x4pharma.com website review

17 files block the first paint until they finish downloading. Deferring or inlining them could save about 2.3 s.

About 249 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 1.0 s faster on a phone.

Your mobile performance score is 57 (desktop: 69). Pages that score under 90 lose visitors before the first paint.

About 93 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 750 ms faster on a phone.

A phone's processor spends 2.7 s on main-thread work while loading, 1.0 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

Google Tag Manager costs a phone 235 ms of main-thread work and 304 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.

3 third-party services load with your homepage (Google Tag Manager, Google Analytics and Google Fonts), adding 378 KiB and 255 ms of main-thread time.

17 long tasks block the main thread while loading, the longest for 167 ms. During a long task the page ignores taps.

1 file is served with short cache lifetimes, so returning visitors download them again (16 KiB).

12 KiB could be saved by minifying CSS.

8 KiB could be saved by minifying JavaScript.

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 7.3 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 8.7 s. Good is under 3.8 s.

The first text or image appears after 3.3 s on a phone. Good is under 1.8 s.

Visually, the page fills in at 4.8 s (Speed Index). Good is under 3.4 s.

Scripts block taps and scrolling for 402 ms in total while the page loads. Good is under 200 ms.

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

Chrome's UX Report (opens in a new tab) has too little real-visitor traffic for this site, so the figures here are lab measurements from Google's test phone on a throttled 4G connection.

By the Sustainable Web Design model, a visit to your homepage emits about 0.39 g of CO₂e: 47.0 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

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

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

All page content should be contained by landmarks: 5 elements on the page fail this check, rated moderate by axe-core.

The viewport tag blocks pinch-zoom, which low-vision visitors rely on.

1 visible link has no text or label, so screen readers cannot say where it goes.

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 25 characters: “Home - X4 Pharmaceuticals”. Between 30 and 65 characters leaves room to say what you do and for whom.

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

The homepage links to 24 pages on x4pharma.com and 25 external pages.

Your Organization JSON-LD is missing sameAs (social profiles), description and contact details. These are the facts AI assistants use to describe a business and to tell it apart from others with a similar name.

There is no https://www.x4pharma.com/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.x4pharma.com/about, https://www.x4pharma.com/our-medicine, https://www.x4pharma.com/patients, https://www.x4pharma.com/healthcare-professionals, https://www.x4pharma.com/careers and https://www.x4pharma.com/terms-of-use and 2 others have no meta description, so Google writes the search snippet from whatever text it finds.

https://www.x4pharma.com/our-medicine and https://www.x4pharma.com/privacy have 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 9 pages linked from your homepage and read each the way a search engine does.

5 of 10 tappable elements near the top of the page are smaller than 24 px, hard to hit with a thumb.

Large scripts ship without source maps.

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.

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.

The homepage has only about 78 words of visible text; thin pages give Google and first-time buyers little to go on.

The homepage shows no opening hours. If customers visit or call, show when.

Your phone number appears as text but isn't a tel: link, so phone visitors can't tap to call.

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

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.

Before a visitor clicks anything, the page loads Google Analytics and 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 4 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 4 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.