Tools & Wizards About Us
zweefvliegenonline.nl screenshot

Report Summary

  • 83

    Performance

    Renders faster than
    87% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 66% of websites

  • 50

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

zweefvliegenonline.nl

Zweefvliegen met zweefvliegenonline, glidertracking, startpagina en discussieforum

Page Load Speed

3.9 sec in total

First Response

310 ms

Resources Loaded

3.3 sec

Page Rendered

300 ms

zweefvliegenonline.nl screenshot

About Website

Click here to check amazing Zweefvliegen Online content. Otherwise, check out these important facts you probably never knew about zweefvliegenonline.nl

DE website voor ONAFHANKELIJK zweefvliegend nederland. Wat is zweefvliegen? Hier vindt U alles over zweefvliegen : Nieuws Zweefvliegclubs,Zweefvliegersforum, Fotowedstrijd, Startpagina met weblinks en...

Visit zweefvliegenonline.nl

Key Findings

We analyzed Zweefvliegenonline.nl page load time and found that the first response time was 310 ms and then it took 3.6 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

zweefvliegenonline.nl performance score

83

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.7 s

58/100

10%

LCP (Largest Contentful Paint)

Value3.6 s

62/100

25%

SI (Speed Index)

Value4.0 s

81/100

10%

TBT (Total Blocking Time)

Value80 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0.058

98/100

15%

TTI (Time to Interactive)

Value3.7 s

90/100

10%

Network Requests Diagram

zweefvliegenonline.nl

310 ms

www.zweefvliegenonline.nl

624 ms

jquery-1.4.2.min.js

296 ms

counter.php

137 ms

img0002_over.gif

112 ms

Our browser made a total of 43 requests to load all elements on the main page. We found that 81% of them (35 requests) were addressed to the original Zweefvliegenonline.nl, 7% (3 requests) were made to Gadgets.buienradar.nl and 5% (2 requests) were made to Cdn.knmi.nl. The less responsive or slowest element that took the longest time to load (668 ms) relates to the external source Image-cdn.buienradar.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 65.9 kB (28%)

Content Size

233.1 kB

After Optimization

167.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zweefvliegenonline.nl main page is 233.1 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. 20% of websites need less resources to load. Images take 131.3 kB which makes up the majority of the site volume.

HTML Optimization

-71%

Potential reduce by 8.8 kB

  • Original 12.4 kB
  • After minification 11.9 kB
  • After compression 3.6 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 8.8 kB or 71% of the original size.

Image Optimization

-9%

Potential reduce by 11.7 kB

  • Original 131.3 kB
  • After minification 119.5 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. Zweefvliegen Online images are well optimized though.

JavaScript Optimization

-51%

Potential reduce by 44.1 kB

  • Original 86.3 kB
  • After minification 86.3 kB
  • After compression 42.3 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 44.1 kB or 51% of the original size.

CSS Optimization

-44%

Potential reduce by 1.3 kB

  • Original 3.0 kB
  • After minification 2.6 kB
  • After compression 1.7 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. Zweefvliegenonline.nl needs all CSS files to be minified and compressed as it can save up to 1.3 kB or 44% of the original size.

Requests Breakdown

Number of requests can be reduced by 3 (8%)

Requests Now

39

After Optimization

36

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 39 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zweefvliegen Online. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

zweefvliegenonline.nl

zweefvliegenonline.nl

310 ms

www.zweefvliegenonline.nl

www.zweefvliegenonline.nl

624 ms

jquery-1.4.2.min.js

jquery-1.4.2.min.js

296 ms

counter.php

counter.php

137 ms

img0002_over.gif

img0002_over.gif

112 ms

img0002.gif

img0002.gif

224 ms

img0003_over.gif

img0003_over.gif

300 ms

img0003.gif

img0003.gif

300 ms

img0046_over.gif

img0046_over.gif

298 ms

img0046.gif

img0046.gif

304 ms

img0047_over.gif

img0047_over.gif

301 ms

img0047.gif

img0047.gif

329 ms

img0004_over.gif

img0004_over.gif

437 ms

img0004.gif

img0004.gif

449 ms

img0005_over.gif

img0005_over.gif

426 ms

img0005.gif

img0005.gif

421 ms

img0001.jpg

img0001.jpg

529 ms

rss16.gif

rss16.gif

457 ms

weerradar.html

weerradar.html

530 ms

hoofdpagina.php

hoofdpagina.php

564 ms

Foto.html

Foto.html

545 ms

weersvoorspelling.html

weersvoorspelling.html

557 ms

radarfivedays

radarfivedays

385 ms

button.jpg

button.jpg

109 ms

img0009.png

img0009.png

110 ms

kaart_verwachtingen_Vandaag_dag.gif

kaart_verwachtingen_Vandaag_dag.gif

48 ms

hoofdpagina.css

hoofdpagina.css

121 ms

footer_hoofdpagina.css

footer_hoofdpagina.css

116 ms

forum_postings.css

forum_postings.css

120 ms

kaart_verwachtingen_Vandaag_dag.gif

kaart_verwachtingen_Vandaag_dag.gif

376 ms

news.gif

news.gif

133 ms

sijmendevries.png

sijmendevries.png

224 ms

zcameland.jpg

zcameland.jpg

122 ms

info.gif

info.gif

126 ms

starttijden.jpg

starttijden.jpg

213 ms

wedstrt.gif

wedstrt.gif

133 ms

omk_2019.jpg

omk_2019.jpg

258 ms

nk2019.jpg

nk2019.jpg

244 ms

steven.jpg

steven.jpg

242 ms

styles.css

styles.css

264 ms

P.png

P.png

94 ms

202405111540__256x256_True_False_True_3_3_1_0_run202405111540.gif

202405111540__256x256_True_False_True_3_3_1_0_run202405111540.gif

668 ms

202405111540__256x256_True_True_True_3_3_1_0_run202405111540.gif

202405111540__256x256_True_True_True_3_3_1_0_run202405111540.gif

613 ms

Accessibility Review

zweefvliegenonline.nl accessibility score

87

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

<frame> or <iframe> elements do not have a title

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

zweefvliegenonline.nl best practices score

50

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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

zweefvliegenonline.nl SEO score

69

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

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 Zweefvliegenonline.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 Zweefvliegenonline.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

zweefvliegenonline.nl

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