Lighthouse Desktop
· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.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.
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
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.
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.
Performance issues directly impact user engagement and conversion rates.
Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.
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.
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.
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
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Duration |
|---|---|---|
| /css/berlin_de/foxtrot/bundle/berlin_organization.css?_ts... | 52.3 KiB | 80 ms |
| www.berlin.de/css/berlin_de/foxtrot/bundle/portal.css?_ts=1776618899 | 17.8 KiB |
Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size
Performance issues directly impact user engagement and conversion rates.
| URL | Resource Size | Est Savings | |
|---|---|---|---|
Berliner Ensemble div.tile > div.image > div.image__image > img | www.berlin.de/binaries/asset/image_assets/8158745/ratio_4_3/1775650409/800x600/ | 172.4 KiB | 164.5 KiB |
Tram in Berlin article.modul-teaser > div.image > div.image__image > img | www.berlin.de/binaries/asset/image_assets/10251184/ratio_4_3/1773033398/800x600/ | 106.6 KiB | 94.6 KiB |
Brandenburger Tor div.tile > div.image > div.image__image > img | www.berlin.de/binaries/asset/image_assets/8215661/ratio_4_3/1760961406/800x600/ | 101.6 KiB | 93.7 KiB |
Kind mit Seifenblasen div.tile > div.image > div.image__image > img | www.berlin.de/binaries/asset/image_assets/8215538/ratio_4_3/1774260000/800x600/ | 100.5 KiB | 92.5 KiB |
Berlin Skyline article.modul-teaser > div.image > div.image__image > img | www.berlin.de/binaries/asset/image_assets/7103866/ratio_4_3/1668410283/800x600/ | 156.4 KiB | 78.3 KiB |
Flohmarkt der Komödie am Kurfürstendamm li > div.image > div.image__image > img | www.berlin.de/binaries/asset/image_assets/7732851/ratio_4_3/1776410119/800x600/ | 87.7 KiB | 74.7 KiB |
Neubau in Berlin article.modul-teaser > div.image > div.image__image > img | www.berlin.de/binaries/asset/image_assets/10242412/ratio_4_3/1772638804/800x600/ | 67.8 KiB | 57.4 KiB |
Zivile Verteidigung article.modul-teaser > div.image > div.image__image > img | www.berlin.de/binaries/asset/image_assets/10272949/ratio_4_3/1773932159/800x600/ | 62.3 KiB | 52.8 KiB |
Beratungsgespräch div.tile > div.image > div.image__image > img | www.berlin.de/binaries/asset/image_assets/8215610/ratio_4_3/1763987184/800x600/ | 56.9 KiB | 51.1 KiB |
Testbilder Startseite (2) li > div.image > div.image__image > img | www.berlin.de/binaries/asset/image_assets/8158625/ratio_4_3/1760961409/800x600/ | 57.8 KiB | 48.2 KiB |
Ausstellung (Symbolbild) li > div.image > div.image__image > img | www.berlin.de/binaries/asset/image_assets/10170166/ratio_4_3/1773048383/800x600/ | 52.9 KiB | 44.1 KiB |
Neubau article.modul-teaser > div.image > div.image__image > img | www.berlin.de/binaries/asset/image_assets/10272958/ratio_4_3/1773932395/800x600/ | 115.9 KiB | 37.8 KiB |
These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.
Diagnostics
Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| /css/berlin_de/foxtrot/bundle/berlin_organization.css?_ts... | 52.3 KiB | 11.3 KiB |
| www.berlin.de/css/berlin_de/foxtrot/bundle/portal.css?_ts=1776618899 | 17.8 KiB | 5.0 KiB |
| www.berlin.de/css/berlin_de/foxtrot/bundle/2047.chunk.css | 13.3 KiB | 2.3 KiB |
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| /css/berlin_de/foxtrot/bundle/berlin_organization.css?_ts... | 52.2 KiB | 42.8 KiB |
| www.berlin.de/css/berlin_de/foxtrot/bundle/portal.css?_ts=1776618899 | 17.7 KiB | 17.0 KiB |
| www.berlin.de/css/berlin_de/foxtrot/bundle/2047.chunk.css | 13.2 KiB | 13.1 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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| www.berlin.de/css/berlin_de/foxtrot/bundle/portal.js?1776618899 | 77.6 KiB | 53.5 KiB |
| www.berlin.de/css/berlin_de/foxtrot/bundle/berlin_organization.js?1776618899 | 66.0 KiB | 43.1 KiB |
| www.berlin.de/css/berlin_de/foxtrot/bundle/swiper.chunk.js | 40.1 KiB | 25.7 KiB |
Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
| URL | Time Spent |
|---|---|
| berlin.de/ | 215 ms |
| www.berlin.de/ | 0.0 ms |
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
© contrastwerkstatt - stock.adobe.com div.tile > div.image > div.image__overlay > p.image__copyright |
© dpa div.tile > div.image > div.image__overlay > p.image__copyright |
© dpa div.tile > div.image > div.image__overlay > p.image__copyright |
© dpa div.tile > div.image > div.image__overlay > p.image__copyright |
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
© dpa
Stärkung der Bezirke
Zukünftig werden alle Bezirksaufgaben direkt mit d… div#layout-grid__area--maincontent > div.modul-carousel > div.swiper-container > ul#swiper-wrapper-68eff9915621e8ac |
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Best Practices
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.
Performance issues directly impact user engagement and conversion rates.
hreflang links tell search engines what version of a page they should list in search results for a given language or region. Learn more about `hreflang`.
Performance issues directly impact user engagement and conversion rates.
head > link |
Format your HTML in a way that enables crawlers to better understand your app’s content.