Singapore · Singapore Completed: Apr 21, 2026 23:27 UTCMobile 375 × 812
Desktop 1440 × 900
Score: 78 / 100
Based on 8 categories, 0 sections
Fast site — your users get a smooth experience.
Several missing protections leave your users and data exposed.
Several issues make your site difficult for assistive technology users.
Well-optimized for search — your content is discoverable.
Solid infrastructure — fast server responses across the board.
Mostly compliant — a few items need attention.
Missing metadata means poor previews on social media and search.
Lean and efficient — low environmental impact per visit.
The overall score is a weighted average of individual category scores. Categories with more impact on user experience and security carry more weight.
Weights reflect general web best practices. Individual needs may differ.
Content-Security-Policy header is missing
Security gaps expose your site and users to attacks, eroding trust.
No Content-Security-Policy header found
Security gaps expose your site and users to attacks, eroding trust.
1 link(s) with no accessible text
Accessibility issues exclude users with disabilities — up to 15% of your potential audience.
is missing width/height — may cause layout shift
Performance issues directly impact user engagement and conversion rates.
Cross-Origin-Embedder-Policy header is missing
Security gaps expose your site and users to attacks, eroding trust.
High impact, low effort — start here.
High impact, requires investment.
Small gains, minimal effort.
Nothing in this quadrant — good news.
Low impact, high effort — do last.
Nothing in this quadrant — good news.
[](https://beavercheck.com/results/f1b5c9f9-5185-418a-bd76-74ab5c42ea6d)<a href="https://beavercheck.com/results/f1b5c9f9-5185-418a-bd76-74ab5c42ea6d"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Funi-koeln.de" alt="BeaverCheck Score"></a>https://beavercheck.com/badge?url=https%3A%2F%2Funi-koeln.deThis badge auto-updates with your latest scan result.
Your site performs reasonably well, but a few targeted fixes could meaningfully improve results. Your server takes 944ms to respond — every other performance metric inherits that delay. Addressing the critical issues below would have the most immediate impact on your user trust.
6 barrier(s) likely increasing bounce by ~18%.
No HSTS header
+1% bounceReturning visitors are briefly exposed to downgrade attacks on first request
Fix: Set Strict-Transport-Security: max-age=31536000; includeSubDomains
No Content-Security-Policy header
+1% bounceHigher XSS blast radius — one compromised script can exfiltrate the checkout form
Fix: Ship a reporting-only CSP first, then enforce once violations are clean
No Open Graph tags
+2% bounceLinks shared on LinkedIn / Slack / Facebook show bare URLs — referral clicks drop
Fix: Add og:title, og:description, og:image, og:url to the page head
No structured data
+2% bounceNo rich-result eligibility in Google — lower SERP CTR vs competitors with stars and prices
Fix: Add JSON-LD for your page type (Product, Article, FAQPage, LocalBusiness, …)
Content is hard to read
+2% bounceGraduate-level reading difficulty — limits the addressable audience for product or blog pages
Fix: Shorten sentences; replace jargon with plain language; target Flesch ease ≥60
34 broken link(s) on the page
+5% bounceClicks land on 404s — trust drops and the session often ends
Fix: Fix or remove the broken destinations surfaced on the Content tab
Preliminary CRO audit — each barrier links to the tab with detailed analysis.
€450 investment → €0.15/month returns + EUR 120,500,000 risk avoided
€450
5h · 5 findings
€0.15 /mo
~€1.80 / year
EUR 120,500,000
if kept compliant
€135 — in quick wins — start here for the fastest payback
Figures combine localized regulatory fine ceilings, search/conversion value priced against local CPC, and bandwidth waste estimates. Results depend on implementation quality and audience composition. Not legal or financial advice.
5.0 developer hours at €90/hr
Based on Germany rates (€90/hr)
Start here for the best return on investment
€10,041,667 / month at risk
~€120,500,002 / year if left unfixed
€120,500,000
+3 more
€0.15 /mo
2028.5 MB/mo × 0.074 EUR/GB
Compliance figures represent the statutory maximum fine for the most severe triggered category, capped per regulation — not the sum of per-finding penalties. Based on published regulatory fine ranges. This is not legal advice.
Unique monthly visitors from your analytics
Purchases, signups, or key actions
Optional — for revenue estimation
more engaged visitors from reduced bounce
Fix 3 critical issues to capture this value
Based on Google/Deloitte research ("Milliseconds Make Millions") showing a ~7% bounce rate increase per additional second of LCP above the 2.5s "Good" threshold.
Your site's LCP: → estimated after fixes.
These are estimates based on industry research — actual results vary
Your data stays in your browser — nothing is sent to our servers
Thanks for your feedback!
We'll use a cached audit if available, or offer to scan.
Industry-standard audits powered by Google Lighthouse.
Key metrics that affect user experience.
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.38 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.68 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.022
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.50 s
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
1.68 s
Audit breakdown by category with detailed findings.
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
Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.
Most users today run browsers that natively support ES6+, async/await, optional chaining, and the rest of modern JavaScript. Transpiling to ES5 'just in case' adds 20-40% to your bundle for no benefit. Configure your build to target a modern browserslist, or ship a differential bundle pair (modern + legacy) with the module/nomodule pattern.
Source: Google web.dev / Lighthouse
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.
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.
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.
| Request | Cache TTL | Transfer Size |
|---|---|---|
| matomo.rrz.uni-koeln.de/matomo.js | 3600.0 s | 21.9 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 | |
|---|---|---|---|
div#news-list > div.c-news__item > div.c-news__figure > img.c-news-__image div#news-list > div.c-news__item > div.c-news__figure > img.c-news-__image | /sites/uni/_processed_/7/8/csm_20260409_steinzeitrohstoff... | 206.0 KiB | 160.0 KiB |
div#news-list > div.c-news__item > div.c-news__figure > img.c-news-__image div#news-list > div.c-news__item > div.c-news__figure > img.c-news-__image | /sites/uni/_processed_/f/b/csm_20260410_younger_teleskop_... | 111.7 KiB | 65.7 KiB |
div#news-list > div.c-news__item > div.c-news__figure > img.c-news-__image div#news-list > div.c-news__item > div.c-news__figure > img.c-news-__image | /sites/uni/_processed_/f/0/csm_20260410_socco_teilen_haen... | 47.2 KiB | 27.2 KiB |
These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.
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 |
|---|---|---|
| /typo3conf/ext/uzk2025/Resources/Public/Css/main-nMPRa-sd... | 27.7 KiB | 23.3 KiB |
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 |
|---|---|---|
| /typo3conf/ext/uzk2025/Resources/Public/Css/uzkerweiterun... | 4.1 KiB | 2.3 KiB |
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
Performance issues directly impact user engagement and conversion rates.
| Category | Time Spent |
|---|---|
| Other | 862 ms |
| Style & Layout | 785 ms |
| Rendering | 628 ms |
| Script Evaluation | 147 ms |
| Parse HTML & CSS | 87 ms |
| Script Parsing & Compilation | 23 ms |
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.
| URL | |
|---|---|
# div.c-page-header-main__inner > div.c-page-header-main__image-wrapper > picture > img.c-page-header-main__image | uni-koeln.de/sites/uni/_processed_/1/5/csm_global_south2_f0cc069941.jpg |
article.c-card > div.c-card__header > div.c-card__figure > img.c-news-teaser__image article.c-card > div.c-card__header > div.c-card__figure > img.c-news-teaser__image | |
article.c-card > div.c-card__header > div.c-card__figure > img.c-news-teaser__image article.c-card > div.c-card__header > div.c-card__figure > img.c-news-teaser__image | |
article.c-card > div.c-card__header > div.c-card__figure > img.c-news-teaser__image article.c-card > div.c-card__header > div.c-card__figure > img.c-news-teaser__image |
More information about the performance of your application. These numbers don't directly affect the Performance score.
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.
Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon |
div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon |
div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon |
div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon |
div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon |
div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon |
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.
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Medizinische Fakultät li > ul.c-footer__list > li > a |
Philosophische Fakultät li > ul.c-footer__list > li > a |
Zentrum für Lehrer*innenbildung (ZfL) li > ul.c-footer__list > li > a |
Adenauer School of Government (ASG) li > ul.c-footer__list > li > a |
Mensa li > ul.c-footer__list > li > a |
KLIPS 2.0 li > ul.c-footer__list > li > a |
Datenschutz nav.c-footer__legal > ul.c-footer__list > li.o-list-inline__item > a |
Impressum nav.c-footer__legal > ul.c-footer__list > li.o-list-inline__item > a |
These items highlight common accessibility best practices.
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.
Canonical links suggest which URL to show in search results. Learn more about canonical links.
Performance issues directly impact user engagement and conversion rates.
Format your HTML in a way that enables crawlers to better understand your app’s content.
Industry-standard audits powered by Google Lighthouse. — Desktop
Key metrics that affect user experience. — Desktop
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
374 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
434 ms
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.001
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
820 ms
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
436 ms
Audit breakdown by category with detailed findings.
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
Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.
Most users today run browsers that natively support ES6+, async/await, optional chaining, and the rest of modern JavaScript. Transpiling to ES5 'just in case' adds 20-40% to your bundle for no benefit. Configure your build to target a modern browserslist, or ship a differential bundle pair (modern + legacy) with the module/nomodule pattern.
Source: Google web.dev / Lighthouse
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.
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.
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.
| Request | Cache TTL | Transfer Size |
|---|---|---|
| matomo.rrz.uni-koeln.de/matomo.js | 3600.0 s | 21.9 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 | |
|---|---|---|---|
div#news-list > div.c-news__item > div.c-news__figure > img.c-news-__image div#news-list > div.c-news__item > div.c-news__figure > img.c-news-__image | /sites/uni/_processed_/7/8/csm_20260409_steinzeitrohstoff... | 206.0 KiB | 164.3 KiB |
Foto: Fünf lachende junge Menschen im Freien. div#c122773 > article.c-pattern-wrap > figure.c-icon > img.c-icon__image | /sites/uni/_processed_/a/f/csm_studierende_lachend_wiese_... | 111.1 KiB | 85.1 KiB |
div#news-list > div.c-news__item > div.c-news__figure > img.c-news-__image div#news-list > div.c-news__item > div.c-news__figure > img.c-news-__image | /sites/uni/_processed_/f/b/csm_20260410_younger_teleskop_... | 111.7 KiB | 70.0 KiB |
# div.c-page-header-main__inner > div.c-page-header-main__image-wrapper > picture > img.c-page-header-main__image | uni-koeln.de/sites/uni/_processed_/1/5/csm_global_south2_6f9039c95d.jpg | 78.2 KiB | 38.0 KiB |
div#news-list > div.c-news__item > div.c-news__figure > img.c-news-__image div#news-list > div.c-news__item > div.c-news__figure > img.c-news-__image | /sites/uni/_processed_/f/0/csm_20260410_socco_teilen_haen... | 47.2 KiB | 29.1 KiB |
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.
These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.
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 |
|---|---|---|
| /typo3conf/ext/uzk2025/Resources/Public/Css/uzkerweiterun... | 4.1 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 |
|---|---|---|
| /typo3conf/ext/uzk2025/Resources/Public/Css/main-nMPRa-sd... | 27.7 KiB | 22.5 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.
| URL | |
|---|---|
# div.c-page-header-main__inner > div.c-page-header-main__image-wrapper > picture > img.c-page-header-main__image | uni-koeln.de/sites/uni/_processed_/1/5/csm_global_south2_6f9039c95d.jpg |
article.c-card > div.c-card__header > div.c-card__figure > img.c-news-teaser__image article.c-card > div.c-card__header > div.c-card__figure > img.c-news-teaser__image | /fileadmin/_processed_/a/f/csm_uni-koeln-exzellente-forsc... |
article.c-card > div.c-card__header > div.c-card__figure > img.c-news-teaser__image article.c-card > div.c-card__header > div.c-card__figure > img.c-news-teaser__image | uni-koeln.de/sites/uni/_processed_/f/1/csm_teaser_Q3UzK_2025_55cd87f71b.png |
article.c-card > div.c-card__header > div.c-card__figure > img.c-news-teaser__image article.c-card > div.c-card__header > div.c-card__figure > img.c-news-teaser__image | /sites/uni/_processed_/9/6/csm_uni-koeln-fokusthema-nachh... |
More information about the performance of your application. These numbers don't directly affect the Performance score.
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.
Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon |
div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon |
div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon |
div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon |
div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon |
div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon div.c-footer__navigation > nav.c-footer__social > div.c-social-icon-wrapper > a.c-social-icon |
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.
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
Performance issues directly impact user engagement and conversion rates.
| Description |
|---|
Error: Template with id menu-layer-desktop- not found
at qe (https://uni-koeln.de/typo3conf/ext/uzk2025/Resources/Public/Js/main-8eAe4pPs.js:9:2609)
at s (https://uni-koeln.de/typo3conf/ext/uzk2025/Resources/Public/Js/main-8eAe4pPs.js:9:4140)
at Ie.n.length.window.injectMenuTemplate (https://uni-koeln.de/typo3conf/ext/uzk2025/Resources/Public/Js/main-8eAe4pPs.js:9:4467)
at O (https://uni-koeln.de/typo3conf/ext/uzk2025/Resources/Public/Js/main-8eAe4pPs.js:9:3168)
at async Ie (https://uni-koeln.de/typo3conf/ext/uzk2025/Resources/Public/Js/main-8eAe4pPs.js:9:4473) |
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.
Canonical links suggest which URL to show in search results. Learn more about canonical links.
Performance issues directly impact user engagement and conversion rates.
Format your HTML in a way that enables crawlers to better understand your app’s content.
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