uni-duesseldorf.de
HHU
Last scanned Jul 26, 2026, 5:17 AM · 2 views
Overall score
Fair
Summary
Die Heinrich-Heine-Universität Düsseldorf ist eine der jüngeren Hochschulen des Landes NRW – gegründet 1965. This website uses Apache hosted on DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE. SEO is good (75/100) and accessibility is excellent (100/100). Security scores fair (70/100) and performance fair (65/100). Top issue: Meta description longer than 160 characters.
Die Heinrich-Heine-Universität Düsseldorf ist eine der jüngeren Hochschulen des Landes NRW – gegründet 1965. Seit 1988 trägt die Universität den Namen des großen Sohnes der Stadt.
- Germany
- Hosted on DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE
Top issues to fix
8 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.
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
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.
+2 more issues — details in the sections below.
SEO
4 issue(s) found
Performance
506 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
Contact
Email, phone, and address published on this site's own pages.
Source: https://www.hhu.de/contact
Meta tags
- Title
- HHU
- Description
- Die Heinrich-Heine-Universität Düsseldorf ist eine der jüngeren Hochschulen des Landes NRW – gegründet 1965. Seit 1988 trägt die Universität den Namen des großen Sohnes der Stadt.
- Canonical
- https://www.hhu.de/
- Language
- de
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1.0, user-scalable=yes
- Robots meta
- index,follow
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- CDN provider
- —
- IP address
- 134.99.128.238
- ASN
- AS680 (DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.2
- Issuer
- Hellenic Academic and Research Institutions CA
- Subject
- hhu.de
- Valid from
- Jan 21, 2026
- Valid to
- Jan 21, 2027
- Days until expiry
- 179
- SAN domains
- hhu.de, www.hera.hhu.de, www.gffu.hhu.de, cedus.hhu.de, www.science-fight.hhu.de, haus-der-universitaet.hhu.de, www.sbv.hhu.de, www.igrad.hhu.de, www.diversity.hhu.de, sell.hhu.de, shk-rat.hhu.de, www.elearning.hhu.de, www.diid.hhu.de, profil.hhu.de, www.hdu.hhu.de, zsu.hhu.de, unichor.hhu.de, science-fight.hhu.de, www.forschung.uni-duesseldorf.de, www.zsu.hhu.de, www.heine-slam.hhu.de, diid.hhu.de, www.haus-der-universitaet.hhu.de, hdu.hhu.de, mentoring.hhu.de, studierendenakademie.hhu.de, www.sell.hhu.de, rz.uni-duesseldorf.de, www.mittelbauvertretung.hhu.de, spz.hhu.de, pr-niwi.hhu.de, heine-slam.hhu.de, www.prwiss.hhu.de, mittelbauvertretung.hhu.de, juno.hhu.de, www.profil.hhu.de, www.shk-rat.hhu.de, smm.hhu.de, prwiss.hhu.de, sbv.hhu.de, hera.hhu.de, studienstart.hhu.de, www.forschung.hhu.de, www.buergeruni.hhu.de, www.mentoring.hhu.de, www.juno.hhu.de, gffu.hhu.de, www.smm.hhu.de, igrad.hhu.de, www.hcsd.hhu.de, hcsd.hhu.de, www.uni-duesseldorf.de, forschung.hhu.de, elearning.hhu.de, www.unichor.hhu.de, www.studienstart.hhu.de, www.cedus.hhu.de, www.hhu.de, www.rz.uni-duesseldorf.de, uniorchester.hhu.de, forschung.uni-duesseldorf.de, colab.hhu.de, buergeruni.hhu.de, www.colab.hhu.de, www.spz.hhu.de, www.pr-niwi.hhu.de, www.uniorchester.hhu.de, uni-duesseldorf.de, diversity.hhu.de, www.studierendenakademie.hhu.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 11 · H3 9
Links
510 internal · 207 external · 4 broken
Images
8 total · 0 missing alt
Scripts / Styles
12 scripts · 9 stylesheets
JS / CSS size
1.0 MB · 514 KB
Page size
764 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 21
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Meta description longer than 160 characters
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://uni-duesseldorf.de
- Final URL
- https://www.hhu.de/
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 491 ms
- HTML size
- 764 KB
- Redirect chain
- https://uni-duesseldorf.de → https://www.hhu.de/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does uni-duesseldorf.de use?
- uni-duesseldorf.de is built with jQuery, Apache.
- Is uni-duesseldorf.de secure (HTTPS)?
- Yes. uni-duesseldorf.de uses TLS 1.2 with a certificate issued by Hellenic Academic and Research Institutions CA, valid until Jan 21, 2027.
- Who hosts uni-duesseldorf.de?
- uni-duesseldorf.de is hosted on DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE.
- What is uni-duesseldorf.de's SEO score?
- uni-duesseldorf.de scored 75/100 for SEO in the latest analysis (fair).
- What is uni-duesseldorf.de's overall website score?
- uni-duesseldorf.de has an overall SiteGraph score of 76/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card