Tools & Wizards About Us
o2g2.nl screenshot

Report Summary

  • 49

    Performance

    Renders faster than
    67% of other websites

  • 56

    Accessibility

    Visual factors better than
    that of 24% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 99

    SEO

    Google-friendlier than
    93% of websites

o2g2.nl

Openbaar Onderwijs Groningen - Samen sterk in leren!

Page Load Speed

3.8 sec in total

First Response

359 ms

Resources Loaded

3.2 sec

Page Rendered

213 ms

o2g2.nl screenshot

About Website

Welcome to o2g2.nl homepage info - get ready to check O 2 G best content for Netherlands right away, or after learning these important things about o2g2.nl

Wij zijn een onderwijsorganisatie met 37 scholen onder onze hoede, in het basis-, voortgezet en speciaal onderwijs. En elke school heeft een eigen karakter.

Visit o2g2.nl

Key Findings

We analyzed O2g2.nl page load time and found that the first response time was 359 ms and then it took 3.4 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

o2g2.nl performance score

49

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.6 s

0/100

10%

LCP (Largest Contentful Paint)

Value13.0 s

0/100

25%

SI (Speed Index)

Value8.2 s

20/100

10%

TBT (Total Blocking Time)

Value100 ms

98/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value9.7 s

28/100

10%

Network Requests Diagram

o2g2.nl

359 ms

index.html

304 ms

js

73 ms

bootstrap.css

344 ms

style.css

531 ms

Our browser made a total of 45 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original O2g2.nl, 62% (28 requests) were made to Openbaaronderwijsgroningen.nl and 29% (13 requests) were made to Use.typekit.net. The less responsive or slowest element that took the longest time to load (847 ms) relates to the external source Openbaaronderwijsgroningen.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 410.0 kB (31%)

Content Size

1.3 MB

After Optimization

928.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of O2g2.nl main page is 1.3 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. 50% of websites need less resources to load. Images take 862.7 kB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 46.0 kB

  • Original 51.7 kB
  • After minification 39.1 kB
  • After compression 5.7 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 12.6 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 46.0 kB or 89% of the original size.

Image Optimization

-3%

Potential reduce by 24.7 kB

  • Original 862.7 kB
  • After minification 838.0 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. O 2 G images are well optimized though.

JavaScript Optimization

-69%

Potential reduce by 90.6 kB

  • Original 132.0 kB
  • After minification 127.9 kB
  • After compression 41.4 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 90.6 kB or 69% of the original size.

CSS Optimization

-85%

Potential reduce by 248.7 kB

  • Original 292.5 kB
  • After minification 248.0 kB
  • After compression 43.7 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. O2g2.nl needs all CSS files to be minified and compressed as it can save up to 248.7 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 14 (45%)

Requests Now

31

After Optimization

17

  • Images
  • JavaScript
  • CSS

The browser has sent 31 CSS, Javascripts, AJAX and image requests in order to completely render the main page of O 2 G. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

o2g2.nl

o2g2.nl

359 ms

index.html

index.html

304 ms

js

js

73 ms

bootstrap.css

bootstrap.css

344 ms

style.css

style.css

531 ms

all.min.css

all.min.css

447 ms

jquery-2.2.4.min.js

jquery-2.2.4.min.js

542 ms

jquery.validate.min.js

jquery.validate.min.js

48 ms

bootstrap.min.js

bootstrap.min.js

452 ms

bootstrap-filestyle.js

bootstrap-filestyle.js

275 ms

agm6jyw.js

agm6jyw.js

150 ms

style.css

style.css

371 ms

header_970_slogan.png

header_970_slogan.png

219 ms

logo_header.png

logo_header.png

202 ms

t_zoek_combi.png

t_zoek_combi.png

201 ms

t_menu_combi_.png

t_menu_combi_.png

201 ms

blauwstip.png

blauwstip.png

168 ms

t_pijlblauw.png

t_pijlblauw.png

168 ms

22448_big.png

22448_big.png

847 ms

blokbg.png

blokbg.png

168 ms

22449_big.jpg

22449_big.jpg

276 ms

22453_big.jpg

22453_big.jpg

275 ms

31781_big.jpg

31781_big.jpg

453 ms

22452_big.jpg

22452_big.jpg

361 ms

22450_big.jpg

22450_big.jpg

313 ms

banner.png

banner.png

331 ms

t_totop.png

t_totop.png

336 ms

footer_970_slogan.png

footer_970_slogan.png

400 ms

logo_blauw_970.png

logo_blauw_970.png

258 ms

22454.png

22454.png

266 ms

22455.png

22455.png

290 ms

22456.png

22456.png

325 ms

d

d

4 ms

d

d

27 ms

d

d

27 ms

d

d

27 ms

d

d

33 ms

d

d

33 ms

d

d

34 ms

d

d

107 ms

d

d

30 ms

d

d

31 ms

d

d

30 ms

d

d

32 ms

p.gif

p.gif

24 ms

Accessibility Review

o2g2.nl accessibility score

56

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

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

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

o2g2.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

o2g2.nl SEO score

99

Search Engine Optimization Advices

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

    NL

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise O2g2.nl can be misinterpreted by Google and other search engines. Our service has detected that Dutch is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that O2g2.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

o2g2.nl

Open Graph data is detected on the main page of O 2 G. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: