Report Summary

  • 17

    Performance

    Renders faster than
    32% of other websites

  • 92

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 93

    SEO

    Google-friendlier than
    84% of websites

ns.nl

Welkom op de website van NS | NS

Page Load Speed

1.7 sec in total

First Response

281 ms

Resources Loaded

1.2 sec

Page Rendered

194 ms

ns.nl screenshot

About Website

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

Reisplanner voor binnenlandse en internationale treinreizen, informatie over prijzen van treinkaartjes en abonnementen, tips voor dagjes uit en informatie

Visit ns.nl

Key Findings

We analyzed Ns.nl page load time and found that the first response time was 281 ms and then it took 1.4 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.

Performance Metrics

ns.nl performance score

17

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.8 s

56/100

10%

LCP (Largest Contentful Paint)

Value12.1 s

0/100

25%

SI (Speed Index)

Value5.4 s

56/100

10%

TBT (Total Blocking Time)

Value2,430 ms

5/100

30%

CLS (Cumulative Layout Shift)

Value0.485

17/100

15%

TTI (Time to Interactive)

Value12.3 s

15/100

10%

Network Requests Diagram

ns.nl

281 ms

www.ns.nl

513 ms

1062-v1.js

340 ms

generic.min.css

13 ms

cms.min.css

28 ms

Our browser made a total of 20 requests to load all elements on the main page. We found that 95% of them (19 requests) were addressed to the original Ns.nl, 5% (1 request) were made to Tdn.r42tag.com. The less responsive or slowest element that took the longest time to load (513 ms) belongs to the original domain Ns.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 2.0 MB (79%)

Content Size

2.5 MB

After Optimization

512.9 kB

In fact, the total size of Ns.nl main page is 2.5 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. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Javascripts take 1.2 MB which makes up the majority of the site volume.

HTML Optimization

-94%

Potential reduce by 197.6 kB

  • Original 211.3 kB
  • After minification 93.1 kB
  • After compression 13.7 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 118.1 kB, which is 56% 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 197.6 kB or 94% of the original size.

Image Optimization

-4%

Potential reduce by 1.0 kB

  • Original 24.3 kB
  • After minification 23.3 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. NS images are well optimized though.

JavaScript Optimization

-70%

Potential reduce by 807.6 kB

  • Original 1.2 MB
  • After minification 1.2 MB
  • After compression 346.0 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 807.6 kB or 70% of the original size.

CSS Optimization

-88%

Potential reduce by 975.4 kB

  • Original 1.1 MB
  • After minification 1.1 MB
  • After compression 130.0 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. Ns.nl needs all CSS files to be minified and compressed as it can save up to 975.4 kB or 88% of the original size.

Requests Breakdown

Number of requests can be reduced by 4 (25%)

Requests Now

16

After Optimization

12

The browser has sent 16 CSS, Javascripts, AJAX and image requests in order to completely render the main page of NS. 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.

Accessibility Review

ns.nl accessibility score

92

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 have valid values

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

ns.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

Missing source maps for large first-party JavaScript

SEO Factors

ns.nl SEO score

93

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

Document doesn't have a valid hreflang

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 Ns.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 Ns.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 data is detected on the main page of NS. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: