certex.dk website review

8 files are served with short cache lifetimes, so returning visitors download them again (949 KiB).

About 196 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 890 ms faster on a phone.

Your mobile performance score is 67 (desktop: 68). Pages that score under 90 lose visitors before the first paint.

About 702 KiB of JavaScript is downloaded but never used on this page.

1 file blocks the first paint until they finish downloading. Deferring or inlining it could save about 350 ms.

Hubspot costs a phone 155 ms of main-thread work and 404 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.

5 third-party services load with your homepage (Hubspot, Cookie-Script.com and Google Tag Manager and others), adding 551 KiB and 215 ms of main-thread time.

9 long tasks block the main thread while loading, the longest for 178 ms. During a long task the page ignores taps.

Polyfills for old browsers add 22 KiB JavaScript that modern phones do not need.

2 images could be 21 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.

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

Real Chrome users on phones do not pass Google's Core Web Vitals on this page (28-day field data from the Chrome UX Report (opens in a new tab)). Google uses this in ranking.

The page becomes fully interactive after 14.3 s. Good is under 3.8 s.

Visually, the page fills in at 6.9 s (Speed Index). Good is under 3.4 s.

The first text or image appears after 3.0 s on a phone. Good is under 1.8 s.

Real visitors wait 2.7 s for the largest content to appear (75th percentile). Good is under 2.5 s.

Real visitors wait 358 ms for the page to respond to a tap (75th percentile). Good is under 200 ms.

Over the last 25 four-week periods to 2026-10-17, real Chrome visitors' tap response (inp) went from 176 ms to 330 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Real visitors see the first content after 2.0 s (75th percentile). Good is under 1.8 s.

Real visitors wait 1.6 s for your server to start answering (75th percentile). Good is under 800 ms.

Your largest element takes 3.7 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the element shown below.

Scripts block taps and scrolling for 426 ms in total while the page loads. Good is under 200 ms.

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

Your homepage downloads 2.3 MB in 75 requests on a phone: scripts 1.4 MB (10), images 502 KiB (50) and stylesheets 195 KiB (4). Under 2 MB keeps phones on slow connections fast.

By the Sustainable Web Design model, a visit to your homepage emits about 0.64 g of CO₂e: 76.8 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

1 button has no accessible name, so screen readers announce just “button”.

Some list items are not inside a list.

5 links inside paragraphs rely on colour alone to stand out.

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

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.

All page content should be contained by landmarks: 1 element on the page fails this check, rated moderate by axe-core.

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

Headings should not be empty: 4 elements on the page fail this check, rated minor by axe-core.

Headings skip levels (h3 → h5, h2 → h4 and h2 → h4), which makes the page harder to scan with a screen reader.

No Open Graph image, 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 578 pages on certex.dk and 4 external pages.

We fetched 15 pages linked from your homepage (of 198 found) and read each the way a search engine does.

21 of 41 tappable elements near the top of the page are smaller than 24 px, hard to hit with a thumb.

2 errors were logged to the browser console while the page loaded, for example “Failed to load resource: net::ERR_FAILED”.

Large scripts ship without source maps.

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

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.

certex.dk 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.

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.

Social proof on the homepage: 2 testimonial or review blocks. Pairing it with named testimonials or customer logos makes it far more convincing.

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 678 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). No consent tool was detected. Visitors from the EU, UK and several US states must be asked first.

Opening the homepage sets 2 cookies (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.

Loading the homepage contacts 8 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.