zc-rubber.com website review

Your mobile performance score is 68 (desktop: 89). Pages that score under 90 lose visitors before the first paint.

The page goes through 1 redirect before it starts loading, costing about 751 ms. Link and advertise the final URL directly.

A phone's processor spends 2.4 s on main-thread work while loading, 1.9 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

About 15 KiB of CSS is downloaded but never applied on this page.

3 KiB could be saved by minifying CSS.

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.

For real visitors the layout shifts by 1.81 (75th percentile). Good is under 0.1.

Your largest element takes 5.9 s to render on a phone. Google's threshold for “good” is 2.5 s.

Visually, the page fills in at 5.9 s (Speed Index). Good is under 3.4 s.

The first text or image appears after 3.0 s on a phone. Good is under 1.8 s.

Real visitors see the first content after 2.0 s (75th percentile). Good is under 1.8 s.

Real visitors wait 1.3 s for your server to start answering (75th percentile). Good is under 800 ms.

The page becomes fully interactive after 5.9 s. Good is under 3.8 s.

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

Over the last 25 four-week periods to 2026-10-17, real Chrome visitors' largest content (lcp) went from 1.7 s to 1.6 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

5 images (480 KiB) 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.

By the Sustainable Web Design model, a visit to your homepage emits about 0.38 g of CO₂e: 46.0 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

Input buttons must have discernible text: 1 element on the page fails this check, rated critical by axe-core.

12 tap targets are too small or too close together to hit reliably with a finger.

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

All page content should be contained by landmarks: 13 elements on the page fail this check, rated moderate by axe-core.

The page has no <main> landmark, so screen-reader users cannot jump straight to the content.

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

Page should contain a level-one heading: 1 element on the page fails this check, rated moderate by axe-core.

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

1 form field has no label, so screen readers announce an empty box and autofill guesses.

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

Your page has no <title>, so Google has to invent the blue link in search results.

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.

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

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

There is no robots.txt at zc-rubber.com/robots.txt, the first file search crawlers ask for.

The homepage links to only 0 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 incomplete here.

A phone browser shows 290 words, but the HTML your server sends has only 0. 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 https://www.zc-rubber.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.

No viewport meta tag, so phones render the desktop layout zoomed out.

65 of 69 tappable elements near the top of the page are smaller than 24 px, hard to hit with a thumb.

On a 390 px-wide phone the page scrolls sideways, a sign that something is wider than the screen.

1 error was logged to the browser console while the page loaded, for example “Mixed Content: The page at 'https://www.zc-rubber.com/' was loaded over HTTPS, but requested an insecure script 'http:/…”.

The page has no <!DOCTYPE html>, so browsers render it in quirks mode.

8 images are served at too low a resolution for sharp phone screens.

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

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.

No analytics or tag manager detected in the HTML, so you can't measure whether any of these fixes work.

No phone number or email link on the homepage, so ready-to-buy visitors have one fewer way to reach 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 290 words of visible text.

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