Tools & Wizards About Us
klett.de screenshot

Report Summary

  • 49

    Performance

    Renders faster than
    67% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 68% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

klett.de

Ernst Klett Verlag

Page Load Speed

4.8 sec in total

First Response

659 ms

Resources Loaded

2.9 sec

Page Rendered

1.2 sec

klett.de screenshot

About Website

Welcome to klett.de homepage info - get ready to check Klett best content for Germany right away, or after learning these important things about klett.de

Der Ernst Klett Verlag bietet Ihnen eine breitgefächerte Auswahl an Schulbüchern, Lernsoftware und Materialien für Lernende und Lehrende. Besuchen Sie unseren Onlineshop und überzeugen Sie sich selbst...

Visit klett.de

Key Findings

We analyzed Klett.de page load time and found that the first response time was 659 ms and then it took 4.2 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

klett.de performance score

49

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.2 s

42/100

10%

LCP (Largest Contentful Paint)

Value5.5 s

19/100

25%

SI (Speed Index)

Value4.3 s

77/100

10%

TBT (Total Blocking Time)

Value690 ms

43/100

30%

CLS (Cumulative Layout Shift)

Value0.131

81/100

15%

TTI (Time to Interactive)

Value5.7 s

68/100

10%

Network Requests Diagram

www.klett.de

659 ms

app.d6f1f4da.css

188 ms

kui.libs.9b67010c.js

449 ms

runtime.2afdb7da.js

275 ms

splash.10708e07.js

276 ms

Our browser made a total of 41 requests to load all elements on the main page. We found that 98% of them (40 requests) were addressed to the original Klett.de, 2% (1 request) were made to . The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Klett.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 500.7 kB (8%)

Content Size

6.3 MB

After Optimization

5.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Klett.de main page is 6.3 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. 40% of websites need less resources to load. Images take 5.7 MB which makes up the majority of the site volume.

HTML Optimization

-93%

Potential reduce by 109.9 kB

  • Original 117.6 kB
  • After minification 45.9 kB
  • After compression 7.8 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 71.7 kB, which is 61% 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 109.9 kB or 93% of the original size.

Image Optimization

-7%

Potential reduce by 387.4 kB

  • Original 5.7 MB
  • After minification 5.4 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. Klett images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 2.9 kB

  • Original 346.5 kB
  • After minification 346.5 kB
  • After compression 343.6 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. This website has mostly compressed JavaScripts.

CSS Optimization

-1%

Potential reduce by 423 B

  • Original 48.9 kB
  • After minification 48.9 kB
  • After compression 48.5 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. Klett.de has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 3 (8%)

Requests Now

37

After Optimization

34

  • Images
  • JavaScript
  • CSS

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

Network Requests Diagram

www.klett.de

www.klett.de

659 ms

app.d6f1f4da.css

app.d6f1f4da.css

188 ms

kui.libs.9b67010c.js

kui.libs.9b67010c.js

449 ms

runtime.2afdb7da.js

runtime.2afdb7da.js

275 ms

splash.10708e07.js

splash.10708e07.js

276 ms

app.215bb6ef.js

app.215bb6ef.js

716 ms

Reli-Ethik-Blog_Slider_Desktop_neu.jpg

Reli-Ethik-Blog_Slider_Desktop_neu.jpg

185 ms

GuG_BFS_Slider_04_2024.gif

GuG_BFS_Slider_04_2024.gif

898 ms

banner_zebra_2024.jpg

banner_zebra_2024.jpg

358 ms

2024_Aussprachetraining_Slider.jpg

2024_Aussprachetraining_Slider.jpg

355 ms

DKP_slider_de_5sek_1.gif

DKP_slider_de_5sek_1.gif

795 ms

Kachel_NW_Oberstufe_2024.jpg

Kachel_NW_Oberstufe_2024.jpg

546 ms

Zugaenge-digiProdukte_newsbereich_startseite.jpg

Zugaenge-digiProdukte_newsbereich_startseite.jpg

308 ms

Kacheln_MeinKlett.jpg

Kacheln_MeinKlett.jpg

404 ms

starkeLehrkraefte_Kachel_1120x630.jpg

starkeLehrkraefte_Kachel_1120x630.jpg

623 ms

KI_Grafiken_Kachel.jpg

KI_Grafiken_Kachel.jpg

456 ms

Klett_Testen_und_Foerdern_Vorteile_Lernstandsanalyse.jpg

Klett_Testen_und_Foerdern_Vorteile_Lernstandsanalyse.jpg

501 ms

Bild_Artikel_Startseite_klettde_neu.jpg

Bild_Artikel_Startseite_klettde_neu.jpg

551 ms

Kachel_klettde_BNE_Blog_eC.jpg

Kachel_klettde_BNE_Blog_eC.jpg

599 ms

klett-studyly-artikelbild.jpg

klett-studyly-artikelbild.jpg

641 ms

teachkit_Kachel_Startseite_Klett.jpg

teachkit_Kachel_Startseite_Klett.jpg

647 ms

Klett%20Startseite_Empfehlung.jpg

Klett%20Startseite_Empfehlung.jpg

696 ms

Klett-Diagnostik-Kachel.jpg

Klett-Diagnostik-Kachel.jpg

805 ms

Fortbildungen_Kachelbild.jpg

Fortbildungen_Kachelbild.jpg

833 ms

DaZ_Titelbild_klein.jpg

DaZ_Titelbild_klein.jpg

741 ms

Kachel_BL.jpg

Kachel_BL.jpg

792 ms

201105_kachel_startseite_klett_mediathek.png

201105_kachel_startseite_klett_mediathek.png

835 ms

Kachel_GeWi.png

Kachel_GeWi.png

972 ms

TE_22_Blog.jpg

TE_22_Blog.jpg

893 ms

reli_ethik_blog.jpg

reli_ethik_blog.jpg

899 ms

Deutschblog.gif

Deutschblog.gif

927 ms

GrundschulBlog_klett_de.jpg

GrundschulBlog_klett_de.jpg

931 ms

Grafik_Dranbleiben_Kachel.png

Grafik_Dranbleiben_Kachel.png

989 ms

TP.jpg

TP.jpg

990 ms

Lehrer_digitaler_unterricht.jpg

Lehrer_digitaler_unterricht.jpg

994 ms

1120x630_Beethoven.jpg

1120x630_Beethoven.jpg

1041 ms

klett_akademie.gif

klett_akademie.gif

1025 ms

tdu_2024.jpg

tdu_2024.jpg

1070 ms

PoloWeb-Buch.feaa52a1.woff

PoloWeb-Buch.feaa52a1.woff

1045 ms

PoloWeb-Halbfett.7b34ed2c.woff

PoloWeb-Halbfett.7b34ed2c.woff

1044 ms

fPzAngyJAUAAAA=

fPzAngyJAUAAAA=

1 ms

Accessibility Review

klett.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

button, link, and menuitem elements do not have accessible names.

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

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

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>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

klett.de 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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

klett.de SEO score

100

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

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 Klett.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 Klett.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

klett.de

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