Report Summary

  • 22

    Performance

    Renders faster than
    41% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 73% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    57% of websites

  • 90

    SEO

    Google-friendlier than
    69% of websites

Page Load Speed

6.8 sec in total

First Response

348 ms

Resources Loaded

6 sec

Page Rendered

419 ms

bibliotheekkennemerwaard.nl screenshot

About Website

Welcome to bibliotheekkennemerwaard.nl homepage info - get ready to check Bibliotheekkennemerwaard best content for Netherlands right away, or after learning these important things about bibliotheekkennemerwaard.nl

Bibliotheek Kennemerwaard, de samenwerkende bibliotheken van Alkmaar, Bergen, Castricum en Heerhugowaard.

Visit bibliotheekkennemerwaard.nl

Key Findings

We analyzed Bibliotheekkennemerwaard.nl page load time and found that the first response time was 348 ms and then it took 6.4 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

bibliotheekkennemerwaard.nl performance score

22

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.3 s

18/100

10%

LCP (Largest Contentful Paint)

Value14.1 s

0/100

25%

SI (Speed Index)

Value9.5 s

11/100

10%

TBT (Total Blocking Time)

Value1,620 ms

12/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value15.2 s

7/100

10%

Network Requests Diagram

bibliotheekkennemerwaard.nl

348 ms

www.bibliotheekkennemerwaard.nl

1843 ms

rbg-widgets.css

182 ms

bnl-header.css

298 ms

bnl-aggregated.css

317 ms

Our browser made a total of 103 requests to load all elements on the main page. We found that 88% of them (91 requests) were addressed to the original Bibliotheekkennemerwaard.nl, 5% (5 requests) were made to Cwise.probiblio.nl and 2% (2 requests) were made to Ssl.google-analytics.com. The less responsive or slowest element that took the longest time to load (2.7 sec) belongs to the original domain Bibliotheekkennemerwaard.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 594.9 kB (40%)

Content Size

1.5 MB

After Optimization

884.1 kB

In fact, the total size of Bibliotheekkennemerwaard.nl main page is 1.5 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. 45% of websites need less resources to load. Images take 756.5 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 54.0 kB

  • Original 69.5 kB
  • After minification 64.2 kB
  • After compression 15.5 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. 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 54.0 kB or 78% of the original size.

Image Optimization

-7%

Potential reduce by 55.4 kB

  • Original 756.5 kB
  • After minification 701.1 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. Bibliotheekkennemerwaard images are well optimized though.

JavaScript Optimization

-63%

Potential reduce by 196.8 kB

  • Original 314.7 kB
  • After minification 288.9 kB
  • After compression 117.9 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 196.8 kB or 63% of the original size.

CSS Optimization

-85%

Potential reduce by 288.7 kB

  • Original 338.4 kB
  • After minification 290.3 kB
  • After compression 49.6 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. Bibliotheekkennemerwaard.nl needs all CSS files to be minified and compressed as it can save up to 288.7 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 48 (50%)

Requests Now

96

After Optimization

48

The browser has sent 96 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Bibliotheekkennemerwaard. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 16 to 1 for JavaScripts and from 18 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

bibliotheekkennemerwaard.nl accessibility score

89

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

bibliotheekkennemerwaard.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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

bibliotheekkennemerwaard.nl SEO score

90

Search Engine Optimization Advices

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

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 Bibliotheekkennemerwaard.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 Bibliotheekkennemerwaard.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

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