Tools & Wizards About Us
esa.int screenshot

Report Summary

  • 52

    Performance

    Renders faster than
    70% of other websites

  • 64

    Accessibility

    Visual factors better than
    that of 30% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

esa.int

European Space Agency

Page Load Speed

1.5 sec in total

First Response

311 ms

Resources Loaded

928 ms

Page Rendered

234 ms

esa.int screenshot

About Website

Click here to check amazing Esa content for China. Otherwise, check out these important facts you probably never knew about esa.int

The European Space Agency portal features the latest news in space exploration, human spaceflight, launchers, telecommunications, navigation, monitoring and space science.

Visit esa.int

Key Findings

We analyzed Esa.int page load time and found that the first response time was 311 ms and then it took 1.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

esa.int performance score

52

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.2 s

44/100

10%

LCP (Largest Contentful Paint)

Value8.0 s

2/100

25%

SI (Speed Index)

Value4.8 s

66/100

10%

TBT (Total Blocking Time)

Value270 ms

82/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value13.6 s

11/100

10%

Network Requests Diagram

esa.int

311 ms

www.esa.int

13 ms

ESA

100 ms

9d3688494d0a8dc6802c07dfe11a1bdc_1456135701_all.css

98 ms

ed2b43b3c2fc98db4a27ff09bee18fcf_1444843331.js

233 ms

Our browser made a total of 96 requests to load all elements on the main page. We found that 97% of them (93 requests) were addressed to the original Esa.int, 3% (3 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (311 ms) belongs to the original domain Esa.int.

Page Optimization Overview & Recommendations

Page size can be reduced by 445.6 kB (25%)

Content Size

1.8 MB

After Optimization

1.3 MB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Esa.int 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. 60% of websites need less resources to load. Images take 1.6 MB which makes up the majority of the site volume.

HTML Optimization

-93%

Potential reduce by 139.6 kB

  • Original 150.2 kB
  • After minification 53.2 kB
  • After compression 10.6 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 97.1 kB, which is 65% 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 139.6 kB or 93% of the original size.

Image Optimization

-19%

Potential reduce by 306.0 kB

  • Original 1.6 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. Obviously, Esa needs image optimization as it can save up to 306.0 kB or 19% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-0%

Potential reduce by 48 B

  • Original 17.9 kB
  • After minification 17.9 kB
  • After compression 17.8 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. This website has mostly compressed JavaScripts.

Requests Breakdown

Number of requests can be reduced by 29 (32%)

Requests Now

91

After Optimization

62

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 91 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Esa. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 18 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

esa.int

esa.int

311 ms

www.esa.int

www.esa.int

13 ms

ESA

ESA

100 ms

9d3688494d0a8dc6802c07dfe11a1bdc_1456135701_all.css

9d3688494d0a8dc6802c07dfe11a1bdc_1456135701_all.css

98 ms

ed2b43b3c2fc98db4a27ff09bee18fcf_1444843331.js

ed2b43b3c2fc98db4a27ff09bee18fcf_1444843331.js

233 ms

slides.esa.jquery.js

slides.esa.jquery.js

26 ms

jquery.highlights.slide.js

jquery.highlights.slide.js

19 ms

jquery.misnav_ez.js

jquery.misnav_ez.js

23 ms

848199fec86011295a1c19774bf7195f_1354906741.js

848199fec86011295a1c19774bf7195f_1354906741.js

21 ms

jquery.quickupdates.slide.js

jquery.quickupdates.slide.js

34 ms

star_rating.css

star_rating.css

23 ms

jquery.trending.js

jquery.trending.js

47 ms

43c61157cd19d6d13fed6d93151c7991_1446833698.js

43c61157cd19d6d13fed6d93151c7991_1446833698.js

44 ms

ga.js

ga.js

21 ms

edge_left.png

edge_left.png

36 ms

sb_bg.gif

sb_bg.gif

19 ms

sb_sep.gif

sb_sep.gif

17 ms

ESA.jpg

ESA.jpg

26 ms

esa_shadow.png

esa_shadow.png

28 ms

Thick_green_fog_of_aurora_highlight.jpg

Thick_green_fog_of_aurora_highlight.jpg

27 ms

Euronews_Moon_Village_highlight.jpg

Euronews_Moon_Village_highlight.jpg

35 ms

ExoMars_2016_fairing_release_highlight.jpg

ExoMars_2016_fairing_release_highlight.jpg

63 ms

Galileo_satellites_atop_Soyuz_latestnews.jpg

Galileo_satellites_atop_Soyuz_latestnews.jpg

36 ms

nl_bg.png

nl_bg.png

27 ms

Carbon_flux_latestnews.png

Carbon_flux_latestnews.png

60 ms

Fatu_Huku_latestnews.jpg

Fatu_Huku_latestnews.jpg

60 ms

LISA_Pathfinder_operating_in_space_latestnews.jpg

LISA_Pathfinder_operating_in_space_latestnews.jpg

61 ms

Satellite_antenna_on_cabin_roof_latestnews.jpg

Satellite_antenna_on_cabin_roof_latestnews.jpg

63 ms

Arda_Valles_latestnews.jpg

Arda_Valles_latestnews.jpg

64 ms

Vehicle_demonstration_latestnews.jpg

Vehicle_demonstration_latestnews.jpg

66 ms

Sentinel-3A_liftoff_latestnews.jpg

Sentinel-3A_liftoff_latestnews.jpg

62 ms

Jan_Woerner_during_the_annual_press_briefing_on_15_January_2016_medium.jpg

Jan_Woerner_during_the_annual_press_briefing_on_15_January_2016_medium.jpg

112 ms

fl_bg.png

fl_bg.png

66 ms

Final_suit_fit_check_prior_to_Friday_s_EVA_medium.jpg

Final_suit_fit_check_prior_to_Friday_s_EVA_medium.jpg

69 ms

Schiaparelli_separating_from_Trace_Gas_Orbiter_medium.jpg

Schiaparelli_separating_from_Trace_Gas_Orbiter_medium.jpg

110 ms

ESA_Euronews_Moon_Village_medium.jpg

ESA_Euronews_Moon_Village_medium.jpg

86 ms

esainyourcountry.png

esainyourcountry.png

86 ms

germany.png

germany.png

86 ms

austria.png

austria.png

87 ms

belgium%20-%20fran%C3%A7ais.png

belgium%20-%20fran%C3%A7ais.png

108 ms

denmark.png

denmark.png

155 ms

spain.png

spain.png

133 ms

finland.png

finland.png

112 ms

estonia.png

estonia.png

107 ms

france.png

france.png

109 ms

greece.png

greece.png

122 ms

hungary.png

hungary.png

111 ms

ireland.png

ireland.png

111 ms

italy.png

italy.png

144 ms

luxembourg.png

luxembourg.png

123 ms

norway.png

norway.png

99 ms

NotesEsaBol.ttf

NotesEsaBol.ttf

127 ms

inpage_linkid.js

inpage_linkid.js

8 ms

the%20netherlands.png

the%20netherlands.png

107 ms

poland.png

poland.png

126 ms

portugal.png

portugal.png

125 ms

czech%20republic.png

czech%20republic.png

107 ms

romania.png

romania.png

109 ms

united%20kingdom.png

united%20kingdom.png

138 ms

sweden.png

sweden.png

136 ms

__utm.gif

__utm.gif

29 ms

switzerland%20-%20italiano.png

switzerland%20-%20italiano.png

107 ms

Eastern_Desert_rnb_large.jpg

Eastern_Desert_rnb_large.jpg

114 ms

esaarw14px.png

esaarw14px.png

95 ms

Sentinel-3A_liftoff_rnb_large.jpg

Sentinel-3A_liftoff_rnb_large.jpg

117 ms

Eastern_Desert_latestnews.jpg

Eastern_Desert_latestnews.jpg

132 ms

views.png

views.png

144 ms

notesstyle-boldtf-webfont.ttf

notesstyle-boldtf-webfont.ttf

126 ms

playbtn_l.png

playbtn_l.png

109 ms

esa_connect.png

esa_connect.png

107 ms

oop-min.js

oop-min.js

94 ms

esa_subscribe.png

esa_subscribe.png

94 ms

mobile.png

mobile.png

95 ms

hl_bg.jpg

hl_bg.jpg

114 ms

esauxt::mostviewed_t

esauxt::mostviewed_t

95 ms

hl_arw_left.png

hl_arw_left.png

80 ms

hl_arw_right.png

hl_arw_right.png

93 ms

hl_pause.gif

hl_pause.gif

138 ms

hl_dot.gif

hl_dot.gif

84 ms

dot.gif

dot.gif

89 ms

playbtn.png

playbtn.png

88 ms

cloud_bg.jpg

cloud_bg.jpg

97 ms

sb_search_bg.gif

sb_search_bg.gif

88 ms

sb_search_btn.gif

sb_search_btn.gif

118 ms

arw_d.gif

arw_d.gif

97 ms

star.gif

star.gif

71 ms

ESA_Euronews_Moon_Village_latestnews.jpg

ESA_Euronews_Moon_Village_latestnews.jpg

91 ms

ESA.jpg

ESA.jpg

93 ms

edge_right.png

edge_right.png

73 ms

event-custom-base-min.js

event-custom-base-min.js

32 ms

dom-core-min.js

dom-core-min.js

4 ms

dom-base-min.js

dom-base-min.js

5 ms

selector-native-min.js

selector-native-min.js

6 ms

selector-min.js

selector-min.js

4 ms

node-core-min.js

node-core-min.js

5 ms

node-base-min.js

node-base-min.js

4 ms

Accessibility Review

esa.int accessibility score

64

Accessibility Issues

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

Buttons do not have an accessible name

High

Links do not have a discernible name

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

These items highlight common accessibility best practices.

Impact

Issue

High

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

Best Practices

esa.int 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

SEO Factors

esa.int SEO score

92

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

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 Esa.int 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 Esa.int 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

esa.int

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