Tools & Wizards About Us
chemistryweek.org screenshot

Report Summary

  • 46

    Performance

    Renders faster than
    64% of other websites

  • 90

    Accessibility

    Visual factors better than
    that of 74% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 81

    SEO

    Google-friendlier than
    42% of websites

chemistryweek.org

National Chemistry Week (NCW) - American Chemical Society

Page Load Speed

1.5 sec in total

First Response

82 ms

Resources Loaded

924 ms

Page Rendered

499 ms

chemistryweek.org screenshot

About Website

Welcome to chemistryweek.org homepage info - get ready to check Chemistry Week best content right away, or after learning these important things about chemistryweek.org

National Chemistry Week is a public awareness campaign that promotes the value of chemistry in everyday life. NCW occurs annually the third week in October.

Visit chemistryweek.org

Key Findings

We analyzed Chemistryweek.org page load time and found that the first response time was 82 ms and then it took 1.4 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

chemistryweek.org performance score

46

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.3 s

39/100

10%

LCP (Largest Contentful Paint)

Value8.4 s

2/100

25%

SI (Speed Index)

Value4.1 s

80/100

10%

TBT (Total Blocking Time)

Value500 ms

57/100

30%

CLS (Cumulative Layout Shift)

Value0.069

96/100

15%

TTI (Time to Interactive)

Value12.0 s

16/100

10%

Network Requests Diagram

chemistryweek.org

82 ms

ncw.html

18 ms

ncw.html

76 ms

national-chemistry-week.html

8 ms

acs-bootstrap.css

305 ms

Our browser made a total of 51 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Chemistryweek.org, 80% (41 requests) were made to Acs.org and 14% (7 requests) were made to Assetscloud.acs.org. The less responsive or slowest element that took the longest time to load (443 ms) relates to the external source Assetscloud.acs.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.0 MB (35%)

Content Size

2.9 MB

After Optimization

1.9 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Chemistryweek.org 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. 55% of websites need less resources to load. Images take 2.3 MB which makes up the majority of the site volume.

HTML Optimization

-90%

Potential reduce by 121.5 kB

  • Original 135.4 kB
  • After minification 97.0 kB
  • After compression 13.9 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 38.3 kB, which is 28% 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 121.5 kB or 90% of the original size.

Image Optimization

-25%

Potential reduce by 561.8 kB

  • Original 2.3 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. Obviously, Chemistry Week needs image optimization as it can save up to 561.8 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

-65%

Potential reduce by 287.1 kB

  • Original 441.9 kB
  • After minification 441.9 kB
  • After compression 154.8 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 287.1 kB or 65% of the original size.

CSS Optimization

-47%

Potential reduce by 37.3 kB

  • Original 80.0 kB
  • After minification 66.6 kB
  • After compression 42.6 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. Chemistryweek.org needs all CSS files to be minified and compressed as it can save up to 37.3 kB or 47% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (24%)

Requests Now

45

After Optimization

34

  • Images
  • JavaScript
  • CSS

The browser has sent 45 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chemistry Week. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

chemistryweek.org

chemistryweek.org

82 ms

ncw.html

ncw.html

18 ms

ncw.html

ncw.html

76 ms

national-chemistry-week.html

national-chemistry-week.html

8 ms

acs-bootstrap.css

acs-bootstrap.css

305 ms

components.lc-e980ea1cfd0435b9fe684ab5674b4384-lc.min.css

components.lc-e980ea1cfd0435b9fe684ab5674b4384-lc.min.css

5 ms

main.css

main.css

134 ms

acs.min.js

acs.min.js

443 ms

components.lc-eadf99378f63e512d86bb6634ce31f88-lc.min.js

components.lc-eadf99378f63e512d86bb6634ce31f88-lc.min.js

9 ms

launch-758c59e3763b.min.js

launch-758c59e3763b.min.js

59 ms

print.css

print.css

4 ms

acs-logo.svg

acs-logo.svg

124 ms

1724872548061.jpg

1724872548061.jpg

102 ms

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1708704680529.jpg

103 ms

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1708704842592.png

102 ms

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1722966059015.jpg

102 ms

1708704769876.png

1708704769876.png

109 ms

1708704811875.jpg

1708704811875.jpg

106 ms

ncw-2024-hero-v3.png.scale.large.1600.png

ncw-2024-hero-v3.png.scale.large.1600.png

110 ms

ncw-2024-logo-only-v3.png

ncw-2024-logo-only-v3.png

111 ms

1690546005236.png

1690546005236.png

105 ms

1722265270751.jpg

1722265270751.jpg

173 ms

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1724960368515.jpg

173 ms

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175 ms

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1722265275604.jpg

118 ms

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1599161411667.png

113 ms

1599161462932.png

1599161462932.png

119 ms

1599161481623.png

1599161481623.png

119 ms

stats-img-1.jpg

stats-img-1.jpg

123 ms

stats-img-2.png

stats-img-2.png

126 ms

stats-img-3.jpg

stats-img-3.jpg

126 ms

stats-img-4.png

stats-img-4.png

133 ms

1568221384556.jpg

1568221384556.jpg

130 ms

1659381651477.jpg

1659381651477.jpg

128 ms

1659037117965.jpg

1659037117965.jpg

131 ms

1659037356246.jpg

1659037356246.jpg

132 ms

fylc-bg.png.scale.large.1600.png

fylc-bg.png.scale.large.1600.png

143 ms

fylc-map.svg

fylc-map.svg

136 ms

contact-icon.svg

contact-icon.svg

134 ms

facebook-logo.svg

facebook-logo.svg

144 ms

x-logo.svg

x-logo.svg

145 ms

acs-logo-white.svg

acs-logo-white.svg

145 ms

linkedin-logo.svg

linkedin-logo.svg

146 ms

instagram-logo.svg

instagram-logo.svg

147 ms

icon-search.svg

icon-search.svg

201 ms

icon-menu.svg

icon-menu.svg

210 ms

icon-close.svg

icon-close.svg

205 ms

icon-search-blue.svg

icon-search-blue.svg

206 ms

prum.min.js

prum.min.js

49 ms

opensans-variablefont.woff

opensans-variablefont.woff

254 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

58 ms

Accessibility Review

chemistryweek.org accessibility score

90

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

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

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

chemistryweek.org best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

chemistryweek.org SEO score

81

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

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 Chemistryweek.org 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 Chemistryweek.org 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

chemistryweek.org

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