Tools & Wizards About Us
ruimtevaartindeklas.nl screenshot

Report Summary

  • 66

    Performance

    Renders faster than
    79% of other websites

  • 69

    Accessibility

    Visual factors better than
    that of 35% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 93

    SEO

    Google-friendlier than
    84% of websites

ruimtevaartindeklas.nl

ESERO | ESERO NL

Page Load Speed

3.6 sec in total

First Response

254 ms

Resources Loaded

2.3 sec

Page Rendered

1 sec

ruimtevaartindeklas.nl screenshot

About Website

Click here to check amazing Ruimtevaartindeklas content. Otherwise, check out these important facts you probably never knew about ruimtevaartindeklas.nl

Breng ruimtevaart in de klas met ESERO NL

Visit ruimtevaartindeklas.nl

Key Findings

We analyzed Ruimtevaartindeklas.nl page load time and found that the first response time was 254 ms and then it took 3.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

ruimtevaartindeklas.nl performance score

66

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.0 s

51/100

10%

LCP (Largest Contentful Paint)

Value8.3 s

2/100

25%

SI (Speed Index)

Value3.9 s

82/100

10%

TBT (Total Blocking Time)

Value120 ms

97/100

30%

CLS (Cumulative Layout Shift)

Value0.024

100/100

15%

TTI (Time to Interactive)

Value4.4 s

83/100

10%

Network Requests Diagram

ruimtevaartindeklas.nl

254 ms

www.ruimtevaartindeklas.nl

550 ms

webfont.js

8 ms

application-d2b9bbc7d2cba33618d65121e45fa3e5.css

237 ms

jquery.js

35 ms

Our browser made a total of 78 requests to load all elements on the main page. We found that 29% of them (23 requests) were addressed to the original Ruimtevaartindeklas.nl, 31% (24 requests) were made to Pbs.twimg.com and 13% (10 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Ruimtevaartindeklas.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 764.1 kB (8%)

Content Size

9.0 MB

After Optimization

8.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Ruimtevaartindeklas.nl main page is 9.0 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. 60% of websites need less resources to load. Images take 8.7 MB which makes up the majority of the site volume.

HTML Optimization

-66%

Potential reduce by 9.1 kB

  • Original 13.8 kB
  • After minification 13.8 kB
  • After compression 4.7 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. 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 9.1 kB or 66% of the original size.

Image Optimization

-6%

Potential reduce by 514.4 kB

  • Original 8.7 MB
  • After minification 8.2 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. Ruimtevaartindeklas images are well optimized though.

JavaScript Optimization

-65%

Potential reduce by 116.9 kB

  • Original 180.2 kB
  • After minification 176.5 kB
  • After compression 63.3 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 116.9 kB or 65% of the original size.

CSS Optimization

-85%

Potential reduce by 123.7 kB

  • Original 145.4 kB
  • After minification 120.4 kB
  • After compression 21.7 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. Ruimtevaartindeklas.nl needs all CSS files to be minified and compressed as it can save up to 123.7 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 13 (20%)

Requests Now

66

After Optimization

53

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 66 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ruimtevaartindeklas. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

ruimtevaartindeklas.nl

ruimtevaartindeklas.nl

254 ms

www.ruimtevaartindeklas.nl

www.ruimtevaartindeklas.nl

550 ms

webfont.js

webfont.js

8 ms

application-d2b9bbc7d2cba33618d65121e45fa3e5.css

application-d2b9bbc7d2cba33618d65121e45fa3e5.css

237 ms

jquery.js

jquery.js

35 ms

application-a793d92ff7a4228bbeaff25517b74896.js

application-a793d92ff7a4228bbeaff25517b74896.js

335 ms

Teachers_at_e-robotics_workshop.jpg

Teachers_at_e-robotics_workshop.jpg

1273 ms

RSA_nieuw.jpg

RSA_nieuw.jpg

613 ms

screenshot_wow.jpg

screenshot_wow.jpg

723 ms

spacescoop.jpg

spacescoop.jpg

793 ms

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Trace_Gas_Orbiter_Schiaparelli_and_the_ExoMars_rover_at_Mars.jpg

537 ms

ruimtevaartkalender_2016_klein.jpg

ruimtevaartkalender_2016_klein.jpg

558 ms

css

css

30 ms

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659 ms

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676 ms

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759 ms

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widgets.js

82 ms

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637 ms

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637 ms

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640 ms

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706 ms

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721 ms

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788 ms

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52 ms

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49 ms

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49 ms

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48 ms

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47 ms

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48 ms

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49 ms

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49 ms

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48 ms

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49 ms

fontawesome-webfont-b586905750c7934cb82ac9c3d7053a96.woff

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761 ms

yql

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302 ms

activiteiten.json

activiteiten.json

1106 ms

ga.js

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32 ms

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58 ms

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809 ms

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643 ms

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662 ms

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14 ms

syndication

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88 ms

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219 ms

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363 ms

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66 ms

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269 ms

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161 ms

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14 ms

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Accessibility Review

ruimtevaartindeklas.nl accessibility score

69

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.

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

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

ruimtevaartindeklas.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

High

Page has valid source maps

SEO Factors

ruimtevaartindeklas.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 Ruimtevaartindeklas.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 Ruimtevaartindeklas.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

ruimtevaartindeklas.nl

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