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21stcenturysciencetech.com screenshot

Report Summary

  • 86

    Performance

    Renders faster than
    89% of other websites

  • 63

    Accessibility

    Visual factors better than
    that of 28% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 58

    SEO

    Google-friendlier than
    20% of websites

21stcenturysciencetech.com

21st Century Home Page

Page Load Speed

4.6 sec in total

First Response

1.7 sec

Resources Loaded

2 sec

Page Rendered

930 ms

21stcenturysciencetech.com screenshot

About Website

Visit 21stcenturysciencetech.com now to see the best up-to-date 21st Century Sciencetech content for United States and also check out these interesting facts you probably never knew about 21stcenturysciencetech.com

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Key Findings

We analyzed 21stcenturysciencetech.com page load time and found that the first response time was 1.7 sec and then it took 2.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

21stcenturysciencetech.com performance score

86

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.7 s

92/100

10%

LCP (Largest Contentful Paint)

Value4.1 s

47/100

25%

SI (Speed Index)

Value1.7 s

100/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value1.7 s

100/100

10%

Network Requests Diagram

21stcenturysciencetech.com

1710 ms

tarantula_ctio.jpg

113 ms

bulletcluster_comp_f2048.jpg

85 ms

Black_box.jpg

59 ms

weakforce.jpg

60 ms

Our browser made a total of 47 requests to load all elements on the main page. We found that all of those requests were addressed to 21stcenturysciencetech.com and no external sources were called. The less responsive or slowest element that took the longest time to load (1.7 sec) belongs to the original domain 21stcenturysciencetech.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 86.2 kB (13%)

Content Size

662.9 kB

After Optimization

576.7 kB

  • HTML
  • Images

In fact, the total size of 21stcenturysciencetech.com main page is 662.9 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 35% of websites need less resources to load. Images take 600.1 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 51.1 kB

  • Original 62.7 kB
  • After minification 57.4 kB
  • After compression 11.7 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 51.1 kB or 81% of the original size.

Image Optimization

-6%

Potential reduce by 35.1 kB

  • Original 600.1 kB
  • After minification 565.0 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. 21st Century Sciencetech images are well optimized though.

Requests Breakdown

We found no issues to fix!

Requests Now

46

After Optimization

46

  • Images

The browser has sent 46 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 21st Century Sciencetech. According to our analytics all requests are already optimized.

Network Requests Diagram

21stcenturysciencetech.com

21stcenturysciencetech.com

1710 ms

tarantula_ctio.jpg

tarantula_ctio.jpg

113 ms

bulletcluster_comp_f2048.jpg

bulletcluster_comp_f2048.jpg

85 ms

Black_box.jpg

Black_box.jpg

59 ms

weakforce.jpg

weakforce.jpg

60 ms

Anopheles_DDT.jpg

Anopheles_DDT.jpg

60 ms

econDevel.gif

econDevel.gif

74 ms

GW.jpg

GW.jpg

86 ms

KoreaNukeIcon.jpg

KoreaNukeIcon.jpg

87 ms

moon_model.jpg

moon_model.jpg

87 ms

youth_movement.jpg

youth_movement.jpg

101 ms

SciClassics.gif

SciClassics.gif

112 ms

Space.jpg

Space.jpg

115 ms

aSu13_Cover.jpg

aSu13_Cover.jpg

115 ms

a_F-W12_Cover.jpg

a_F-W12_Cover.jpg

116 ms

aW11_Cover.jpg

aW11_Cover.jpg

128 ms

aSu11_Cover.jpg

aSu11_Cover.jpg

139 ms

aW10_Cover.jpg

aW10_Cover.jpg

139 ms

aSu10_Cover.jpg

aSu10_Cover.jpg

142 ms

aW09_Cover.jpg

aW09_Cover.jpg

142 ms

aSu09_Cover.jpg

aSu09_Cover.jpg

144 ms

aFW08_Cover.jpg

aFW08_Cover.jpg

156 ms

aSp08_Cover.jpg

aSp08_Cover.jpg

169 ms

aF07_Cover.jpg

aF07_Cover.jpg

166 ms

aFW06_Cover.jpg

aFW06_Cover.jpg

169 ms

aSp13_Cover.jpg

aSp13_Cover.jpg

169 ms

aSp-Su12_Cover.jpg

aSp-Su12_Cover.jpg

175 ms

aF11_Cover.jpg

aF11_Cover.jpg

181 ms

aSp11_Cover.jpg

aSp11_Cover.jpg

193 ms

aF10_Cover.jpg

aF10_Cover.jpg

198 ms

aSp10_Cover.jpg

aSp10_Cover.jpg

195 ms

aF09_Cover.jpg

aF09_Cover.jpg

196 ms

aSp09_Cover.jpg

aSp09_Cover.jpg

204 ms

aSu08_Cover.jpg

aSu08_Cover.jpg

208 ms

aW07_Cover.jpg

aW07_Cover.jpg

220 ms

aSu07_Cover.jpg

aSu07_Cover.jpg

224 ms

aSp06_Cover.jpg

aSp06_Cover.jpg

183 ms

F-W_2013_Cover_Medium.jpg

F-W_2013_Cover_Medium.jpg

236 ms

PDF_2.gif

PDF_2.gif

235 ms

Brillouin_Reactor_Core.jpg

Brillouin_Reactor_Core.jpg

235 ms

150_Years_Vernadsky-1.jpg

150_Years_Vernadsky-1.jpg

239 ms

150_Years_Vernadsky-2.jpg

150_Years_Vernadsky-2.jpg

261 ms

Prometheus_cover_225.jpg

Prometheus_cover_225.jpg

213 ms

Nuclear_NAWAPA_cover.jpg

Nuclear_NAWAPA_cover.jpg

217 ms

Astrobio_event.jpg

Astrobio_event.jpg

210 ms

Jaworowski.jpg

Jaworowski.jpg

202 ms

Calabrese.jpg

Calabrese.jpg

196 ms

Accessibility Review

21stcenturysciencetech.com accessibility score

63

Accessibility Issues

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

21stcenturysciencetech.com best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

SEO Factors

21stcenturysciencetech.com SEO score

58

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

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 21stcenturysciencetech.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that 21stcenturysciencetech.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

21stcenturysciencetech.com

Open Graph description is not detected on the main page of 21st Century Sciencetech. 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: