hdg.de
Startseite - hdg.de
Last scanned Jul 26, 2026, 1:49 PM · 1 view
Overall score
Great
Summary
Die Stiftung vermittelt deutsche Zeitgeschichte nach 1945 in vier Museen in Bonn, Berlin und Leipzig sowie im Internet. This website uses jQuery hosted on HETZNER-AS - Hetzner Online GmbH, DE. SEO is good (85/100) and accessibility is excellent (100/100). Security scores fair (70/100) and performance excellent (90/100). Top issue: No structured data (JSON-LD) found.
Die Stiftung vermittelt deutsche Zeitgeschichte nach 1945 in vier Museen in Bonn, Berlin und Leipzig sowie im Internet. Eintritt und Angebote sind kostenfrei.
- Germany
- Hosted on HETZNER-AS - Hetzner Online GmbH, DE
Top issues to fix
6 issues found · 2 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
Missing OpenGraph tags
SEOAdd og:title/og:description/og:image so shared links render a proper preview card.
1 broken link on the page
SEOFix or remove broken links — they waste crawl budget and erode user trust.
SEO
2 issue(s) found
Performance
330 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
Meta tags
- Title
- Startseite - hdg.de
- Description
- Die Stiftung vermittelt deutsche Zeitgeschichte nach 1945 in vier Museen in Bonn, Berlin und Leipzig sowie im Internet. Eintritt und Angebote sind kostenfrei.
- Canonical
- https://www.hdg.de/
- Language
- de-DE
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- index, follow
- Manifest
- https://www.hdg.de/manifest.json
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- HETZNER-AS - Hetzner Online GmbH, DE
- CDN provider
- —
- IP address
- 49.13.103.233
- ASN
- AS24940 (HETZNER-AS - Hetzner Online GmbH, DE)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- DigiCert Inc
- Subject
- hdg.de
- Valid from
- Mar 31, 2026
- Valid to
- Oct 15, 2026
- Days until expiry
- 78
- SAN domains
- hdg.de, www.hdg.de
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsEnabled
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 0 · H3 12
Links
20 internal · 8 external · 1 broken
Images
18 total · 0 missing alt
Scripts / Styles
18 scripts · 15 stylesheets
JS / CSS size
802 KB · 349 KB
Page size
50.7 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 11
- sitemap.xml
- Found
- URLs in sitemap
- -1
SEO issues
- No structured data (JSON-LD) found
- Missing OpenGraph tags
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://hdg.de
- Final URL
- https://www.hdg.de/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 329 ms
- HTML size
- 50.7 KB
- Redirect chain
- https://hdg.de → https://www.hdg.de/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does hdg.de use?
- hdg.de is built with jQuery.
- Is hdg.de secure (HTTPS)?
- Yes. hdg.de uses TLS 1.3 with a certificate issued by DigiCert Inc, valid until Oct 15, 2026.
- Who hosts hdg.de?
- hdg.de is hosted on HETZNER-AS - Hetzner Online GmbH, DE.
- What is hdg.de's SEO score?
- hdg.de scored 85/100 for SEO in the latest analysis (great).
- What is hdg.de's overall website score?
- hdg.de has an overall SiteGraph score of 86/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card