zkm.de
Zentrum für Kunst und Medien | ZKM
Last scanned Aug 3, 2026, 12:29 PM · 11 views
Overall score
Great
Summary
Das ZKM Karlsruhe ist eine weltweit einzigartige Kulturinstitution – Erleben Sie vielfältige Ausstellungen und Veranstaltungen rund um das Thema Medienkunst. This website uses Nginx. SEO is good (80/100) and accessibility is excellent (100/100). Security scores good (80/100) and performance excellent (100/100). Top issue: No structured data (JSON-LD) found.
Das ZKM Karlsruhe ist eine weltweit einzigartige Kulturinstitution – Erleben Sie vielfältige Ausstellungen und Veranstaltungen rund um das Thema Medienkunst.
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.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
20 broken links on the page
SEOFix or remove broken links — they waste crawl budget and erode user trust.
SEO
3 issue(s) found
Performance
447 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Score history
-2 overall since Jul 26, 2026
- Overall
- 89
- SEO
- 80
- Security
- 80
- Performance
- 100
- Accessibility
- 100
Organization
Company details published in this site's own structured data.
Contact
Email, phone, and address published on this site's own pages.
- info@zkm.de
Meta tags
- Title
- Zentrum für Kunst und Medien | ZKM
- Description
- Das ZKM Karlsruhe ist eine weltweit einzigartige Kulturinstitution – Erleben Sie vielfältige Ausstellungen und Veranstaltungen rund um das Thema Medienkunst.
- Canonical
- https://zkm.de/de
- Language
- de
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1.0
- 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 1.3
- Issuer
- Hellenic Academic and Research Institutions CA
- Subject
- zkm.de
- Valid from
- Dec 30, 2025
- Valid to
- Dec 30, 2026
- Days until expiry
- 148
- SAN domains
- zkm.de, www.zkm.de
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 24 · H3 18
Links
70 internal · 21 external · 20 broken
Images
25 total · 0 missing alt
Scripts / Styles
3 scripts · 2 stylesheets
JS / CSS size
3.9 KB · 0 B
Page size
91.3 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- No structured data (JSON-LD) found
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://zkm.de
- Final URL
- https://zkm.de/de
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 446 ms
- HTML size
- 91.3 KB
- Redirect chain
- https://zkm.de → https://zkm.de/de
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does zkm.de use?
- zkm.de is built with Drupal, Nginx.
- Is zkm.de secure (HTTPS)?
- Yes. zkm.de uses TLS 1.3 with a certificate issued by Hellenic Academic and Research Institutions CA, valid until Dec 30, 2026.
- Who hosts zkm.de?
- Hosting provider information for zkm.de is not available yet.
- What is zkm.de's SEO score?
- zkm.de scored 80/100 for SEO in the latest analysis (great).
- What is zkm.de's overall website score?
- zkm.de has an overall SiteGraph score of 89/100, combining SEO, performance, security, and accessibility.
- Has zkm.de's score changed over time?
- zkm.de's overall score has declined by 2 points (from 91 to 89) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card