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rulof.org screenshot

Report Summary

  • 76

    Performance

    Renders faster than
    84% of other websites

  • 63

    Accessibility

    Visual factors better than
    that of 28% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

rulof.org

27 books by Jozef Rulof - and an explanation by the publisher

Page Load Speed

2.2 sec in total

First Response

231 ms

Resources Loaded

1.7 sec

Page Rendered

297 ms

rulof.org screenshot

About Website

Click here to check amazing Rulof content for Netherlands. Otherwise, check out these important facts you probably never knew about rulof.org

Here you will find the original 27 books by Jozef Rulof and a description of the core of his vision in an explanation by the publisher.

Visit rulof.org

Key Findings

We analyzed Rulof.org page load time and found that the first response time was 231 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 40% of websites can load faster.

Performance Metrics

rulof.org performance score

76

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

52/100

10%

LCP (Largest Contentful Paint)

Value3.8 s

54/100

25%

SI (Speed Index)

Value3.8 s

84/100

10%

TBT (Total Blocking Time)

Value250 ms

85/100

30%

CLS (Cumulative Layout Shift)

Value0.07

96/100

15%

TTI (Time to Interactive)

Value4.3 s

85/100

10%

Network Requests Diagram

rulof.org

231 ms

tablet.css

676 ms

bucket.css

506 ms

nlboekenrij.png

982 ms

button_delen.png

702 ms

Our browser made a total of 13 requests to load all elements on the main page. We found that 8% of them (1 request) were addressed to the original Rulof.org, 46% (6 requests) were made to Jozefrulof.org and 38% (5 requests) were made to Storage.googleapis.com. The less responsive or slowest element that took the longest time to load (982 ms) relates to the external source Storage.googleapis.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 329.8 kB (24%)

Content Size

1.4 MB

After Optimization

1.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Rulof.org main page is 1.4 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. 20% of websites need less resources to load. Images take 953.8 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 40.1 kB

  • Original 49.4 kB
  • After minification 48.8 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. 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 40.1 kB or 81% of the original size.

Image Optimization

-2%

Potential reduce by 21.0 kB

  • Original 953.8 kB
  • After minification 932.9 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. Rulof images are well optimized though.

JavaScript Optimization

-72%

Potential reduce by 227.3 kB

  • Original 315.6 kB
  • After minification 315.0 kB
  • After compression 88.3 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 227.3 kB or 72% of the original size.

CSS Optimization

-84%

Potential reduce by 41.3 kB

  • Original 48.9 kB
  • After minification 41.7 kB
  • After compression 7.6 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. Rulof.org needs all CSS files to be minified and compressed as it can save up to 41.3 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 4 (33%)

Requests Now

12

After Optimization

8

  • Images
  • JavaScript
  • CSS

The browser has sent 12 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Rulof. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

rulof.org

rulof.org

231 ms

tablet.css

tablet.css

676 ms

bucket.css

bucket.css

506 ms

nlboekenrij.png

nlboekenrij.png

982 ms

button_delen.png

button_delen.png

702 ms

button_pijltjerechts.png

button_pijltjerechts.png

703 ms

jquery-1.9.1.min.js

jquery-1.9.1.min.js

676 ms

jQuery_plugins.js

jQuery_plugins.js

466 ms

jquery-ui.min.js

jquery-ui.min.js

722 ms

bucket-min.js

bucket-min.js

689 ms

js

js

75 ms

zee.jpg

zee.jpg

585 ms

zoeken.png

zoeken.png

688 ms

Accessibility Review

rulof.org accessibility score

63

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

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

Form elements do not have associated labels

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

rulof.org 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

rulof.org 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

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Rulof.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Rulof.org 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

rulof.org

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