Report Summary

  • 44

    Performance

    Renders faster than
    64% of other websites

  • 94

    Accessibility

    Visual factors better than
    that of 84% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 90

    SEO

    Google-friendlier than
    69% of websites

gsm4all.nl

Refurbished Apple iPhone en iPad met keurmerk! - QUAPP

Page Load Speed

2 sec in total

First Response

512 ms

Resources Loaded

1.4 sec

Page Rendered

142 ms

gsm4all.nl screenshot

About Website

Click here to check amazing Gsm 4 All content. Otherwise, check out these important facts you probably never knew about gsm4all.nl

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Key Findings

We analyzed Gsm4all.nl page load time and found that the first response time was 512 ms and then it took 1.5 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

gsm4all.nl performance score

44

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.4 s

37/100

10%

LCP (Largest Contentful Paint)

Value6.0 s

13/100

25%

SI (Speed Index)

Value7.8 s

24/100

10%

TBT (Total Blocking Time)

Value230 ms

87/100

30%

CLS (Cumulative Layout Shift)

Value0.389

26/100

15%

TTI (Time to Interactive)

Value7.3 s

50/100

10%

Network Requests Diagram

gsm4all.nl

512 ms

style_gsm.css

257 ms

gsm4all_2006-12.gif

178 ms

fotobalk.gif

412 ms

alleoperators_100x48-200605.gif

169 ms

Our browser made a total of 24 requests to load all elements on the main page. We found that 83% of them (20 requests) were addressed to the original Gsm4all.nl, 8% (2 requests) were made to 985.2j.nl and 8% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (743 ms) relates to the external source 985.2j.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 49.9 kB (35%)

Content Size

143.6 kB

After Optimization

93.8 kB

In fact, the total size of Gsm4all.nl main page is 143.6 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. 20% of websites need less resources to load. Images take 81.8 kB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 26.2 kB

  • Original 31.5 kB
  • After minification 26.3 kB
  • After compression 5.3 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 5.2 kB, which is 16% 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 26.2 kB or 83% of the original size.

Image Optimization

-1%

Potential reduce by 439 B

  • Original 81.8 kB
  • After minification 81.4 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. Gsm 4 All images are well optimized though.

JavaScript Optimization

-73%

Potential reduce by 17.0 kB

  • Original 23.2 kB
  • After minification 19.5 kB
  • After compression 6.2 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 17.0 kB or 73% of the original size.

CSS Optimization

-88%

Potential reduce by 6.3 kB

  • Original 7.1 kB
  • After minification 5.0 kB
  • After compression 828 B

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. Gsm4all.nl needs all CSS files to be minified and compressed as it can save up to 6.3 kB or 88% of the original size.

Requests Breakdown

Number of requests can be reduced by 6 (26%)

Requests Now

23

After Optimization

17

The browser has sent 23 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Gsm 4 All. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Accessibility Review

gsm4all.nl accessibility score

94

Accessibility Issues

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

Links do not have a discernible name

Best Practices

gsm4all.nl best practices score

75

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

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

gsm4all.nl SEO score

90

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

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

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Gsm4all.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 Gsm4all.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 Gsm 4 All. 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: