Tools & Wizards About Us
telefoonboek.nl screenshot

Report Summary

  • 51

    Performance

    Renders faster than
    70% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    57% of websites

  • 100

    SEO

    Google-friendlier than
    95% of websites

telefoonboek.nl

Telefoonboek - telefoongids in Nederland - Telefoonnummer

Page Load Speed

2.1 sec in total

First Response

161 ms

Resources Loaded

1.8 sec

Page Rendered

123 ms

telefoonboek.nl screenshot

About Website

Click here to check amazing Telefoonboek content for Netherlands. Otherwise, check out these important facts you probably never knew about telefoonboek.nl

Zoek telefoonnummers online in de officiële bedrijven- en personengids van Nederland.

Visit telefoonboek.nl

Key Findings

We analyzed Telefoonboek.nl page load time and found that the first response time was 161 ms and then it took 1.9 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.

Performance Metrics

telefoonboek.nl performance score

51

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

67/100

10%

LCP (Largest Contentful Paint)

Value4.3 s

42/100

25%

SI (Speed Index)

Value3.2 s

92/100

10%

TBT (Total Blocking Time)

Value1,220 ms

20/100

30%

CLS (Cumulative Layout Shift)

Value0.087

93/100

15%

TTI (Time to Interactive)

Value7.9 s

43/100

10%

Network Requests Diagram

telefoonboek.nl

161 ms

www.telefoonboek.nl

471 ms

main.css

282 ms

jquery.min.js

48 ms

jquery-ui.min.js

57 ms

Our browser made a total of 20 requests to load all elements on the main page. We found that 45% of them (9 requests) were addressed to the original Telefoonboek.nl, 10% (2 requests) were made to Cdnjs.cloudflare.com and 10% (2 requests) were made to Google.com. The less responsive or slowest element that took the longest time to load (764 ms) relates to the external source Cluster.ad-serverparc.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 351.9 kB (61%)

Content Size

576.9 kB

After Optimization

225.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Telefoonboek.nl main page is 576.9 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. Javascripts take 302.9 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 34.5 kB

  • Original 43.7 kB
  • After minification 36.9 kB
  • After compression 9.2 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. This page needs HTML code to be minified as it can gain 6.8 kB, which is 16% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 34.5 kB or 79% of the original size.

Image Optimization

-1%

Potential reduce by 1.3 kB

  • Original 84.6 kB
  • After minification 83.3 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. Telefoonboek images are well optimized though.

JavaScript Optimization

-65%

Potential reduce by 196.9 kB

  • Original 302.9 kB
  • After minification 302.9 kB
  • After compression 106.0 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 196.9 kB or 65% of the original size.

CSS Optimization

-82%

Potential reduce by 119.3 kB

  • Original 145.8 kB
  • After minification 145.7 kB
  • After compression 26.5 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. Telefoonboek.nl needs all CSS files to be minified and compressed as it can save up to 119.3 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 7 (41%)

Requests Now

17

After Optimization

10

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 17 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Telefoonboek. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

telefoonboek.nl

telefoonboek.nl

161 ms

www.telefoonboek.nl

www.telefoonboek.nl

471 ms

main.css

main.css

282 ms

jquery.min.js

jquery.min.js

48 ms

jquery-ui.min.js

jquery-ui.min.js

57 ms

telefoonboek.all.js

telefoonboek.all.js

368 ms

jsapi

jsapi

43 ms

conversion.js

conversion.js

36 ms

ga_debug.js

ga_debug.js

76 ms

95 ms

img-ico1.gif

img-ico1.gif

90 ms

trustpilot-5stars.png

trustpilot-5stars.png

90 ms

trustpilot-logo.png

trustpilot-logo.png

171 ms

fbevents.js

fbevents.js

296 ms

AdLanticHPTO.php

AdLanticHPTO.php

764 ms

telefoonboek-sprite.png

telefoonboek-sprite.png

309 ms

sprite1.png

sprite1.png

433 ms

__utm.gif

__utm.gif

29 ms

17 ms

27 ms

Accessibility Review

telefoonboek.nl accessibility score

100

Accessibility Issues

Best Practices

telefoonboek.nl best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

telefoonboek.nl SEO score

100

Search Engine Optimization Advices

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 Telefoonboek.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 Telefoonboek.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

telefoonboek.nl

Open Graph data is detected on the main page of Telefoonboek. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: