Access luebbe.de. Bastei Lübbe | Bücher, eBooks, Hörbücher, Audio-Downloads

name

value

score

weighting

FCP (First Contentful Paint)

Value4.1 s

21/100

10%

LCP (Largest Contentful Paint)

Value6.8 s

7/100

25%

SI (Speed Index)

Value8.4 s

18/100

10%

TBT (Total Blocking Time)

Value670 ms

44/100

30%

CLS (Cumulative Layout Shift)

Value0.233

53/100

15%

TTI (Time to Interactive)

Value8.0 s

42/100

10%

luebbe.de

236 ms

luebbe.de

406 ms

www.luebbe.de

1493 ms

bastei-luebbe.css

104 ms

combined_part_1_custom_1.css

203 ms

Our browser made a total of 80 requests to load all elements on the main page. We found that 88% of them (70 requests) were addressed to the original Luebbe.de, 9% (7 requests) were made to Cloud.ccm19.de and 3% (2 requests) were made to Img.youtube.com. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Luebbe.de.

Content Size

2.6 MB

After Optimization

2.1 MB

In fact, the total size of Luebbe.de main page is 2.6 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. 60% of websites need less resources to load. Images take 1.8 MB which makes up the majority of the site volume.

HTML Optimization

-91%

Potential reduce by 313.3 kB

Original 345.1 kB
After minification 204.9 kB
After compression 31.8 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 140.2 kB, which is 41% 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 313.3 kB or 91% of the original size.

Image Optimization

-2%

Potential reduce by 35.4 kB

Original 1.8 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. Luebbe images are well optimized though.

JavaScript Optimization

-18%

Potential reduce by 70.8 kB

Original 384.5 kB
After minification 384.5 kB
After compression 313.7 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 70.8 kB or 18% of the original size.

CSS Optimization

-28%

Potential reduce by 14.6 kB

Original 52.0 kB
After minification 51.7 kB
After compression 37.4 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. Luebbe.de needs all CSS files to be minified and compressed as it can save up to 14.6 kB or 28% of the original size.

Requests Now

After Optimization

The browser has sent 74 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Luebbe. 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.

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 are not valid or misspelled

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

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.

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

High

Some elements have a [tabindex] value greater than 0

These items highlight common accessibility best practices.

High

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

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Displays images with incorrect aspect ratio

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

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

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 Luebbe.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 Luebbe.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

luebbe.de

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

Bastei Lübbe | Bücher, eBooks, Hörbücher, Audio-Downloads

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

luebbe.de

luebbe.de

www.luebbe.de

bastei-luebbe.css

combined_part_1_custom_1.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

luebbe.de

luebbe.de

www.luebbe.de

bastei-luebbe.css

combined_part_1_custom_1.css

combined_part_1_debug_2.css

app.js

modernizr.js

require.js

app.css

module.js

widget

ae016a50453872ef.jpg

0.jpg

0.jpg

cbe2af002a2a23e6.jpeg

product-ebook.png

d3d5448dac1f16c5.png

eaf9b1b25125a951.jpeg

579092439feb06bb.jpeg

cbe2af002a2a23e6.jpeg

4fdf3a19bc1f5828.jpeg

5b2570c1e1aed186.jpeg

d16892db59ecdec3.jpeg

d4600eac7b62ef0e.jpeg

b17bd7188e144676.jpeg

7eb4ceaad6afd3a3.jpeg

194e98bc43f6b39f.jpeg

3483d89d02f40175.jpeg

7ef41fc1295dbee4.jpeg

aed527f7ab1af451.jpg

01980aebadc958a4.jpeg

6b62bc608fa1c038.jpeg

965e52a8ed604cc1.jpeg

b17bd7188e144676.jpeg

1efcb8fe0d80d7a7.jpeg

82587d8a8efe441a.jpeg

85e2e7880035dbe8.jpeg

55099e38b027a9ee.jpeg

957eee8d601c680f.jpeg

f1363c4d1aec80ed.jpeg

8e152e2f35fc7942.jpeg

766fac7f6da574d7.jpeg