Access mediengeschichte.dnb.de. Deutsches Buch- und Schriftmuseum "Zeichen - Bücher - Netze"

name

value

score

weighting

FCP (First Contentful Paint)

Value5.8 s

4/100

10%

LCP (Largest Contentful Paint)

Value5.8 s

15/100

25%

SI (Speed Index)

Value6.7 s

35/100

10%

TBT (Total Blocking Time)

Value90 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value1

2/100

15%

TTI (Time to Interactive)

Value6.6 s

57/100

10%

home.html

152 ms

main.css

341 ms

dnb.css

332 ms

style.css

335 ms

zoombox.css

338 ms

Our browser made a total of 17 requests to load all elements on the main page. We found that 82% of them (14 requests) were addressed to the original Mediengeschichte.dnb.de, 12% (2 requests) were made to Code.etracker.com and 6% (1 request) were made to Etracker.de. The less responsive or slowest element that took the longest time to load (932 ms) belongs to the original domain Mediengeschichte.dnb.de.

Content Size

62.5 kB

After Optimization

38.4 kB

In fact, the total size of Mediengeschichte.dnb.de main page is 62.5 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 20% of websites need less resources to load. Javascripts take 33.9 kB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 23.8 kB

Original 28.6 kB
After minification 21.6 kB
After compression 4.8 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 7.0 kB, which is 24% 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 23.8 kB or 83% of the original size.

JavaScript Optimization

-1%

Potential reduce by 282 B

Original 33.9 kB
After minification 33.9 kB
After compression 33.6 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.

Requests Now

After Optimization

The browser has sent 14 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Mediengeschichte Dnb. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

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 the experience of reading tabular or list data using assistive technology, like a screen reader.

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.

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

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

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 Mediengeschichte.dnb.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 Mediengeschichte.dnb.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

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