isotec.de website review

3 files block the first paint until they finish downloading. Deferring or inlining them could save about 900 ms.

Web fonts hide text while they load. Setting font-display: swap shows text immediately (about 850 ms).

15 images could be 303 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 1,701 HTML elements. Above 1,500, rendering and every interaction get slower on phones.

4 third-party services load with your homepage (Google Maps, cookiebot.eu and fraud0.com and others), adding 284 KiB and 158 ms of main-thread time.

About 23 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 150 ms faster on a phone.

About 148 KiB of JavaScript is downloaded but never used on this page.

2 files are served with short cache lifetimes, so returning visitors download them again (136 KiB).

3 long tasks block the main thread while loading, the longest for 66 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.

The page becomes fully interactive after 7.5 s. Good is under 3.8 s.

Over the last 25 four-week periods to 2026-10-17, 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).

Visually, the page fills in at 4.2 s (Speed Index). Good is under 3.4 s.

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

Over the last 25 four-week periods to 2026-10-17, real Chrome visitors' tap response (inp) went from 94 ms to 97 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

1 image is downloaded at several times the size a phone draws it, for example keller.webp at 1,200 px wide, shown at 155 px. Resized copies would save about 49 KiB.

6 images further down the page (206 KiB) download before anyone scrolls to them. Adding loading="lazy" lets the first screen load first.

By the Sustainable Web Design model, a visit to your homepage emits about 0.43 g of CO₂e: 51.9 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

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

ARIA dialog and alertdialog nodes should have an accessible name: 1 element on the page fails this check, rated serious by axe-core.

Scrollable region must have keyboard access: 1 element on the page fails this check, rated serious by axe-core.

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

All page content should be contained by landmarks: 6 elements on the page fail this check, rated moderate by axe-core.

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

4 form fields have no label, so screen readers announce an empty box and autofill guesses.

Headings skip levels (h1 → h3, h2 → h4 and h2 → h4), which makes the page harder to scan with a screen reader.

Elements with visible text labels do not have matching accessible names. (1 element).

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

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

The homepage links to 66 pages on isotec.de and 11 external pages.

https://www.isotec.de/isotec-geschaeftskunden is marked noindex but linked from your homepage. If it is meant to be found, remove the noindex.

We fetched 15 pages linked from your homepage (of 53 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.

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.

Your longest form asks for 11 fields (6 required). Every extra field lowers completion.

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 817 words of visible text.

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

Loading the homepage contacts 5 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.