Tools & Wizards About Us
espace-sciences.org screenshot

Report Summary

  • 3

    Performance

    Renders faster than
    20% of other websites

  • 63

    Accessibility

    Visual factors better than
    that of 28% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

espace-sciences.org

Chez vous | Espace des sciences

Page Load Speed

10.3 sec in total

First Response

288 ms

Resources Loaded

9.7 sec

Page Rendered

344 ms

espace-sciences.org screenshot

About Website

Click here to check amazing Espace Sciences content for France. Otherwise, check out these important facts you probably never knew about espace-sciences.org

Expositions scientifiques, animations, planétarium, conférences, revue Sciences Ouest : l'Espace des sciences le centre de culture scientifique de Rennes, en Bretagne.

Visit espace-sciences.org

Key Findings

We analyzed Espace-sciences.org page load time and found that the first response time was 288 ms and then it took 10 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

espace-sciences.org performance score

3

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.9 s

10/100

10%

LCP (Largest Contentful Paint)

Value30.0 s

0/100

25%

SI (Speed Index)

Value10.3 s

8/100

10%

TBT (Total Blocking Time)

Value3,950 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.971

2/100

15%

TTI (Time to Interactive)

Value15.9 s

6/100

10%

Network Requests Diagram

espace-sciences.org

288 ms

www.espace-sciences.org

3752 ms

addthis_widget.js

26 ms

js

94 ms

aggregator.css

171 ms

Our browser made a total of 267 requests to load all elements on the main page. We found that 67% of them (179 requests) were addressed to the original Espace-sciences.org, 6% (17 requests) were made to Maps.googleapis.com and 5% (13 requests) were made to Static.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (3.8 sec) belongs to the original domain Espace-sciences.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 2.7 MB (46%)

Content Size

5.8 MB

After Optimization

3.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Espace-sciences.org main page is 5.8 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. 85% 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. Images take 2.8 MB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 432.0 kB

  • Original 485.5 kB
  • After minification 474.8 kB
  • After compression 53.4 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 432.0 kB or 89% of the original size.

Image Optimization

-12%

Potential reduce by 327.8 kB

  • Original 2.8 MB
  • After minification 2.5 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, Espace Sciences needs image optimization as it can save up to 327.8 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-69%

Potential reduce by 1.1 MB

  • Original 1.6 MB
  • After minification 1.5 MB
  • After compression 478.6 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 1.1 MB or 69% of the original size.

CSS Optimization

-87%

Potential reduce by 824.6 kB

  • Original 945.6 kB
  • After minification 850.4 kB
  • After compression 121.0 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. Espace-sciences.org needs all CSS files to be minified and compressed as it can save up to 824.6 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 122 (47%)

Requests Now

260

After Optimization

138

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 260 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Espace Sciences. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 44 to 1 for JavaScripts and from 55 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

espace-sciences.org

espace-sciences.org

288 ms

www.espace-sciences.org

www.espace-sciences.org

3752 ms

addthis_widget.js

addthis_widget.js

26 ms

js

js

94 ms

aggregator.css

aggregator.css

171 ms

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defaults.css

176 ms

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184 ms

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184 ms

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257 ms

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263 ms

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261 ms

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marker.js

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StaticMapService.GetMapImage

StaticMapService.GetMapImage

282 ms

banner

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108 ms

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347 ms

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ViewportInfoService.GetViewportInfo

ViewportInfoService.GetViewportInfo

175 ms

stats.js

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87 ms

controls.js

controls.js

119 ms

647 ms

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AuthenticationService.Authenticate

AuthenticationService.Authenticate

543 ms

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334 ms

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333 ms

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943 ms

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275 ms

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Accessibility Review

espace-sciences.org accessibility score

63

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.

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

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

espace-sciences.org best practices score

75

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

espace-sciences.org SEO score

92

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

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

    FR

  • Language Claimed

    FR

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Espace-sciences.org can be misinterpreted by Google and other search engines. Our service has detected that French is used on the page, and it matches the claimed language. Our system also found out that Espace-sciences.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

espace-sciences.org

Open Graph description is not detected on the main page of Espace Sciences. 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: