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stek.nl screenshot

Report Summary

  • 25

    Performance

    Renders faster than
    44% of other websites

  • 83

    Accessibility

    Visual factors better than
    that of 55% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

stek.nl

Home | STEK

Page Load Speed

4.9 sec in total

First Response

268 ms

Resources Loaded

4.5 sec

Page Rendered

184 ms

stek.nl screenshot

About Website

Welcome to stek.nl homepage info - get ready to check STEK best content right away, or after learning these important things about stek.nl

STEK bedrijfscertificering voor installatiebedrijven die werken in de koude-, klimaat- en warmtepompsector. STEK exameninstelling voor persoonscertificering voor monteurs die werken met F-gassen, warm...

Visit stek.nl

Key Findings

We analyzed Stek.nl page load time and found that the first response time was 268 ms and then it took 4.7 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

stek.nl performance score

25

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.3 s

41/100

10%

LCP (Largest Contentful Paint)

Value12.2 s

0/100

25%

SI (Speed Index)

Value7.4 s

27/100

10%

TBT (Total Blocking Time)

Value740 ms

40/100

30%

CLS (Cumulative Layout Shift)

Value0.524

15/100

15%

TTI (Time to Interactive)

Value8.8 s

35/100

10%

Network Requests Diagram

stek.nl

268 ms

www.stek.nl

870 ms

wp-emoji-release.min.js

92 ms

style.css

271 ms

front.css

260 ms

Our browser made a total of 50 requests to load all elements on the main page. We found that 74% of them (37 requests) were addressed to the original Stek.nl, 8% (4 requests) were made to Fonts.gstatic.com and 4% (2 requests) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (870 ms) belongs to the original domain Stek.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 398.7 kB (52%)

Content Size

766.4 kB

After Optimization

367.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Stek.nl main page is 766.4 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. 45% of websites need less resources to load. Images take 245.7 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 46.7 kB

  • Original 57.4 kB
  • After minification 53.2 kB
  • After compression 10.8 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 46.7 kB or 81% of the original size.

Image Optimization

-6%

Potential reduce by 14.5 kB

  • Original 245.7 kB
  • After minification 231.2 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. STEK images are well optimized though.

JavaScript Optimization

-61%

Potential reduce by 133.8 kB

  • Original 218.6 kB
  • After minification 212.1 kB
  • After compression 84.8 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 133.8 kB or 61% of the original size.

CSS Optimization

-83%

Potential reduce by 203.7 kB

  • Original 244.7 kB
  • After minification 216.5 kB
  • After compression 41.0 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. Stek.nl needs all CSS files to be minified and compressed as it can save up to 203.7 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 29 (67%)

Requests Now

43

After Optimization

14

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 43 CSS, Javascripts, AJAX and image requests in order to completely render the main page of STEK. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 to 1 for JavaScripts and from 12 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

stek.nl

stek.nl

268 ms

www.stek.nl

www.stek.nl

870 ms

wp-emoji-release.min.js

wp-emoji-release.min.js

92 ms

style.css

style.css

271 ms

front.css

front.css

260 ms

taptap.css

taptap.css

301 ms

css

css

94 ms

font-awesome.min.css

font-awesome.min.css

399 ms

addtoany.min.css

addtoany.min.css

322 ms

jquery.js

jquery.js

615 ms

jquery-migrate.min.js

jquery-migrate.min.js

352 ms

front.js

front.js

419 ms

taptap-accordion.js

taptap-accordion.js

385 ms

jquery.magnific-popup.min.js

jquery.magnific-popup.min.js

500 ms

jquery-scrolltofixed-min.js

jquery-scrolltofixed-min.js

454 ms

custom.js

custom.js

476 ms

jquery.easing.min.js

jquery.easing.min.js

35 ms

formreset.min.css

formreset.min.css

488 ms

formsmain.min.css

formsmain.min.css

507 ms

readyclass.min.css

readyclass.min.css

523 ms

browsers.min.css

browsers.min.css

560 ms

taptap.js

taptap.js

576 ms

comment-reply.min.js

comment-reply.min.js

585 ms

hoverIntent.min.js

hoverIntent.min.js

595 ms

superfish.min.js

superfish.min.js

608 ms

superfish.args.min.js

superfish.args.min.js

679 ms

superfish.compat.min.js

superfish.compat.min.js

679 ms

wp-embed.min.js

wp-embed.min.js

679 ms

placeholders.jquery.min.js

placeholders.jquery.min.js

720 ms

css

css

15 ms

font-awesome.min.css

font-awesome.min.css

22 ms

analytics.js

analytics.js

30 ms

collect

collect

4 ms

collect

collect

58 ms

koeltechniek-home2.jpg

koeltechniek-home2.jpg

593 ms

background-vind-installatiebedrijf.png

background-vind-installatiebedrijf.png

272 ms

whitepaper.png

whitepaper.png

220 ms

Manometer-300x200.jpg

Manometer-300x200.jpg

285 ms

iStock_000005629500_Large-200x300.jpg

iStock_000005629500_Large-200x300.jpg

288 ms

KoperLassen-300x182.jpg

KoperLassen-300x182.jpg

245 ms

stek-main-logo.png

stek-main-logo.png

244 ms

magnifier.png

magnifier.png

304 ms

icon_folder.png

icon_folder.png

304 ms

v0SdcGFAl2aezM9Vq_aFTQ.ttf

v0SdcGFAl2aezM9Vq_aFTQ.ttf

187 ms

nj47mAZe0mYUIySgfn0wpQ.ttf

nj47mAZe0mYUIySgfn0wpQ.ttf

213 ms

DvlFBScY1r-FMtZSYIYoYw.ttf

DvlFBScY1r-FMtZSYIYoYw.ttf

224 ms

page.js

page.js

227 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

522 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

177 ms

Hgo13k-tfSpn0qi1SFdUfaCWcynf_cDxXwCLxiixG1c.ttf

Hgo13k-tfSpn0qi1SFdUfaCWcynf_cDxXwCLxiixG1c.ttf

179 ms

Accessibility Review

stek.nl accessibility score

83

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

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

stek.nl best practices score

92

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

SEO Factors

stek.nl SEO score

92

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

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

High

Tap targets are not sized appropriately

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 Stek.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 Stek.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

stek.nl

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