Tools & Wizards About Us
cstt.nl screenshot

Report Summary

  • 61

    Performance

    Renders faster than
    76% of other websites

  • 56

    Accessibility

    Visual factors better than
    that of 23% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 64

    SEO

    Google-friendlier than
    24% of websites

cstt.nl

Centre for Sustainability, Tourism and Transport (CSTT) — BUas Research Portal

Page Load Speed

3.1 sec in total

First Response

432 ms

Resources Loaded

2.2 sec

Page Rendered

412 ms

cstt.nl screenshot

About Website

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

nbsp KEYWORDSLINKSnbspair transport nbspcarbon footprint carbon management carbon offsets CARMACAL CARMATOP climate change climate policy nbspcoach travel cruise tourism cycle tourism ...

Visit cstt.nl

Key Findings

We analyzed Cstt.nl page load time and found that the first response time was 432 ms and then it took 2.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

cstt.nl performance score

61

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.3 s

39/100

10%

LCP (Largest Contentful Paint)

Value4.5 s

36/100

25%

SI (Speed Index)

Value4.9 s

65/100

10%

TBT (Total Blocking Time)

Value460 ms

61/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value4.4 s

83/100

10%

Network Requests Diagram

cstt.nl

432 ms

www.cstt.nl

438 ms

www.cstt.nl

460 ms

styles.css

88 ms

inc_main.js

180 ms

Our browser made a total of 22 requests to load all elements on the main page. We found that 91% of them (20 requests) were addressed to the original Cstt.nl, 9% (2 requests) were made to Ssl.google-analytics.com. The less responsive or slowest element that took the longest time to load (460 ms) belongs to the original domain Cstt.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 17.9 kB (14%)

Content Size

129.0 kB

After Optimization

111.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Cstt.nl main page is 129.0 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. Only 10% of websites need less resources to load. Images take 96.3 kB which makes up the majority of the site volume.

HTML Optimization

-67%

Potential reduce by 8.1 kB

  • Original 12.1 kB
  • After minification 11.9 kB
  • After compression 3.9 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 8.1 kB or 67% of the original size.

Image Optimization

-9%

Potential reduce by 8.5 kB

  • Original 96.3 kB
  • After minification 87.8 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. CSTT images are well optimized though.

JavaScript Optimization

-3%

Potential reduce by 607 B

  • Original 18.6 kB
  • After minification 18.6 kB
  • After compression 18.0 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.

CSS Optimization

-30%

Potential reduce by 611 B

  • Original 2.0 kB
  • After minification 2.0 kB
  • After compression 1.4 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. Cstt.nl needs all CSS files to be minified and compressed as it can save up to 611 B or 30% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

19

After Optimization

19

  • Images
  • JavaScript
  • CSS

The browser has sent 19 CSS, Javascripts, AJAX and image requests in order to completely render the main page of CSTT. According to our analytics all requests are already optimized.

Network Requests Diagram

cstt.nl

cstt.nl

432 ms

www.cstt.nl

www.cstt.nl

438 ms

www.cstt.nl

www.cstt.nl

460 ms

styles.css

styles.css

88 ms

inc_main.js

inc_main.js

180 ms

inc_check.js

inc_check.js

266 ms

ga.js

ga.js

47 ms

bg.png

bg.png

174 ms

search.png

search.png

128 ms

spacer.gif

spacer.gif

120 ms

beeldmerk.jpg

beeldmerk.jpg

158 ms

header-solar-engine.jpg

header-solar-engine.jpg

243 ms

bg_menu.jpg

bg_menu.jpg

172 ms

menulink.png

menulink.png

206 ms

li.jpg

li.jpg

255 ms

oranje.jpg

oranje.jpg

296 ms

lichtblauw.jpg

lichtblauw.jpg

318 ms

nlhomepage-block3.jpg

nlhomepage-block3.jpg

330 ms

lime.jpg

lime.jpg

333 ms

logo-buas-s.png

logo-buas-s.png

417 ms

celth-logo.png

celth-logo.png

364 ms

__utm.gif

__utm.gif

102 ms

Accessibility Review

cstt.nl accessibility score

56

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.

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

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

cstt.nl best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

SEO Factors

cstt.nl SEO score

64

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

robots.txt is not valid

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

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 Cstt.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 Cstt.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

cstt.nl

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