Tools & Wizards About Us
jads.nl screenshot

Report Summary

  • 22

    Performance

    Renders faster than
    40% of other websites

  • 68

    Accessibility

    Visual factors better than
    that of 33% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

jads.nl

Jheronimus Academy of Data Science - JADS Data Science & AI education

Page Load Speed

4.8 sec in total

First Response

375 ms

Resources Loaded

3.8 sec

Page Rendered

714 ms

jads.nl screenshot

About Website

Click here to check amazing JADS content for Netherlands. Otherwise, check out these important facts you probably never knew about jads.nl

JADS offers Data Science bachelor and master programs, EngD education, executive education and helps organizations shape their data driven future.

Visit jads.nl

Key Findings

We analyzed Jads.nl page load time and found that the first response time was 375 ms and then it took 4.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

jads.nl performance score

22

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.0 s

9/100

10%

LCP (Largest Contentful Paint)

Value17.0 s

0/100

25%

SI (Speed Index)

Value12.1 s

4/100

10%

TBT (Total Blocking Time)

Value1,330 ms

17/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value15.7 s

6/100

10%

Network Requests Diagram

jads.nl

375 ms

www.jads.nl

1738 ms

gtm.js

81 ms

styles.css

1400 ms

jquery.min.js

1440 ms

Our browser made a total of 23 requests to load all elements on the main page. We found that 74% of them (17 requests) were addressed to the original Jads.nl, 9% (2 requests) were made to Widget-v4.tidiochat.com and 4% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1.7 sec) belongs to the original domain Jads.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 274.3 kB (71%)

Content Size

385.9 kB

After Optimization

111.6 kB

  • HTML
  • JavaScript

In fact, the total size of Jads.nl main page is 385.9 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. 60% of websites need less resources to load. HTML takes 385.3 kB which makes up the majority of the site volume.

HTML Optimization

-71%

Potential reduce by 274.2 kB

  • Original 385.3 kB
  • After minification 371.5 kB
  • After compression 111.1 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 274.2 kB or 71% of the original size.

JavaScript Optimization

-9%

Potential reduce by 53 B

  • Original 571 B
  • After minification 571 B
  • After compression 518 B

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 15 (75%)

Requests Now

20

After Optimization

5

  • Images
  • JavaScript
  • CSS

The browser has sent 20 CSS, Javascripts, AJAX and image requests in order to completely render the main page of JADS. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 16 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

jads.nl

jads.nl

375 ms

www.jads.nl

www.jads.nl

1738 ms

gtm.js

gtm.js

81 ms

styles.css

styles.css

1400 ms

jquery.min.js

jquery.min.js

1440 ms

jquery-migrate.min.js

jquery-migrate.min.js

1327 ms

app.js

app.js

501 ms

regenerator-runtime.min.js

regenerator-runtime.min.js

336 ms

wp-polyfill.min.js

wp-polyfill.min.js

389 ms

dom-ready.min.js

dom-ready.min.js

389 ms

hooks.min.js

hooks.min.js

390 ms

i18n.min.js

i18n.min.js

392 ms

a11y.min.js

a11y.min.js

390 ms

jquery.json.min.js

jquery.json.min.js

402 ms

gravityforms.min.js

gravityforms.min.js

440 ms

api.js

api.js

46 ms

obpdivzhud7oepfrk24lkurl0diqbei2.js

obpdivzhud7oepfrk24lkurl0diqbei2.js

442 ms

sprite.icons.svg

sprite.icons.svg

219 ms

dash.svg

dash.svg

136 ms

icon-select.svg

icon-select.svg

134 ms

render.d26cfa992228f00f13af.js

render.d26cfa992228f00f13af.js

47 ms

recaptcha__en.js

recaptcha__en.js

53 ms

widget.d26cfa992228f00f13af.js

widget.d26cfa992228f00f13af.js

19 ms

Accessibility Review

jads.nl accessibility score

68

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 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.

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

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

jads.nl best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

jads.nl 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

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Jads.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 Jads.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

jads.nl

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