museenkoeln.de
museen.koeln | Museen der Stadt Köln
Last scanned Aug 24, 2026, 1:22 PM
Overall score
Great
Summary
This website uses Apache hosted on TTM - 23M GmbH, DE. SEO is good (75/100) and accessibility is excellent (100/100). Security scores fair (70/100) and performance excellent (90/100). Top issue: Missing meta description.
- Germany
- Hosted on TTM - 23M GmbH, DE
Top issues to fix
6 issues found · 3 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 meta description
SEOAdd a ~150-character meta description to control your search-result snippet and lift click-through rate.
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.
SEO
3 issue(s) found
Performance
384 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
Meta tags
- Title
- museen.koeln | Museen der Stadt Köln
- Description
- Canonical
- https://www.museen.koeln/
- Language
- de
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- Manifest
- https://www.museen.koeln/_assets/2e42feddfab07fbfc020b77ea8456016/Favicon/site.webmanifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- TTM - 23M GmbH, DE
- CDN provider
- —
- IP address
- 194.6.211.163
- ASN
- AS47447 (TTM - 23M GmbH, DE)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- komusite.c-2045.maxcluster.net
- Valid from
- Aug 9, 2026
- Valid to
- Nov 7, 2026
- Days until expiry
- 74
- SAN domains
- artothek.komusite.c-2045.maxcluster.net, filmforum.komusite.c-2045.maxcluster.net, kmb.komusite.c-2045.maxcluster.net, komusite.c-2045.maxcluster.net, makk.komusite.c-2045.maxcluster.net, museum-schnuetgen.de, nsdok.komusite.c-2045.maxcluster.net, rgm.komusite.c-2045.maxcluster.net, rjm.komusite.c-2045.maxcluster.net, schnuetgen.komusite.c-2045.maxcluster.net, wallraf.komusite.c-2045.maxcluster.net, www.museen.koeln, www.museum-schnuetgen.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 9 · H3 11
Links
47 internal · 7 external · 0 broken
Images
57 total · 0 missing alt
Scripts / Styles
7 scripts · 2 stylesheets
JS / CSS size
492 KB · 672 KB
Page size
115 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 9
- sitemap.xml
- Found
- URLs in sitemap
- -1
SEO issues
- Missing meta description
- No structured data (JSON-LD) found
- Missing OpenGraph tags
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://museenkoeln.de
- Final URL
- https://www.museen.koeln/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 382 ms
- HTML size
- 115 KB
- Redirect chain
- https://museenkoeln.de → https://www.museen.koeln/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does museenkoeln.de use?
- museenkoeln.de is built with Google Analytics, Apache.
- Is museenkoeln.de secure (HTTPS)?
- Yes. museenkoeln.de uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Nov 7, 2026.
- Who hosts museenkoeln.de?
- museenkoeln.de is hosted on TTM - 23M GmbH, DE.
- What is museenkoeln.de's SEO score?
- museenkoeln.de scored 75/100 for SEO in the latest analysis (fair).
- What is museenkoeln.de's overall website score?
- museenkoeln.de has an overall SiteGraph score of 83/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card