robatherm.com website review

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

Your mobile performance score is 76 (desktop: 82). Pages that score under 90 lose visitors before the first paint.

Web fonts hide text while they load. Setting font-display: swap shows text immediately (about 600 ms).

About 88 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 320 ms faster on a phone.

About 81 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 310 ms faster on a phone.

The page has 1,628 HTML elements. Above 1,500, rendering and every interaction get slower on phones.

5 files are served with short cache lifetimes, so returning visitors download them again (197 KiB).

16 KiB could be saved by minifying CSS.

2 third-party services load with your homepage (Cookiebot and Google Tag Manager), adding 232 KiB and 80 ms of main-thread time.

2 images could be 35 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.

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

3 KiB could be saved by minifying JavaScript.

Visually, the page fills in at 7.5 s (Speed Index). Good is under 3.4 s.

Your largest element takes 4.6 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the element shown below.

The page becomes fully interactive after 4.7 s. Good is under 3.8 s.

Over the last 25 four-week periods to 2026-10-17, real Chrome visitors' tap response (inp) went from 75 ms to 71 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Over the last 25 four-week periods to 2026-10-17, real Chrome visitors' largest content (lcp) went from 1.1 s to 1.1 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Your homepage downloads 5.6 MB in 54 requests on a phone: images 5.0 MB (25), scripts 354 KiB (15) and fonts 172 KiB (3). Under 2 MB keeps phones on slow connections fast.

2 images further down the page (72 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 1.60 g of CO₂e: 192.0 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

All page content should be contained by landmarks: 8 elements on the page fail this check, rated moderate by axe-core.

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.

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

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

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

Structured data found (ImageObject, Page and WebPage) but with 7 problems, for example “ImageObject: contentUrl is not an absolute URL ("/files/robatherm/images/teaser/1-0_ecovadis.jpg")”.

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

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

The homepage links to 280 pages on robatherm.com and 10 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.

Your homepage links to /en/en, which answers with an error. Visitors hit a dead end and search engines drop it.

/en/robatherm-magazine, /fr, /nl, /be-nl, /sk and /cz and 7 others have no meta description, so Google writes the search snippet from whatever text it finds.

/de, /fr, /nl, /be-nl, /sk and /cz and 2 others have no <h1> headline, so visitors and search engines get no clear main topic.

We fetched 15 pages linked from your homepage (of 59 found) and read each the way a search engine does.

9 of 28 tappable elements near the top of the page are smaller than 24 px, hard to hit with a thumb.

1 link from your homepage to your own site is broken, for example https://www.robatherm.com/en/en (404).

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

Opening https://robatherm.com goes through 2 redirects before the homepage loads.

1 link go through two or more redirects, for example https://robatherm.info/en/air-handling/trueindividual/hygiene/filterwall-u15.

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.

robatherm.com has no CAA record, so any certificate authority may issue a certificate for it. A CAA record naming your provider (for example letsencrypt.org) closes that door.

robatherm.com's DNS answers are not signed. DNSSEC stops attackers forging them to send visitors or email elsewhere; most registrars switch it on in a click, though most sites still run without it.

No testimonials, customer logos, ratings or customer counts on the homepage: nothing tells a new visitor that others already trust 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 445 words of visible text.

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.

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

Loading the homepage contacts 3 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.