Report Summary

  • 21

    Performance

    Renders faster than
    39% of other websites

  • 75

    Accessibility

    Visual factors better than
    that of 41% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

graviant.nl

Graviant Publishers | De specialist voor: BO, SBO, VO, VSO en passend onderwijs

Page Load Speed

10.6 sec in total

First Response

251 ms

Resources Loaded

8.7 sec

Page Rendered

1.7 sec

graviant.nl screenshot

About Website

Visit graviant.nl now to see the best up-to-date Graviant content and also check out these interesting facts you probably never knew about graviant.nl

Als Graviant educatieve uitgaven zijn al meer dan 35 jaar gespecialiseerd in het ontwikkelen en uitgeven van diverse leermiddelen. Wij lopen hierdoor al jaren voorop op het gebied van o.a. Adhd, Autis...

Visit graviant.nl

Key Findings

We analyzed Graviant.nl page load time and found that the first response time was 251 ms and then it took 10.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

graviant.nl performance score

21

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.1 s

21/100

10%

LCP (Largest Contentful Paint)

Value9.8 s

0/100

25%

SI (Speed Index)

Value18.1 s

0/100

10%

TBT (Total Blocking Time)

Value1,630 ms

12/100

30%

CLS (Cumulative Layout Shift)

Value0.022

100/100

15%

TTI (Time to Interactive)

Value51.1 s

0/100

10%

Network Requests Diagram

graviant.nl

251 ms

www.graviant.nl

757 ms

calendar.css

87 ms

ec.css

174 ms

preload-styles.css

681 ms

Our browser made a total of 284 requests to load all elements on the main page. We found that 90% of them (257 requests) were addressed to the original Graviant.nl, 4% (12 requests) were made to Fonts.gstatic.com and 1% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.6 sec) belongs to the original domain Graviant.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.2 MB (8%)

Content Size

14.8 MB

After Optimization

13.6 MB

In fact, the total size of Graviant.nl main page is 14.8 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. Only a small number of websites need less resources to load. Images take 13.4 MB which makes up the majority of the site volume.

HTML Optimization

-91%

Potential reduce by 208.9 kB

  • Original 230.8 kB
  • After minification 160.4 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. This page needs HTML code to be minified as it can gain 70.4 kB, which is 30% 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 208.9 kB or 91% of the original size.

Image Optimization

-3%

Potential reduce by 453.6 kB

  • Original 13.4 MB
  • After minification 12.9 MB

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. Graviant images are well optimized though.

JavaScript Optimization

-47%

Potential reduce by 478.4 kB

  • Original 1.0 MB
  • After minification 975.8 kB
  • After compression 538.8 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 478.4 kB or 47% of the original size.

CSS Optimization

-33%

Potential reduce by 54.5 kB

  • Original 166.3 kB
  • After minification 166.2 kB
  • After compression 111.8 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. Graviant.nl needs all CSS files to be minified and compressed as it can save up to 54.5 kB or 33% of the original size.

Requests Breakdown

Number of requests can be reduced by 192 (73%)

Requests Now

264

After Optimization

72

The browser has sent 264 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Graviant. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 181 to 1 for JavaScripts and from 13 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

graviant.nl accessibility score

75

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

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

High

Image elements do not have [alt] attributes

High

Links do not have a discernible 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

graviant.nl best practices score

58

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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

graviant.nl SEO score

85

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

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

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 Graviant.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 Graviant.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 Graviant. 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: