepl.com/app-storefront/_next/static/css/b9c5a8bd2cb2df0c.css0.0 ms3.3 KiB
www.deepl.com/app-storefront/_next/static/chunks/1214.24f4e49eb922c62b.js0.0 ms2.6 KiB
/cdn-cgi/challenge-platform/h/g/d/9ed4fe160f3c44be/177636...0.0 ms2.1 KiB
www.deepl.com/app-storefront/_next/static/css/b4163a0b4b4da922.css0.0 ms1.7 KiB
www.deepl.com/app-storefront/_next/static/chunks/tracing.a3bce2108ddd61c6.js0.0 ms1.1 KiB
www.deepl.com/img/home-experience/customer-stories/icon_jae.webp259200.0 s3.8 KiB
www.deepl.com/img/home-experience/customer-stories/icon_kbc.webp259200.0 s2.8 KiB
www.deepl.com/img/home-experience/customer-stories/icon_db.webp259200.0 s2.3 KiB
www.deepl.com/img/logo/deepl-logo-text-blue.svg259200.0 s1.9 KiB
www.deepl.com/img/logo/deepl-logo-blue_24x24.svg259200.0 s1.3 KiB
www.deepl.com/img/logo/deepl-logo-blue.svg259200.0 s1.2 KiB
www.deepl.com/img/storefront_background.svg259200.0 s1.1 KiB
www.deepl.com/img/home-experience/platform/translator.svg259200.0 s1.0 KiB
challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/cmg/10.0 ms208 B
challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/cmg/10.0 ms208 B
www.deepl.com/img/home-experience/platform/write.svg259200.0 s983 B
www.deepl.com/img/home-experience/platform/api_2.svg259200.0 s942 B
www.deepl.com/img/home-experience/platform/voice.svg259200.0 s919 B
www.deepl.com/img/home-experience/platform/document.svg259200.0 s842 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.

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:61.508 source:map[column:113683 line:1 type:source-location url:https://www.deepl.com/app-storefront/_next/static/chunks/8665-63687f707ea94980.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:50.166 source:map[type:text value:[unattributed]]] map[reflowTime:3.637 source:map[column:10743 line:55 type:source-location url:https://www.deepl.com/app-storefront/_next/static/chunks/app/%5Blang%5D/page-9919593d7c97fa39.js urlProvider:network]] map[reflowTime:29.634 source:map[column:38016 line:140 type:source-location url:https://www.deepl.com/app-storefront/_next/static/chunks/app/%5Blang%5D/page-9919593d7c97fa39.js urlProvider:network]] map[reflowTime:8.008 source:map[column:4404 line:0 type:source-location url:https://www.deepl.com/app-storefront/_next/static/chunks/5310-b961cc4eb443e9ca.js urlProvider:network]] map[reflowTime:26.311 source:map[column:722432 line:0 type:source-location url:https://www.deepl.com/app-storefront/_next/static/chunks/4794-c12605707d915675.js urlProvider:network]] map[reflowTime:1.016 source:map[column:11901 line:0 type:source-location url:https://www.deepl.com/app-storefront/_next/static/chunks/5904.514bfac5c80e25c5.js urlProvider:network]] map[reflowTime:0.499 source:map[column:21971 line:0 type:source-location url:https://www.deepl.com/app-storefront/_next/static/chunks/5904.514bfac5c80e25c5.js urlProvider:network]] map[reflowTime:4.618 source:map[column:22592 line:62 type:source-location url:https://www.deepl.com/app-storefront/_next/static/chunks/app/%5Blang%5D/page-9919593d7c97fa39.js urlProvider:network]] map[reflowTime:29.682 source:map[column:22417 line:62 type:source-location url:https://www.deepl.com/app-storefront/_next/static/chunks/app/%5Blang%5D/page-9919593d7c97fa39.js urlProvider:network]] map[reflowTime:32.052 source:map[column:693379 line:0 type:source-location url:https://www.deepl.com/app-storefront/_next/static/chunks/4794-c12605707d915675.js urlProvider:network]] map[reflowTime:0.303 source:map[column:37027 line:140 type:source-location url:https://www.deepl.com/app-storefront/_next/static/chunks/app/%5Blang%5D/page-9919593d7c97fa39.js urlProvider:network]] map[reflowTime:3.994 source:map[column:947 line:0 type:source-location url:https://www.deepl.com/app-storefront/_next/static/chunks/1214.24f4e49eb922c62b.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
div.animatedLogoCloud_scroller__b69y9 > div.flex > div.h-100 > img.h-full div.animatedLogoCloud_scroller__b69y9 > div.flex > div.h-100 > img.h-full
www.deepl.com/img/home-experience/logo-cloud/logo-cloud-grayscale_v14.webp117.4 KiB98.6 KiB
//www_deepl_com/en/products/voice div.border-redesign-quartz-gray-100 > div.transition-all > div.relative > img.size-full
www.deepl.com/img/home-experience/platform/static/v3/2-deepl-voice.png71.6 KiB63.0 KiB
//www_deepl_com/en/products/translator div.border-redesign-quartz-gray-100 > div.transition-all > div.relative > img.size-full
www.deepl.com/img/home-experience/platform/static/v3/1-deepl-translator.png53.2 KiB44.7 KiB
//www_deepl_com/en/products/api div.border-redesign-quartz-gray-100 > div.transition-all > div.relative > img.size-full
www.deepl.com/img/home-experience/platform/static/v3/5-deepl-api.png48.2 KiB39.4 KiB
//www_deepl_com/en/features/document-translation div.border-redesign-quartz-gray-100 > div.transition-all > div.relative > img.size-full
/img/home-experience/platform/static/v3/4-deepl-document-...34.9 KiB26.7 KiB
//www_deepl_com/en/products/write div.border-redesign-quartz-gray-100 > div.transition-all > div.relative > img.size-full
www.deepl.com/img/home-experience/platform/static/v3/3-deepl-write.png31.8 KiB23.8 KiB
Paysend logo a.text-redesign-slate-gray-500 > div.flex > picture > img.h-12
www.deepl.com/img/home-experience/customer-stories/icon_paysend.webp21.6 KiB20.9 KiB
div.flex > div.h-40 > div.relative > video.object-cover div.flex > div.h-40 > div.relative > video.object-cover
www.deepl.com/img/ai-labs/labs-cubes-v07.3.2-Green.mov.thumbnail.webp27.3 KiB10.2 KiB

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
www.deepl.com/app-storefront/_next/static/css/b2defaef90d1b55e.css60.2 KiB514 ms
www.deepl.com/app-storefront/_next/static/css/6cb32dca228f58ba.css11.2 KiB350 ms
www.deepl.com/app-storefront/_next/static/css/b9c5a8bd2cb2df0c.css3.3 KiB309 ms
www.deepl.com/app-storefront/_next/static/css/8dd694b0f29c81db.css19.1 KiB391 ms
www.deepl.com/app-storefront/_next/static/css/e1f4548f11d1028e.css10.4 KiB269 ms
www.deepl.com/app-storefront/_next/static/css/da5c3cf765f1cb71.css6.6 KiB309 ms
www.deepl.com/app-storefront/_next/static/css/b4163a0b4b4da922.css1.7 KiB228 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: 879 ms
URLTime Spent
deepl.com/481 ms
www.deepl.com/398 ms
www.deepl.com/en0.0 ms

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.

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 40 ms 52.3 KiB
URLTransfer SizeEst Savings
www.deepl.com/app-storefront/_next/static/css/b2defaef90d1b55e.css59.7 KiB52.3 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: 280 ms 517.1 KiB
URLTransfer SizeEst Savings
gtm.deepl.com/gtm.js?id=GTM-5F5PGZ5P218.7 KiB107.5 KiB
www.deepl.com/app-storefront/_next/static/chunks/47bf8baf-2489944084be743a.js111.7 KiB73.1 KiB
www.deepl.com/app-storefront/_next/static/chunks/2122.03e36ee23dee24f6.js72.5 KiB60.1 KiB
www.deepl.com/app-storefront/_next/static/chunks/4794-c12605707d915675.js382.3 KiB60.0 KiB
www.deepl.com/app-storefront/_next/static/chunks/8665-63687f707ea94980.js145.0 KiB52.7 KiB
/app-storefront/_next/static/chunks/app/[lang]/page-99195...459.0 KiB51.6 KiB
www.deepl.com/app-storefront/_next/static/chunks/main-app-a21f1b297f05aae6.js95.9 KiB33.9 KiB
www.deepl.com/app-storefront/_next/static/chunks/99.10c07ae3ea065172.js50.0 KiB31.4 KiB
www.deepl.com/app-storefront/_next/static/chunks/6436.bcb23c3434438677.js40.6 KiB24.7 KiB
www.deepl.com/app-storefront/_next/static/chunks/3413-92b6b50615abd59b.js39.5 KiB22.2 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
Unattributable1.2 s24 ms0.0 ms
www.deepl.com/app-storefront/_next/static/chunks/47bf8baf-2489944084be743a.js1.2 s136 ms14 ms
www.deepl.com/app-storefront/_next/static/chunks/1dd3208c-db20bb1d8e3bcc9b.js1.1 s1.0 s7.6 ms
www.deepl.com/app-storefront/_next/static/chunks/8665-63687f707ea94980.js964 ms836 ms14 ms
www.deepl.com/en755 ms23 ms13 ms
www.deepl.com/app-storefront/_next/static/chunks/2122.03e36ee23dee24f6.js554 ms383 ms7.5 ms
www.deepl.com/app-storefront/_next/static/chunks/5904.514bfac5c80e25c5.js187 ms105 ms1.4 ms
www.deepl.com/app-storefront/_next/static/chunks/4794-c12605707d915675.js97 ms5.4 ms33 ms
gtm.deepl.com/gtm.js?id=GTM-5F5PGZ5P74 ms56 ms17 ms
/app-storefront/_next/static/chunks/app/[lang]/page-99195...73 ms2.7 ms69 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
Other2.8 s
Script Evaluation2.7 s
Style & Layout387 ms
Script Parsing & Compilation271 ms
Rendering102 ms
Garbage Collection84 ms
Parse HTML & CSS49 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
Pages that use WebXR are not currently eligible for back/forward cache.Actionable

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 19.7 KiB
URLTransfer SizeEst Savings
clearance.deepl.com/altcha.js29.6 KiB9.9 KiB
clearance.deepl.com/altcha.js29.6 KiB9.9 KiB

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.deepl.com/img/ai-labs/labs-cubes-v07.3.2-Green.mov.webm1.2 MiB
/img/home-experience/springEvent/Pulsating-Gradient-Shift...893.4 KiB
/app-storefront/_next/static/chunks/app/[lang]/page-99195...464.0 KiB
www.deepl.com/app-storefront/_next/static/chunks/4794-c12605707d915675.js384.3 KiB
/cdn-cgi/challenge-platform/h/g/flow/ov1/2665393735:17763...270.9 KiB
/cdn-cgi/challenge-platform/h/g/flow/ov1/2665393735:17763...254.5 KiB
gtm.deepl.com/gtm.js?id=GTM-5F5PGZ5P219.0 KiB
www.deepl.com/app-storefront/_next/static/chunks/8665-63687f707ea94980.js145.5 KiB
www.deepl.com/img/home-experience/logo-cloud/logo-cloud-grayscale_v14.webp118.0 KiB
www.deepl.com/en115.6 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
Logo Cloud div.animatedLogoCloud_scroller__b69y9 > div.flex > div.h-100 > img.h-full
www.deepl.com/img/home-experience/logo-cloud/logo-cloud-grayscale_v14.webp
div.animatedLogoCloud_scroller__b69y9 > div.flex > div.h-100 > img.h-full div.animatedLogoCloud_scroller__b69y9 > div.flex > div.h-100 > img.h-full
www.deepl.com/img/home-experience/logo-cloud/logo-cloud-grayscale_v14.webp
div.animatedLogoCloud_scroller__b69y9 > div.flex > div.h-100 > img.h-full div.animatedLogoCloud_scroller__b69y9 > div.flex > div.h-100 > img.h-full
www.deepl.com/img/home-experience/logo-cloud/logo-cloud-grayscale_v14.webp
div.animatedLogoCloud_scroller__b69y9 > div.flex > div.h-100 > img.h-full div.animatedLogoCloud_scroller__b69y9 > div.flex > div.h-100 > img.h-full
www.deepl.com/img/home-experience/logo-cloud/logo-cloud-grayscale_v14.webp
Paysend logo a.text-redesign-slate-gray-500 > div.flex > picture > img.h-12
www.deepl.com/img/home-experience/customer-stories/icon_paysend.webp
JAE logo a.text-redesign-slate-gray-500 > div.flex > picture > img.h-12
www.deepl.com/img/home-experience/customer-stories/icon_jae.webp
KBC logo a.text-redesign-slate-gray-500 > div.flex > picture > img.h-12
www.deepl.com/img/home-experience/customer-stories/icon_kbc.webp
DB logo a.text-redesign-slate-gray-500 > div.flex > picture > img.h-12
www.deepl.com/img/home-experience/customer-stories/icon_db.webp
cubes section.bg-redesign-amethyst-purple-200 > div.ctaSection_ctaSection__4CRbP > div.ctaSection_cubesContainer__df0ay > img.ltr:[transform:scaleX(1)]

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

●Layout shift culprits
●Optimize DOM size
●Font display
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Avoid long main-thread tasks 11 long tasks found
●Network Requests
●Network Round Trip Times 180 ms
●Server Backend Latencies 260 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 230 ms
●Avoid large layout shifts 2 layout shifts found
○INP breakdown
○LCP request discovery
○User Timing marks and measures
○Avoid non-composited animations
86

Accessibility

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

ARIA

Some ARIA parent roles must contain specific child roles to perform their intended accessibility functions. Learn more about roles and required children elements.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Logo Cloud section.bg-white > div > div.animatedLogoCloud_logoCloudWrapper__97Vcl > div.animatedLogoCloud_scroller__b69y9
Translator Voice Write Documents API section.bg-brand > div.px-redesign-6 > div.mt-redesign-8 > div.border-redesign-quartz-gray-100

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.

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
div.bg-[linear-gradient(259deg,#1FCF9A_7.9%,#EBE8FF_92.1%)] > div.px-[2rem] > div.flex > button.flex div.bg-[linear-gradient(259deg,#1FCF9A_7.9%,#EBE8FF_92.1%)] > div.px-[2rem] > div.flex > button.flex

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.

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
Close div#cookieBanner > div.flex > button#cookie-banner-lax-close-button > span.__content

These are opportunities to improve the legibility of your content.

Tables and lists

Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
70 million words securely translated each month with DeepL 30,000 glossary e… section.homeExperience_customerStories__yEkiB > div.py-redesign-8 > div.homeExperience__outerContainer > ul.homeExperience__scrollContainer
Windows logo div.flex > div.divide-brand > div.pb-4 > ul.grid
Chrome logo div.flex > div.divide-brand > div.pt-4 > ul.grid
Life sciences Manufacturing Legal Finance Government Retail section.homeExperience_industries__FHu4I > div.py-redesign-8 > div.homeExperience__outerContainer > ul.homeExperience__scrollContainer

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

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
Sign up for free div.flex > div.px-redesign-6 > div.flex > a.relative
○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]`s are contained by their required parent element
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Image elements have `[alt]` attributes
●Form elements have associated labels
●`[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
●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
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links are distinguishable without relying on color.
●Links have a discernible name
●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.
●`[lang]` attributes have a valid value
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●`<video>` elements contain a `<track>` element with `[kind="captions"]`
●Identical links have the same purpose.
○`[accesskey]` values are unique
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○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
○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.
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
100

Best Practices

General

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
/app-storefront/_next/static/chunks/app/[lang]/page-99195...
www.deepl.com/app-storefront/_next/static/chunks/4794-c12605707d915675.js
●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 browser errors logged to the console
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Ensure proper origin isolation with COOP
●Mitigate clickjacking with XFO or CSP
●Mitigate DOM-based XSS with Trusted Types
○Redirects HTTP traffic to HTTPS
○Use a strong HSTS policy
○Detected JavaScript libraries
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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.

Content Best Practices

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destinationLink Text
www.deepl.com/springlaunchLearn more
www.deepl.com/en/ai-labsLearn more

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

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Document has a meta description
●Page has successful HTTP status code
●Links are crawlable
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
○Document has a valid `rel=canonical`

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