C — https://tu-dresden.de | BeaverCheck Audit

Site Health

Score: 78 / 100

Based on 8 categories, 0 sections

Fast site — your users get a smooth experience.

Good foundation, but a few gaps could be exploited.

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.

Good content signals with minor gaps.

Reasonable footprint with room for optimization.

How is this calculated?

The overall score is a weighted average of individual category scores. Categories with more impact on user experience and security carry more weight.

Performance 25%Security 25%Accessibility 15%SEO 10%Infrastructure 10%Compliance 8%Content 5%Sustainability 2%

Weights reflect general web best practices. Individual needs may differ.

How the composite score is calculated

How you compare

Plone · 5 peers

You 78

Avg 73

At average

0 50 100

Better than 80% of Plone sites See full Plone benchmark →

Google Search Console · 2306 peers

You 78

Avg 73

At average

0 50 100

Better than 88% of Google Search Console sites See full Google Search Console benchmark →

Top Priorities (5)

1 control(s) without accessible label

Accessibility issues exclude users with disabilities — up to 15% of your potential audience.

Accessibility › Form Accessibility

2 button(s) with no accessible text

Accessibility issues exclude users with disabilities — up to 15% of your potential audience.

Accessibility › Link & Button Quality

2 link(s) with no accessible text

Accessibility issues exclude users with disabilities — up to 15% of your potential audience.

Accessibility › Link & Button Quality

Cross-Origin-Embedder-Policy header is missing

Security gaps expose your site and users to attacks, eroding trust.

Security › Security Headers

Cross-Origin-Opener-Policy header is missing

Security gaps expose your site and users to attacks, eroding trust.

Security › Security Headers

View fix priority matrix

Fix Priority Matrix

5 findings

Impact

Quick Wins

High impact, low effort — start here.

Strategic

High impact, requires investment.

Easy Improvements

Small gains, minimal effort.

Nothing in this quadrant — good news.

Deprioritize

Low impact, high effort — do last.

Nothing in this quadrant — good news.

← Low effort High effort →

Embed this badge

Markdown

[![BeaverCheck](https://beavercheck.com/badge?url=https%3A%2F%2Ftu-dresden.de)](https://beavercheck.com/results/d9c8304d-dda3-43a0-99ed-ddcbc03b6879)

HTML

<a href="https://beavercheck.com/results/d9c8304d-dda3-43a0-99ed-ddcbc03b6879"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Ftu-dresden.de" alt="BeaverCheck Score"></a>

Image URL

https://beavercheck.com/badge?url=https%3A%2F%2Ftu-dresden.de

This badge auto-updates with your latest scan result.

What fixing these means

Your site performs reasonably well, but a few targeted fixes could meaningfully improve results. Addressing the critical issues below would have the most immediate impact on your audience reach.

3 accessibility issues exclude users who rely on assistive technology.

2 security gaps detected — browsers may warn visitors about your site.

Conversion Barriers

2 critical 6 warning

8 barrier(s) likely increasing bounce by ~30%.

Speed (2)

Page takes 6.8s to load

+12% bounce

Users abandon at ~3s — you're 4.3s over the 2.5s threshold

Fix: Optimize render-blocking resources, preload the hero image, and compress images

High main-thread blocking time

+2% bounce

Page is non-interactive for 290ms after first paint

Fix: Defer third-party scripts and split large bundles

Trust (2)

No HSTS header

+1% bounce

Returning 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% bounce

Higher XSS blast radius — one compromised script can exfiltrate the checkout form

Fix: Ship a reporting-only CSP first, then enforce once violations are clean

Usability (1)

1 form field(s) without a label

+2% bounce

Screen readers skip unlabeled fields; autofill can't identify them; checkout abandonment spikes

Fix: Associate every input with a visible <label for="…">; add autocomplete attributes

Content (2)

No structured data

+2% bounce

No 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% bounce

Graduate-level reading difficulty — limits the addressable audience for product or blog pages

Fix: Shorten sentences; replace jargon with plain language; target Flesch ease ≥60

Navigation (1)

5 broken link(s) on the page

+5% bounce

Clicks 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.

Return on Investment

€495 investment → €3,978/month returns + EUR 120,500,000 risk avoided

Payback period: < 1 month First-year ROI: +9544%

Investment

€495

6h · 5 findings

Monthly returns

€3,978 /mo

~€47,736 / year

Conversions recovered €3,978
Bandwidth savings €0.35

Regulatory risk avoided

EUR 120,500,000

if kept compliant

ePrivacy Directive EUR 100,000,000
DSGVO EUR 20,000,000
EAA EUR 500,000

Payback period

0 12mo 24mo

€90 — 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.

Full methodology & sources

Estimated Remediation Cost

€495

5.5 developer hours at €90/hr

Based on Germany rates (€90/hr)

Quick wins

€90 2 fixes in ~60 minutes

Start here for the best return on investment

Cost by category

Cost by effort level

Adjust assumptions

Custom rate

€ /hr

Rates reflect fully-loaded developer cost including overhead

How developer rates are sourced

What Inaction Is Costing You

€10,041,667 / month at risk

~€120,500,004 / year if left unfixed

Compliance Risk

€120,500,000

ePrivacy DirectiveDSGVOEAA

No privacy policy link detected
DSGVO: EUR 10,000 – EUR 20,000,000
Trackers detected but no cookie policy found
DSGVO: EUR 5,000 – EUR 10,000,000
Trackers detected but no cookie policy found
DSGVO: EUR 10,000 – EUR 20,000,000

+5 more

Bandwidth Waste

€0.35 /mo

4696.6 MB/mo × 0.074 EUR/GB

Optimize transfer: save ~470 KB per page load
Saves €0.35/mo

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.

Compliance methodology · SEO assumptions · Bandwidth model

Your performance is already good — improvements may show diminishing returns

Monthly visitors

Unique monthly visitors from your analytics

Conversion rate (%)

Purchases, signups, or key actions

Avg. order value

Optional — for revenue estimation

additional conversions/month

more engaged visitors from reduced bounce

potential monthly revenue

Current bounce (est.)

After fixes (est.)

Estimated bounce reduction

Fix 3 critical issues to capture this value

How this is calculated

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

Bounce-rate model & assumptions

Your data stays in your browser — nothing is sent to our servers

Was this report useful?

Thanks for your feedback!

We'll use a cached audit if available, or offer to scan.

Checking for existing audit...

Press ? for shortcuts

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse.

Performance

Accessibility

Best Practices

100

SEO

Core Web Vitals

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.

3.21 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

6.80 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

290 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.

5.04 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.

6.86 s

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.

Learn more ▾

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.

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.

URL	Est Savings
tu-dresden.de/++theme++tud.theme.webcms2/fonts/OpenSans/opensans-light.woff2	1.6 s
tu-dresden.de/++theme++tud.theme.webcms2/fonts/OpenSans/opensans-semibold.woff2	1.5 s
tu-dresden.de/++theme++tud.theme.webcms2/fonts/tud-icons.woff?6886	1.5 s
tu-dresden.de/++theme++tud.theme.webcms2/fonts/OpenSans/opensans-bold.woff2	1.4 s
tu-dresden.de/++theme++tud.theme.webcms2/fonts/OpenSans/opensans-regular.woff2	1.4 s

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:32.632 source:map[column:47 line:1451 type:source-location url:https://tu-dresden.de/++plone++production/++unique++2026-03-30T14:52:00.121084/default.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:1.36 source:map[column:95000 line:1 type:source-location url:https://tu-dresden.de/++plone++production/++unique++2026-03-30T14:52:00.121084/default.js urlProvider:network]] map[reflowTime:0.436 source:map[column:1141 line:1 type:source-location url:https://tu-dresden.de/++plone++production/++unique++2026-03-30T14:52:00.121084/default.js urlProvider:network]] map[reflowTime:0.242 source:map[column:1224 line:1 type:source-location url:https://tu-dresden.de/++plone++production/++unique++2026-03-30T14:52:00.121084/default.js urlProvider:network]] map[reflowTime:2.73 source:map[column:242053 line:2888 type:source-location url:https://tu-dresden.de/++plone++production/++unique++2026-03-30T14:52:00.121084/default.js urlProvider:network]] map[reflowTime:3.707 source:map[column:67195 line:2888 type:source-location url:https://tu-dresden.de/++plone++production/++unique++2026-03-30T14:52:00.121084/default.js urlProvider:network]] map[reflowTime:13.704 source:map[column:25023 line:1 type:source-location url:https://tu-dresden.de/++plone++production/++unique++2026-03-30T14:52:00.121084/default.js urlProvider:network]] map[reflowTime:8.353 source:map[column:94978 line:1 type:source-location url:https://tu-dresden.de/++plone++production/++unique++2026-03-30T14:52:00.121084/default.js urlProvider:network]] map[reflowTime:1.228 source:map[column:257018 line:2888 type:source-location url:https://tu-dresden.de/++plone++production/++unique++2026-03-30T14:52:00.121084/default.js urlProvider:network]] map[reflowTime:0.32 source:map[column:248363 line:2888 type:source-location url:https://tu-dresden.de/++plone++production/++unique++2026-03-30T14:52:00.121084/default.js urlProvider:network]] map[reflowTime:0.552 source:map[column:248527 line:2888 type:source-location url:https://tu-dresden.de/++plone++production/++unique++2026-03-30T14:52:00.121084/default.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.

	URL	Resource Size	Est Savings
eine Baustelle der Zukunft: vernetzte Geräte wie Roboterarme, Kräne, Drohnen. m… `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/buehne/exzellenz/areas-of-excellence-c...	249.2 KiB	235.3 KiB
div.owl-item > div.teaser > div.teaser-bg > span.bg-picture-concrete `div.owl-item > div.teaser > div.teaser-bg > span.bg-picture-concrete`	/ressourcen/bilder/startseitenbanner/Mockup_4_TUD_ImageBr...	114.7 KiB	93.6 KiB
Oberflächen Exzitonen - ein gitterartiger Würfel aus Teilchen `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/buehne/exzellenz/bilder-der-exc/ct.qma...	58.4 KiB	44.5 KiB
div.columns > div.teaser > div.teaser-bg > span.bg-picture-concrete `div.columns > div.teaser > div.teaser-bg > span.bg-picture-concrete`	/ressourcen/bilder/campus-navigator-placeit.jpg/@@images/...	61.8 KiB	40.7 KiB
Exzellenzcluster PoL `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/buehne/exzellenz/bilder-der-exc/pol/19...	46.5 KiB	32.6 KiB
div.owl-item > div.teaser > div.teaser-bg > span.bg-picture-concrete `div.owl-item > div.teaser > div.teaser-bg > span.bg-picture-concrete`	/tu-dresden/exzellenz/ressourcen/bilder/film-we-are/120_f...	52.2 KiB	31.1 KiB
ein Dirigent steht neben drei Menschengroßen Roboterarmen, jeder mit einemTakts… `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/buehne/exzellenz/roboter-sinfonie/@@im...	42.2 KiB	28.3 KiB
VIsualisierung des Phasenübergangs bei Solarzellen `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/buehne/exzellenz/rec2_pixelwg_Joerg-Ba...	40.9 KiB	26.9 KiB
Foto von Mohamed Elgendy. `div.teaser-image > span.picture-element > picture > img`	/med/mf/ressourcen/bilder/news/2026/Mi2.jpg/@@images/09ef...	39.3 KiB	25.3 KiB
Photo: A person with blonde hair points at a screen displaying a geometric diag… `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/startseite/Stills-00_00_00_02-Still003...	34.9 KiB	13.8 KiB
div.columns > div.teaser > div.teaser-bg > span.bg-picture-concrete `div.columns > div.teaser > div.teaser-bg > span.bg-picture-concrete`	/ressourcen/bilder/startseite/2026_Exzellenz-Header_final...	36.3 KiB	12.8 KiB
Logo of the Service Center Studies. Big S green, big C orange, big S blue, behi… `div.media-container > figure.media > span.picture-element > img`	/ressourcen/bilder/startseite/Logo_SCS_bunt.png/@@images/...	18.8 KiB	11.5 KiB
Bildcollage mit einem Porträtfoto von Juniorprofessorin Dorit Brixius und einem… `div.teaser-image > span.picture-element > picture > img`	/tu-dresden/newsportal/ressourcen/bilder/news-bilder/foto...	30.2 KiB	9.1 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-9-IMG

nodeLabel: Photo: A person with blonde hair points at a screen displaying a geometric diag…

path: 1,HTML,1,BODY,1,DIV,4,MAIN,1,SECTION,1,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,A,0,DIV,0,SPAN,0,PICTURE,1,IMG

selector: div.teaser-image > span.picture-element > picture > img

snippet: <img alt="Photo: A person with blonde hair points at a screen displaying a geometric…" src="https://tu-dresden.de/ressourcen/bilder/startseite/Stills-00_00_00_02-Stil…">

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.

URL	Transfer Size	Duration
/++plone++production/++unique++2026-03-30T14:52:00.121084...	202.5 KiB	900 ms
/++plone++static/++unique++2024-11-11 23:39:45.815496/plo...	1.1 KiB	150 ms
/++plone++static/++unique++2024-11-11 23:39:45.815496/plo...	3.6 KiB
tu-dresden.de/++theme++tud.theme.webcms2/css/common.css?version=None	58.9 KiB	300 ms
/++plone++production/++unique++2026-03-30T14:52:00.121084...	1.9 KiB

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Request	Cache TTL	Transfer Size
tu-dresden.de/startseite/video-fuer-studieninteressierte/@@preview	3600.0 s	115.5 KiB
/ressourcen/bilder/startseite/2026_Exzellenz-Header_final...	3600.0 s	36.8 KiB
tu-dresden.de/++theme++tud.theme.webcms2/css/common.css?version=None	86400.0 s	58.9 KiB
tu-dresden.de/++theme++tud.theme.webcms2/fonts/tud-icons.woff?6886	86400.0 s	43.0 KiB
tu-dresden.de/++theme++tud.theme.webcms2/fonts/OpenSans/opensans-light.woff2	86400.0 s	17.9 KiB
tu-dresden.de/++theme++tud.theme.webcms2/fonts/OpenSans/opensans-semibold.woff2	86400.0 s	17.7 KiB
tu-dresden.de/++theme++tud.theme.webcms2/fonts/OpenSans/opensans-bold.woff2	86400.0 s	17.6 KiB
tu-dresden.de/++theme++tud.theme.webcms2/fonts/OpenSans/opensans-regular.woff2	86400.0 s	17.0 KiB
tu-dresden.de/++theme++tud.theme.webcms2/img/tud_claim_2025.svg	86400.0 s	13.6 KiB
tu-dresden.de/++theme++tud.theme.webcms2/img/eutopia-logo.svg	86400.0 s	11.1 KiB
tu-dresden.de/++theme++tud.theme.webcms2/img/tud-logo-white-en-2025-v2.svg	86400.0 s	8.9 KiB
tu-dresden.de/++theme++tud.theme.webcms2/img/icons/video-overlay_youtube.svg	86400.0 s	3.5 KiB
tu-dresden.de/++theme++tud.theme.webcms2/img/sachsen-signet-gruen.svg	86400.0 s	2.9 KiB
tu-dresden.de/++plone++tud.addons.webcms/mockup/translate-catalog.js	86400.0 s	2.0 KiB
tu-dresden.de/++theme++tud.theme.webcms2/img/tud-logo-sliver.svg	86400.0 s	642 B

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

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

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 25.7 KiB

URL	Transfer Size	Est Savings
/++plone++production/++unique++2026-03-30T14:52:00.121084...	202.0 KiB	25.7 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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 300 ms 47.9 KiB

URL	Transfer Size	Est Savings
tu-dresden.de/++theme++tud.theme.webcms2/css/common.css?version=None	58.4 KiB	47.9 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

Multi-megabyte JavaScript bundles delay every interactive feature on the page.

Learn more ▾

This is the Lighthouse audit fired when too much JS is shipped relative to what executes. The fix isn't a config flag — it requires bundle analysis (webpack-bundle-analyzer, rollup-plugin-visualizer), splitting routes into chunks, lazy-loading off-screen components, and removing unused dependencies. Fundamentally different from minification: minifying reduces byte count, this reduces what's downloaded at all.

Source: Google web.dev / Lighthouse

Estimated savings: 450 ms 116.5 KiB

URL	Transfer Size	Est Savings
/++plone++production/++unique++2026-03-30T14:52:00.121084...	201.6 KiB	78.6 KiB
matomo.tu-dresden.de/matomo.js	66.4 KiB	37.9 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
Bildcollage mit einem Porträtfoto von Juniorprofessorin Dorit Brixius und einem… `div.teaser-image > span.picture-element > picture > img`	/tu-dresden/newsportal/ressourcen/bilder/news-bilder/foto...
Rendering of a GaAs-based semiconductor sample approximately 20 micrometers in … `div.teaser-image > span.picture-element > picture > img`	/tu-dresden/newsportal/ressourcen/bilder/news-bilder/foto...
Foto von Mohamed Elgendy. `div.teaser-image > span.picture-element > picture > img`	/med/mf/ressourcen/bilder/news/2026/Mi2.jpg/@@images/09ef...
Photo: A person with blonde hair points at a screen displaying a geometric diag… `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/startseite/Stills-00_00_00_02-Still003...
ein Dirigent steht neben drei Menschengroßen Roboterarmen, jeder mit einemTakts… `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/buehne/exzellenz/roboter-sinfonie/@@im...
VIsualisierung des Phasenübergangs bei Solarzellen `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/buehne/exzellenz/rec2_pixelwg_Joerg-Ba...
eine Baustelle der Zukunft: vernetzte Geräte wie Roboterarme, Kräne, Drohnen. m… `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/buehne/exzellenz/areas-of-excellence-c...
Oberflächen Exzitonen - ein gitterartiger Würfel aus Teilchen `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/buehne/exzellenz/bilder-der-exc/ct.qma...
Exzellenzcluster PoL `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/buehne/exzellenz/bilder-der-exc/pol/19...
Free State of Saxony modern coat of arms `div.row > div.row > div.columns > img`	tu-dresden.de/++theme++tud.theme.webcms2/img/sachsen-signet-gruen.svg
Logo: TUD Dresden University of Technology `div#portal-header > div#portal-logo > a > img.white`	tu-dresden.de/++theme++tud.theme.webcms2/img/tud-logo-white-en-2025-v2.svg
EUTOPIA Alliance of 10 European Universities homepage `div.row > div.columns > a > img`	tu-dresden.de/++theme++tud.theme.webcms2/img/eutopia-logo.svg
Trademark and Claim of TUD: TUD \| The Collaborative University - inventive. tra… `div.border > div.row > div.columns > img`	tu-dresden.de/++theme++tud.theme.webcms2/img/tud_claim_2025.svg

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

●Layout shift culprits

●Document request latency

●Optimize DOM size

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Avoids enormous network payloads Total size was 1,529 KiB

●JavaScript execution time 0.7 s

●Minimizes main-thread work 1.9 s

●Avoid long main-thread tasks 3 long tasks found

●Avoid non-composited animations 2 animated elements found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 40 ms

●Server Backend Latencies 800 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

●Initial server response time was short Root document took 40 ms

●Avoid large layout shifts 3 layout shifts found

○INP breakdown

○User Timing marks and measures

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
© TUD University of Excellence TUD has been one of Germany’s Universities of E… `section.content-teaser-box > div.row > div.columns > div.teaser-box`
APR 22 2026 Gewerbliche Schutzrechte in der Praxis - Teil II - Patentrecherch… `section.event-slider > div.row > div.columns > div.owl-carousel`
© AVANGA Filmproduktion VIDEO: WE ARE TUD MORE © CD BROCHURE: KNOWLEDGE FOR… `div.banner-box-background > div.row > div.columns > div.owl-carousel`

Focusable descendents within an `[aria-hidden="true"]` element prevent those interactive elements from being available to users of assistive technologies like screen readers. Learn how `aria-hidden` affects focusable elements.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Read more University of Excellence `div.owl-item > div.content-teaser-item > div.more-wrapper > a.more`

When an input field doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn more about input field labels.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
© TUD University of Excellence TUD has been one of Germany’s Universities of E… `section.content-teaser-box > div.row > div.columns > div.teaser-box`
APR 22 2026 Gewerbliche Schutzrechte in der Praxis - Teil II - Patentrecherch… `section.event-slider > div.row > div.columns > div.owl-carousel`
© AVANGA Filmproduktion VIDEO: WE ARE TUD MORE © CD BROCHURE: KNOWLEDGE FOR… `div.banner-box-background > div.row > div.columns > div.owl-carousel`

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

Contrast

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Read more `div.columns > div.more-wrapper > a.more > span.link-icon`
Read more `div.columns > div.more-wrapper > a.more > span.link-icon`
Read more `div.columns > div.more-wrapper > a.more > span.link-icon`
FACTS & FIGURES `div.row > div.columns > div.float-left > h1.box-title`

These are opportunities to improve the legibility of your content.

Names and labels

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.formatted > div.contact-block > p.tel > a.ms-text `div.formatted > div.contact-block > p.tel > a.ms-text`
div.formatted > div.contact-block > p > a.ms-m-href `div.formatted > div.contact-block > p > a.ms-m-href`

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
1 `div.columns > div.teaser-box > div.owl-dots > button.owl-dot`
2 `div.columns > div.teaser-box > div.owl-dots > button.owl-dot`
3 `div.columns > div.teaser-box > div.owl-dots > button.owl-dot`
4 `div.columns > div.teaser-box > div.owl-dots > button.owl-dot`
5 `div.columns > div.teaser-box > div.owl-dots > button.owl-dot`
6 `div.columns > div.teaser-box > div.owl-dots > button.owl-dot`
1 `div.columns > div.owl-carousel > div.owl-dots > button.owl-dot`
2 `div.columns > div.owl-carousel > div.owl-dots > button.owl-dot`
3 `div.columns > div.owl-carousel > div.owl-dots > button.owl-dot`
4 `div.columns > div.owl-carousel > div.owl-dots > button.owl-dot`
5 `div.columns > div.owl-carousel > div.owl-dots > button.owl-dot`
1 `div.columns > div.owl-carousel > div.owl-dots > button.owl-dot`
2 `div.columns > div.owl-carousel > div.owl-dots > button.owl-dot`

These items highlight common accessibility best practices.

○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

●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

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

●Document has a main landmark.

●Deprecated ARIA roles were not used

●Uses ARIA roles only on compatible elements

○`[accesskey]` values are unique

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

○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○`[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

○Input buttons have discernible text.

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

○Form elements have associated labels

○Links are distinguishable without relying on color.

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

○`<object>` elements have alternate text

○Select elements have associated label elements.

○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>`.

○All heading elements contain content.

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

○Identical links have the same purpose.

○Elements with visible text labels have matching accessible names.

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

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

Best Practices

General

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

Source	Description
/matomo.php?action_name=Technische%20Universit%C3%A4t%20D...	`Failed to load resource: the server responded with a status of 502 (Bad Gateway)`

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Map URL
/++plone++production/++unique++2026-03-30T14:52:00.121084...	/++plone++production/++unique++2026-03-30T14:52:00.121084...

●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`

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

Performance

Accessibility

Best Practices

100

SEO

Core Web Vitals

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.

1.07 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

1.82 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.

0.121

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

2.34 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.

1.84 s

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Why this matters

Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.

Learn more ▾

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]

items: [map[node:map[type:text value:Total] score:0.121052] map[node:map[boundingRect:map[bottom:1821 height:535 left:0 right:1350 top:1286 width:1350] lhId:page-14-SECTION nodeLabel:NEWS More News © Sven Ellger / TUD, J.Dünnhaupt Apr 13, 2026 Two TUD researcher… path:1,HTML,1,BODY,1,DIV,4,MAIN,2,SECTION selector:body.pace-done > div#body-wrapper > main#main > section.news-teaser snippet:<section class="news-teaser"> type:node] score:0.11081] map[node:map[boundingRect:map[bottom:1086 height:319 left:856 right:1154 top:767 width:298] lhId:page-15-DIV nodeLabel:Responsible Electronics Whether smartphones, laptops, or televisions – everyda… path:1,HTML,1,BODY,1,DIV,4,MAIN,1,SECTION,1,DIV,0,DIV,1,DIV,0,DIV,0,DIV,2,DIV,0,DIV,0,DIV,0,A,1,DIV selector:div.content-teaser-item > div.relative > a.teaser > div.teaser-content snippet:<div class="teaser-content"> type:node] score:0.010214] map[node:map[boundingRect:map[bottom:923 height:40 left:130 right:160 top:883 width:30] lhId:page-16-::before nodeLabel:div.columns > div#uuid-0c895cf3515a4dd3a8964310d131c75b > button.owl-prev > ::before path:1,HTML,1,BODY,1,DIV,4,MAIN,1,SECTION,1,DIV,0,DIV,0,DIV,0,BUTTON,0,::before selector:div.columns > div#uuid-0c895cf3515a4dd3a8964310d131c75b > button.owl-prev > ::before snippet:<::before> type:node] score:2.8e-05]]

items: [map[node:map[type:text value:Total] score:0.001157] map[node:map[boundingRect:map[bottom:454 height:260 left:130 right:442 top:194 width:312] lhId:page-18-DIV nodeLabel:We are collaborative. We are excellent! path:1,HTML,1,BODY,1,DIV,4,MAIN,0,DIV,1,SECTION,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV selector:div.columns > div.teaser > div.sp-teaser-content-wrapper > div.sp-teaser-content snippet:<div class="sp-teaser-content"> type:node] score:0.0005 subItems:map[items:[map[cause:Web font extra:map[type:url value:https://tu-dresden.de/++theme++tud.theme.webcms2/fonts/OpenSans/opensans-regular.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:454 height:260 left:130 right:442 top:194 width:312] lhId:page-18-DIV nodeLabel:We are collaborative. We are excellent! path:1,HTML,1,BODY,1,DIV,4,MAIN,0,DIV,1,SECTION,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV selector:div.columns > div.teaser > div.sp-teaser-content-wrapper > div.sp-teaser-content snippet:<div class="sp-teaser-content"> type:node] score:0.000443 subItems:map[items:[map[cause:Web font extra:map[type:url value:https://tu-dresden.de/++theme++tud.theme.webcms2/fonts/OpenSans/opensans-bold.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:53 height:41 left:705 right:1155 top:12 width:450] lhId:page-19-DIV nodeLabel:Information for EN Search path:1,HTML,1,BODY,1,DIV,2,HEADER,0,DIV,0,DIV,2,DIV selector:header#header > div.row > div#portal-header > div#variable-header-container snippet:<div id="variable-header-container" data-toggler="gofuax-toggler" data-animate="slide-in-right slide-out-right" data-close-on-click="true"> type:node] score:0.000214]]

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Est Savings
tu-dresden.de/++theme++tud.theme.webcms2/fonts/OpenSans/opensans-light.woff2	2.1 s
tu-dresden.de/++theme++tud.theme.webcms2/fonts/OpenSans/opensans-semibold.woff2	2.0 s
tu-dresden.de/++theme++tud.theme.webcms2/fonts/OpenSans/opensans-bold.woff2	1.9 s
tu-dresden.de/++theme++tud.theme.webcms2/fonts/tud-icons.woff?6886	1.9 s
tu-dresden.de/++theme++tud.theme.webcms2/fonts/OpenSans/opensans-regular.woff2	1.7 s

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Resource Size	Est Savings
div.owl-item > div.teaser > div.teaser-bg > span.bg-picture-concrete `div.owl-item > div.teaser > div.teaser-bg > span.bg-picture-concrete`	/ressourcen/bilder/startseitenbanner/Mockup_4_TUD_ImageBr...	114.7 KiB	93.6 KiB
eine Baustelle der Zukunft: vernetzte Geräte wie Roboterarme, Kräne, Drohnen. m… `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/buehne/exzellenz/areas-of-excellence-c...	101.4 KiB	93.1 KiB
div.columns > div.teaser > div.teaser-bg > span.bg-picture-concrete `div.columns > div.teaser > div.teaser-bg > span.bg-picture-concrete`	/ressourcen/bilder/startseite/2026_Exzellenz-Header_final...	128.4 KiB	34.7 KiB
div.owl-item > div.teaser > div.teaser-bg > span.bg-picture-concrete `div.owl-item > div.teaser > div.teaser-bg > span.bg-picture-concrete`	/tu-dresden/exzellenz/ressourcen/bilder/film-we-are/120_f...	52.2 KiB	31.1 KiB
Oberflächen Exzitonen - ein gitterartiger Würfel aus Teilchen `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/buehne/exzellenz/bilder-der-exc/ct.qma...	33.9 KiB	25.7 KiB
Foto von Mohamed Elgendy. `div.teaser-image > span.picture-element > picture > img`	/med/mf/ressourcen/bilder/news/2026/Mi2.jpg/@@images/508a...	28.8 KiB	20.6 KiB
Exzellenzcluster PoL `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/buehne/exzellenz/bilder-der-exc/pol/19...	27.8 KiB	19.6 KiB
div.columns > div.teaser > div.teaser-bg > span.bg-picture-concrete `div.columns > div.teaser > div.teaser-bg > span.bg-picture-concrete`	/ressourcen/bilder/campus-navigator-placeit.jpg/@@images/...	27.4 KiB	19.2 KiB
ein Dirigent steht neben drei Menschengroßen Roboterarmen, jeder mit einemTakts… `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/buehne/exzellenz/roboter-sinfonie/@@im...	26.4 KiB	18.1 KiB
Logo of the Service Center Studies. Big S green, big C orange, big S blue, behi… `div.media-container > figure.media > span.picture-element > img`	/ressourcen/bilder/startseite/Logo_SCS_bunt.png/@@images/...	18.8 KiB	11.6 KiB
VIsualisierung des Phasenübergangs bei Solarzellen `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/buehne/exzellenz/rec2_pixelwg_Joerg-Ba...	19.2 KiB	11.0 KiB
Photo: A person with blonde hair points at a screen displaying a geometric diag… `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/startseite/Stills-00_00_00_02-Still003...	18.6 KiB	10.4 KiB
Rendering of a GaAs-based semiconductor sample approximately 20 micrometers in … `div.teaser-image > span.picture-element > picture > img`	/tu-dresden/newsportal/ressourcen/bilder/news-bilder/foto...	16.0 KiB	7.8 KiB
Bildcollage mit einem Porträtfoto von Juniorprofessorin Dorit Brixius und einem… `div.teaser-image > span.picture-element > picture > img`	/tu-dresden/newsportal/ressourcen/bilder/news-bilder/foto...	14.8 KiB	6.6 KiB

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]

items: [map[duration:195.15 label:Time to first byte subpart:timeToFirstByte] map[duration:1551.107 label:Resource load delay subpart:resourceLoadDelay] map[duration:2795.661 label:Resource load duration subpart:resourceLoadDuration] map[duration:25.045 label:Element render delay subpart:elementRenderDelay]]

lhId: page-2-SPAN

nodeLabel: div.columns > div.teaser > div.teaser-bg > span.bg-picture-concrete

path: 1,HTML,1,BODY,1,DIV,4,MAIN,0,DIV,1,SECTION,0,DIV,0,DIV,0,DIV,0,DIV,0,SPAN

selector: div.columns > div.teaser > div.teaser-bg > span.bg-picture-concrete

snippet: <span style="background-image: url("https://tu-dresden.de/ressourcen/bilder/startseite/2…");" class="bg-picture-concrete bg-picture-l biggest" data-url="https://tu-dresden.de/ressourcen/bilder/startseite/2026_Exzellenz-Header_f…" data-alt="">

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-2-SPAN

nodeLabel: div.columns > div.teaser > div.teaser-bg > span.bg-picture-concrete

path: 1,HTML,1,BODY,1,DIV,4,MAIN,0,DIV,1,SECTION,0,DIV,0,DIV,0,DIV,0,DIV,0,SPAN

selector: div.columns > div.teaser > div.teaser-bg > span.bg-picture-concrete

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.

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.

URL	Transfer Size	Duration
/++plone++production/++unique++2026-03-30T14:52:00.121084...	202.5 KiB	160 ms
tu-dresden.de/++theme++tud.theme.webcms2/css/common.css?version=None	58.9 KiB	80 ms
/++plone++static/++unique++2024-11-11 23:39:45.815496/plo...	3.6 KiB
/++plone++static/++unique++2024-11-11 23:39:45.815496/plo...	1.1 KiB
/++plone++production/++unique++2026-03-30T14:52:00.121084...	1.9 KiB

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Request	Cache TTL	Transfer Size
/ressourcen/bilder/startseite/2026_Exzellenz-Header_final...	3600.0 s	129.0 KiB
tu-dresden.de/startseite/video-fuer-studieninteressierte/@@preview	3600.0 s	115.5 KiB
tu-dresden.de/++theme++tud.theme.webcms2/css/common.css?version=None	86400.0 s	58.9 KiB
tu-dresden.de/++theme++tud.theme.webcms2/fonts/tud-icons.woff?6886	86400.0 s	43.0 KiB
tu-dresden.de/++theme++tud.theme.webcms2/fonts/OpenSans/opensans-light.woff2	86400.0 s	17.9 KiB
tu-dresden.de/++theme++tud.theme.webcms2/fonts/OpenSans/opensans-semibold.woff2	86400.0 s	17.7 KiB
tu-dresden.de/++theme++tud.theme.webcms2/fonts/OpenSans/opensans-bold.woff2	86400.0 s	17.6 KiB
tu-dresden.de/++theme++tud.theme.webcms2/fonts/OpenSans/opensans-regular.woff2	86400.0 s	17.0 KiB
tu-dresden.de/++theme++tud.theme.webcms2/img/tud_claim_2025.svg	86400.0 s	13.6 KiB
tu-dresden.de/++theme++tud.theme.webcms2/img/eutopia-logo.svg	86400.0 s	11.1 KiB
tu-dresden.de/++theme++tud.theme.webcms2/img/tud-logo-white-en-2025-v2.svg	86400.0 s	8.9 KiB
tu-dresden.de/++theme++tud.theme.webcms2/img/icons/video-overlay_youtube.svg	86400.0 s	3.5 KiB
tu-dresden.de/++theme++tud.theme.webcms2/img/sachsen-signet-gruen.svg	86400.0 s	2.9 KiB
tu-dresden.de/++plone++tud.addons.webcms/mockup/translate-catalog.js	86400.0 s	2.0 KiB
tu-dresden.de/++theme++tud.theme.webcms2/img/tud-logo-sliver.svg	86400.0 s	643 B

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

Diagnostics

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 40 ms 47.5 KiB

URL	Transfer Size	Est Savings
tu-dresden.de/++theme++tud.theme.webcms2/css/common.css?version=None	58.4 KiB	47.5 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

Multi-megabyte JavaScript bundles delay every interactive feature on the page.

Learn more ▾

Source: Google web.dev / Lighthouse

Estimated savings: 120 ms 117.3 KiB

URL	Transfer Size	Est Savings
/++plone++production/++unique++2026-03-30T14:52:00.121084...	201.6 KiB	79.5 KiB
matomo.tu-dresden.de/matomo.js	66.4 KiB	37.9 KiB

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 25.7 KiB

URL	Transfer Size	Est Savings
/++plone++production/++unique++2026-03-30T14:52:00.121084...	202.0 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

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL
Free State of Saxony modern coat of arms `div.row > div.row > div.columns > img`	tu-dresden.de/++theme++tud.theme.webcms2/img/sachsen-signet-gruen.svg
Bildcollage mit einem Porträtfoto von Juniorprofessorin Dorit Brixius und einem… `div.teaser-image > span.picture-element > picture > img`	/tu-dresden/newsportal/ressourcen/bilder/news-bilder/foto...
Rendering of a GaAs-based semiconductor sample approximately 20 micrometers in … `div.teaser-image > span.picture-element > picture > img`	/tu-dresden/newsportal/ressourcen/bilder/news-bilder/foto...
Foto von Mohamed Elgendy. `div.teaser-image > span.picture-element > picture > img`	/med/mf/ressourcen/bilder/news/2026/Mi2.jpg/@@images/508a...
Photo: A person with blonde hair points at a screen displaying a geometric diag… `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/startseite/Stills-00_00_00_02-Still003...
ein Dirigent steht neben drei Menschengroßen Roboterarmen, jeder mit einemTakts… `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/buehne/exzellenz/roboter-sinfonie/@@im...
VIsualisierung des Phasenübergangs bei Solarzellen `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/buehne/exzellenz/rec2_pixelwg_Joerg-Ba...
eine Baustelle der Zukunft: vernetzte Geräte wie Roboterarme, Kräne, Drohnen. m… `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/buehne/exzellenz/areas-of-excellence-c...
Oberflächen Exzitonen - ein gitterartiger Würfel aus Teilchen `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/buehne/exzellenz/bilder-der-exc/ct.qma...
Exzellenzcluster PoL `div.teaser-image > span.picture-element > picture > img`	/ressourcen/bilder/buehne/exzellenz/bilder-der-exc/pol/19...
Logo: TUD Dresden University of Technology `div#portal-header > div#portal-logo > a > img.white`	tu-dresden.de/++theme++tud.theme.webcms2/img/tud-logo-white-en-2025-v2.svg
EUTOPIA Alliance of 10 European Universities homepage `div.row > div.columns > a > img`	tu-dresden.de/++theme++tud.theme.webcms2/img/eutopia-logo.svg
Trademark and Claim of TUD: TUD \| The Collaborative University - inventive. tra… `div.border > div.row > div.columns > img`	tu-dresden.de/++theme++tud.theme.webcms2/img/tud_claim_2025.svg

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

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

Element	Layout shift score
NEWS More News © Sven Ellger / TUD, J.Dünnhaupt Apr 13, 2026 Two TUD researcher… `body.pace-done > div#body-wrapper > main#main > section.news-teaser`	0.111
Responsible Electronics Whether smartphones, laptops, or televisions – everyda… `div.content-teaser-item > div.relative > a.teaser > div.teaser-content`	0.010
We are collaborative. We are excellent! `div.columns > div.teaser > div.sp-teaser-content-wrapper > div.sp-teaser-content`	0.001
We are collaborative. We are excellent! `div.columns > div.teaser > div.sp-teaser-content-wrapper > div.sp-teaser-content`	0.000
Information for EN Search `header#header > div.row > div#portal-header > div#variable-header-container`	0.000
div.columns > div#uuid-0c895cf3515a4dd3a8964310d131c75b > button.owl-prev > ::before `div.columns > div#uuid-0c895cf3515a4dd3a8964310d131c75b > button.owl-prev > ::before`	0.000

●Time to Interactive 1.8 s

●Document request latency

●Optimize DOM size

●Forced reflow

●Modern HTTP

●Optimize viewport for mobile

●Max Potential First Input Delay 40 ms

●Minify CSS

●Avoids enormous network payloads Total size was 1,307 KiB

●JavaScript execution time 0.2 s

●Minimizes main-thread work 0.6 s

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 40 ms

●Server Backend Latencies 560 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

●Initial server response time was short Root document took 110 ms

○INP breakdown

○User Timing marks and measures

○Avoid long main-thread tasks

○Avoid non-composited animations

Accessibility

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
© TUD University of Excellence TUD has been one of Germany’s Universities of E… `section.content-teaser-box > div.row > div.columns > div.teaser-box`
APR 22 2026 Gewerbliche Schutzrechte in der Praxis - Teil II - Patentrecherch… `section.event-slider > div.row > div.columns > div.owl-carousel`
© AVANGA Filmproduktion VIDEO: WE ARE TUD MORE © CD BROCHURE: KNOWLEDGE FOR… `div.banner-box-background > div.row > div.columns > div.owl-carousel`

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Read more University of Excellence `div.owl-item > div.content-teaser-item > div.more-wrapper > a.more`
Read more Robotics of the future `div.owl-item > div.content-teaser-item > div.more-wrapper > a.more`
Read more Responsible Electronics `div.owl-item > div.content-teaser-item > div.more-wrapper > a.more`

When an input field doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn more about input field labels.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
© TUD University of Excellence TUD has been one of Germany’s Universities of E… `section.content-teaser-box > div.row > div.columns > div.teaser-box`
APR 22 2026 Gewerbliche Schutzrechte in der Praxis - Teil II - Patentrecherch… `section.event-slider > div.row > div.columns > div.owl-carousel`
© AVANGA Filmproduktion VIDEO: WE ARE TUD MORE © CD BROCHURE: KNOWLEDGE FOR… `div.banner-box-background > div.row > div.columns > div.owl-carousel`

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.formatted > div.contact-block > p.tel > a.ms-text `div.formatted > div.contact-block > p.tel > a.ms-text`
div.formatted > div.contact-block > p > a.ms-m-href `div.formatted > div.contact-block > p > a.ms-m-href`

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
1 `div.columns > div.teaser-box > div.owl-dots > button.owl-dot`
2 `div.columns > div.teaser-box > div.owl-dots > button.owl-dot`

These items highlight common accessibility best practices.

○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

●Background and foreground colors have a sufficient contrast ratio

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●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

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

●Document has a main landmark.

●Deprecated ARIA roles were not used

●Uses ARIA roles only on compatible elements

●Identical links have the same purpose.

●Elements with visible text labels have matching accessible names.

○`[accesskey]` values are unique

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

○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○`[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

○Input buttons have discernible text.

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

○Form elements have associated labels

○Links are distinguishable without relying on color.

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

○`<object>` elements have alternate text

○Select elements have associated label elements.

○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>`.

○All heading elements contain content.

○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.

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.

Source	Description
/matomo.php?action_name=Technische%20Universit%C3%A4t%20D...	`Failed to load resource: the server responded with a status of 502 (Bad Gateway)`

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Map URL
/++plone++production/++unique++2026-03-30T14:52:00.121084...	/++plone++production/++unique++2026-03-30T14:52:00.121084...

●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

○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`

Results for https://tu-dresden.de

Site Health

How you compare

Top Priorities (5)

Fix Priority Matrix

Quick Wins

Strategic

Easy Improvements

Deprioritize

What fixing these means

Conversion Barriers

Speed (2)

Trust (2)

Usability (1)

Content (2)

Navigation (1)

Return on Investment

Investment

Monthly returns

Regulatory risk avoided

Payback period

Estimated Remediation Cost

Cost by category

Cost by effort level

What Inaction Is Costing You

Compliance Risk

Bandwidth Waste

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

ARIA

Contrast

Names and labels

Best practices

Best Practices

General

SEO

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

ARIA

Names and labels

Best practices

Best Practices

General

SEO

Keyboard Shortcuts