sunlu.com website review

About 1.0 MB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 5.3 s faster on a phone.

Your mobile performance score is 47. Under 50 is Google's “poor” band: many phone visitors leave before the page is usable.

36 files are served with short cache lifetimes, so returning visitors download them again (133 KiB).

15 files block the first paint until they finish downloading. Deferring or inlining them could save about 600 ms.

Google Tag Manager costs a phone 288 ms of main-thread work and 296 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.

A phone's processor spends 2.2 s on main-thread work while loading, 936 ms of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

2 third-party services load with your homepage (Google Tag Manager and Google Analytics), adding 297 KiB and 288 ms of main-thread time.

12 long tasks block the main thread while loading, the longest for 221 ms. During a long task the page ignores taps.

About 29 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.

2 images could be 19 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.

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 14.8 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the image “SUNLU Banner”.

The page becomes fully interactive after 14.8 s. Good is under 3.8 s.

Visually, the page fills in at 7.0 s (Speed Index). Good is under 3.4 s.

The first text or image appears after 3.5 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 1.6 s for your server to start answering (75th percentile). Good is under 800 ms.

Scripts block taps and scrolling for 591 ms in total while the page loads. Good is under 200 ms.

Your homepage downloads 2.4 MB in 84 requests on a phone: scripts 1.5 MB (22), images 550 KiB (15) and other files 269 KiB (30). Under 2 MB keeps phones on slow connections fast.

1 image (123 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.

By the Sustainable Web Design model, a visit to your homepage emits about 0.69 g of CO₂e: 82.7 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

ARIA roles used must conform to valid values: 2 elements on the page fail this check, rated critical by axe-core.

1 text element doesn't have enough contrast against the background to read easily, especially outdoors on a phone.

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

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

Headings should not be empty: 2 elements on the page fail this check, rated minor by axe-core.

Alternative text of images should not be repeated as text: 1 element on the page fails this check, rated minor by axe-core.

Headings skip levels (h1 → h3), which makes the page harder to scan with a screen reader.

Your title is 93 characters, so Google will cut it off around 60: “SUNLU - Leading 3D Printing Materials Supplier | 3D Printer Filament, Resin & Dryer Solut…”.

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

2 links use generic text like “click here” or “learn more”, which tells Google nothing about the page behind them.

No twitter:card tag. X falls back to Open Graph, which is incomplete here.

The homepage links to 30 pages on sunlu.com and 10 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.

/, /community, /materials-lab/color-aesthetics, /materials-lab/application-scenarios, /materials-lab/printer-presets and /materials-lab/extreme-test-zone and 4 others all use the title “SUNLU - Leading 3D Printing Materials Supplier | 3D Printer Filament,…”. Search engines can't tell which page to show for a search, so each competes with the others.

/community, /materials-lab/color-aesthetics, /materials-lab/application-scenarios, /materials-lab/printer-presets, /materials-lab/material-comparison and /materials-lab/extreme-test-zone and 4 others use the same meta description. A description written for each page earns more clicks.

/community, /materials-lab/color-aesthetics, /materials-lab/printer-presets, /materials-lab/material-comparison, /materials-lab/extreme-test-zone and /match-ai have no <h1> headline, so visitors and search engines get no clear main topic.

/community, /materials-lab/color-aesthetics, /materials-lab/application-scenarios, /materials-lab/printer-presets, /materials-lab/extreme-test-zone and /match-ai 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.

/collections/1, /collections/2, /materials-lab/application-scenarios, /materials-lab/material-comparison, /materials-lab/extreme-test-zone and /match-ai and 3 others took over 3 s to send their HTML from our server.

We fetched 15 pages linked from your homepage (of 22 found) and read each the way a search engine does.

1 error was logged to the browser console while the page loaded, for example “Hydration completed but contains mismatches.”.

Large scripts ship without source maps.

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.

The homepage has only about 232 words of visible text; thin pages give Google and first-time buyers little to go on.

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 2 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 1 host run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.