serimax.com website review

About 305 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 1.8 s faster on a phone.

46 files are served with short cache lifetimes, so returning visitors download them again (473 KiB).

Your mobile performance score is 56 (desktop: 91). Pages that score under 90 lose visitors before the first paint.

Google Tag Manager costs a phone 471 ms of main-thread work and 648 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.

About 27 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 300 ms faster on a phone.

7 files block the first paint until they finish downloading. Deferring or inlining them could save about 300 ms.

4 third-party services load with your homepage (Google Tag Manager, Google Fonts and Google/Doubleclick Ads and others), adding 652 KiB and 471 ms of main-thread time.

Polyfills for old browsers add 13 KiB JavaScript that modern phones do not need. Google estimates it would make the page about 150 ms faster on a phone.

6 KiB could be saved by minifying CSS.

7 long tasks block the main thread while loading, the longest for 101 ms. During a long task the page ignores taps.

3 images could be 34 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.

Desktop scores 91 but mobile only 56. A gap that wide usually means heavy scripts and images that hit phones hardest.

Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

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 8.1 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the text “We and our 980 partners process your personal data, e.g. yo…”. Most of its time is element render delay (5.9 s).

The first text or image appears after 5.3 s on a phone. Good is under 1.8 s.

Visually, the page fills in at 10.4 s (Speed Index). Good is under 3.4 s.

The page becomes fully interactive after 8.2 s. Good is under 3.8 s.

Real visitors wait 826 ms for your server to start answering (75th percentile). Good is under 800 ms.

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

Over the last 25 four-week periods to 2026-10-24, real Chrome visitors' tap response (inp) went from 158 ms to 185 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

1 image (43 KiB) is 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.

1 image further down the page (21 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 0.35 g of CO₂e: 41.8 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

Your meta description is 342 characters; Google truncates after about 160, so the end of your pitch is cut.

The homepage links to 39 pages on serimax.com and 6 external pages.

There is no https://serimax.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://serimax.com/sectors, https://serimax.com/lowcarbon-renewables, https://serimax.com/oil-gas-petrochemical, https://serimax.com/saturnax-01, https://serimax.com/pipe-preparation and https://serimax.com/clamping-alignment-and-fit-up and 6 others use the same meta description. A description written for each page earns more clicks.

Your homepage links to 2 pages by a URL that isn't their canonical one, for example https://serimax.com/saturnax-01, whose canonical is https://serimax.com/weldingmachines-robotics/saturnax-01. Linking straight to the canonical URL saves crawlers a detour and keeps ranking signals on one address.

https://serimax.com/sectors, https://serimax.com/lowcarbon-renewables, https://serimax.com/oil-gas-petrochemical, https://serimax.com/equipmentfleet, https://serimax.com/weldingmachines-robotics and https://serimax.com/saturnax-01 and 9 others have no <h1> headline, so visitors and search engines get no clear main topic.

https://serimax.com/sectors, https://serimax.com/lowcarbon-renewables, https://serimax.com/oil-gas-petrochemical, https://serimax.com/equipmentfleet, https://serimax.com/weldingmachines-robotics and https://serimax.com/saturnax-01 and 9 others 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 15 pages linked from your homepage (of 32 found) and read each the way a search engine does.

2 of 7 tappable elements near the top of the page are smaller than 24 px, hard to hit with a thumb.

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

1 image is displayed at the wrong aspect ratio, so it looks stretched or squashed.

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

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 438 words of visible text.

Before a visitor clicks anything, the page loads Google Ads, 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.

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.