hhu.de
HHU
Last scanned Aug 2, 2026, 5:00 AM · 8 views
Overall score
Great
Summary
Die Heinrich-Heine-Universität Düsseldorf ist eine der jüngeren Hochschulen des Landes NRW – gegründet 1965. This website uses Apache. SEO is fair (70/100) and accessibility is excellent (100/100). Security scores fair (70/100) and performance excellent (90/100). 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.
Top issues to fix
9 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.
+3 more issues — details in the sections below.
SEO
5 issue(s) found
Performance
525 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Score history
+1 overall since Jul 26, 2026
- Overall
- 81
- SEO
- 70
- Security
- 70
- Performance
- 90
- Accessibility
- 100
Organization
Company details published in this site's own structured data.
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
- Hosting provider
- —
- CDN provider
- —
- IP address
- —
- ASN
- —
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
- 172
- 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 10
Links
511 internal · 208 external · 20 broken
Images
10 total · 0 missing alt
Scripts / Styles
11 scripts · 9 stylesheets
JS / CSS size
448 B · 29.6 KB
Page size
768 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- 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
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://hhu.de
- Final URL
- https://www.hhu.de/
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 510 ms
- HTML size
- 768 KB
- Redirect chain
- https://hhu.de → https://www.hhu.de/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does hhu.de use?
- hhu.de is built with jQuery, Apache.
- Is hhu.de secure (HTTPS)?
- Yes. hhu.de uses TLS 1.2 with a certificate issued by Hellenic Academic and Research Institutions CA, valid until Jan 21, 2027.
- Who hosts hhu.de?
- Hosting provider information for hhu.de is not available yet.
- What is hhu.de's SEO score?
- hhu.de scored 70/100 for SEO in the latest analysis (fair).
- What is hhu.de's overall website score?
- hhu.de has an overall SiteGraph score of 81/100, combining SEO, performance, security, and accessibility.
- Has hhu.de's score changed over time?
- hhu.de's overall score has improved by 1 point (from 80 to 81) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card