Report Summary

  • 27

    Performance

    Renders faster than
    47% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 69% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 98

    SEO

    Google-friendlier than
    92% of websites

zm-online.de

Das News-Portal der Zahnärztlichen Mitteilungen - zm-online

Page Load Speed

5.3 sec in total

First Response

301 ms

Resources Loaded

4.4 sec

Page Rendered

559 ms

zm-online.de screenshot

About Website

Visit zm-online.de now to see the best up-to-date Zm Online content for Germany and also check out these interesting facts you probably never knew about zm-online.de

Online-Angebot der Zahnärztlichen Mitteilungen mit Heftarchiv, kostenlosen CME-Fortbildungen, Nachrichten, Filmen und Blogs.

Visit zm-online.de

Key Findings

We analyzed Zm-online.de page load time and found that the first response time was 301 ms and then it took 5 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

zm-online.de performance score

27

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.1 s

9/100

10%

LCP (Largest Contentful Paint)

Value9.1 s

1/100

25%

SI (Speed Index)

Value6.6 s

37/100

10%

TBT (Total Blocking Time)

Value940 ms

29/100

30%

CLS (Cumulative Layout Shift)

Value0.158

73/100

15%

TTI (Time to Interactive)

Value10.9 s

21/100

10%

Network Requests Diagram

zm-online.de

301 ms

www.zm-online.de

641 ms

style_uncompressed.css

425 ms

modernizr-2.5.3.cust.min.js

203 ms

css_browser_selector.js

205 ms

Our browser made a total of 161 requests to load all elements on the main page. We found that 86% of them (139 requests) were addressed to the original Zm-online.de, 3% (5 requests) were made to Daev.adspirit.de and 1% (2 requests) were made to Google.com. The less responsive or slowest element that took the longest time to load (1.8 sec) belongs to the original domain Zm-online.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 996.5 kB (28%)

Content Size

3.6 MB

After Optimization

2.6 MB

In fact, the total size of Zm-online.de main page is 3.6 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. 55% of websites need less resources to load. Images take 1.9 MB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 122.9 kB

  • Original 157.4 kB
  • After minification 138.0 kB
  • After compression 34.5 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 19.3 kB, which is 12% 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 122.9 kB or 78% of the original size.

Image Optimization

-3%

Potential reduce by 63.1 kB

  • Original 1.9 MB
  • After minification 1.8 MB

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. Zm Online images are well optimized though.

JavaScript Optimization

-69%

Potential reduce by 810.5 kB

  • Original 1.2 MB
  • After minification 1.1 MB
  • After compression 365.6 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 810.5 kB or 69% of the original size.

CSS Optimization

-0%

Potential reduce by 0 B

  • Original 360.5 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.

Requests Breakdown

Number of requests can be reduced by 43 (28%)

Requests Now

155

After Optimization

112

The browser has sent 155 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zm Online. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 28 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

zm-online.de accessibility score

88

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 input fields do not have accessible names

High

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

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

zm-online.de 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

zm-online.de 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

    DE

  • Language Claimed

    DE

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zm-online.de can be misinterpreted by Google and other search engines. Our service has detected that German is used on the page, and it matches the claimed language. Our system also found out that Zm-online.de 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 Zm Online. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: