zum.de
Zentrale für Unterrichtsmedien im Internet e.V.
Last scanned Jul 25, 2026, 6:25 PM · 2 views
Overall score
Fair
Summary
This website uses WordPress hosted on HETZNER-AS - Hetzner Online GmbH, DE. SEO is fair (60/100) and accessibility is excellent (90/100). Security scores good (75/100) and performance good (80/100). Top issue: Missing meta description.
- Germany
- Hosted on HETZNER-AS - Hetzner Online GmbH, DE
Top issues to fix
9 issues found · 3 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing meta description
SEOAdd a ~150-character meta description to control your search-result snippet and lift click-through rate.
No H1 heading found
SEOAdd exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
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.
+3 more issues — details in the sections below.
SEO
5 issue(s) found
Performance
2.11 s
Security
HTTPS & header checks
Accessibility
1 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.zum.de/contact
Meta tags
- Title
- Zentrale für Unterrichtsmedien im Internet e.V.
- Description
- Canonical
- https://www.zum.de/portal/
- Language
- de
- Charset
- UTF-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- max-image-preview:large
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- HETZNER-AS - Hetzner Online GmbH, DE
- CDN provider
- —
- IP address
- 46.4.65.203
- 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 1.2
- Issuer
- Let's Encrypt
- Subject
- www.zum.de
- Valid from
- Jun 22, 2026
- Valid to
- Sep 20, 2026
- Days until expiry
- 56
- SAN domains
- www.zum.de, zum.de
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyEnabled
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 0 · H2 6 · H3 18
Links
30 internal · 13 external · 1 broken
Images
24 total · 4 missing alt
Scripts / Styles
23 scripts · 9 stylesheets
JS / CSS size
329 KB · 439 KB
Page size
149 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 2
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing meta description
- No H1 heading found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- sitemap.xml not found
Accessibility issues
- No H1 heading found
Careers
This company has an active careers page, but individual openings weren't reliably parsed from it — visit the page above for current listings.
Scan details
- Requested URL
- https://zum.de
- Final URL
- https://www.zum.de/portal
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 2.11 s
- HTML size
- 149 KB
- Redirect chain
- https://zum.de → https://www.zum.de/ → https://www.zum.de/portal
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does zum.de use?
- zum.de is built with WordPress, jQuery, Nginx.
- Is zum.de secure (HTTPS)?
- Yes. zum.de uses TLS 1.2 with a certificate issued by Let's Encrypt, valid until Sep 20, 2026.
- Who hosts zum.de?
- zum.de is hosted on HETZNER-AS - Hetzner Online GmbH, DE.
- What is zum.de's SEO score?
- zum.de scored 60/100 for SEO in the latest analysis (fair).
- What is zum.de's overall website score?
- zum.de has an overall SiteGraph score of 75/100, combining SEO, performance, security, and accessibility.
- Is zum.de hiring?
- zum.de has a careers page; check it directly for current openings.
OpenGraph & Twitter Card
OpenGraph
Twitter Card