Tools & Wizards About Us
schoolwijzer.amsterdam.nl screenshot

Report Summary

  • 59

    Performance

    Renders faster than
    75% of other websites

  • 81

    Accessibility

    Visual factors better than
    that of 52% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 98

    SEO

    Google-friendlier than
    92% of websites

schoolwijzer.amsterdam.nl

Home - Schoolwijzer Amsterdam

Page Load Speed

2.4 sec in total

First Response

519 ms

Resources Loaded

1.7 sec

Page Rendered

206 ms

schoolwijzer.amsterdam.nl screenshot

About Website

Visit schoolwijzer.amsterdam.nl now to see the best up-to-date Schoolwijzer Amsterdam content for Netherlands and also check out these interesting facts you probably never knew about schoolwijzer.amsterdam.nl

Op Schoolwijzer vindt u informatie over alle erkende voorscholen en alle scholen in het basisonderwijs en het voortgezet onderwijs in Amsterdam. De scholen stellen zich kort voor, u ziet welke scholen...

Visit schoolwijzer.amsterdam.nl

Key Findings

We analyzed Schoolwijzer.amsterdam.nl page load time and found that the first response time was 519 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 35% of websites can load faster.

Performance Metrics

schoolwijzer.amsterdam.nl performance score

59

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.7 s

61/100

10%

LCP (Largest Contentful Paint)

Value5.4 s

20/100

25%

SI (Speed Index)

Value4.4 s

75/100

10%

TBT (Total Blocking Time)

Value440 ms

63/100

30%

CLS (Cumulative Layout Shift)

Value0.072

96/100

15%

TTI (Time to Interactive)

Value5.9 s

66/100

10%

Network Requests Diagram

519 ms

base.css

249 ms

main.js

331 ms

gtm.js

46 ms

andreas.svg

323 ms

Our browser made a total of 14 requests to load all elements on the main page. We found that 50% of them (7 requests) were addressed to the original Schoolwijzer.amsterdam.nl, 21% (3 requests) were made to Static.schoolwijzer.amsterdam.nl.s3-eu-west-1.amazonaws.com and 21% (3 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (519 ms) belongs to the original domain Schoolwijzer.amsterdam.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 446.4 kB (63%)

Content Size

708.1 kB

After Optimization

261.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Schoolwijzer.amsterdam.nl main page is 708.1 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. 25% of websites need less resources to load. Javascripts take 296.0 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 131.7 kB

  • Original 159.9 kB
  • After minification 156.9 kB
  • After compression 28.2 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 131.7 kB or 82% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 110.2 kB
  • After minification 110.2 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. Schoolwijzer Amsterdam images are well optimized though.

JavaScript Optimization

-66%

Potential reduce by 195.9 kB

  • Original 296.0 kB
  • After minification 296.0 kB
  • After compression 100.0 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 195.9 kB or 66% of the original size.

CSS Optimization

-84%

Potential reduce by 118.7 kB

  • Original 142.0 kB
  • After minification 141.9 kB
  • After compression 23.3 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. Schoolwijzer.amsterdam.nl needs all CSS files to be minified and compressed as it can save up to 118.7 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 3 (30%)

Requests Now

10

After Optimization

7

  • Images
  • JavaScript
  • CSS

The browser has sent 10 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Schoolwijzer Amsterdam. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

519 ms

base.css

base.css

249 ms

main.js

main.js

331 ms

gtm.js

gtm.js

46 ms

andreas.svg

andreas.svg

323 ms

7147ec3a-8ff8-4ec9-8c5c-bd1571dc6ae6.woff

7147ec3a-8ff8-4ec9-8c5c-bd1571dc6ae6.woff

82 ms

939cba03-5b40-4d01-9bc5-7589eca863db.woff

939cba03-5b40-4d01-9bc5-7589eca863db.woff

325 ms

icons.woff

icons.woff

302 ms

analytics.js

analytics.js

8 ms

collect

collect

14 ms

collect

collect

82 ms

1

1

190 ms

intro-header-bg.jpg

intro-header-bg.jpg

347 ms

page-curl.png

page-curl.png

184 ms

Accessibility Review

schoolwijzer.amsterdam.nl accessibility score

81

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

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

Form elements do not have associated labels

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Some elements have a [tabindex] value greater than 0

Best Practices

schoolwijzer.amsterdam.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

High

Page has valid source maps

SEO Factors

schoolwijzer.amsterdam.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 Schoolwijzer.amsterdam.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 Schoolwijzer.amsterdam.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

schoolwijzer.amsterdam.nl

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