uni-paderborn.de website review

38 files are served with short cache lifetimes, so returning visitors download them again (784 KiB).

10 files block the first paint until they finish downloading. Deferring or inlining them could save about 1.4 s.

Your mobile performance score is 69 (desktop: 92). Pages that score under 90 lose visitors before the first paint.

About 109 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 600 ms faster on a phone.

About 86 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 450 ms faster on a phone.

The page has 1,748 HTML elements. Above 1,500, rendering and every interaction get slower on phones.

2 images could be 153 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.

2 long tasks block the main thread while loading, the longest for 130 ms. During a long task the page ignores taps.

28 KiB JavaScript is shipped twice across bundles.

Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

Scripts make the browser recalculate the layout repeatedly while the page loads, which wastes processor time on phones.

Your largest element takes 5.9 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the image.

Visually, the page fills in at 5.7 s (Speed Index). Good is under 3.4 s.

The page becomes fully interactive after 5.9 s. Good is under 3.8 s.

The first text or image appears after 2.3 s on a phone. Good is under 1.8 s.

Over the last 25 four-week periods to 2026-10-24, real Chrome visitors' tap response (inp) went from 136 ms to 139 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Over the last 25 four-week periods to 2026-10-24, real Chrome visitors' largest content (lcp) went from 1.4 s to 1.4 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

csm_UPB_20230512_Transfer-Nachhaltigkeit_Besim_Mazhiqi-47_ab is on the first screen but marked loading="lazy", so the browser waits before fetching it and the page looks finished later. Load it eagerly (and give it fetchpriority="high" if it is the main image).

1 image is downloaded at several times the size a phone draws it, for example csm_UPB_20231114_Studierende_Besim_Mazhiqi-124_256f65e9c3.jp at 1,125 px wide, shown at 358 px. Resized copies would save about 7 KiB.

4 images (321 KiB) are JPEG, PNG or GIF. The same pictures as WebP or AVIF are usually much smaller at the same quality, and every current browser shows them.

By the Sustainable Web Design model, a visit to your homepage emits about 0.23 g of CO₂e: 27.2 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

2 tap targets are too small or too close together to hit reliably with a finger.

Landmarks should have a unique role or role/label/title (i.e. accessible name) combination: 1 element on the page fails this check, rated moderate by axe-core.

Headings should not be empty: 1 element on the page fails this check, rated minor by axe-core.

Headings skip levels (h3 → h5), which makes the page harder to scan with a screen reader.

Your title is only 21 characters: “Universität Paderborn”. Between 30 and 65 characters leaves room to say what you do and for whom.

No structured data (JSON-LD), so Google can't show rich results such as your logo, ratings or FAQs.

There are 3 <h1> headlines (“Von Strom zu Schall: Pro­jekt zur Be­stim­mung ni…”, “Nach­hal­tig­keit an der Uni­ver­si­tät Pa­der­bo…” and “Pa­der­bor­ner Wirt­schafts­ex­per­tin in in­ter­…”). One clear main headline is easier for people and search engines.

No Open Graph image (also missing: og:title, og:description), so links shared on LinkedIn, Slack or Facebook show no preview picture.

No XML sitemap at https://www.uni-paderborn.de/sitemap.xml, so Google discovers your pages only by following links.

There is no robots.txt at uni-paderborn.de/robots.txt, the first file search crawlers ask for.

The homepage links to 163 pages on uni-paderborn.de and 22 external pages.

There is no Organization (or LocalBusiness) JSON-LD, so search engines and AI assistants have no machine-readable facts about who runs the site: its name, logo, profiles and contact details.

There is no https://www.uni-paderborn.de/llms.txt, a short Markdown guide to your key pages for AI tools (llmstxt.org). It is optional and few AI tools read it yet, so treat it as a cheap extra.

https://www.uni-paderborn.de/kontakt, https://www.uni-paderborn.de/en, https://www.uni-paderborn.de/studium, https://www.uni-paderborn.de/lehre, https://www.uni-paderborn.de/lehre/profil and https://www.uni-paderborn.de/lehre/profil/leitbild-fuer-studium-und-lehre and 6 others have no meta description, so Google writes the search snippet from whatever text it finds.

https://www.uni-paderborn.de/kontakt, https://www.uni-paderborn.de/lehre/profil, https://www.uni-paderborn.de/lehre/profil/leitbild-fuer-studium-und-lehre, https://www.uni-paderborn.de/lehre/profil/digitalisierung-e-learning, https://www.uni-paderborn.de/lehre/profil/open-source and https://www.uni-paderborn.de/lehre/lehren and 3 others have no <h1> headline, so visitors and search engines get no clear main topic.

We fetched 15 pages linked from your homepage (of 139 found) and read each the way a search engine does.

3 of 14 tappable elements near the top of the page are smaller than 24 px, hard to hit with a thumb.

On a phone, there is no call to action on the first screen: visitors have to scroll to find out what to do next.

We found no call-to-action buttons or links (such as “Book a demo” or “Get a quote”) anywhere on the homepage.

No testimonials, customer logos, ratings or customer counts on the homepage: nothing tells a new visitor that others already trust you.

Your homepage shows a street address but no LocalBusiness JSON-LD, so Google and AI assistants have to guess your address, hours and phone from the page text.

The homepage shows no opening hours. If customers visit or call, show when.

There is no link to Google or Apple Maps. A directions link is one tap for a phone visitor.

No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

The homepage carries about 1,126 words of visible text.

No known cookie consent tool loads with the page. Some sites build their own banner, and some only show one to visitors from the EU.