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dnb.de

DNB - Startseite

Last scanned Jul 26, 2026, 5:17 AM · 1 view

94

Overall score

Excellent

Summary

Die Deutsche Nationalbibliothek ist die zentrale Archivbibliothek Deutschlands. This website uses Apache hosted on ITZBund - ITZBund, DE. SEO is excellent (95/100) and accessibility is excellent (100/100). Security scores excellent (100/100) and performance good (80/100). Top issue: Multiple H1 headings found.

Deutsche Nationalbibliothek

Die Deutsche Nationalbibliothek ist die zentrale Archivbibliothek Deutschlands.

Germany
Hosted on ITZBund - ITZBund, DE

Top issues to fix

3 issues found

  • Multiple H1 headings found

    SEO

    Keep a single H1 per page and demote the others to H2/H3.

  • Sluggish estimated load (3.0s)

    Performance

    Target under 3 seconds: enable compression and serve static assets from a CDN.

  • 17 broken links on the page

    SEO

    Fix or remove broken links — they waste crawl budget and erode user trust.

95

SEO

1 issue(s) found

80

Performance

3.04 s

100

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

Company details published in this site's own structured data.

Deutsche Nationalbibliothek

Die Deutsche Nationalbibliothek ist die zentrale Archivbibliothek Deutschlands.

Contact

Email, phone, and address published on this site's own pages.

Source: https://www.dnb.de/contact

Meta tags

Title
DNB - Startseite
Description
Die Deutsche Nationalbibliothek ist die zentrale Archivbibliothek Deutschlands.
Canonical
https://www.dnb.de/DE/Home/home_node.html
Language
de
Charset
UTF-8
Viewport
width=device-width, initial-scale=1.0, maximum-scale=1.5, user-scalable=1
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
Startseite
og:description
Startseite
og:type
website
og:url
https://www.dnb.de/DE/Home/home_node.html

Twitter Card

twitter:card
summary_large_image
twitter:title
Startseite
twitter:description
Startseite

Technologies

Detected frameworks, languages, and tools.

Apache

Hosting & CDN

Hosting provider
ITZBund - ITZBund, DE
CDN provider
—
IP address
80.245.152.115
ASN
AS35704 (ITZBund - ITZBund, DE)

DNS records

TypeValue
A
  • 80.245.152.115
AAAA—
MX—
TXT—
NS—
CAA—
CNAME
  • itzbund-www.dnb.de
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
D-Trust GmbH
Subject
www.dnb.de
Valid from
Apr 4, 2026
Valid to
Oct 19, 2026
Days until expiry
85
SAN domains
www.dnb.de, www.ddc-deutsch.de, dnb.de, ddc-deutsch.de

Security headers

  • Strict-Transport-SecurityEnabled
  • Content-Security-PolicyEnabled
  • X-Frame-OptionsEnabled
  • X-Content-Type-OptionsEnabled
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: none · 2 cookie(s) observed

Content & assets

Headings

H1 4 · H2 26 · H3 9

Links

62 internal · 13 external · 17 broken

Images

33 total · 0 missing alt

Scripts / Styles

2 scripts · 9 stylesheets

JS / CSS size

8.2 KB · 90 B

Page size

85.6 KB

Robots.txt & Sitemap

robots.txt
Found
Disallow rules
3
sitemap.xml
Found
URLs in sitemap
16

SEO issues

  • Multiple H1 headings found

Accessibility issues

No accessibility issues detected.

Scan details

Requested URL
https://dnb.de
Final URL
https://www.dnb.de/DE/Home/home_node.html
HTTP status
200
HTTP version
HTTP/1.1
Response time
3.04 s
HTML size
85.6 KB
Redirect chain
https://dnb.de → https://www.dnb.de/ → https://www.dnb.de/DE/Home/home_node.html

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Frequently asked questions

What technology does dnb.de use?
dnb.de is built with Apache.
Is dnb.de secure (HTTPS)?
Yes. dnb.de uses TLS 1.3 with a certificate issued by D-Trust GmbH, valid until Oct 19, 2026.
Who hosts dnb.de?
dnb.de is hosted on ITZBund - ITZBund, DE.
What is dnb.de's SEO score?
dnb.de scored 95/100 for SEO in the latest analysis (excellent).
What is dnb.de's overall website score?
dnb.de has an overall SiteGraph score of 94/100, combining SEO, performance, security, and accessibility.
What company operates dnb.de?
dnb.de is operated by Deutsche Nationalbibliothek. Die Deutsche Nationalbibliothek ist die zentrale Archivbibliothek Deutschlands.