Tools & Wizards About Us
chemistryworld.com screenshot

Report Summary

  • 20

    Performance

    Renders faster than
    37% of other websites

  • 96

    Accessibility

    Visual factors better than
    that of 88% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

chemistryworld.com

Chemistry news, research and opinions | Chemistry World

Page Load Speed

3.8 sec in total

First Response

143 ms

Resources Loaded

2.8 sec

Page Rendered

797 ms

chemistryworld.com screenshot

About Website

Visit chemistryworld.com now to see the best up-to-date Chemistry World content for Germany and also check out these interesting facts you probably never knew about chemistryworld.com

Chemistry, covered. Science news, research, reviews, features and opinions. Read Chemistry World to keep up with stories from across the chemical sciences.

Visit chemistryworld.com

Key Findings

We analyzed Chemistryworld.com page load time and found that the first response time was 143 ms and then it took 3.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

chemistryworld.com performance score

20

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.1 s

22/100

10%

LCP (Largest Contentful Paint)

Value20.5 s

0/100

25%

SI (Speed Index)

Value7.5 s

27/100

10%

TBT (Total Blocking Time)

Value4,270 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value24.6 s

0/100

10%

Network Requests Diagram

chemistryworld.com

143 ms

chemistryworld.com

278 ms

www.chemistryworld.com

405 ms

gpt.js

57 ms

core.css

155 ms

Our browser made a total of 86 requests to load all elements on the main page. We found that 20% of them (17 requests) were addressed to the original Chemistryworld.com, 53% (46 requests) were made to D2cbg94ubxgsnp.cloudfront.net and 7% (6 requests) were made to Securepubads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (1.3 sec) relates to the external source D2cbg94ubxgsnp.cloudfront.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 342.2 kB (19%)

Content Size

1.8 MB

After Optimization

1.5 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Chemistryworld.com main page is 1.8 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. 75% 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. Javascripts take 848.2 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 139.9 kB

  • Original 174.2 kB
  • After minification 167.9 kB
  • After compression 34.3 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 139.9 kB or 80% of the original size.

Image Optimization

-3%

Potential reduce by 23.7 kB

  • Original 677.0 kB
  • After minification 653.3 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. Chemistry World images are well optimized though.

JavaScript Optimization

-17%

Potential reduce by 147.7 kB

  • Original 848.2 kB
  • After minification 848.2 kB
  • After compression 700.4 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 147.7 kB or 17% of the original size.

CSS Optimization

-22%

Potential reduce by 30.8 kB

  • Original 142.8 kB
  • After minification 135.8 kB
  • After compression 112.0 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. Chemistryworld.com needs all CSS files to be minified and compressed as it can save up to 30.8 kB or 22% of the original size.

Requests Breakdown

Number of requests can be reduced by 17 (22%)

Requests Now

77

After Optimization

60

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 77 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chemistry World. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

chemistryworld.com

chemistryworld.com

143 ms

chemistryworld.com

chemistryworld.com

278 ms

www.chemistryworld.com

www.chemistryworld.com

405 ms

gpt.js

gpt.js

57 ms

core.css

core.css

155 ms

jquery.min.js

jquery.min.js

36 ms

global_2024.css

global_2024.css

339 ms

eme_2024.css

eme_2024.css

634 ms

spin_2024.css

spin_2024.css

638 ms

adsbygoogle.js

adsbygoogle.js

84 ms

core.js

core.js

283 ms

global_2024.js

global_2024.js

700 ms

index.min.js

index.min.js

42 ms

eme_2024.js

eme_2024.js

699 ms

spin_2024.js

spin_2024.js

739 ms

pubads_impl.js

pubads_impl.js

13 ms

print.css

print.css

75 ms

prum.min.js

prum.min.js

172 ms

templatejs

templatejs

1010 ms

gtm.js

gtm.js

178 ms

gtm.js

gtm.js

687 ms

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169 ms

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229 ms

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572 ms

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679 ms

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890 ms

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890 ms

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786 ms

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886 ms

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889 ms

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889 ms

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947 ms

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947 ms

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949 ms

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949 ms

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948 ms

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949 ms

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949 ms

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1340 ms

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949 ms

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949 ms

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950 ms

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950 ms

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951 ms

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952 ms

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951 ms

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951 ms

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952 ms

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952 ms

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954 ms

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953 ms

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953 ms

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953 ms

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954 ms

sprite.css-aea60e94.svg

sprite.css-aea60e94.svg

95 ms

ads

ads

420 ms

container.html

container.html

736 ms

PlantinLight.woff

PlantinLight.woff

409 ms

AvenirNextMedium.woff

AvenirNextMedium.woff

408 ms

AvenirNextLight.woff

AvenirNextLight.woff

723 ms

AvenirNextDemi.woff

AvenirNextDemi.woff

723 ms

AvenirNextBold.woff

AvenirNextBold.woff

722 ms

ads

ads

681 ms

ads

ads

709 ms

ads

ads

665 ms

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536149_2xx3545_534413.jpg

387 ms

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536143_gettyimages200156381001_300701.jpg

386 ms

536112_portrait_of_nicolas_minorsky_399152.jpg

536112_portrait_of_nicolas_minorsky_399152.jpg

386 ms

536050_gettyimages1246945636_490364_crop_crop.jpg

536050_gettyimages1246945636_490364_crop_crop.jpg

387 ms

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536099_c0593159haemoglobin_illustrationcopy_352229.jpg

386 ms

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281 ms

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282 ms

newslettersingleclick

newslettersingleclick

198 ms

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195 ms

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192 ms

most

most

186 ms

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82 ms

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535453_shutterstock_5564512511_63443_crop.jpg

73 ms

redirectcaptcha.htm

redirectcaptcha.htm

135 ms

api.js

api.js

38 ms

sprite.css-4705f15d.svg

sprite.css-4705f15d.svg

129 ms

reactionhero_578232.jpg

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4 ms

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3 ms

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3 ms

recaptcha__en.js

recaptcha__en.js

30 ms

Accessibility Review

chemistryworld.com accessibility score

96

Accessibility Issues

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.

Names and labels

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.

Impact

Issue

High

Links do not have a discernible name

Best Practices

chemistryworld.com best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

chemistryworld.com SEO score

91

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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 Chemistryworld.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 Chemistryworld.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

chemistryworld.com

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