Tools & Wizards About Us
vwkweb.nl screenshot

Report Summary

  • 77

    Performance

    Renders faster than
    85% of other websites

  • 46

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 62

    SEO

    Google-friendlier than
    22% of websites

vwkweb.nl

Vereniging voor Weerkunde en Klimatologie

Page Load Speed

6.9 sec in total

First Response

1.3 sec

Resources Loaded

5.4 sec

Page Rendered

175 ms

vwkweb.nl screenshot

About Website

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

Website van de vereniging voor Weerkunde en Klimatologie. Website over weer en klimaat in de hele wereld.

Visit vwkweb.nl

Key Findings

We analyzed Vwkweb.nl page load time and found that the first response time was 1.3 sec and then it took 5.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

vwkweb.nl performance score

77

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.4 s

36/100

10%

LCP (Largest Contentful Paint)

Value3.5 s

63/100

25%

SI (Speed Index)

Value6.0 s

47/100

10%

TBT (Total Blocking Time)

Value70 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0.003

100/100

15%

TTI (Time to Interactive)

Value4.1 s

87/100

10%

Network Requests Diagram

www.vwkweb.nl

1324 ms

stylesheet.css

208 ms

jquery-1.4.2.min.js

785 ms

jquery.marquee.js

680 ms

headerBackground.jpg

96 ms

Our browser made a total of 128 requests to load all elements on the main page. We found that 88% of them (112 requests) were addressed to the original Vwkweb.nl, 10% (13 requests) were made to Sylphide.vwkweb.nl and 2% (2 requests) were made to Pr01.is4c.com. The less responsive or slowest element that took the longest time to load (1.7 sec) belongs to the original domain Vwkweb.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 2.4 MB (6%)

Content Size

38.7 MB

After Optimization

36.3 MB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Vwkweb.nl main page is 38.7 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 38.6 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 64.5 kB

  • Original 78.7 kB
  • After minification 75.9 kB
  • After compression 14.2 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 64.5 kB or 82% of the original size.

Image Optimization

-6%

Potential reduce by 2.4 MB

  • Original 38.6 MB
  • After minification 36.3 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. Vwkweb images are well optimized though.

JavaScript Optimization

-3%

Potential reduce by 735 B

  • Original 26.4 kB
  • After minification 26.4 kB
  • After compression 25.6 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.

Requests Breakdown

We found no issues to fix!

Requests Now

127

After Optimization

127

  • Images
  • JavaScript
  • CSS

The browser has sent 127 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vwkweb. According to our analytics all requests are already optimized.

Network Requests Diagram

www.vwkweb.nl

www.vwkweb.nl

1324 ms

stylesheet.css

stylesheet.css

208 ms

jquery-1.4.2.min.js

jquery-1.4.2.min.js

785 ms

jquery.marquee.js

jquery.marquee.js

680 ms

headerBackground.jpg

headerBackground.jpg

96 ms

TEMPC_latest_small.png

TEMPC_latest_small.png

743 ms

WWWRADARLGT_loop.gif

WWWRADARLGT_loop.gif

494 ms

lightning.png

lightning.png

282 ms

logo.png

logo.png

174 ms

flitsenBackground.png

flitsenBackground.png

269 ms

searchBackground.jpg

searchBackground.jpg

282 ms

searchButton.png

searchButton.png

283 ms

twitter.png

twitter.png

284 ms

youtube.png

youtube.png

289 ms

facebook.png

facebook.png

361 ms

bestel_wolkenposter.jpg

bestel_wolkenposter.jpg

377 ms

bestel_wolkenboek.jpg

bestel_wolkenboek.jpg

561 ms

titleBackground.jpg

titleBackground.jpg

375 ms

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376 ms

6_weer_1.jpg

6_weer_1.jpg

384 ms

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6_weerhuisje_banner.gif

734 ms

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470 ms

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3388_optische_verschijnselen_in_nederland_isbn9789464710922.jpg

561 ms

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469 ms

909_email.jpg

909_email.jpg

480 ms

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842 ms

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1102 ms

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939 ms

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917 ms

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917 ms

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1133 ms

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920 ms

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1015 ms

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1105 ms

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1016 ms

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1513 ms

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1_15april_19.20uur_bui_met_onweer_pial_denhoorn_2.jpg

1113 ms

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1113 ms

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1660 ms

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1201 ms

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1212 ms

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1214 ms

GRASSTEMPCMIN_latest_small.png

GRASSTEMPCMIN_latest_small.png

713 ms

WINDCHILL_latest_small.png

WINDCHILL_latest_small.png

714 ms

WINDSPEEDMS_latest_small.png

WINDSPEEDMS_latest_small.png

818 ms

WINDDEGREES_latest_small.png

WINDDEGREES_latest_small.png

821 ms

WINDGUSTMS_latest_small.png

WINDGUSTMS_latest_small.png

824 ms

SOLRADWM_latest_small.png

SOLRADWM_latest_small.png

921 ms

SOLHOURSSUM_latest_small.png

SOLHOURSSUM_latest_small.png

922 ms

SOLENERGYSUM_latest_small.png

SOLENERGYSUM_latest_small.png

924 ms

DAILYRAINMM_latest_small.png

DAILYRAINMM_latest_small.png

1027 ms

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HOURRAINMM_latest_small.png

1029 ms

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1033 ms

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1130 ms

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1174 ms

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1241 ms

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1068 ms

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1056 ms

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1069 ms

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1149 ms

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1150 ms

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1157 ms

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1149 ms

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1_optische_verschijnselen_gouda_zondag_14_april_2024_18.21.20_uur_j.w._de_wit_2.jpg

1152 ms

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1153 ms

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1167 ms

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1221 ms

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1152 ms

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1154 ms

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1633 ms

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1081 ms

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1141 ms

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985 ms

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879 ms

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799 ms

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1212 ms

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859 ms

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854 ms

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1061 ms

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1088 ms

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964 ms

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790 ms

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884 ms

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993 ms

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1031 ms

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968 ms

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1261 ms

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986 ms

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973 ms

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1566 ms

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947 ms

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942 ms

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909 ms

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895 ms

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949 ms

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942 ms

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913 ms

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898 ms

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1_14_maart_limburg_brunsummerheide_pialegerstee_2.jpg

951 ms

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1_wsp.03.24_bert_van_dijk_20240215_rechterbijzon_1353uurgouda_bertvandijk_2.jpg

949 ms

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976 ms

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1_wsp.03.24_bert_van_dijk_20240215_rechterbijzon_1351uurgouda_bertvandijk_2.jpg

916 ms

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955 ms

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955 ms

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1_6maart_18.40uur_pial_t_woudt_zh_2.jpg

1050 ms

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1_irisatie_gouda_zondag_25_februari_2024_11.48.41_uur_j.w._de_wit_2.jpg

931 ms

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1_wsp.03.24_bert_van_dijk_20240215_rechterbijzon_1348uurgouda_bertvandijk_2.jpg

913 ms

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1_irisatie_gouda_zondag_25_februari_2024_11.48.31_uur_j.w._de_wit_2.jpg

957 ms

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1_6maart_10.10uur_khwolken_pial_den_hoorn_2.jpg

955 ms

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1_wsp.03.24_bert_van_dijk_20240215_czb_1430uurgouda_bertvandijk_2.jpg

973 ms

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1_6maart_9.35uur_pial_ter_heijde_zh_2.jpg

912 ms

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1_6maart_7.45uur_ijs_op_het_dak_pial_den_hoorn_2.jpg

960 ms

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1_bijzonnen_en_bovenraakboog_gouda_zondag_28_januari_2024_15.06.23_uur_j.w._de_wit_2.jpg

858 ms

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1_wsp.02.24_bert_van_dijk_20240207_achterkantkoufront_cirrus_1111uurgouda_bertvandijk_2.jpg

768 ms

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1_wsp.02.24_bert_van_dijk_20240207_achterkantkoufront_cirrus_1113uurgouda_bertvandijk_2.jpg

717 ms

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1_2maart_9.55uur_pial_denhoorn_2.jpg

713 ms

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1_circumzenitale_boog_gouda_zondag_28_januari_2024_16.03.39_uur_j.w._de_wit_2.jpg

759 ms

1_wsp.04.24_bert_van_dijk_20240407_mammatuscirrus_1943uurreeuwijk_bertvandijk_2.jpg

1_wsp.04.24_bert_van_dijk_20240407_mammatuscirrus_1943uurreeuwijk_bertvandijk_2.jpg

746 ms

apply-button.png

apply-button.png

757 ms

contact-button.png

contact-button.png

750 ms

archiveButton.png

archiveButton.png

722 ms

topmenuLeftActive.png

topmenuLeftActive.png

775 ms

topmenuActive.png

topmenuActive.png

746 ms

topmenuRightActive.png

topmenuRightActive.png

759 ms

topmenuLeft.png

topmenuLeft.png

712 ms

topmenu.png

topmenu.png

706 ms

topmenuRight.png

topmenuRight.png

678 ms

loginButton.png

loginButton.png

738 ms

Accessibility Review

vwkweb.nl accessibility score

46

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

Form elements do not have associated labels

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Some elements have a [tabindex] value greater than 0

Best Practices

vwkweb.nl best practices score

67

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

SEO Factors

vwkweb.nl SEO score

62

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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

    NL

  • Language Claimed

    NL

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Vwkweb.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 Vwkweb.nl main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

vwkweb.nl

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