blue-marble.de
Blue Marble Navigator
Last scanned Aug 24, 2026, 1:23 PM
Overall score
Fair
Summary
This website uses Apache hosted on netcup-AS - netcup GmbH, DE. SEO is fair (60/100) and accessibility is good (75/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing meta description.
- Germany
- Hosted on netcup-AS - netcup GmbH, DE
Top issues to fix
11 issues found · 5 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.
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 viewport meta tag
AccessibilityAdd <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
+5 more issues — details in the sections below.
SEO
5 issue(s) found
Performance
118 ms
Security
HTTPS & header checks
Accessibility
3 issue(s) found
Meta tags
- Title
- Blue Marble Navigator
- Description
- Canonical
- Language
- Charset
- ISO-8859-1
- Viewport
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- netcup-AS - netcup GmbH, DE
- CDN provider
- —
- IP address
- 89.58.8.207
- ASN
- AS197540 (netcup-AS - netcup GmbH, DE)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX |
|
| TXT |
|
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- blue-marble.de
- Valid from
- Aug 20, 2026
- Valid to
- Nov 18, 2026
- Days until expiry
- 84
- SAN domains
- blue-marble.de
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 0 · H2 0 · H3 0
Links
4 internal · 3 external · 0 broken
Images
2 total · 0 missing alt
Scripts / Styles
2 scripts · 1 stylesheets
JS / CSS size
956 B · 1.5 KB
Page size
4.5 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 1
- sitemap.xml
- Found
- URLs in sitemap
- 3
SEO issues
- Missing meta description
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
Accessibility issues
- No H1 heading found
- Missing <html lang> attribute
- Missing viewport meta tag
Scan details
- Requested URL
- https://blue-marble.de
- Final URL
- https://blue-marble.de
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 118 ms
- HTML size
- 4.5 KB
- Redirect chain
- https://blue-marble.de
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does blue-marble.de use?
- blue-marble.de is built with Apache.
- Is blue-marble.de secure (HTTPS)?
- Yes. blue-marble.de uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Nov 18, 2026.
- Who hosts blue-marble.de?
- blue-marble.de is hosted on netcup-AS - netcup GmbH, DE.
- What is blue-marble.de's SEO score?
- blue-marble.de scored 60/100 for SEO in the latest analysis (fair).
- What is blue-marble.de's overall website score?
- blue-marble.de has an overall SiteGraph score of 74/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card