cellimpact.com website review

About 742 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 5.8 s faster on a phone.

5 files block the first paint until they finish downloading. Deferring or inlining them could save about 1.2 s.

13 files are served with short cache lifetimes, so returning visitors download them again (9.1 MB).

Your mobile performance score is 61 (desktop: 83). Pages that score under 90 lose visitors before the first paint.

7 third-party services load with your homepage (YouTube, Google Tag Manager and Google CDN and others), adding 2.0 MB and 679 ms of main-thread time.

YouTube costs a phone 601 ms of main-thread work and 1.7 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.

1 image could be 705 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.

About 80 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.

6 long tasks block the main thread while loading, the longest for 218 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.

Your largest element takes 17.7 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the text “A world leading manufacturer of customised bipolar flow pla…”.

The page becomes fully interactive after 18.1 s. Good is under 3.8 s.

Visually, the page fills in at 6.2 s (Speed Index). Good is under 3.4 s.

The first text or image appears after 2.9 s on a phone. Good is under 1.8 s.

Scripts block taps and scrolling for 219 ms in total while the page loads. Good is under 200 ms.

3 images 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.

Your homepage downloads 11.3 MB in 44 requests on a phone: media 7.9 MB (1), scripts 1.6 MB (11) and images 1.3 MB (11). Under 2 MB keeps phones on slow connections fast.

water-cell-impact.jpg weighs 773 KiB. On a phone connection a single image that size takes seconds.

2 images are downloaded at several times the size a phone draws them, for example water-cell-impact.jpg at 1,920 px wide, shown at 360 px. Resized copies would save about 749 KiB.

4 images (1.3 MB) are JPEG, PNG or GIF. The same pictures as WebP or AVIF are usually much smaller at the same quality, and every current browser shows them.

3 images further down the page (1.1 MB) 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 3.19 g of CO₂e: 382.9 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

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.

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

Headings should not be empty: 3 elements on the page fail this check, rated minor by axe-core.

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

Your meta description is 187 characters; Google truncates after about 160, so the end of your pitch is cut.

Structured data found (Organization) but with 1 problem, for example “Organization: logo is not an absolute URL ("/media/mbyfyvnz/cell-impact-favicon.png")”.

No XML sitemap at https://www.cellimpact.com/sitemap, so Google discovers your pages only by following links.

The homepage links to 18 pages on cellimpact.com and 8 external pages.

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.

/cell-impact-forming, /flow-plates, /up-and-running, /news and /contact use the same meta description. A description written for each page earns more clicks.

/up-and-running and /news took over 3 s to send their HTML from our server.

We fetched 9 pages linked from your homepage and read each the way a search engine does.

5 third-party cookies are set on load; browsers are restricting these, so whatever relies on them breaks.

1 error was logged to the browser console while the page loaded, for example “Failed to load resource: net::ERR_FAILED”.

Chrome logged issues while loading the page (“Cookie”).

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

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.

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.

cellimpact.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.

cellimpact.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.

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

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

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 890 words of visible text.

cellimpact.com has no DMARC record, so nothing tells receivers what to do with mail that fails SPF or DKIM. Gmail and Yahoo require DMARC from bulk senders.

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 1 cookie (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 11 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.