swan.sk website review

8 files block the first paint until they finish downloading. Deferring or inlining them could save about 1.8 s.

17 images could be 1.3 MB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen. Google estimates it would make the page about 450 ms faster on a phone.

Your mobile performance score is 67. Pages that score under 90 lose visitors before the first paint.

7 files are served with short cache lifetimes, so returning visitors download them again (70 KiB).

About 285 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 260 ms faster on a phone.

Web fonts hide text while they load. Setting font-display: swap shows text immediately (about 350 ms).

Google CDN costs a phone 137 ms of main-thread work and 352 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

8 third-party services load with your homepage (Usercentrics CMP, Google CDN and jQuery CDN and others), adding 851 KiB and 352 ms of main-thread time.

3 long tasks block the main thread while loading, the longest for 165 ms. During a long task the page ignores taps.

About 27 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 120 ms faster on a phone.

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 6.6 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the text “Komplexné technologické riešenia”.

The page becomes fully interactive after 14.6 s. Good is under 3.8 s.

Visually, the page fills in at 6.1 s (Speed Index). Good is under 3.4 s.

Over the last 25 four-week periods to 2026-10-24, real Chrome visitors' largest content (lcp) went from 1.4 s to 1.9 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

The first text or image appears after 2.8 s on a phone. Good is under 1.8 s.

18 images have no width and height attributes, so the layout jumps as each one loads.

Your homepage downloads 2.9 MB in 88 requests on a phone: images 1.9 MB (25), scripts 867 KiB (29) and fonts 110 KiB (3). Under 2 MB keeps phones on slow connections fast.

1 image is downloaded at several times the size a phone draws it, for example smile_final.png at 1,920 px wide, shown at 390 px. Resized copies would save about 31 KiB.

2 images (101 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.

1 image further down the page (51 KiB) download before anyone scrolls to it. Adding loading="lazy" lets the first screen load first.

By the Sustainable Web Design model, a visit to your homepage emits about 0.83 g of CO₂e: 99.9 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

2 elements use ARIA attributes their role does not allow, which confuses screen readers.

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

Some lists contain elements other than list items, which screen readers announce wrongly.

17 images have no alt text, which hurts accessibility and image search.

All page content should be contained by landmarks: 17 elements on the page fail this check, rated moderate by axe-core.

5 visible links have no text or label, so screen readers cannot say where they go.

Headings should not be empty: 2 elements on the page fail this check, rated minor by axe-core.

No meta description, so Google writes its own snippet from whatever text it finds.

There is no <h1>, so neither visitors nor Google get a clear main headline.

Your title is only 28 characters: “Váš telekomunikačný operátor”. 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 (also missing: og:title, og:description), so links shared on LinkedIn, Slack or Facebook show no preview picture.

No XML sitemap at https://www.swan.sk/sitemap.xml, so Google discovers your pages only by following links.

There is no robots.txt at swan.sk/robots.txt, the first file search crawlers ask for.

2 links have no real href, so search engines can't follow them.

No twitter:card tag. X falls back to Open Graph, which is incomplete here.

The homepage links to 86 pages on swan.sk and 8 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.swan.sk/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.swan.sk/firmy/internet-a-data/business-internet, https://www.swan.sk/firmy/internet-a-data/managed-wifi, https://www.swan.sk/firmy/internet-a-data/sd-wan, https://www.swan.sk/firmy/internet-a-data/ip-vpn, https://www.swan.sk/firmy/internet-a-data/ethernet-line and https://www.swan.sk/firmy/internet-a-data/ethernet-vpn and 9 others have no meta description, so Google writes the search snippet from whatever text it finds.

We fetched 15 pages linked from your homepage (of 42 found) and read each the way a search engine does.

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.

No phone number or email link on the homepage, so ready-to-buy visitors have one fewer way to reach you.

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 399 words of visible text.

Before a visitor clicks anything, the page loads Google Tag Manager (measured from a US location before any click). A consent tool (Usercentrics) is installed; check it blocks these until visitors agree where the law requires it.

Opening the homepage sets 2 cookies (measured from a US location before any click).

Loading the homepage contacts 14 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.