Report Summary

  • 95

    Performance

    Renders faster than
    93% of other websites

  • 66

    Accessibility

    Visual factors better than
    that of 31% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 67

    SEO

    Google-friendlier than
    25% of websites

normenboek.nl

Normenboek - Natuur, Bos en Landschap en - Gemeentelijk Groen

Page Load Speed

1.7 sec in total

First Response

468 ms

Resources Loaded

1 sec

Page Rendered

204 ms

normenboek.nl screenshot

About Website

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

Op de website Normenboek.nl vindt u informatie over het Normenboek Natuur, Bos en Landschap en het Normenboek Gemeentelijk Groen. In het Normenboek NBL staan tijd- en kostennormen voor maatregelen die...

Visit normenboek.nl

Key Findings

We analyzed Normenboek.nl page load time and found that the first response time was 468 ms and then it took 1.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

normenboek.nl performance score

95

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.8 s

90/100

10%

LCP (Largest Contentful Paint)

Value1.8 s

99/100

25%

SI (Speed Index)

Value2.4 s

98/100

10%

TBT (Total Blocking Time)

Value60 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.16

73/100

15%

TTI (Time to Interactive)

Value1.9 s

100/100

10%

Network Requests Diagram

normenboek.nl

468 ms

logoalterra.gif

193 ms

fotokop6.jpg

556 ms

vbboek1.gif

371 ms

vbcd1.gif

280 ms

Our browser made a total of 8 requests to load all elements on the main page. We found that 75% of them (6 requests) were addressed to the original Normenboek.nl, 25% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (655 ms) belongs to the original domain Normenboek.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 30.0 kB (18%)

Content Size

167.5 kB

After Optimization

137.5 kB

In fact, the total size of Normenboek.nl main page is 167.5 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 5% of websites need less resources to load. Images take 149.3 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 8.7 kB

  • Original 11.3 kB
  • After minification 10.1 kB
  • After compression 2.6 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 1.2 kB, which is 11% 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 8.7 kB or 77% of the original size.

Image Optimization

-14%

Potential reduce by 20.3 kB

  • Original 149.3 kB
  • After minification 129.0 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. Obviously, Normenboek needs image optimization as it can save up to 20.3 kB or 14% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-14%

Potential reduce by 971 B

  • Original 6.8 kB
  • After minification 6.8 kB
  • After compression 5.9 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 971 B or 14% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

7

After Optimization

7

The browser has sent 7 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Normenboek. According to our analytics all requests are already optimized.

Accessibility Review

normenboek.nl accessibility score

66

Accessibility Issues

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

Best Practices

normenboek.nl best practices score

75

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

SEO Factors

normenboek.nl SEO score

67

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

Language and Encoding

  • Language Detected

    NL

  • Language Claimed

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Normenboek.nl can be misinterpreted by Google and other search engines. Our service has detected that Dutch is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Normenboek.nl main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

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