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uk.vwr.com screenshot

Report Summary

  • 21

    Performance

    Renders faster than
    39% of other websites

  • 96

    Accessibility

    Visual factors better than
    that of 88% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

uk.vwr.com

VWR, Part of Avantor - Chemicals and laboratory scientific supplies

Page Load Speed

5.9 sec in total

First Response

23 ms

Resources Loaded

5.4 sec

Page Rendered

493 ms

uk.vwr.com screenshot

About Website

Visit uk.vwr.com now to see the best up-to-date Uk VWR content for United States and also check out these interesting facts you probably never knew about uk.vwr.com

VWR International, a global laboratory supplier and distributor of chemicals, life science products, consumables, equipment, instruments, furniture, e-commerce and services

Visit uk.vwr.com

Key Findings

We analyzed Uk.vwr.com page load time and found that the first response time was 23 ms and then it took 5.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

uk.vwr.com performance score

21

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

63/100

10%

LCP (Largest Contentful Paint)

Value12.2 s

0/100

25%

SI (Speed Index)

Value6.0 s

47/100

10%

TBT (Total Blocking Time)

Value1,560 ms

13/100

30%

CLS (Cumulative Layout Shift)

Value0.372

28/100

15%

TTI (Time to Interactive)

Value11.4 s

19/100

10%

Network Requests Diagram

uk.vwr.com

23 ms

uk.vwr.com

61 ms

172 ms

master.css

73 ms

rocket-loader.min.js

20 ms

Our browser made a total of 115 requests to load all elements on the main page. We found that 97% of them (112 requests) were addressed to the original Uk.vwr.com, 1% (1 request) were made to Cdn.auth0.com and 1% (1 request) were made to C.la2c1.salesforceliveagent.com. The less responsive or slowest element that took the longest time to load (2.2 sec) belongs to the original domain Uk.vwr.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 342.6 kB (14%)

Content Size

2.4 MB

After Optimization

2.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Uk.vwr.com main page is 2.4 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. 60% of websites need less resources to load. Images take 1.7 MB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 310.1 kB

  • Original 357.3 kB
  • After minification 264.0 kB
  • After compression 47.2 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. This page needs HTML code to be minified as it can gain 93.3 kB, which is 26% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 310.1 kB or 87% of the original size.

Image Optimization

-0%

Potential reduce by 20 B

  • Original 1.7 MB
  • After minification 1.7 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. Uk VWR images are well optimized though.

JavaScript Optimization

-12%

Potential reduce by 30.7 kB

  • Original 256.0 kB
  • After minification 256.0 kB
  • After compression 225.3 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 30.7 kB or 12% of the original size.

CSS Optimization

-2%

Potential reduce by 1.7 kB

  • Original 102.6 kB
  • After minification 102.6 kB
  • After compression 100.9 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. Uk.vwr.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 21 (19%)

Requests Now

112

After Optimization

91

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 112 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Uk VWR. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and from 10 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

uk.vwr.com

uk.vwr.com

23 ms

uk.vwr.com

uk.vwr.com

61 ms

172 ms

master.css

master.css

73 ms

rocket-loader.min.js

rocket-loader.min.js

20 ms

modernizr.min.js

modernizr.min.js

66 ms

jquery-3.6.1.min.js

jquery-3.6.1.min.js

66 ms

jquery-migrate-3.4.0.min.js

jquery-migrate-3.4.0.min.js

47 ms

unified-responsive-2022.min.js

unified-responsive-2022.min.js

56 ms

datatables-1.12.1.min.js

datatables-1.12.1.min.js

65 ms

jquery-ui-custom-1.13.1.min.js

jquery-ui-custom-1.13.1.min.js

200 ms

auth0.min.js

auth0.min.js

26 ms

generictagmanager.js

generictagmanager.js

201 ms

deployment.js

deployment.js

192 ms

jquery.cookiesdirective2.js

jquery.cookiesdirective2.js

185 ms

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180 ms

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444 ms

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422 ms

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414 ms

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435 ms

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442 ms

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146 ms

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598 ms

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544 ms

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553 ms

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904 ms

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872 ms

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bioprocessing_solutions_antibody_90.jpg

576 ms

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688 ms

safety_and_cleaning_100x100.jpg

safety_and_cleaning_100x100.jpg

1059 ms

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1008 ms

brady_32836_img_90.jpg

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996 ms

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1092 ms

controlled_environment_main_90.jpg

controlled_environment_main_90.jpg

889 ms

Research_thumb.jpg

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1313 ms

labstart_uk_90.jpg

labstart_uk_90.jpg

1043 ms

science-delivered-100x100.jpg

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1413 ms

covid_19_90x90.jpg

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1414 ms

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1450 ms

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1481 ms

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1509 ms

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1730 ms

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1564 ms

banner_chemcial_corner_90_v2.png

banner_chemcial_corner_90_v2.png

1559 ms

avantor-fluid-handling-100x100.jpg

avantor-fluid-handling-100x100.jpg

1833 ms

mt_rd.png

mt_rd.png

1897 ms

EntrisIIBCA90x90.jpg

EntrisIIBCA90x90.jpg

1943 ms

seradigm_ultimate_grade_fbs_90x90.jpg

seradigm_ultimate_grade_fbs_90x90.jpg

1694 ms

production_segment_2018_90.jpg

production_segment_2018_90.jpg

1964 ms

production_chemicals_22803feature_9090.jpg

production_chemicals_22803feature_9090.jpg

2068 ms

prod-3rd-col-nitrile-gloves.jpg

prod-3rd-col-nitrile-gloves.jpg

2139 ms

mt_qc.png

mt_qc.png

2211 ms

f_b_100.jpg

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2181 ms

mt_healthcare.png

mt_healthcare.png

1973 ms

health_q4_2015_1.jpg

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1690 ms

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2072 ms

health_q4_2015_3.jpg

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1796 ms

segment_microbiology_teaser.jpg

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2125 ms

microscopy_qc_thumb.jpg

microscopy_qc_thumb.jpg

1841 ms

thumbnailbrochure_whitepaper.png

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1818 ms

thumb_segment_education_reversed.png

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1883 ms

asecos_7070.png

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2192 ms

vwr_ecommerce_70.jpg

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2100 ms

furniture_segment_thumb_012014.png

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1640 ms

furniture_q4_2015_1.jpg

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1964 ms

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1731 ms

JTBaker-RoboticTips-100x100.jpg

JTBaker-RoboticTips-100x100.jpg

1912 ms

vwrcatalyst_services_90.jpg

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1686 ms

avantor_logo_300w.png

avantor_logo_300w.png

1614 ms

services_solutions_FR_thumb.jpg

services_solutions_FR_thumb.jpg

2018 ms

clinical_trials_70.jpg

clinical_trials_70.jpg

2001 ms

vwr_catalyst_70.jpg

vwr_catalyst_70.jpg

1608 ms

e_commerce_without_logo_90.jpg

e_commerce_without_logo_90.jpg

1813 ms

instrument_maintenance_uk_90.jpg

instrument_maintenance_uk_90.jpg

1882 ms

sub_page.png

sub_page.png

1857 ms

sustainability_services_thumb.png

sustainability_services_thumb.png

1870 ms

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2001 ms

emolecules_rev_thumb.png

emolecules_rev_thumb.png

1940 ms

Labtools_Mainthumb.png

Labtools_Mainthumb.png

2145 ms

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2024 ms

BHISlider1.jpg

BHISlider1.jpg

1596 ms

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1516 ms

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1466 ms

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1432 ms

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1416 ms

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1309 ms

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1305 ms

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1262 ms

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1209 ms

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1224 ms

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1140 ms

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1142 ms

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1096 ms

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1129 ms

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1058 ms

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1032 ms

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1019 ms

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967 ms

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905 ms

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893 ms

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handy_guides_selection_2021.png

855 ms

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focus_pharma_2021.png

776 ms

helpers.css

helpers.css

24 ms

webfonts.css

webfonts.css

24 ms

jquery-ui.css

jquery-ui.css

38 ms

hinted-Averta-Regular.woff

hinted-Averta-Regular.woff

29 ms

hinted-Averta-Light.woff

hinted-Averta-Light.woff

695 ms

hinted-Averta-Bold.woff

hinted-Averta-Bold.woff

397 ms

jquery-ui.structure.css

jquery-ui.structure.css

32 ms

jquery-ui.theme.css

jquery-ui.theme.css

25 ms

datatables.min.css

datatables.min.css

23 ms

mediagallery2.css

mediagallery2.css

23 ms

jquery.fancybox.min.css

jquery.fancybox.min.css

32 ms

legacy_css.css

legacy_css.css

24 ms

modernizr.min.js

modernizr.min.js

45 ms

Accessibility Review

uk.vwr.com accessibility score

96

Accessibility Issues

ARIA

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.

Impact

Issue

High

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

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

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

Best Practices

uk.vwr.com best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

uk.vwr.com SEO score

91

Search Engine Optimization Advices

Content Best Practices

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

Impact

Issue

High

Links do not have descriptive text

Mobile Friendly

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/).

Impact

Issue

High

Document uses 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 Uk.vwr.com 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 Uk.vwr.com 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

uk.vwr.com

Open Graph description is not detected on the main page of Uk VWR. 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: