Tools & Wizards About Us
dorner-verlag.at screenshot

Report Summary

  • 67

    Performance

    Renders faster than
    79% of other websites

  • 90

    Accessibility

    Visual factors better than
    that of 74% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

dorner-verlag.at

Pädagog*innen – Westermann

Page Load Speed

3.5 sec in total

First Response

336 ms

Resources Loaded

2.7 sec

Page Rendered

443 ms

dorner-verlag.at screenshot

About Website

Welcome to dorner-verlag.at homepage info - get ready to check Dorner Verlag best content for Germany right away, or after learning these important things about dorner-verlag.at

Die Verlage Westermann & Hölzel bieten Schulbücher & digitale Lernmedien für alle Schulstufen. Innovativ, praxisnah und verlässlich für einen modernen Unterrich

Visit dorner-verlag.at

Key Findings

We analyzed Dorner-verlag.at page load time and found that the first response time was 336 ms and then it took 3.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

dorner-verlag.at performance score

67

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

46/100

10%

LCP (Largest Contentful Paint)

Value5.6 s

17/100

25%

SI (Speed Index)

Value4.7 s

69/100

10%

TBT (Total Blocking Time)

Value100 ms

98/100

30%

CLS (Cumulative Layout Shift)

Value0.07

96/100

15%

TTI (Time to Interactive)

Value5.5 s

70/100

10%

Network Requests Diagram

dorner-verlag.at

336 ms

www.westermann.at

789 ms

crossdomain.js

106 ms

loader.js

50 ms

econda-recommendations.js

314 ms

Our browser made a total of 31 requests to load all elements on the main page. We found that 3% of them (1 request) were addressed to the original Dorner-verlag.at, 48% (15 requests) were made to Westermann.at and 45% (14 requests) were made to C.wgr.de. The less responsive or slowest element that took the longest time to load (1.2 sec) relates to the external source C.wgr.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 89.1 kB (2%)

Content Size

4.2 MB

After Optimization

4.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Dorner-verlag.at main page is 4.2 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 4.0 MB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 43.8 kB

  • Original 55.8 kB
  • After minification 55.1 kB
  • After compression 12.0 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 43.8 kB or 78% of the original size.

Image Optimization

-0%

Potential reduce by 2.7 kB

  • Original 4.0 MB
  • After minification 4.0 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. Dorner Verlag images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 11 B

  • Original 20.8 kB
  • After minification 20.8 kB
  • After compression 20.8 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

-51%

Potential reduce by 42.6 kB

  • Original 84.1 kB
  • After minification 74.5 kB
  • After compression 41.5 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. Dorner-verlag.at needs all CSS files to be minified and compressed as it can save up to 42.6 kB or 51% of the original size.

Requests Breakdown

Number of requests can be reduced by 7 (25%)

Requests Now

28

After Optimization

21

  • Images
  • JavaScript
  • CSS

The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dorner 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 5 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

dorner-verlag.at

dorner-verlag.at

336 ms

www.westermann.at

www.westermann.at

789 ms

crossdomain.js

crossdomain.js

106 ms

loader.js

loader.js

50 ms

econda-recommendations.js

econda-recommendations.js

314 ms

remixicon.css

remixicon.css

421 ms

fonts.css

fonts.css

330 ms

app.css

app.css

428 ms

west.css

west.css

329 ms

app.js

app.js

533 ms

west.js

west.js

424 ms

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ba223537370e8855fbc8f9288d6ba8c5ff0962465bc1b6a0c26175a2d0b5d490.png.png

1129 ms

Kombi_grau.svg

Kombi_grau.svg

206 ms

flag_at.svg

flag_at.svg

205 ms

flag_de.svg

flag_de.svg

208 ms

flag_ch.svg

flag_ch.svg

208 ms

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930 ms

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1033 ms

e263f6715a6b740bceb1e2ff5b74511bfb1645c510c886c31f5a76ca85512b8f.jpg.png

e263f6715a6b740bceb1e2ff5b74511bfb1645c510c886c31f5a76ca85512b8f.jpg.png

833 ms

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dbbf72703bfdfbcc014081cdefc67b413f54d03ab9eef79d4bbd55cd60fa1741.png.png

839 ms

bd37b601674781ca4d987aa6e6cd67c0298f3553702e780a1c9b616f460e2c1b.png.png

bd37b601674781ca4d987aa6e6cd67c0298f3553702e780a1c9b616f460e2c1b.png.png

840 ms

893847335903cb35b8be0108cff2ade55c27591a2ea4a68a800adb19d8544f98.png.png

893847335903cb35b8be0108cff2ade55c27591a2ea4a68a800adb19d8544f98.png.png

1034 ms

f0ddd0590bbe3ef60f3989405c101af97d2de79829f8b883d5fec86ecad030bd.png.png

f0ddd0590bbe3ef60f3989405c101af97d2de79829f8b883d5fec86ecad030bd.png.png

1040 ms

12790b542ea0acb04fc273b28c21a23d8280bf840d3fe0a17e191efe394df970.jpg.png

12790b542ea0acb04fc273b28c21a23d8280bf840d3fe0a17e191efe394df970.jpg.png

941 ms

85ef468f407442613f0276a2768562c55a3b6d166e6386ad23509341fb10f12c.jpg.png

85ef468f407442613f0276a2768562c55a3b6d166e6386ad23509341fb10f12c.jpg.png

1030 ms

82bf3256424cecbbe4cdea99c88e5a5aaa3b9cae16629634b267d06c38a2b348.jpg.png

82bf3256424cecbbe4cdea99c88e5a5aaa3b9cae16629634b267d06c38a2b348.jpg.png

1141 ms

603201fe3e1e0247bd82c63f40aaa34738363c8f766e9f4a1bc056aad29c327c.jpg.png

603201fe3e1e0247bd82c63f40aaa34738363c8f766e9f4a1bc056aad29c327c.jpg.png

1132 ms

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94d5cc31a9d3fd1346bd19bf584d852b8ca0c7a9028bf59b937aca7498ec348d.png.png

1136 ms

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c4b2de59e0c138ef48f940ae2ef48898bbc1342d111567ac594d93410fa32df6.png.png

1236 ms

questionnaire-line-round.svg

questionnaire-line-round.svg

114 ms

remixicon.woff

remixicon.woff

432 ms

Accessibility Review

dorner-verlag.at accessibility score

90

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.

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

dorner-verlag.at best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

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

dorner-verlag.at 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

    DE

  • Language Claimed

    DE

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Dorner-verlag.at 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 Dorner-verlag.at 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

dorner-verlag.at

Open Graph description is not detected on the main page of Dorner 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: