Access scientific-labs.co.uk. Scientific Laboratory Supplies (SLS) Ltd

name

value

score

weighting

FCP (First Contentful Paint)

Value5.1 s

9/100

10%

LCP (Largest Contentful Paint)

Value16.6 s

0/100

25%

SI (Speed Index)

Value53.2 s

0/100

10%

TBT (Total Blocking Time)

Value119,600 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.142

78/100

15%

TTI (Time to Interactive)

Value142.0 s

0/100

10%

scientific-labs.co.uk

3308 ms

www.scientificlabs.co.uk

1776 ms

gtm.js

101 ms

53f5fa4529.js

53 ms

jquery.min.js

31 ms

Our browser made a total of 82 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Scientific-labs.co.uk, 48% (39 requests) were made to Scientificlabs.co.uk and 15% (12 requests) were made to Youtube-nocookie.com. The less responsive or slowest element that took the longest time to load (3.3 sec) belongs to the original domain Scientific-labs.co.uk.

Content Size

2.2 MB

After Optimization

1.2 MB

In fact, the total size of Scientific-labs.co.uk main page is 2.2 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. Only a small number of websites need less resources to load. Images take 1.2 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 131.0 kB

Original 160.3 kB
After minification 143.8 kB
After compression 29.3 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 131.0 kB or 82% of the original size.

Image Optimization

-25%

Potential reduce by 300.4 kB

Original 1.2 MB
After minification 906.4 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Obviously, Scientific Lab S needs image optimization as it can save up to 300.4 kB or 25% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-22%

Potential reduce by 47.4 kB

Original 218.4 kB
After minification 211.4 kB
After compression 171.0 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 47.4 kB or 22% of the original size.

CSS Optimization

-84%

Potential reduce by 534.8 kB

Original 636.5 kB
After minification 635.9 kB
After compression 101.7 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Scientific-labs.co.uk needs all CSS files to be minified and compressed as it can save up to 534.8 kB or 84% of the original size.

Requests Now

After Optimization

The browser has sent 74 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Scientific Lab S. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 29 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

High

[aria-*] attributes do not match their roles

High

[aria-hidden="true"] elements contain focusable descendents

High

ARIA input fields do not have accessible names

High

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

High

ARIA toggle fields do not have accessible names

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

High

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve keyboard navigation in your application.

High

[id] attributes on active, focusable elements are not unique

High

Heading elements are not in a sequentially-descending order

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

High

Issues were logged in the Issues panel in Chrome Devtools

Search Engine Optimization Advices

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

High

Document doesn't use legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

EN
Language Claimed

EN
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Scientific-labs.co.uk can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Scientific-labs.co.uk main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

scientific-labs.co.uk

Open Graph data is detected on the main page of Scientific Lab S. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook:

Report Summary

Performance

Accessibility

Best Practices

SEO

Scientific Laboratory Supplies (SLS) Ltd | Lab Supplies

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

scientific-labs.co.uk

www.scientificlabs.co.uk

gtm.js

53f5fa4529.js

jquery.min.js

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

scientific-labs.co.uk

www.scientificlabs.co.uk

gtm.js

53f5fa4529.js

jquery.min.js

foundation.min.js

foundation.min.css

bundle.min.css

jquery.modal.min.js

jquery.lazy.min.js

addressControlScripts.js

mainbundle.min.js

js

WebResource.axd

ScriptResource.axd

ScriptResource.axd

js

conversion_async.js

app.js

js

analytics.js

images.ashx

images.ashx

images.ashx

images.ashx

images.ashx

images.ashx

images.ashx

images.ashx

roboto-regular-webfont.woff

w.js

fbevents.js

218824.js

js

logo-lg.gif

trolly-sm.gif

magnify.png

LLVXkxTwtx0

PoiiTAgBI6A

VCOf-MCd_z8

F88vQR3xFNI

jNxA4YFmo1M

hydrjJTGIic