Tools & Wizards About Us
jardin-sciences.unistra.fr screenshot

Report Summary

  • 32

    Performance

    Renders faster than
    52% of other websites

  • 64

    Accessibility

    Visual factors better than
    that of 29% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

jardin-sciences.unistra.fr

Jardin des sciences - Université de Strasbourg - Accueil

Page Load Speed

5.9 sec in total

First Response

404 ms

Resources Loaded

5.2 sec

Page Rendered

373 ms

jardin-sciences.unistra.fr screenshot

About Website

Welcome to jardin-sciences.unistra.fr homepage info - get ready to check Jardin Sciences Unistra best content for France right away, or after learning these important things about jardin-sciences.unistra.fr

Visit jardin-sciences.unistra.fr

Key Findings

We analyzed Jardin-sciences.unistra.fr page load time and found that the first response time was 404 ms and then it took 5.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

jardin-sciences.unistra.fr performance score

32

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.7 s

61/100

10%

LCP (Largest Contentful Paint)

Value8.7 s

1/100

25%

SI (Speed Index)

Value6.9 s

33/100

10%

TBT (Total Blocking Time)

Value570 ms

52/100

30%

CLS (Cumulative Layout Shift)

Value0.391

26/100

15%

TTI (Time to Interactive)

Value9.5 s

30/100

10%

Network Requests Diagram

jardin-sciences.unistra.fr

404 ms

jardin-sciences.unistra.fr

1033 ms

merged-693333ed31dd72e48838e1959bca7072-4f2b119f258983e0381d710c9c501c9c.css

230 ms

jquery.min.js

18 ms

merged-9aa404cb5256d2845a1ecc1bf14fb84d-582add871d007879cec5ec9d29177a59.js

381 ms

Our browser made a total of 41 requests to load all elements on the main page. We found that 73% of them (30 requests) were addressed to the original Jardin-sciences.unistra.fr, 17% (7 requests) were made to S3.unistra.fr and 5% (2 requests) were made to Webomat.unistra.fr. The less responsive or slowest element that took the longest time to load (3.2 sec) belongs to the original domain Jardin-sciences.unistra.fr.

Page Optimization Overview & Recommendations

Page size can be reduced by 679.8 kB (7%)

Content Size

9.3 MB

After Optimization

8.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Jardin-sciences.unistra.fr main page is 9.3 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 8.4 MB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 99.6 kB

  • Original 112.2 kB
  • After minification 99.3 kB
  • After compression 12.6 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 12.9 kB, which is 12% 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 99.6 kB or 89% of the original size.

Image Optimization

-2%

Potential reduce by 199.6 kB

  • Original 8.4 MB
  • After minification 8.2 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. Jardin Sciences Unistra images are well optimized though.

JavaScript Optimization

-55%

Potential reduce by 380.4 kB

  • Original 686.9 kB
  • After minification 686.9 kB
  • After compression 306.5 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 380.4 kB or 55% of the original size.

CSS Optimization

-0%

Potential reduce by 187 B

  • Original 61.8 kB
  • After minification 61.8 kB
  • After compression 61.6 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. Jardin-sciences.unistra.fr has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 4 (13%)

Requests Now

32

After Optimization

28

  • Images
  • JavaScript
  • CSS

The browser has sent 32 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jardin Sciences Unistra. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

jardin-sciences.unistra.fr

jardin-sciences.unistra.fr

404 ms

jardin-sciences.unistra.fr

jardin-sciences.unistra.fr

1033 ms

merged-693333ed31dd72e48838e1959bca7072-4f2b119f258983e0381d710c9c501c9c.css

merged-693333ed31dd72e48838e1959bca7072-4f2b119f258983e0381d710c9c501c9c.css

230 ms

jquery.min.js

jquery.min.js

18 ms

merged-9aa404cb5256d2845a1ecc1bf14fb84d-582add871d007879cec5ec9d29177a59.js

merged-9aa404cb5256d2845a1ecc1bf14fb84d-582add871d007879cec5ec9d29177a59.js

381 ms

merged-2428f85c1215d6ea7f829cc621389da0-5cea05051b93da1043404308cf6c12bf.js

merged-2428f85c1215d6ea7f829cc621389da0-5cea05051b93da1043404308cf6c12bf.js

447 ms

m.js

m.js

1536 ms

picto-jds.svg

picto-jds.svg

111 ms

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1275 ms

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1180 ms

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1082 ms

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csm_Header_formation_ab7dba3d59.jpg

1364 ms

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1378 ms

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1412 ms

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1820 ms

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1606 ms

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1765 ms

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1606 ms

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1558 ms

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3162 ms

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1650 ms

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1693 ms

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1737 ms

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1740 ms

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1792 ms

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1808 ms

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1848 ms

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1876 ms

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csm_Vue_aerienne_observatoire._Frantisek_Zvardon_%40_Region_Grand-Est__Inventaire_general_-_Universite_de_Strasbourg__Jardin_des_sciences_8f39eb8633.jpg

1895 ms

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1914 ms

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1926 ms

planetarium_.png

planetarium_.png

1960 ms

UnistraA-Regular.woff

UnistraA-Regular.woff

1392 ms

UnistraA-Bold.woff

UnistraA-Bold.woff

1518 ms

unistrasymbol-webfont.woff

unistrasymbol-webfont.woff

1414 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

1606 ms

UnistraA-Italic.woff

UnistraA-Italic.woff

1470 ms

UnistraA-BoldItalic.woff

UnistraA-BoldItalic.woff

1562 ms

novaicons.woff

novaicons.woff

1516 ms

recaptcha__en.js

recaptcha__en.js

22 ms

m.php

m.php

182 ms

Accessibility Review

jardin-sciences.unistra.fr accessibility score

64

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

[aria-*] attributes do not match their roles

High

[aria-hidden="true"] elements contain focusable descendents

High

ARIA input fields do not have accessible names

High

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

High

[role]s are not contained by their required parent element

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

Best Practices

jardin-sciences.unistra.fr 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

jardin-sciences.unistra.fr SEO score

83

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 Jardin-sciences.unistra.fr 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 Jardin-sciences.unistra.fr 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

jardin-sciences.unistra.fr

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