Tools & Wizards About Us
d-nb.de screenshot

Report Summary

  • 10

    Performance

    Renders faster than
    23% of other websites

  • 94

    Accessibility

    Visual factors better than
    that of 83% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

d-nb.de

DNB - Startseite

Page Load Speed

14.6 sec in total

First Response

389 ms

Resources Loaded

13.1 sec

Page Rendered

1.1 sec

d-nb.de screenshot

About Website

Visit d-nb.de now to see the best up-to-date DNB content for Germany and also check out these interesting facts you probably never knew about d-nb.de

Die Deutsche Nationalbibliothek ist die zentrale Archivbibliothek Deutschlands.

Visit d-nb.de

Key Findings

We analyzed D-nb.de page load time and found that the first response time was 389 ms and then it took 14.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

d-nb.de performance score

10

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.7 s

2/100

10%

LCP (Largest Contentful Paint)

Value32.5 s

0/100

25%

SI (Speed Index)

Value25.7 s

0/100

10%

TBT (Total Blocking Time)

Value930 ms

30/100

30%

CLS (Cumulative Layout Shift)

Value0.713

7/100

15%

TTI (Time to Interactive)

Value33.9 s

0/100

10%

Network Requests Diagram

d-nb.de

389 ms

www.d-nb.de

776 ms

www.dnb.de

425 ms

home_node.html

307 ms

normalize.css

6277 ms

Our browser made a total of 69 requests to load all elements on the main page. We found that 3% of them (2 requests) were addressed to the original D-nb.de, 96% (66 requests) were made to Dnb.de and 1% (1 request) were made to Data-8ec206415a.dnb.de. The less responsive or slowest element that took the longest time to load (6.3 sec) relates to the external source Dnb.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 82.9 kB (85%)

Content Size

97.6 kB

After Optimization

14.7 kB

  • HTML
  • JavaScript

In fact, the total size of D-nb.de main page is 97.6 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. 60% of websites need less resources to load. HTML takes 97.3 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 82.9 kB

  • Original 97.3 kB
  • After minification 75.4 kB
  • After compression 14.4 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 21.9 kB, which is 23% 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 82.9 kB or 85% of the original size.

JavaScript Optimization

-4%

Potential reduce by 12 B

  • Original 292 B
  • After minification 292 B
  • After compression 280 B

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 Breakdown

Number of requests can be reduced by 21 (39%)

Requests Now

54

After Optimization

33

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 54 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 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 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

d-nb.de

d-nb.de

389 ms

www.d-nb.de

www.d-nb.de

776 ms

www.dnb.de

www.dnb.de

425 ms

home_node.html

home_node.html

307 ms

normalize.css

normalize.css

6277 ms

_libs.css

_libs.css

2821 ms

small.css

small.css

3230 ms

medium.css

medium.css

3577 ms

large.css

large.css

3766 ms

xlarge.css

xlarge.css

3993 ms

custom.css

custom.css

4348 ms

addon_materna.css

addon_materna.css

4211 ms

stub.js

stub.js

687 ms

global.js

global.js

5722 ms

logo.svg

logo.svg

365 ms

logo.svg

logo.svg

366 ms

globe.png

globe.png

374 ms

sprite.svg

sprite.svg

368 ms

gebaerdensprache_node.jpg

gebaerdensprache_node.jpg

375 ms

leichtesprache_node.svg

leichtesprache_node.svg

376 ms

kontakteFooter_node.svg

kontakteFooter_node.svg

680 ms

konto_icon.svg

konto_icon.svg

376 ms

suche_node.svg

suche_node.svg

676 ms

close_x.svg

close_x.svg

677 ms

Servicesuche_Submit.svg

Servicesuche_Submit.svg

679 ms

01_leipzigEb4Aussen_buehne.jpg

01_leipzigEb4Aussen_buehne.jpg

787 ms

20240502Meinungsfreiheit.png

20240502Meinungsfreiheit.png

1330 ms

berufkarriere_ausbildungDualesstudium_buehne.jpg

berufkarriere_ausbildungDualesstudium_buehne.jpg

2294 ms

pmMindestalter16.jpg

pmMindestalter16.jpg

1245 ms

onlineshop_buehne.png

onlineshop_buehne.png

1349 ms

suchenUndFinden.jpg

suchenUndFinden.jpg

1783 ms

ueberuns_dbsmAugenrausch_buehne.jpg

ueberuns_dbsmAugenrausch_buehne.jpg

1620 ms

ueberuns_nachhaltigkeit_buehne.jpg

ueberuns_nachhaltigkeit_buehne.jpg

1694 ms

20230301DHCall.jpg

20230301DHCall.jpg

2399 ms

dnb_pattern_lightblue.svg

dnb_pattern_lightblue.svg

2604 ms

geisteswissenschaftlicherLesesaal.jpg

geisteswissenschaftlicherLesesaal.jpg

2044 ms

dnb_pattern_lightgreen.svg

dnb_pattern_lightgreen.svg

2153 ms

benutzungseinfuehrungLeipzig.jpg

benutzungseinfuehrungLeipzig.jpg

1895 ms

depotgefluesterWasserzeichenwalzen.jpg

depotgefluesterWasserzeichenwalzen.jpg

2245 ms

fragNach_buehneTeaser.jpg

fragNach_buehneTeaser.jpg

2170 ms

grundgesetz_cteaser.jpg

grundgesetz_cteaser.jpg

2272 ms

dasDenkmal_cteaser.jpg

dasDenkmal_cteaser.jpg

2391 ms

comics_cteaser.jpg

comics_cteaser.jpg

2367 ms

fragNach_cteaser.jpg

fragNach_cteaser.jpg

2386 ms

11_leipzigMuseumslesesaal_zielgruppenmodul.jpg

11_leipzigMuseumslesesaal_zielgruppenmodul.jpg

3306 ms

dbsmNeu_kachel.jpg

dbsmNeu_kachel.jpg

2583 ms

dea_kachel.jpg

dea_kachel.jpg

2522 ms

DMA-kachel.jpg

DMA-kachel.jpg

2523 ms

nav2top-b.svg

nav2top-b.svg

2863 ms

dnb_pattern_yellow.svg

dnb_pattern_yellow.svg

2687 ms

ddbLogo_transparent.png

ddbLogo_transparent.png

2608 ms

bkm_logo.png

bkm_logo.png

2666 ms

Montserrat-Medium.ttf

Montserrat-Medium.ttf

3045 ms

Montserrat-Light.ttf

Montserrat-Light.ttf

3812 ms

Montserrat-SemiBold.ttf

Montserrat-SemiBold.ttf

2962 ms

Montserrat-Bold.ttf

Montserrat-Bold.ttf

2982 ms

CrimsonText-Regular.ttf

CrimsonText-Regular.ttf

2794 ms

CrimsonText-SemiBold.ttf

CrimsonText-SemiBold.ttf

2965 ms

CrimsonText-Bold.ttf

CrimsonText-Bold.ttf

3495 ms

Montserrat-MediumItalic.ttf

Montserrat-MediumItalic.ttf

3675 ms

Montserrat-LightItalic.ttf

Montserrat-LightItalic.ttf

3144 ms

Montserrat-SemiBoldItalic.ttf

Montserrat-SemiBoldItalic.ttf

3161 ms

Montserrat-BoldItalic.ttf

Montserrat-BoldItalic.ttf

2513 ms

MobileNavigation.html

MobileNavigation.html

2901 ms

facebook_w.svg

facebook_w.svg

2989 ms

twitter_w.svg

twitter_w.svg

2441 ms

mail_w.svg

mail_w.svg

2496 ms

copy_w.svg

copy_w.svg

2567 ms

addon_print.css

addon_print.css

114 ms

Accessibility Review

d-nb.de accessibility score

94

Accessibility Issues

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

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

Best Practices

d-nb.de best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

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

d-nb.de SEO score

93

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

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 D-nb.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 D-nb.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

d-nb.de

Open Graph data is detected on the main page of DNB. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: