Tools & Wizards About Us
organisation.leiden.edu screenshot

Report Summary

  • 57

    Performance

    Renders faster than
    74% of other websites

  • 78

    Accessibility

    Visual factors better than
    that of 46% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 91

    SEO

    Google-friendlier than
    71% of websites

organisation.leiden.edu

Organisational structure - Leiden University

Page Load Speed

2.4 sec in total

First Response

527 ms

Resources Loaded

1.7 sec

Page Rendered

97 ms

organisation.leiden.edu screenshot

About Website

Welcome to organisation.leiden.edu homepage info - get ready to check Organisation Leiden best content for Netherlands right away, or after learning these important things about organisation.leiden.edu

This website provides an overview of the organisational structure of Leiden University. Here you can find contact details of secretariats, staff lists by department, co-participation bodies, and regul...

Visit organisation.leiden.edu

Key Findings

We analyzed Organisation.leiden.edu page load time and found that the first response time was 527 ms and then it took 1.8 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.

Performance Metrics

organisation.leiden.edu performance score

57

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.7 s

31/100

10%

LCP (Largest Contentful Paint)

Value3.7 s

59/100

25%

SI (Speed Index)

Value8.8 s

15/100

10%

TBT (Total Blocking Time)

Value270 ms

82/100

30%

CLS (Cumulative Layout Shift)

Value0.241

52/100

15%

TTI (Time to Interactive)

Value6.9 s

54/100

10%

Network Requests Diagram

organisation.leiden.edu

527 ms

nbl.min.js

476 ms

main.css

571 ms

jquery-1.8.3.min.js

427 ms

rendition.js

179 ms

Our browser made a total of 23 requests to load all elements on the main page. We found that 17% of them (4 requests) were addressed to the original Organisation.leiden.edu, 65% (15 requests) were made to Live.leiden.edu and 13% (3 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (715 ms) relates to the external source Media.leidenuniv.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 28.4 kB (27%)

Content Size

103.7 kB

After Optimization

75.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Organisation.leiden.edu main page is 103.7 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. 15% of websites need less resources to load. Images take 50.6 kB which makes up the majority of the site volume.

HTML Optimization

-69%

Potential reduce by 4.1 kB

  • Original 6.0 kB
  • After minification 5.1 kB
  • After compression 1.8 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 882 B, which is 15% 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 4.1 kB or 69% of the original size.

Image Optimization

-1%

Potential reduce by 349 B

  • Original 50.6 kB
  • After minification 50.3 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. Organisation Leiden images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 34 B

  • Original 17.2 kB
  • After minification 17.2 kB
  • After compression 17.1 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.

CSS Optimization

-80%

Potential reduce by 23.9 kB

  • Original 29.9 kB
  • After minification 24.8 kB
  • After compression 6.1 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. Organisation.leiden.edu needs all CSS files to be minified and compressed as it can save up to 23.9 kB or 80% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (61%)

Requests Now

18

After Optimization

7

  • Images
  • JavaScript
  • CSS

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

Network Requests Diagram

organisation.leiden.edu

organisation.leiden.edu

527 ms

nbl.min.js

nbl.min.js

476 ms

main.css

main.css

571 ms

jquery-1.8.3.min.js

jquery-1.8.3.min.js

427 ms

rendition.js

rendition.js

179 ms

ga.js

ga.js

8 ms

ul_logo.png

ul_logo.png

107 ms

bnbig_default.jpg

bnbig_default.jpg

715 ms

ul_logo_print.png

ul_logo_print.png

194 ms

file_rss.png

file_rss.png

198 ms

crumb_chevron.png

crumb_chevron.png

98 ms

bkg_main.png

bkg_main.png

168 ms

bkg_btn.png

bkg_btn.png

179 ms

bkg_middle.png

bkg_middle.png

180 ms

arrow_right.png

arrow_right.png

196 ms

arrow_midsec.png

arrow_midsec.png

196 ms

arrow_left.png

arrow_left.png

258 ms

arrow_sidebar.png

arrow_sidebar.png

268 ms

crumb_overlay.png

crumb_overlay.png

269 ms

plugins.js

plugins.js

98 ms

print.css

print.css

98 ms

__utm.gif

__utm.gif

12 ms

__utm.gif

__utm.gif

13 ms

Accessibility Review

organisation.leiden.edu accessibility score

78

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

organisation.leiden.edu 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

organisation.leiden.edu SEO score

91

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

robots.txt is not valid

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 Organisation.leiden.edu 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 Organisation.leiden.edu 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

organisation.leiden.edu

Open Graph description is not detected on the main page of Organisation Leiden. 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: