Tools & Wizards About Us

Report Summary

  • 15

    Performance

    Renders faster than
    27% of other websites

  • 73

    Accessibility

    Visual factors better than
    that of 38% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

twiceinteraction.nl

ICT-training of IT-cursus volgen? Wij zijn jouw IT-kennispartner. | Computrain

Page Load Speed

4.5 sec in total

First Response

275 ms

Resources Loaded

4.1 sec

Page Rendered

117 ms

About Website

Visit twiceinteraction.nl now to see the best up-to-date Twiceinteraction content and also check out these interesting facts you probably never knew about twiceinteraction.nl

Wij bieden jou het grootste aanbod IT-trainingen van Nederland. Leer fysiek klassikaal, virtueel klassikaal of zelfstandig via e-learning.

Visit twiceinteraction.nl

Key Findings

We analyzed Twiceinteraction.nl page load time and found that the first response time was 275 ms and then it took 4.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

twiceinteraction.nl performance score

15

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.0 s

4/100

10%

LCP (Largest Contentful Paint)

Value7.8 s

3/100

25%

SI (Speed Index)

Value8.7 s

16/100

10%

TBT (Total Blocking Time)

Value5,630 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.135

80/100

15%

TTI (Time to Interactive)

Value16.9 s

5/100

10%

Network Requests Diagram

twiceinteraction.nl

275 ms

www.computrain.nl

522 ms

app.0f2e561c7be285eccc7b.css

247 ms

82.0f2e561c7be285eccc7b.css

332 ms

99.0f2e561c7be285eccc7b.css

339 ms

Our browser made a total of 83 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Twiceinteraction.nl, 77% (64 requests) were made to Computrain.nl and 14% (12 requests) were made to Image.opleidingsgroep.nl. The less responsive or slowest element that took the longest time to load (1.5 sec) relates to the external source Gtmss.ncoi.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 136.0 kB (45%)

Content Size

305.0 kB

After Optimization

168.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Twiceinteraction.nl main page is 305.0 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. 40% of websites need less resources to load. Images take 162.9 kB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 78.8 kB

  • Original 91.5 kB
  • After minification 85.1 kB
  • After compression 12.8 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. 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 78.8 kB or 86% of the original size.

Image Optimization

-26%

Potential reduce by 42.6 kB

  • Original 162.9 kB
  • After minification 120.2 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. Obviously, Twiceinteraction needs image optimization as it can save up to 42.6 kB or 26% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-19%

Potential reduce by 302 B

  • Original 1.6 kB
  • After minification 1.6 kB
  • After compression 1.3 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 302 B or 19% of the original size.

CSS Optimization

-29%

Potential reduce by 14.3 kB

  • Original 49.0 kB
  • After minification 48.9 kB
  • After compression 34.7 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. Twiceinteraction.nl needs all CSS files to be minified and compressed as it can save up to 14.3 kB or 29% of the original size.

Requests Breakdown

Number of requests can be reduced by 58 (77%)

Requests Now

75

After Optimization

17

  • Images
  • JavaScript
  • CSS

The browser has sent 75 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Twiceinteraction. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 43 to 1 for JavaScripts and from 17 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

twiceinteraction.nl accessibility score

73

Accessibility Issues

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

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

twiceinteraction.nl best practices score

83

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

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

twiceinteraction.nl SEO score

93

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

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 Twiceinteraction.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 Twiceinteraction.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

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