Access combichem.co.uk.

name

value

score

weighting

FCP (First Contentful Paint)

Value6.6 s

2/100

10%

LCP (Largest Contentful Paint)

Value15.4 s

0/100

25%

SI (Speed Index)

Value10.0 s

9/100

10%

TBT (Total Blocking Time)

Value1,780 ms

10/100

30%

CLS (Cumulative Layout Shift)

Value0.73

6/100

15%

TTI (Time to Interactive)

Value16.7 s

5/100

10%

combichem.co.uk

659 ms

css-3647a-94100.css

926 ms

css-22899-09046.css

1295 ms

css

98 ms

css

148 ms

Our browser made a total of 58 requests to load all elements on the main page. We found that 57% of them (33 requests) were addressed to the original Combichem.co.uk, 14% (8 requests) were made to Maps.googleapis.com and 14% (8 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (4.1 sec) relates to the external source Google-analytics.com.

Content Size

2.9 MB

After Optimization

1.8 MB

In fact, the total size of Combichem.co.uk main page is 2.9 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. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 48.4 kB

Original 61.5 kB
After minification 59.1 kB
After compression 13.1 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 48.4 kB or 79% of the original size.

Image Optimization

-2%

Potential reduce by 26.3 kB

Original 1.3 MB
After minification 1.3 MB

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. Combichem images are well optimized though.

JavaScript Optimization

-61%

Potential reduce by 725.6 kB

Original 1.2 MB
After minification 1.2 MB
After compression 469.2 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 725.6 kB or 61% of the original size.

CSS Optimization

-84%

Potential reduce by 309.7 kB

Original 369.9 kB
After minification 359.8 kB
After compression 60.2 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. Combichem.co.uk needs all CSS files to be minified and compressed as it can save up to 309.7 kB or 84% of the original size.

Requests Now

After Optimization

The browser has sent 47 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Combichem. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 16 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

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

Heading elements are not in a sequentially-descending order

These items highlight common accessibility best practices.

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

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

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

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 uses legible font sizes

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 Combichem.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 Combichem.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

combichem.co.uk

Open Graph description is not detected on the main page of Combichem. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks:

Report Summary

Performance

Accessibility

Best Practices

SEO

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

combichem.co.uk

css-3647a-94100.css

css-22899-09046.css

css

css

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

combichem.co.uk

css-3647a-94100.css

css-22899-09046.css

css

css

css-73c77-95236.css

js-32464-09046.js

acymailing_module.js

js-8d906-09046.js

css

css

style.css

script.js

js

addthis_widget.js

system.css

bg.gif

logo-bg.png

brg_portrait.png

sl-7_1140_400.jpg

sl-8_1140_400.jpg

sl-9_1140_400.jpg

funding_bw.png

caro_5.jpg

caro_4.jpg

caro_2.jpg

caro_3.jpg

caro_1.jpg

caro_6.jpg

video-cover.jpg

fund-5.jpg

fund-17.jpg

fund-18.jpg

brg_portrait_450.png

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fontawesome-webfont.woff

mainbody-bg.png

mainbody-bg-3.png

map-bg.jpg

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