Tools & Wizards About Us

Report Summary

  • 24

    Performance

    Renders faster than
    43% of other websites

  • 66

    Accessibility

    Visual factors better than
    that of 31% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 88

    SEO

    Google-friendlier than
    65% of websites

zilverline.com

Zilverline | Software ontwikkeling, Scrum trainingen en Cloud Services

Page Load Speed

3.8 sec in total

First Response

216 ms

Resources Loaded

2.7 sec

Page Rendered

795 ms

About Website

Visit zilverline.com now to see the best up-to-date Zilverline content and also check out these interesting facts you probably never knew about zilverline.com

Zilverline ontwikkelt maatwerk software voor web applicaties, mobiele apps en Internet Of Things. Ervaar onze hooggewaarde agile en scrum trainingen.

Visit zilverline.com

Key Findings

We analyzed Zilverline.com page load time and found that the first response time was 216 ms and then it took 3.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

zilverline.com performance score

24

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value10.3 s

0/100

10%

LCP (Largest Contentful Paint)

Value15.0 s

0/100

25%

SI (Speed Index)

Value10.4 s

8/100

10%

TBT (Total Blocking Time)

Value1,060 ms

25/100

30%

CLS (Cumulative Layout Shift)

Value0.016

100/100

15%

TTI (Time to Interactive)

Value16.9 s

5/100

10%

Network Requests Diagram

zilverline.com

216 ms

zilverline.com

382 ms

www.zilverline.com

541 ms

js

87 ms

pages-3eb487ace092fdbb2e6efc01aaf82650db34ca54b1902f9fc4a11620edb54222.css

252 ms

Our browser made a total of 58 requests to load all elements on the main page. We found that 67% of them (39 requests) were addressed to the original Zilverline.com, 9% (5 requests) were made to Youtube-nocookie.com and 5% (3 requests) were made to Production-public-files-zilverline-com.s3.eu-central-1.amazonaws.com. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Zilverline.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 32.4 kB (4%)

Content Size

890.3 kB

After Optimization

857.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zilverline.com main page is 890.3 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. 65% of websites need less resources to load. Javascripts take 458.1 kB which makes up the majority of the site volume.

HTML Optimization

-71%

Potential reduce by 20.7 kB

  • Original 29.1 kB
  • After minification 25.9 kB
  • After compression 8.5 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 3.2 kB, which is 11% 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 20.7 kB or 71% of the original size.

Image Optimization

-3%

Potential reduce by 7.9 kB

  • Original 306.5 kB
  • After minification 298.6 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. Zilverline images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 3.7 kB

  • Original 458.1 kB
  • After minification 458.1 kB
  • After compression 454.4 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. This website has mostly compressed JavaScripts.

CSS Optimization

-0%

Potential reduce by 147 B

  • Original 96.6 kB
  • After minification 96.6 kB
  • After compression 96.4 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. Zilverline.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 10 (21%)

Requests Now

48

After Optimization

38

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 48 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zilverline. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

zilverline.com accessibility score

66

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

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

zilverline.com 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

zilverline.com SEO score

88

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

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    NL

  • Language Claimed

    NL

  • Encoding

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zilverline.com 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 Zilverline.com main page’s claimed encoding is . 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 Zilverline. 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: