WEBSITE REPORT

cornelsen.de

Latest V2 analysis: 2026-09-08 · 21:29

Overall score92/100

Run fresh analysis Visit website Website opslaan

This report still uses an older scoring model. Re-run the analysis to calculate the current category scores.

SEO78Good7/9 passed · 2 failed

Technical100Excellent10/10 passed · 0 failed

Performance100Excellent4/4 passed · 0 failed

Security82Good9/11 passed · 2 failed

Mobile100Excellent3/3 passed · 0 failed

SEO · 7/9 passed · 2 failed

Failed: Exactly one H1 · Image alt coverage

Technical · 10/10 passed · 0 failed

All rated checks passed.

Performance · 4/4 passed · 0 failed

All rated checks passed.

Security · 9/11 passed · 2 failed

Failed: Permissions Policy · Email privacy

Mobile · 3/3 passed · 0 failed

All rated checks passed.

Category scores are calculated directly from the individual checks: passed divided by all rated checks. Unrated or not-applicable checks are shown separately and are not counted as passed.

GOOGLE SAFE BROWSING

Veiligheidsreputatie

Controleert de website op bekende Google Safe Browsing-bedreigingen.

De Safe Browsing-controle staat in de wachtrij.

APIV5

Treffers0

Gecontroleerd op—

De Safe Browsing-controle staat in de wachtrij.

Website preview

Open in new tab

DesktopWide browser viewport

https://cornelsen.de/

MobileNarrow smartphone viewport

Screenshot is being created …

REPORT SUMMARY

What matters most

Critical findings are shown before improvements.

Critical issues0

Improvements3

Strongest areaTechnical 100/100

Needs most attentionSEO 78/100

HTTP status200

Load time91 ms

Page size250 KB

H1 headings2

Images45

Missing alt8

Search Engine Optimization

Title tagCornelsen Verlag | Cornelsen

Meta descriptionDer Cornelsen Verlag bietet Bildungsmedien wie Schulbücher, Arbeitshefte und Materialien für den Unterricht für Lernende und Lehrende.

Canonicalhttps://www.cornelsen.de/

Languagede

Text / HTML ratio4.0 %

Headings

H1: 2Startseite Cornelsen Verlag · Registrieren und Vorteile genießen

H2: 6Unsere Empfehlungen für Sie · Aktuelles · Neue und beliebte Unterrichtshilfen

H3: 17Arbeitsblätter zum Download · Schulplaner 2026/27 · Digital unterrichten

H4: 2Aktuell, sofort einsetzbar und zeitsparend · Organisationshilfe für Lehrkräfte

H5: 0

H6: 0

Keyword cloud

buch 6scriptor 5praxis 5unterricht 5auflage 4cornelsen 4unsere 3wissen 3webcode35 3umgang 3unterrichtsstörungen 3sketchnotes 3materialien 3schule 3day 2

Search Preview

https://cornelsen.de/

Cornelsen Verlag | Cornelsen

Der Cornelsen Verlag bietet Bildungsmedien wie Schulbücher, Arbeitshefte und Materialien für den Unterricht für Lernende und Lehrende.

Title length28 characters

Description length135 characters

Image alt coverage82%

Keyword Consistency

KeywordAantalTitleDescriptionH1

buch6———

scriptor5———

praxis5———

unterricht5—✓—

auflage4———

cornelsen4✓✓✓

unsere3———

wissen3———

SEO & indexeerbaarheid

Kunnen zoekmachines deze pagina begrijpen en indexeren?

Indexeerbaar

TitleGoed28 tekens

MetabeschrijvingGoed135 tekens

Robots indexingGoedIndexing allowed

CanonicalGoedhttps://www.cornelsen.de/

Heading hierarchyGoedLogical order

Primary H1Controleren2 found

TaalGoedde

Structured dataGoedBreadcrumbList, ListItem, WebSite, SearchAction

Meta robotsindex,follow

GooglebotNo separate directive

X-Robots-TagNot set

Hreflang2 items

🔒 PREMIUM

Important analysis areas are locked

The free report shows the current state. The decisive details needed to fix issues stay protected and unlock with Premium.

Prioritized actionsWhat should be fixed first

Exact affected URLsWhich pages are actually affected

Technical root causeWhy an issue occurs

Step-by-step remediationConcrete path to a fix

Impact & effortPriority by benefit and effort

Top 5 improvementsThe changes with the biggest impact

Premium does not just reveal more textIt unlocks the concrete evidence, causes and actions behind the visible results.

Upgrade to Premium →

Usability & Technologies

robots.txtFound

XML SitemapFound

FaviconFound

Compressiongzip

Doctypehtml

EncodingDetected

Open GraphDetected

Twitter CardsNot detected

Schema / JSON-LDDetected

Iframes1

Embedded objects0

Server, DNS & TLS

IPv463.178.178.230, 3.67.110.233, 52.29.171.46

IPv6Not detected

Nameserversns-1277.awsdns-31.org, ns-264.awsdns-33.com, ns-771.awsdns-32.net, ns-1757.awsdns-27.co.uk

Mail servers0 cornelsen-de.mail.protection.outlook.com

TLS certificateAvailable

TLS issuerAmazon

TLS expires2027-03-24T23:59:59+00:00

Security & HTTPS

Transport encryption, certificate health, browser security headers and insecure resources.

82/100

✓HTTPS

Website is served over HTTPS.

✓HTTP → HTTPS

HTTP requests are redirected to HTTPS.

✓TLS certificate

Certificate is available and valid.

✓Mixed content

No insecure HTTP resources detected.

✓HSTS

Strict-Transport-Security is enabled.

✓Content Security Policy

A Content-Security-Policy header is present.

✓MIME sniffing

X-Content-Type-Options: nosniff is enabled.

✓Frame protection

Frame embedding is restricted.

✓Referrer Policy

Referrer-Policy is configured.

!Permissions Policy

Restrict unnecessary browser features with Permissions-Policy.

TLS issuerAmazon

TLS expires2027-03-24T23:59:59+00:00

Resterende dagen197

Mixed resources0

TECHNICAL & INFRASTRUCTURE

Delivery, DNS & Server

How the website is delivered before content and SEO are considered.

100/100

HTTP status200

Response time91 ms

HTML size250 KB

CompressionGzip compression

IPv463.178.178.230, 3.67.110.233

IPv6Not detected

Nameservers4

Mail servers1

Redirects2

HTTP → HTTPSYes

WWW resolvesYes

TLSAvailable

Content-Typetext/html;charset=UTF-8

Doctypehtml

Character encodingDetected

Languagede

Server headernginx

X-Powered-ByNot disclosed

Cache-ControlNot sent

Primary IP63.178.178.230

Redirect Analysis

HTTP 301http://cornelsen.de/ → https://cornelsen.de:443/

HTTP 301https://cornelsen.de:443/ → https://www.cornelsen.de/

HTTP 200https://www.cornelsen.de/

DOMAIN & URL

Domain & URL Analysis

Local URL-quality checks using data already collected by the core analysis.

Current URLhttps://cornelsen.de/

HTTPSPassed

URL length21 characters

Domain length12 characters

Domain label length9 characters

Hyphen in domainNone

UnderscorePassed

IDN / PunycodeNo

Subdomains0

WWW hostNo

Canonical hostPassed

Redirect target hostPassed

SEO-friendly URLPassed

404 Error Page

The 404-page check is running asynchronously or unavailable.

DOMAIN PROTECTION

Typo Domains

Common typo variants are generated locally and DNS-tested asynchronously. A missing DNS record is not proof that a domain is available to register.

Typo-domain check is running asynchronously or unavailable.

Domain Registration (RDAP)

RDAP data unavailable for this domain. The check runs asynchronously and does not delay the core report.

PageSpeed Insights

Mobile and desktop Lighthouse performance, measured asynchronously.

Deferred during crawler run

Links & Crawlability

Linkanalyse

Up to 12 links are checked asynchronously after the core report.

Interne links244

Externe domeinen11

Follow links257

NoFollow links0

Links zonder tekst0

Broken in sample0 / 0

Crawlbaarheid

robots.txtFound

Meta robotsindex,follow

IndexingIndexable

Canonicalhttps://www.cornelsen.de/

Canonical hostMatches

XML sitemapFound

Hreflang entries2

Linksteekproef

BestemmingTypeRelAnkertekst

https://cornelsen.de/InternalfollowStartseite Cornelsen Verlag

https://cornelsen.de/magazinInternalfollowMagazin

https://cornelsen.de/service/kundenserviceInternalfollowService & Hilfe

https://cornelsen.de/service/internationalInternalfollowInternational

https://cornelsen.de/shop/direktbestellungInternalfollowDirektbestellung

https://cornelsen.de/digitalInternalfollowDigitale Medien

https://cornelsen.de/grundschuleInternalfollowGrundschule

https://cornelsen.de/grundschule/faecher/deutschInternalfollowDeutsch

https://cornelsen.de/grundschule/faecher/englischInternalfollowEnglisch

https://cornelsen.de/grundschule/faecher/ethikInternalfollowEthik

https://cornelsen.de/grundschule/faecher/franzoesischInternalfollowFranzösisch

https://cornelsen.de/grundschule/faecher/mathematikInternalfollowMathematik

https://cornelsen.de/grundschule/faecher/musikInternalfollowMusik

https://cornelsen.de/grundschule/faecher/katholische-religionInternalfollowKatholische Religion

https://cornelsen.de/grundschule/faecher/sachunterrichtInternalfollowSachunterricht

https://cornelsen.de/grundschule/faecherInternalfollowAlle Fächer

https://cornelsen.de/reihen/einstern-mathematik-310001920000InternalfollowEinstern

https://cornelsen.de/reihen/einsterns-schwester-360002330000InternalfollowEinsterns Schwester

https://cornelsen.de/reihen/jo-jo-mathematik-310000510000InternalfollowJo-Jo Mathematik

https://cornelsen.de/reihen/jo-jo-fibel-360000360000InternalfollowJo-Jo Fibel

SEO

✓Title presentGeslaagd

✓Title lengthGeslaagd

✓Meta descriptionGeslaagd

×Exactly one H1Aandacht nodig

✓Heading hierarchyGeslaagd

✓CanonicalGeslaagd

×Image alt coverageAandacht nodig

✓Structured dataGeslaagd

✓Open Graph metadataGeslaagd

Technical

✓HTTP status 2xxGeslaagd

✓HTML languageGeslaagd

✓Character encodingGeslaagd

✓HTML doctypeGeslaagd

✓Robots allows indexingGeslaagd

✓robots.txtGeslaagd

✓XML sitemapGeslaagd

✓FaviconGeslaagd

✓Internal links presentGeslaagd

✓WWW resolvesGeslaagd

Performance

✓Response under 1sGeslaagd

✓Response under 2.5sGeslaagd

✓HTML under 500 KBGeslaagd

✓Compression enabledGeslaagd

Security

✓HTTPSGeslaagd

✓HTTP redirects to HTTPSGeslaagd

✓Valid TLS certificateGeslaagd

✓No mixed contentGeslaagd

✓HSTSGeslaagd

✓Content Security PolicyGeslaagd

✓MIME sniffing protectionGeslaagd

✓Frame protectionGeslaagd

✓Referrer PolicyGeslaagd

×Permissions PolicyAandacht nodig

×Email privacyAandacht nodig

Mobile

✓Viewport meta tagGeslaagd

✓Responsive viewportGeslaagd

✓No embedded objectsGeslaagd

🔒 FREE ACCOUNT

What changed since the last analysis?

The public report shows the current state. A free account additionally unlocks analysis history, exact new and resolved issues, regressions, trend and stability.

Analysis historyRegression TrackingNew & resolved issuesTrend & stability