Tools & Wizards About Us
biografieboeken.nl screenshot

Report Summary

  • 48

    Performance

    Renders faster than
    67% of other websites

  • 92

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 98

    SEO

    Google-friendlier than
    92% of websites

biografieboeken.nl

Biografieboeken.nl • Dé webshop in biografie boeken en romans

Page Load Speed

4.2 sec in total

First Response

609 ms

Resources Loaded

3.1 sec

Page Rendered

437 ms

biografieboeken.nl screenshot

About Website

Click here to check amazing Biografieboeken content. Otherwise, check out these important facts you probably never knew about biografieboeken.nl

Het complete aanbod biografieën van bekende acteurs, politici, sporters en nog veel meer. ✓ Gratis verzending v.a. €20 ✓ Vandaag besteld, morgen in huis!

Visit biografieboeken.nl

Key Findings

We analyzed Biografieboeken.nl page load time and found that the first response time was 609 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

biografieboeken.nl performance score

48

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.9 s

26/100

10%

LCP (Largest Contentful Paint)

Value4.2 s

45/100

25%

SI (Speed Index)

Value6.8 s

35/100

10%

TBT (Total Blocking Time)

Value670 ms

44/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value11.0 s

21/100

10%

Network Requests Diagram

biografieboeken.nl

609 ms

style.css

86 ms

css

23 ms

styles.css

173 ms

jquery.js

264 ms

Our browser made a total of 98 requests to load all elements on the main page. We found that 30% of them (29 requests) were addressed to the original Biografieboeken.nl, 10% (10 requests) were made to Static.xx.fbcdn.net and 8% (8 requests) were made to Scontent.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (860 ms) relates to the external source Scontent.xx.fbcdn.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 216.4 kB (33%)

Content Size

646.7 kB

After Optimization

430.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Biografieboeken.nl main page is 646.7 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. 70% of websites need less resources to load. Images take 329.9 kB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 57.0 kB

  • Original 68.5 kB
  • After minification 52.7 kB
  • After compression 11.5 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 15.8 kB, which is 23% 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 57.0 kB or 83% of the original size.

Image Optimization

-6%

Potential reduce by 20.6 kB

  • Original 329.9 kB
  • After minification 309.2 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. Biografieboeken images are well optimized though.

JavaScript Optimization

-48%

Potential reduce by 94.3 kB

  • Original 197.0 kB
  • After minification 195.6 kB
  • After compression 102.7 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 94.3 kB or 48% of the original size.

CSS Optimization

-87%

Potential reduce by 44.4 kB

  • Original 51.3 kB
  • After minification 36.6 kB
  • After compression 6.9 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. Biografieboeken.nl needs all CSS files to be minified and compressed as it can save up to 44.4 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 52 (57%)

Requests Now

92

After Optimization

40

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 92 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Biografieboeken. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 33 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

biografieboeken.nl

biografieboeken.nl

609 ms

style.css

style.css

86 ms

css

css

23 ms

styles.css

styles.css

173 ms

jquery.js

jquery.js

264 ms

jquery-migrate.min.js

jquery-migrate.min.js

183 ms

show_ads.js

show_ads.js

8 ms

all.js

all.js

308 ms

standout-css3-buttons.css

standout-css3-buttons.css

188 ms

jquery.form.min.js

jquery.form.min.js

188 ms

scripts.js

scripts.js

185 ms

dc.js

dc.js

68 ms

__utm.gif

__utm.gif

21 ms

ti.js

ti.js

26 ms

bg_stripes.png

bg_stripes.png

92 ms

bg_noise.png

bg_noise.png

367 ms

logo-biografieboeken1.png

logo-biografieboeken1.png

243 ms

Biografie-Sven-Kramer-Sven-258x407.jpg

Biografie-Sven-Kramer-Sven-258x407.jpg

242 ms

Biografie-Nelson-Mandela-De-lange-weg-naar-de-vrijheid-258x405.jpg

Biografie-Nelson-Mandela-De-lange-weg-naar-de-vrijheid-258x405.jpg

269 ms

Biografie-Steve-jobs-de-biografie-258x405.jpg

Biografie-Steve-jobs-de-biografie-258x405.jpg

90 ms

Gerard-Heineken-De-man-de-stad-en-het-bier-140x221.jpg

Gerard-Heineken-De-man-de-stad-en-het-bier-140x221.jpg

239 ms

Neymar-de-atleet-de-superster-en-de-mythe-140x224.jpg

Neymar-de-atleet-de-superster-en-de-mythe-140x224.jpg

239 ms

Biografie-Michael-Schumacher-De-Biografie-140x212.jpg

Biografie-Michael-Schumacher-De-Biografie-140x212.jpg

307 ms

Biografie-Sven-Kramer-Sven-140x221.jpg

Biografie-Sven-Kramer-Sven-140x221.jpg

306 ms

9789021556598-140x217.jpg

9789021556598-140x217.jpg

332 ms

Autobiografie-Niels-Roelen-Soldaat-in-Uruzgan-140x224.jpg

Autobiografie-Niels-Roelen-Soldaat-in-Uruzgan-140x224.jpg

332 ms

Biografie-boek-Ronald-Koeman-Biografie-140x199.jpg

Biografie-boek-Ronald-Koeman-Biografie-140x199.jpg

387 ms

Biografie-Jacqueline-Kennedy-Mijn-Leven-met-John-F-Kennedy-140x197.jpg

Biografie-Jacqueline-Kennedy-Mijn-Leven-met-John-F-Kennedy-140x197.jpg

412 ms

Biografie-Lionel-Messi-Biografie-140x221.jpg

Biografie-Lionel-Messi-Biografie-140x221.jpg

412 ms

Autobiografie-Hillary-Clinton-Mijn-verhaal-140x214.jpg

Autobiografie-Hillary-Clinton-Mijn-verhaal-140x214.jpg

411 ms

Biografie-Amy-Winehouse-De-Biografie-140x222.gif

Biografie-Amy-Winehouse-De-Biografie-140x222.gif

411 ms

Biografie-Jan-Boskamp-Geen-Gezeik-140x200.jpg

Biografie-Jan-Boskamp-Geen-Gezeik-140x200.jpg

548 ms

ca-pub-4186973167943383.js

ca-pub-4186973167943383.js

196 ms

zrt_lookup.html

zrt_lookup.html

222 ms

show_ads_impl.js

show_ads_impl.js

74 ms

stars_orange.png

stars_orange.png

532 ms

main_content.png

main_content.png

732 ms

p

p

205 ms

bBfSFEmm0r44Htacwqm_6r.js

bBfSFEmm0r44Htacwqm_6r.js

171 ms

bg_stripes_dark.png

bg_stripes_dark.png

542 ms

YDAoLskQQ5MOAgvHUQCcLbvy90DtE_Pg_qiF9bHvTzw.ttf

YDAoLskQQ5MOAgvHUQCcLbvy90DtE_Pg_qiF9bHvTzw.ttf

171 ms

251 ms

widgets.js

widgets.js

184 ms

ads

ads

256 ms

xd_arbiter.php

xd_arbiter.php

271 ms

xd_arbiter.php

xd_arbiter.php

567 ms

plusone.js

plusone.js

161 ms

osd.js

osd.js

93 ms

ads

ads

158 ms

ads

ads

265 ms

button.0308b81ff1714e446f674b5b9793f2cd.js

button.0308b81ff1714e446f674b5b9793f2cd.js

276 ms

v2

v2

58 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

14 ms

cb=gapi.loaded_1

cb=gapi.loaded_1

38 ms

fastbutton

fastbutton

134 ms

like_box.php

like_box.php

245 ms

abg.js

abg.js

131 ms

postmessageRelay

postmessageRelay

210 ms

dpx

dpx

111 ms

m_js_controller.js

m_js_controller.js

106 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

109 ms

cb=gapi.loaded_1

cb=gapi.loaded_1

112 ms

s

s

85 ms

googlelogo_color_112x36dp.png

googlelogo_color_112x36dp.png

107 ms

14405580235202140753

14405580235202140753

93 ms

x_button_blue2.png

x_button_blue2.png

83 ms

favicon

favicon

99 ms

nessie_icon_tiamat_white.png

nessie_icon_tiamat_white.png

43 ms

W5F8_SL0XFawnjxHGsZjJA.ttf

W5F8_SL0XFawnjxHGsZjJA.ttf

57 ms

410ucuAGgaJ.css

410ucuAGgaJ.css

290 ms

tSbl8xBI27R.css

tSbl8xBI27R.css

360 ms

q68gy-v_YMF.js

q68gy-v_YMF.js

497 ms

FJmpeSpHpjS.js

FJmpeSpHpjS.js

634 ms

0wM5s1Khldu.js

0wM5s1Khldu.js

538 ms

1bNoFZUdlYZ.js

1bNoFZUdlYZ.js

539 ms

3193398744-postmessagerelay.js

3193398744-postmessagerelay.js

31 ms

rpc:shindig_random.js

rpc:shindig_random.js

98 ms

follow_button.b9740740e0bcf9b0657c5b11bd4388da.nl.html

follow_button.b9740740e0bcf9b0657c5b11bd4388da.nl.html

114 ms

ca.png

ca.png

163 ms

fBnyGA8Aionz5086-mElmoOSPUuyQ1M9Un647_EjucU.js

fBnyGA8Aionz5086-mElmoOSPUuyQ1M9Un647_EjucU.js

13 ms

xrefid.xgi

xrefid.xgi

69 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

24 ms

info.json

info.json

94 ms

jot

jot

86 ms

1044278_173437319497794_1648625258_n.png

1044278_173437319497794_1648625258_n.png

474 ms

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613 ms

1468771_10151788267671398_1455986545_n.jpg

1468771_10151788267671398_1455986545_n.jpg

699 ms

11011940_10153399068984549_1363329491561431358_n.jpg

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677 ms

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701 ms

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748 ms

12688162_1051779564878206_4104385234579817234_n.jpg

12688162_1051779564878206_4104385234579817234_n.jpg

860 ms

10245562_704453836358506_9063681188219524445_n.jpg

10245562_704453836358506_9063681188219524445_n.jpg

751 ms

wL6VQj7Ab77.png

wL6VQj7Ab77.png

69 ms

s7jcwEQH7Sx.png

s7jcwEQH7Sx.png

70 ms

activeview

activeview

14 ms

I6-MnjEovm5.js

I6-MnjEovm5.js

72 ms

pQrUxxo5oQp.js

pQrUxxo5oQp.js

139 ms

ui

ui

30 ms

Accessibility Review

biografieboeken.nl accessibility score

92

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.

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

High

Links do not have a discernible name

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

biografieboeken.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

SEO Factors

biografieboeken.nl SEO score

98

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 Biografieboeken.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 Biografieboeken.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

biografieboeken.nl

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