cornelsen.ai
cornelsen.ai | Cornelsen
Last scanned Aug 24, 2026, 1:21 PM
Overall score
Excellent
Summary
Hätten Sie gern eine künstliche Intelligenz zur Verfügung, die Ihre Organisation erleichtert, Material erstellt, Unterrichtssequenzen plant und ... This website uses Nginx. SEO is excellent (95/100) and accessibility is excellent (100/100). Security scores excellent (90/100) and performance good (75/100). Top issue: Multiple H1 headings found.
Cornelsen
Hätten Sie gern eine künstliche Intelligenz zur Verfügung, die Ihre Organisation erleichtert, Material erstellt, Unterrichtssequenzen plant und ...
- Mecklenburgische Straße 53, Berlin, 14197, DE
Top issues to fix
3 issues found
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Multiple H1 headings found
SEOKeep a single H1 per page and demote the others to H2/H3.
9 broken links on the page
SEOFix or remove broken links — they waste crawl budget and erode user trust.
SEO
1 issue(s) found
Performance
309 ms
Security
HTTPS & header checks
Accessibility
0 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.
- service@cornelsen.de
- Address
- Mecklenburgische Straße 53, Berlin, 14197, DE
Meta tags
- Title
- cornelsen.ai | Cornelsen
- Description
- Hätten Sie gern eine künstliche Intelligenz zur Verfügung, die Ihre Organisation erleichtert, Material erstellt, Unterrichtssequenzen plant und ...
- Canonical
- https://www.cornelsen.de/digital/ai
- Language
- de
- Charset
- UTF-8
- Viewport
- width=device-width, initial-scale=1.0
- Robots meta
- index,follow
- Manifest
- https://www.cornelsen.de/_Resources/Static/Packages/Cornelsen.DesignKitPortals/Favicon/manifest.json
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- —
- IP address
- 18.184.241.211
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Amazon
- Subject
- cornelsen.de
- Valid from
- Oct 8, 2025
- Valid to
- Nov 6, 2026
- Days until expiry
- 74
- SAN domains
- cornelsen.de, *.cornelsen.de, *.mein.cornelsen.de
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyEnabled
- X-Frame-OptionsMissing
- X-Content-Type-OptionsEnabled
- Referrer-PolicyEnabled
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 2 · H2 15 · H3 34
Links
197 internal · 14 external · 9 broken
Images
28 total · 1 missing alt
Scripts / Styles
17 scripts · 2 stylesheets
JS / CSS size
1.7 MB · 1.2 MB
Page size
209 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 4
- sitemap.xml
- Found
- URLs in sitemap
- -1
SEO issues
- Multiple H1 headings found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://cornelsen.ai
- Final URL
- https://www.cornelsen.de/digital/ai
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 305 ms
- HTML size
- 209 KB
- Redirect chain
- https://cornelsen.ai → https://www.cornelsen.de/digital/ai
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does cornelsen.ai use?
- cornelsen.ai is built with Google Ads, Meta Pixel, Nginx.
- Is cornelsen.ai secure (HTTPS)?
- Yes. cornelsen.ai uses TLS 1.3 with a certificate issued by Amazon, valid until Nov 6, 2026.
- Who hosts cornelsen.ai?
- Hosting provider information for cornelsen.ai is not available yet.
- What is cornelsen.ai's SEO score?
- cornelsen.ai scored 95/100 for SEO in the latest analysis (excellent).
- What is cornelsen.ai's overall website score?
- cornelsen.ai has an overall SiteGraph score of 90/100, combining SEO, performance, security, and accessibility.
- What company operates cornelsen.ai?
- cornelsen.ai is operated by Cornelsen. Hätten Sie gern eine künstliche Intelligenz zur Verfügung, die Ihre Organisation erleichtert, Material erstellt, Unterrichtssequenzen plant und ...
OpenGraph & Twitter Card
OpenGraph
Twitter Card