sellwise.pl website review

11 files are served with short cache lifetimes, so returning visitors download them again (335 KiB).

About 436 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 2.5 s faster on a phone.

8 third-party services load with your homepage (Google Tag Manager, Facebook and Clarity and others), adding 1.3 MB and 1.0 s of main-thread time.

Your mobile performance score is 53 (desktop: 69). Pages that score under 90 lose visitors before the first paint.

Google Tag Manager costs a phone 652 ms of main-thread work and 840 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.

Polyfills for old browsers add 47 KiB JavaScript that modern phones do not need. Google estimates it would make the page about 300 ms faster on a phone.

A phone's processor spends 2.1 s on main-thread work while loading, 1.2 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

The page has 1,785 HTML elements. Above 1,500, rendering and every interaction get slower on phones.

10 long tasks block the main thread while loading, the longest for 170 ms. During a long task the page ignores taps.

3 images could be 36 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.

Your largest element takes 15.6 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the image “Zespół SellWise podczas pracy nad strategią wzrostu”.

The page becomes fully interactive after 21.6 s. Good is under 3.8 s.

Visually, the page fills in at 8.5 s (Speed Index). Good is under 3.4 s.

Scripts block taps and scrolling for 535 ms in total while the page loads. Good is under 200 ms.

Your homepage downloads 3.3 MB in 122 requests on a phone: scripts 1.4 MB (32), other files 1.3 MB (43) and HTML 308 KiB (3). Under 2 MB keeps phones on slow connections fast.

1 image is downloaded at several times the size a phone draws it, for example 24adff3f43c334ceaf89b0d45fb95894a09156c2-2964x2400.png at 1,200 px wide, shown at 350 px. Resized copies would save about 17 KiB.

1 image further down the page (71 KiB) download before anyone scrolls to it. Adding loading="lazy" lets the first screen load first.

By the Sustainable Web Design model, a visit to your homepage emits about 0.93 g of CO₂e: 111.4 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

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

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

2 form fields have no label, so screen readers announce an empty box and autofill guesses.

Elements with visible text labels do not have matching accessible names. (1 element).

The homepage links to 154 pages on sellwise.pl and 19 external pages.

We fetched 15 pages linked from your homepage (of 50 found) and read each the way a search engine does.

1 error was logged to the browser console while the page loaded, for example “%c%d font-size:0;color:transparent NaN”.

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

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 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 1,974 words of visible text.

Before a visitor clicks anything, the page loads Google Ads, Google Analytics, Google Tag Manager, LinkedIn Insight and Meta Pixel and 1 more (measured from a US location before any click). A consent tool (CookieYes) is installed; check it blocks these until visitors agree where the law requires it.

Opening the homepage sets 7 cookies (measured from a US location before any click).

Loading the homepage contacts 30 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.