Tools & Wizards About Us
vindboek.nl screenshot

Report Summary

  • 83

    Performance

    Renders faster than
    87% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 68% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 94

    SEO

    Google-friendlier than
    90% of websites

vindboek.nl

Tadex

Page Load Speed

2.3 sec in total

First Response

296 ms

Resources Loaded

1.9 sec

Page Rendered

177 ms

vindboek.nl screenshot

About Website

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

Op VindBoek.nl vind u boeken met een ISBN (ISBN-10 of ISBN-13) uit Nederland en Belgie.

Visit vindboek.nl

Key Findings

We analyzed Vindboek.nl page load time and found that the first response time was 296 ms and then it took 2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

vindboek.nl performance score

83

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

54/100

10%

LCP (Largest Contentful Paint)

Value2.9 s

82/100

25%

SI (Speed Index)

Value3.5 s

88/100

10%

TBT (Total Blocking Time)

Value240 ms

85/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value4.6 s

81/100

10%

Network Requests Diagram

vindboek.nl

296 ms

www.vindboek.nl

392 ms

style.css

93 ms

plusone.js

74 ms

addthis_widget.js

32 ms

Our browser made a total of 70 requests to load all elements on the main page. We found that 67% of them (47 requests) were addressed to the original Vindboek.nl, 11% (8 requests) were made to Apis.google.com and 3% (2 requests) were made to S7.addthis.com. The less responsive or slowest element that took the longest time to load (755 ms) belongs to the original domain Vindboek.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 349.4 kB (39%)

Content Size

890.6 kB

After Optimization

541.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Vindboek.nl main page is 890.6 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. 50% of websites need less resources to load. Javascripts take 423.3 kB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 58.0 kB

  • Original 79.9 kB
  • After minification 74.8 kB
  • After compression 21.9 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 58.0 kB or 73% of the original size.

Image Optimization

-6%

Potential reduce by 22.3 kB

  • Original 377.8 kB
  • After minification 355.5 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. Vindboek images are well optimized though.

JavaScript Optimization

-62%

Potential reduce by 261.1 kB

  • Original 423.3 kB
  • After minification 423.3 kB
  • After compression 162.2 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 261.1 kB or 62% of the original size.

CSS Optimization

-85%

Potential reduce by 8.1 kB

  • Original 9.6 kB
  • After minification 7.0 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. Vindboek.nl needs all CSS files to be minified and compressed as it can save up to 8.1 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 12 (18%)

Requests Now

67

After Optimization

55

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 67 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vindboek. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

vindboek.nl

vindboek.nl

296 ms

www.vindboek.nl

www.vindboek.nl

392 ms

style.css

style.css

93 ms

plusone.js

plusone.js

74 ms

addthis_widget.js

addthis_widget.js

32 ms

swfobject.js

swfobject.js

25 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

191 ms

ga.js

ga.js

191 ms

all.js

all.js

190 ms

BOL468x60_nederlandseboeken.gif

BOL468x60_nederlandseboeken.gif

282 ms

impression

impression

277 ms

logo.jpg

logo.jpg

186 ms

9789402751161_VRK.jpg

9789402751161_VRK.jpg

203 ms

9789402751154_VRK.jpg

9789402751154_VRK.jpg

187 ms

9789044532661_VRK.jpg

9789044532661_VRK.jpg

201 ms

9789402751123_VRK.jpg

9789402751123_VRK.jpg

203 ms

9789402751185_VRK.jpg

9789402751185_VRK.jpg

207 ms

9789402751215_VRK.jpg

9789402751215_VRK.jpg

279 ms

9789045351858_VRK.jpg

9789045351858_VRK.jpg

279 ms

9789045320120_VRK.jpg

9789045320120_VRK.jpg

292 ms

9789045320038_VRK.jpg

9789045320038_VRK.jpg

291 ms

9789402751390_VRK.jpg

9789402751390_VRK.jpg

291 ms

9789402751376_VRK.jpg

9789402751376_VRK.jpg

298 ms

9789402751383_VRK.jpg

9789402751383_VRK.jpg

381 ms

9789463188449_VRK.jpg

9789463188449_VRK.jpg

382 ms

9789006622126_VRK.jpg

9789006622126_VRK.jpg

422 ms

9789043034906_VRK.jpg

9789043034906_VRK.jpg

423 ms

9789462982352_VRK.jpg

9789462982352_VRK.jpg

420 ms

9789048531615_VRK.jpg

9789048531615_VRK.jpg

424 ms

9789462982338_VRK.jpg

9789462982338_VRK.jpg

512 ms

9789045351841_VRK.jpg

9789045351841_VRK.jpg

510 ms

9789402751338_VRK.jpg

9789402751338_VRK.jpg

513 ms

9789082449181_VRK.jpg

9789082449181_VRK.jpg

575 ms

9789402147407_VRK.jpg

9789402147407_VRK.jpg

577 ms

9789402714104_VRK.jpg

9789402714104_VRK.jpg

577 ms

9789402147476_VRK.jpg

9789402147476_VRK.jpg

600 ms

9789045351919_VRK.jpg

9789045351919_VRK.jpg

601 ms

9789045351902_VRK.jpg

9789045351902_VRK.jpg

603 ms

9789045351889_VRK.jpg

9789045351889_VRK.jpg

665 ms

9789045351896_VRK.jpg

9789045351896_VRK.jpg

667 ms

9789045351872_VRK.jpg

9789045351872_VRK.jpg

665 ms

9789045351926_VRK.jpg

9789045351926_VRK.jpg

690 ms

9789045320380_VRK.jpg

9789045320380_VRK.jpg

692 ms

9789045320106_VRK.jpg

9789045320106_VRK.jpg

695 ms

9789044745580_VRK.jpg

9789044745580_VRK.jpg

754 ms

9789044745962_VRK.jpg

9789044745962_VRK.jpg

755 ms

9789025113360_VRK.jpg

9789025113360_VRK.jpg

751 ms

300lo.json

300lo.json

71 ms

cb=gapi.loaded_1

cb=gapi.loaded_1

62 ms

fastbutton

fastbutton

83 ms

__utm.gif

__utm.gif

22 ms

sh.8e5f85691f9aaa082472a194.html

sh.8e5f85691f9aaa082472a194.html

42 ms

126 ms

postmessageRelay

postmessageRelay

70 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

40 ms

cb=gapi.loaded_1

cb=gapi.loaded_1

40 ms

xd_arbiter.php

xd_arbiter.php

139 ms

xd_arbiter.php

xd_arbiter.php

264 ms

W5F8_SL0XFawnjxHGsZjJA.ttf

W5F8_SL0XFawnjxHGsZjJA.ttf

31 ms

3193398744-postmessagerelay.js

3193398744-postmessagerelay.js

34 ms

rpc:shindig_random.js

rpc:shindig_random.js

38 ms

9789065802972_VRK.jpg

9789065802972_VRK.jpg

601 ms

9781941447710.jpg

9781941447710.jpg

600 ms

9781311816443.jpg

9781311816443.jpg

591 ms

9781507134306.jpg

9781507134306.jpg

665 ms

9780987470010.jpg

9780987470010.jpg

661 ms

9781627320504.jpg

9781627320504.jpg

660 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

3 ms

9781910859452.jpg

9781910859452.jpg

597 ms

cadeaubon.jpg

cadeaubon.jpg

598 ms

Accessibility Review

vindboek.nl accessibility score

88

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

Buttons do not have an accessible name

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.

Best Practices

vindboek.nl best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

vindboek.nl SEO score

94

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

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 Vindboek.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 Vindboek.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

vindboek.nl

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