bluecurrent.nl website review

About 712 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 3.3 s faster on a phone.

1 file blocks the first paint until they finish downloading. Deferring or inlining it could save about 2.4 s.

Your mobile performance score is 42 (desktop: 50). Under 50 is Google's “poor” band: many phone visitors leave before the page is usable.

3 images could be 1.2 MB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.

3 third-party services load with your homepage (Google Tag Manager, sanity.io and axept.io), adding 3.2 MB and 734 ms of main-thread time.

Google Tag Manager costs a phone 730 ms of main-thread work and 884 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.

12 long tasks block the main thread while loading, the longest for 271 ms. During a long task the page ignores taps.

A phone's processor spends 2.5 s on main-thread work while loading, 1.4 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

sanity.io costs a phone 4 ms of main-thread work and 2.3 MB 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.

Polyfills for old browsers add 14 KiB JavaScript that modern phones do not need.

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.

Your largest element takes 12.6 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the text “Innovatieve laadpunten en dynamische energieoplossingen die…”.

The page becomes fully interactive after 14.7 s. Good is under 3.8 s.

Scripts block taps and scrolling for 762 ms in total while the page loads. Good is under 200 ms.

For real visitors the layout shifts by 0.19 (75th percentile). Good is under 0.1.

Visually, the page fills in at 5.0 s (Speed Index). Good is under 3.4 s.

The first text or image appears after 2.6 s on a phone. Good is under 1.8 s.

The layout shifts by 0.173 while loading, so content jumps under the reader's thumb. Good is under 0.1.

Over the last 25 four-week periods to 2026-10-17, real Chrome visitors' tap response (inp) went from 111 ms to 100 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 1.3 s to 1.4 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Your homepage downloads 4.2 MB in 103 requests on a phone: images 2.3 MB (26), scripts 1.5 MB (28) and fonts 300 KiB (4). Under 2 MB keeps phones on slow connections fast.

By the Sustainable Web Design model, a visit to your homepage emits about 1.19 g of CO₂e: 142.2 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

2 buttons have no accessible name, so screen readers announce just “button”.

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

<html> element must have a lang attribute: 1 element on the page fails this check, rated serious by axe-core.

1 tap target is too small or too close together to hit reliably with a finger.

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

Heading levels should only increase by one: 1 element on the page fails this check, rated moderate by axe-core.

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

The <html> element has no lang attribute, so screen readers may read the page in the wrong voice and accent.

No structured data (JSON-LD), so Google can't show rich results such as your logo, ratings or FAQs.

No canonical URL, so duplicate versions of the homepage (with or without www, with tracking parameters) can split ranking signals.

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

The homepage links to only 3 pages on your own site, so visitors and crawlers find few routes into the rest of it.

No favicon is declared in the HTML, so browser tabs and Google's mobile results may show a generic icon.

No twitter:card tag. X falls back to Open Graph, which is set, so this is minor.

A phone browser shows 594 words, but the HTML your server sends has only 150. GPTBot, ClaudeBot and PerplexityBot read that HTML without running JavaScript, so they see an almost empty page. Server-side rendering or pre-rendering fixes it.

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.

/legal has under 150 words in the HTML. Thin pages rarely rank; if the text loads with JavaScript, crawlers that don't run it see even less.

We fetched 1 page linked from your homepage and read each the way a search engine does.

2 errors were logged to the browser console while the page loaded, for example “Error: <svg> attribute width: Expected length, "auto".”.

Large scripts ship without source maps.

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

Neither X-Frame-Options nor a CSP frame-ancestors policy is set, so any site can embed yours in a frame.

X-Content-Type-Options: nosniff is missing, so browsers may guess file types.

No Referrer-Policy header, so full URLs can leak to the sites you link to.

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

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

bluecurrent.nl'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.

On a phone, there is no call to action on the first screen: visitors have to scroll to find out what to do next.

No testimonials, customer logos, ratings or customer counts on the homepage: nothing tells a new visitor that others already trust you.

There is no form on the homepage, so every lead has to click through to another page first.

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 594 words of visible text.

DMARC is set to p=none, so mail pretending to be bluecurrent.nl 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.

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 3 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.