Access ou.nl. Homepage - Open Universiteit

Report Summary

About Website

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

Universitair studeren, zoals jij dat wilt. Van korte studie tot volledige bachelor en master. Persoonlijk en online, prima te combineren met werk en privé.

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name

value

score

weighting

FCP (First Contentful Paint)

Value7.4 s

1/100

10%

LCP (Largest Contentful Paint)

Value20.3 s

0/100

25%

SI (Speed Index)

Value9.8 s

10/100

10%

TBT (Total Blocking Time)

Value1,570 ms

13/100

30%

CLS (Cumulative Layout Shift)

Value0.044

99/100

15%

TTI (Time to Interactive)

Value20.4 s

2/100

10%

ou.nl

516 ms

www.ou.nl

1180 ms

jquery-2.2.4.min.js

208 ms

slick.min.js

311 ms

mediaelement-and-player.min.js

525 ms

Our browser made a total of 59 requests to load all elements on the main page. We found that 80% of them (47 requests) were addressed to the original Ou.nl, 8% (5 requests) were made to Google-analytics.com and 5% (3 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (2.2 sec) belongs to the original domain Ou.nl.

Content Size

6.3 MB

After Optimization

6.1 MB

In fact, the total size of Ou.nl main page is 6.3 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. 65% of websites need less resources to load. Images take 5.7 MB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 137.9 kB

Original 159.9 kB
After minification 121.8 kB
After compression 22.0 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 38.1 kB, which is 24% 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 137.9 kB or 86% of the original size.

Image Optimization

-1%

Potential reduce by 62.9 kB

Original 5.7 MB
After minification 5.6 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. Ou images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 1.8 kB

Original 442.5 kB
After minification 442.5 kB
After compression 440.7 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 Now

After Optimization

The browser has sent 49 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ou. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 23 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

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.

High

Buttons do not have an accessible name

High

Links do not have a discernible name

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

Search Engine Optimization Advices

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

High

Links are not crawlable

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/).

High

Document uses legible font sizes

Language and Encoding

Language Detected

NL
Language Claimed

NL
Encoding

UTF-8

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

ou.nl

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

Report Summary

Performance

Accessibility

Best Practices

SEO

Homepage - Open Universiteit - Open Universiteit

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)