Tools & Wizards About Us
zollaed.nl screenshot

Report Summary

  • 15

    Performance

    Renders faster than
    27% of other websites

  • 79

    Accessibility

    Visual factors better than
    that of 47% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

zollaed.nl

Medical Devices and Technology Solutions - ZOLL Medical

Page Load Speed

2.6 sec in total

First Response

407 ms

Resources Loaded

2 sec

Page Rendered

193 ms

zollaed.nl screenshot

About Website

Welcome to zollaed.nl homepage info - get ready to check ZOLL Aed best content right away, or after learning these important things about zollaed.nl

For over 25 years, ZOLL has been a leader in developing medical devices and software solutions that advance emergency care and help save lives. Learn more about our resuscitation and critical care sol...

Visit zollaed.nl

Key Findings

We analyzed Zollaed.nl page load time and found that the first response time was 407 ms and then it took 2.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

zollaed.nl performance score

15

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.9 s

10/100

10%

LCP (Largest Contentful Paint)

Value46.9 s

0/100

25%

SI (Speed Index)

Value17.2 s

0/100

10%

TBT (Total Blocking Time)

Value16,800 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.095

91/100

15%

TTI (Time to Interactive)

Value25.2 s

0/100

10%

Network Requests Diagram

www.zollaed.nl

407 ms

prototype.js

401 ms

jquery-1.10.2.min.js

428 ms

noconflict.js

168 ms

ccard.js

177 ms

Our browser made a total of 45 requests to load all elements on the main page. We found that 69% of them (31 requests) were addressed to the original Zollaed.nl, 16% (7 requests) were made to Fonts.gstatic.com and 7% (3 requests) were made to S.ytimg.com. The less responsive or slowest element that took the longest time to load (798 ms) belongs to the original domain Zollaed.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 566.1 kB (71%)

Content Size

802.7 kB

After Optimization

236.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zollaed.nl main page is 802.7 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. 70% of websites need less resources to load. CSS take 482.0 kB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 16.9 kB

  • Original 22.7 kB
  • After minification 20.8 kB
  • After compression 5.9 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. 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 16.9 kB or 74% of the original size.

Image Optimization

-2%

Potential reduce by 1.9 kB

  • Original 90.8 kB
  • After minification 88.9 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. ZOLL Aed images are well optimized though.

JavaScript Optimization

-65%

Potential reduce by 134.6 kB

  • Original 207.2 kB
  • After minification 207.1 kB
  • After compression 72.6 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 134.6 kB or 65% of the original size.

CSS Optimization

-86%

Potential reduce by 412.7 kB

  • Original 482.0 kB
  • After minification 419.4 kB
  • After compression 69.3 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. Zollaed.nl needs all CSS files to be minified and compressed as it can save up to 412.7 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 31 (84%)

Requests Now

37

After Optimization

6

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 37 CSS, Javascripts, AJAX and image requests in order to completely render the main page of ZOLL Aed. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 29 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

www.zollaed.nl

www.zollaed.nl

407 ms

prototype.js

prototype.js

401 ms

jquery-1.10.2.min.js

jquery-1.10.2.min.js

428 ms

noconflict.js

noconflict.js

168 ms

ccard.js

ccard.js

177 ms

validation.js

validation.js

360 ms

builder.js

builder.js

181 ms

effects.js

effects.js

332 ms

dragdrop.js

dragdrop.js

347 ms

controls.js

controls.js

360 ms

slider.js

slider.js

464 ms

js.js

js.js

467 ms

form.js

form.js

469 ms

translate.js

translate.js

470 ms

cookies.js

cookies.js

479 ms

modernizr.custom.min.js

modernizr.custom.min.js

493 ms

selectivizr.js

selectivizr.js

497 ms

matchMedia.js

matchMedia.js

519 ms

matchMedia.addListener.js

matchMedia.addListener.js

537 ms

enquire.js

enquire.js

539 ms

app.js

app.js

558 ms

jquery.cycle2.min.js

jquery.cycle2.min.js

573 ms

jquery.cycle2.swipe.min.js

jquery.cycle2.swipe.min.js

579 ms

slideshow.js

slideshow.js

603 ms

imagesloaded.js

imagesloaded.js

626 ms

minicart.js

minicart.js

628 ms

css

css

22 ms

styles.css

styles.css

798 ms

madisonisland.css

madisonisland.css

655 ms

logo.gif

logo.gif

90 ms

icon_sprite.png

icon_sprite.png

95 ms

col_right_callout_2_1.png

col_right_callout_2_1.png

438 ms

HpyIsCcidMk

HpyIsCcidMk

120 ms

bIcY3_3JNqUVRAQQRNVteQ.ttf

bIcY3_3JNqUVRAQQRNVteQ.ttf

55 ms

CcKI4k9un7TZVWzRVT-T8y3USBnSvpkopQaUR-2r7iU.ttf

CcKI4k9un7TZVWzRVT-T8y3USBnSvpkopQaUR-2r7iU.ttf

58 ms

-_Ctzj9b56b8RgXW8FAriS3USBnSvpkopQaUR-2r7iU.ttf

-_Ctzj9b56b8RgXW8FAriS3USBnSvpkopQaUR-2r7iU.ttf

59 ms

xkvoNo9fC8O2RDydKj12by3USBnSvpkopQaUR-2r7iU.ttf

xkvoNo9fC8O2RDydKj12by3USBnSvpkopQaUR-2r7iU.ttf

77 ms

JbtMzqLaYbbbCL9X6EvaIy3USBnSvpkopQaUR-2r7iU.ttf

JbtMzqLaYbbbCL9X6EvaIy3USBnSvpkopQaUR-2r7iU.ttf

71 ms

www-embed-player-vflfNyN_r.css

www-embed-player-vflfNyN_r.css

51 ms

www-embed-player.js

www-embed-player.js

90 ms

base.js

base.js

157 ms

fBnyGA8Aionz5086-mElmoOSPUuyQ1M9Un647_EjucU.js

fBnyGA8Aionz5086-mElmoOSPUuyQ1M9Un647_EjucU.js

45 ms

ad_status.js

ad_status.js

41 ms

2UX7WLTfW3W8TclTUvlFyQ.woff

2UX7WLTfW3W8TclTUvlFyQ.woff

38 ms

RxZJdnzeo3R5zSexge8UUT8E0i7KZn-EPnyo3HZu7kw.woff

RxZJdnzeo3R5zSexge8UUT8E0i7KZn-EPnyo3HZu7kw.woff

40 ms

Accessibility Review

zollaed.nl accessibility score

79

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

zollaed.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

Page has valid source maps

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

zollaed.nl SEO score

77

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

Links do not have descriptive text

High

Image elements do not have [alt] attributes

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

    EN

  • Language Claimed

    NL

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zollaed.nl can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it does not match the claimed Dutch language. Our system also found out that Zollaed.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

zollaed.nl

Open Graph description is not detected on the main page of ZOLL Aed. 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: