Tools & Wizards About Us
humanitieslab.leidenuniv.nl screenshot

Report Summary

  • 46

    Performance

    Renders faster than
    64% of other websites

  • 76

    Accessibility

    Visual factors better than
    that of 42% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

humanitieslab.leidenuniv.nl

Humanities Lab - Leiden University

Page Load Speed

4 sec in total

First Response

468 ms

Resources Loaded

3.3 sec

Page Rendered

194 ms

humanitieslab.leidenuniv.nl screenshot

About Website

Welcome to humanitieslab.leidenuniv.nl homepage info - get ready to check Humanities Lab Leiden Univ best content for Netherlands right away, or after learning these important things about humanitieslab.leidenuniv.nl

Humanities make a difference!

Visit humanitieslab.leidenuniv.nl

Key Findings

We analyzed Humanitieslab.leidenuniv.nl page load time and found that the first response time was 468 ms and then it took 3.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

humanitieslab.leidenuniv.nl performance score

46

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.4 s

16/100

10%

LCP (Largest Contentful Paint)

Value5.5 s

18/100

25%

SI (Speed Index)

Value7.7 s

25/100

10%

TBT (Total Blocking Time)

Value60 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.575

12/100

15%

TTI (Time to Interactive)

Value6.6 s

58/100

10%

Network Requests Diagram

humanitieslab.leidenuniv.nl

468 ms

humanitieslab.leidenuniv.nl

449 ms

humanities-lab

789 ms

screen.css

190 ms

js

54 ms

Our browser made a total of 30 requests to load all elements on the main page. We found that 7% of them (2 requests) were addressed to the original Humanitieslab.leidenuniv.nl, 90% (27 requests) were made to Student.universiteitleiden.nl and 3% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (789 ms) relates to the external source Student.universiteitleiden.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 80.8 kB (68%)

Content Size

118.5 kB

After Optimization

37.7 kB

  • HTML
  • JavaScript

In fact, the total size of Humanitieslab.leidenuniv.nl main page is 118.5 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. HTML takes 97.5 kB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 80.7 kB

  • Original 97.5 kB
  • After minification 80.6 kB
  • After compression 16.7 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. This page needs HTML code to be minified as it can gain 16.8 kB, which is 17% 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 80.7 kB or 83% of the original size.

JavaScript Optimization

-0%

Potential reduce by 50 B

  • Original 21.0 kB
  • After minification 21.0 kB
  • After compression 20.9 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 17 (77%)

Requests Now

22

After Optimization

5

  • Images
  • JavaScript
  • CSS

The browser has sent 22 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Humanities Lab Leiden Univ. 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

humanitieslab.leidenuniv.nl

humanitieslab.leidenuniv.nl

468 ms

humanitieslab.leidenuniv.nl

humanitieslab.leidenuniv.nl

449 ms

humanities-lab

humanities-lab

789 ms

screen.css

screen.css

190 ms

js

js

54 ms

ul2.js

ul2.js

357 ms

zegel.png

zegel.png

107 ms

d50x50

d50x50

149 ms

world-map.png

world-map.png

191 ms

vestulapro-semibold.woff

vestulapro-semibold.woff

409 ms

vestulapro-regular.woff

vestulapro-regular.woff

450 ms

fontello.woff

fontello.woff

271 ms

vestulapro-regularitalic.woff

vestulapro-regularitalic.woff

178 ms

vestulapro-semibolditalic.woff

vestulapro-semibolditalic.woff

472 ms

jquery.js

jquery.js

338 ms

main.js

main.js

95 ms

anchors.js

anchors.js

95 ms

keep-hash.js

keep-hash.js

103 ms

links.js

links.js

100 ms

nav.js

nav.js

101 ms

search.js

search.js

102 ms

sub-nav-tree.js

sub-nav-tree.js

121 ms

suggest.js

suggest.js

187 ms

toggle.js

toggle.js

193 ms

text-filter.js

text-filter.js

198 ms

track-event.js

track-event.js

198 ms

video.js

video.js

197 ms

ajax-class.js

ajax-class.js

213 ms

locked.js

locked.js

279 ms

toolbar.js

toolbar.js

285 ms

Accessibility Review

humanitieslab.leidenuniv.nl accessibility score

76

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

humanitieslab.leidenuniv.nl 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

humanitieslab.leidenuniv.nl SEO score

91

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

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 Humanitieslab.leidenuniv.nl 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 Humanitieslab.leidenuniv.nl 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

humanitieslab.leidenuniv.nl

Open Graph description is not detected on the main page of Humanities Lab Leiden Univ. 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: