Access kohlverlag.de. Unterrichtsmaterial für Lehrer von Kohl-Verlag für erfolgreiches Unterrichten und Lernen

name

value

score

weighting

FCP (First Contentful Paint)

Value2.7 s

59/100

10%

LCP (Largest Contentful Paint)

Value6.1 s

12/100

25%

SI (Speed Index)

Value5.3 s

59/100

10%

TBT (Total Blocking Time)

Value1,050 ms

25/100

30%

CLS (Cumulative Layout Shift)

Value0.195

63/100

15%

TTI (Time to Interactive)

Value5.6 s

69/100

10%

kohlverlag.de

320 ms

www.kohlverlag.de

888 ms

reset.css

219 ms

jquery.fancybox-1.3.4.cms.css

215 ms

base.css

219 ms

Our browser made a total of 91 requests to load all elements on the main page. We found that 96% of them (87 requests) were addressed to the original Kohlverlag.de, 2% (2 requests) were made to Google-analytics.com and 1% (1 request) were made to Code.etracker.com. The less responsive or slowest element that took the longest time to load (2.2 sec) belongs to the original domain Kohlverlag.de.

Content Size

2.2 MB

After Optimization

1.5 MB

In fact, the total size of Kohlverlag.de main page is 2.2 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 1.6 MB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 37.3 kB

Original 47.8 kB
After minification 42.4 kB
After compression 10.4 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 5.4 kB, which is 11% 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 37.3 kB or 78% of the original size.

Image Optimization

-14%

Potential reduce by 212.4 kB

Original 1.6 MB
After minification 1.4 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. Obviously, Kohl Verlag needs image optimization as it can save up to 212.4 kB or 14% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-71%

Potential reduce by 301.0 kB

Original 422.4 kB
After minification 388.7 kB
After compression 121.4 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 301.0 kB or 71% of the original size.

CSS Optimization

-85%

Potential reduce by 103.1 kB

Original 120.9 kB
After minification 86.3 kB
After compression 17.8 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. Kohlverlag.de needs all CSS files to be minified and compressed as it can save up to 103.1 kB or 85% of the original size.

Requests Now

After Optimization

The browser has sent 89 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Kohl 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 15 to 1 for JavaScripts and from 15 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

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.

High

[aria-*] attributes do not match their roles

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.

High

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

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/).

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 Kohlverlag.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 Kohlverlag.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

kohlverlag.de

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

Report Summary

Performance

Accessibility

Best Practices

SEO

Unterrichtsmaterial für Lehrer von Kohl-Verlag für erfolgreiches Unterrichten und Lernen

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

kohlverlag.de

www.kohlverlag.de

reset.css

jquery.fancybox-1.3.4.cms.css

base.css

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

kohlverlag.de

www.kohlverlag.de

reset.css

jquery.fancybox-1.3.4.cms.css

base.css

jquery-ui-custom.css

cms-ui-extension.css

jquery-ui-fixes.css

base.css

slider.css

jquery-ui-fixes.css

slider.css

style.css

styles.css

sliderParagraph.css

jquery.contextMenu.css

ajax.css

helpers.js

jquery-1.7.2.min.js

jquery-ui-1.8.7.custom.min.js

jquery.ui.datepicker-de.js

jquery.fancybox-1.3.4.pack.js

jquery.cycle.all.js

googleanalytics.js

searchbar.js

jquery.smoothDivScroll-1.1-min.js

form.js

ajax.js

jquery.contextMenu.cms.js

ga.js

bg-header2.jpg

retropixel.gif

teaser-tafeltext.png

warenkorb-hover-postit.jpg

icon-phone-white.png

thumb.jpg

thumb.jpg

thumb.jpg

thumb.jpg

thumb.jpg

thumb.jpg

thumb.jpg

thumb.jpg