Report Summary

  • 6

    Performance

    Renders faster than
    30% of other websites

  • 76

    Accessibility

    Visual factors better than
    that of 52% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    65% of websites

  • 79

    SEO

    Google-friendlier than
    48% of websites

stark-verlag.de

Lehr- & Lernmaterialien für Schule, Studium & Beruf | Pearson & STARK Verlag

Page Load Speed

4.8 sec in total

First Response

336 ms

Resources Loaded

4.1 sec

Page Rendered

327 ms

stark-verlag.de screenshot

About Website

Click here to check amazing STARK Verlag content for Germany. Otherwise, check out these important facts you probably never knew about stark-verlag.de

Lehrmaterialien & Lernhilfen – auch online – für Schule, Studium und Beruf. Mit unseren Produkten & Inhalten erfolgreich jede Lernphasen bestehen.

Visit stark-verlag.de

Key Findings

We analyzed Stark-verlag.de page load time and found that the first response time was 336 ms and then it took 4.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

stark-verlag.de performance score

6

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

35/100

10%

LCP (Largest Contentful Paint)

Value15.3 s

0/100

25%

SI (Speed Index)

Value9.7 s

11/100

10%

TBT (Total Blocking Time)

Value3,130 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value3.275

0/100

15%

TTI (Time to Interactive)

Value18.1 s

3/100

10%

Network Requests Diagram

stark-verlag.de

336 ms

www.stark-verlag.de

1413 ms

3stark.css

293 ms

stark-shop.css

533 ms

mootools-core.js

770 ms

Our browser made a total of 109 requests to load all elements on the main page. We found that 97% of them (106 requests) were addressed to the original Stark-verlag.de, 2% (2 requests) were made to Ssl.google-analytics.com and 1% (1 request) were made to Pedaff.webpartner.de. The less responsive or slowest element that took the longest time to load (1.4 sec) belongs to the original domain Stark-verlag.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 382.5 kB (29%)

Content Size

1.3 MB

After Optimization

949.3 kB

In fact, the total size of Stark-verlag.de main page is 1.3 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. 50% of websites need less resources to load. Images take 908.3 kB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 60.5 kB

  • Original 73.4 kB
  • After minification 64.8 kB
  • After compression 12.8 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 8.5 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 60.5 kB or 83% of the original size.

Image Optimization

-7%

Potential reduce by 59.6 kB

  • Original 908.3 kB
  • After minification 848.7 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. STARK Verlag images are well optimized though.

JavaScript Optimization

-74%

Potential reduce by 221.8 kB

  • Original 301.6 kB
  • After minification 266.4 kB
  • After compression 79.7 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 221.8 kB or 74% of the original size.

CSS Optimization

-83%

Potential reduce by 40.6 kB

  • Original 48.6 kB
  • After minification 37.2 kB
  • After compression 8.1 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. Stark-verlag.de needs all CSS files to be minified and compressed as it can save up to 40.6 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 38 (36%)

Requests Now

107

After Optimization

69

The browser has sent 107 CSS, Javascripts, AJAX and image requests in order to completely render the main page of STARK Verlag. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

stark-verlag.de accessibility score

76

Accessibility Issues

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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.

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

stark-verlag.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

stark-verlag.de SEO score

79

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

High

Page is blocked from indexing

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

Language and Encoding

  • Language Detected

    DE

  • 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 Stark-verlag.de can be misinterpreted by Google and other search engines. Our service has detected that German 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 Stark-verlag.de 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 STARK Verlag. 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: