semperoper.de website review

6 files block the first paint until they finish downloading. Deferring or inlining them could save about 3.0 s.

About 167 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 1.1 s faster on a phone.

Web fonts hide text while they load. Setting font-display: swap shows text immediately (about 1.1 s).

Your mobile performance score is 56. Pages that score under 90 lose visitors before the first paint.

About 90 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 900 ms faster on a phone.

14 files are served with short cache lifetimes, so returning visitors download them again (216 KiB).

4 images could be 175 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen. Google estimates it would make the page about 300 ms faster on a phone.

The page has 1,564 HTML elements. Above 1,500, rendering and every interaction get slower on phones.

4 long tasks block the main thread while loading, the longest for 181 ms. During a long task the page ignores taps.

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.

5 KiB could be saved by minifying JavaScript.

Your largest element takes 13.1 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the image “Szenenausschnitt aus der Produktion Different Grounds”.

Visually, the page fills in at 10.1 s (Speed Index). Good is under 3.4 s.

The page becomes fully interactive after 13.3 s. Good is under 3.8 s.

The first text or image appears after 4.3 s on a phone. Good is under 1.8 s.

Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' tap response (inp) went from 140 ms to 145 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' largest content (lcp) went from 1.1 s to 1.0 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

csm_clock5_f467cc4ee5.png weighs 708 KiB. On a phone connection a single image that size takes seconds.

Your homepage downloads 2.4 MB in 23 requests on a phone: images 1.5 MB (5), fonts 457 KiB (9) and scripts 347 KiB (5). Under 2 MB keeps phones on slow connections fast.

1 image (708 KiB) is 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 0.68 g of CO₂e: 82.2 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

6 text elements don't have enough contrast against the background to read easily, especially outdoors on a phone.

Elements must only use permitted ARIA attributes: 2 elements on the page fail this check, rated serious by axe-core.

All page content should be contained by landmarks: 2 elements on the page fail this check, rated moderate by axe-core.

Headings skip levels (h1 → h3), which makes the page harder to scan with a screen reader.

Elements with visible text labels do not have matching accessible names. (2 elements).

Your title is only 18 characters: “Semperoper Dresden”. 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.

No Open Graph image, so links shared on LinkedIn, Slack or Facebook show no preview picture.

The homepage links to 143 pages on semperoper.de and 32 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 /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.

/wishlist.html is marked noindex but linked from your homepage. If it is meant to be found, remove the noindex.

/ and /en/index.html all use the title “Semperoper Dresden”. Search engines can't tell which page to show for a search, so each competes with the others.

/wishlist.html, /spielzeit-2026-27.html, /spielplan-tickets/oper-mehr.html, /spielplan-tickets/junges-publikum.html, /spielplan-tickets/semper-matineen-und-soireen.html and /angebote-vorteile/dresdentage.html and 2 others have no meta description, so Google writes the search snippet from whatever text it finds.

/wishlist.html has no <h1> headline, so visitors and search engines get no clear main topic.

/spielplan-tickets/junges-publikum.html, /spielplan-tickets/wissenswertes-zum-kartenkauf.html and /spielplan-tickets/ermaessigungen.html took over 3 s to send their HTML from our server.

We fetched 15 pages linked from your homepage (of 78 found) and read each the way a search engine does.

11 of 23 tappable elements near the top of the page are smaller than 24 px, hard to hit with a thumb.

Large scripts ship without source maps.

No Content-Security-Policy header, the main browser-side defence against injected scripts.

The server only offers HTTP/1.1, so browsers open several connections and load files more slowly. Most hosts and CDNs turn on HTTP/2 with a setting.

No Permissions-Policy header to switch off camera, microphone and location for embedded content.

X-XSS-Protection is set to “1; mode=block”; the header is deprecated and can introduce bugs. Use 0 or remove it.

There is no /.well-known/security.txt telling researchers how to report a security problem to you.

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 longest form asks for 8 fields (0 required). Every extra field lowers completion.

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 507 words of visible text.

DMARC is set to p=none, so mail pretending to be semperoper.de is still delivered. Reports are on, so moving to quarantine is the next step.

Email authentication: SPF record 25 points, plus 15 when it ends in -all (10 for ~all); DMARC record 25, plus 25 for a reject policy (15 for quarantine); a DKIM key on a common selector 10.

Opening the homepage sets 1 cookie (measured from a US location before any click).

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.