WEBSITE REPORT
duden-institute.de
Latest V2 analysis: 2026-09-08 · 21:29
Overall score76/100
This report still uses an older scoring model. Re-run the analysis to calculate the current category scores.
SEO · 4/9 passed · 5 failed
Failed: Exactly one H1 · Heading hierarchy · Canonical · Image alt coverage · Structured data
Technical · 9/10 passed · 1 failed
Failed: robots.txt
Performance · 4/4 passed · 0 failed
All rated checks passed.
Security · 5/11 passed · 6 failed
Failed: HSTS · Content Security Policy · MIME sniffing protection · Frame protection · Referrer Policy · Permissions Policy
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
La comprobación de Safe Browsing está en cola.Reputación de seguridad
Comprueba el sitio frente a amenazas conocidas de Google Safe Browsing.
APIV5
Coincidencias0
Comprobado—
La comprobación de Safe Browsing está en cola.
Website preview
DesktopWide browser viewport
MobileNarrow smartphone viewport
REPORT SUMMARY
What matters most
Critical findings are shown before improvements.
Critical issues0
Improvements10
Strongest areaPerformance 100/100
Needs most attentionSEO 44/100
Search Engine Optimization
Title tagDuden Institute - Home
Meta descriptionDie Duden Institute für Lerntherapie bieten Kindern und Jugendlichen mit Lernschwierigkeiten individuelle Hilfe vor Ort an fast 100 Standorten in Deutschland.
CanonicalNot found
Languagede
Text / HTML ratio4.8 %
Headings
H1: 3Integrative Lerntherapie · Startchancen-Programm · Aus unserem Blog
H2: 2Standorte · Was Eltern über unsere Arbeit sagen
H3: 4Veranstaltungen · Über uns · Haben Sie Fragen? Wir helfen Ihnen gerne weiter.
H4: 0
H5: 3Gestärktes Selbstbewusstsein · Spielerisch lernen · Individuelle Betreuung
H6: 1Die nächsten Termine
Keyword cloud
Search Preview
https://duden-institute.de/
Duden Institute - Home
Die Duden Institute für Lerntherapie bieten Kindern und Jugendlichen mit Lernschwierigkeiten individuelle Hilfe vor Ort an fast 100 Standorten in Deutschland.
Title length22 characters
Description length158 characters
Image alt coverage97%
Keyword Consistency
KeywordCantidadTitleDescriptionH1
lerntherapie9—✓✓
duden7✓✓—
institute5✓✓—
individuelle3—✓—
institut3—✓—
uns3——✓
bieten2—✓—
kindern2—✓—
SEO e indexabilidad
Indexable ¿Pueden los motores de búsqueda entender e indexar esta página?
TitleBien22 caracteres
Meta descripciónBien158 caracteres
Indexación de robotsBienIndexación permitida
CanonicalRevisarFalta
Jerarquía de encabezadosRevisarNivel de encabezado omitido
H1 principalRevisar3 encontrado
IdiomaBiende
Datos estructuradosRevisarNo detectado
Meta robotsindex, follow
GooglebotNo separate directive
X-Robots-TagNot set
Hreflang0 entradas
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.
Usability & Technologies
robots.txtNot found
XML SitemapFound
FaviconFound
Compressiongzip
Doctypehtml
EncodingDetected
Open GraphDetected
Twitter CardsDetected
Schema / JSON-LDDetected
Iframes0
Embedded objects0
Server, DNS & TLS
IPv483.223.90.241
IPv6Not detected
Nameserversns3-03.azure-dns.org, ns4-03.azure-dns.info, ns1-03.azure-dns.com, ns2-03.azure-dns.net
Mail servers0 dudeninstitute-de01c.mail.protection.outlook.com
TLS certificateAvailable
TLS issuerLet's Encrypt
TLS expires2026-11-12T04:59:09+00:00
Security & HTTPS
Transport encryption, certificate health, browser security headers and insecure resources.
✓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
Enable HSTS after HTTPS works everywhere.!Content Security Policy
Add a restrictive Content-Security-Policy header.!MIME sniffing
Send X-Content-Type-Options: nosniff.!Frame protection
Use CSP frame-ancestors or X-Frame-Options.!Referrer Policy
Add an appropriate Referrer-Policy header.!Permissions Policy
Restrict unnecessary browser features with Permissions-Policy.TECHNICAL & INFRASTRUCTURE
100/100Delivery, DNS & Server
How the website is delivered before content and SEO are considered.
HTTP status200
Response time610 ms
HTML size217 KB
CompressionGzip compression
IPv483.223.90.241
IPv6Not detected
Nameservers4
Mail servers1
Redirects2
HTTP → HTTPSYes
WWW resolvesYes
TLSAvailable
Content-Type
text/html; charset=UTF-8Doctype
htmlCharacter encoding
DetectedLanguage
deServer header
nginxX-Powered-By
PHP/8.4.19Cache-Control
private, must-revalidatePrimary IP
83.223.90.241Redirect Analysis
HTTP 301http://duden-institute.de/ → https://www.duden-institute.de/
HTTP 302https://www.duden-institute.de/ → /home
HTTP 200https://www.duden-institute.de/home
DOMAIN & URL
Domain & URL Analysis
Local URL-quality checks using data already collected by the core analysis.
Current URLhttps://duden-institute.de/
HTTPSPassed
URL length27 characters
Domain length18 characters
Domain label length15 characters
Hyphen in domainDetected
UnderscorePassed
IDN / PunycodeNo
Subdomains0
WWW hostNo
Canonical hostUnavailable
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
Enlaces y rastreo
Up to 12 links are checked asynchronously after the core report.Análisis de enlaces
Enlaces internos58
Dominios externos5
Follow links63
NoFollow links0
Enlaces sin texto5
Rotos en la muestra0 / 0
Rastreabilidad
robots.txtMissing
Meta robotsindex, follow
IndexingIndexable
CanonicalMissing
Canonical hostReview
XML sitemapFound
Hreflang entries0
Muestra de enlaces
DestinoTipoRelTexto del enlace
https://duden-institute.de/Internalfollow—https://duden-institute.de/franchisingInternalfollowFranchisinghttps://duden-institute.de/karriereInternalfollowKarrierehttps://duden-institute.de/kontaktInternalfollowKontakthttps://www.duden-institute.de/lerntherapie/beratungInternalfollowJetzt beraten lassen!https://www.duden-institute.de/ueber-uns/startchancen-programmInternalfollowMehr erfahrenhttps://www.duden-institute.de/lerntherapie/integrative-lerntherapieInternalfollowWeiterlesenhttps://www.duden-institute.de/wissenswertes/rechenschwaecheInternalfollowWeiterlesenhttps://www.duden-institute.de/wissenswertes/lese-rechtschreib-schwaecheInternalfollowWeiterlesenhttps://www.duden-institute.de/wissenswertes/lrs-in-englischInternalfollowWeiterlesenhttps://www.duden-institute.de/lerntherapie/beratungInternalfollowWeiterlesenhttps://www.duden-institute.de/StandorteInternalfollowDeutschlandhttps://www.duden-institute.de/Standorte/International-OnlineInternalfollowInternational-Onlinehttps://www.duden-institute.de/standorteInternalfollowStandortsuchehttps://duden-institute.de/blog/paedagogik-und-psychologie/startchancen-programm-wie-kinder-mit-lrs-und-rechenschwaeche-besser-gefoerdert-werden-koennenInternalfollowMehrhttps://duden-institute.de/blog/paedagogik-und-psychologie/selbstregulation-eine-superpowerInternalfollowMehrhttps://duden-institute.de/blog/paedagogik-und-psychologie/wie-lerntherapie-selbstregulation-bei-kindern-unterstuetzen-kannInternalfollowMehrhttps://duden-institute.de/blog/paedagogik-und-psychologie/rezension-zu-stoerungsfreier-unterricht-trotz-adhsInternalfollowMehrhttps://duden-institute.de/blog/weiterbildung-und-beruf/nachfolge-und-verkauf-einer-lerntherapiepraxis-wie-kann-man-diesen-prozess-gut-vorbereiten-und-erfolgreich-gestaltenInternalfollowMehrhttps://duden-institute.de/ueber-uns/veranstaltungen/kongress/rueckblick-bundeskongress-2026InternalfollowMehrSEO
✓Title presentCorrecto
✓Title lengthCorrecto
✓Meta descriptionCorrecto
×Exactly one H1Requiere atención
×Heading hierarchyRequiere atención
×CanonicalRequiere atención
×Image alt coverageRequiere atención
×Structured dataRequiere atención
✓Open Graph metadataCorrecto
Technical
✓HTTP status 2xxCorrecto
✓HTML languageCorrecto
✓Character encodingCorrecto
✓HTML doctypeCorrecto
✓Robots allows indexingCorrecto
×robots.txtRequiere atención
✓XML sitemapCorrecto
✓FaviconCorrecto
✓Internal links presentCorrecto
✓WWW resolvesCorrecto
Performance
✓Response under 1sCorrecto
✓Response under 2.5sCorrecto
✓HTML under 500 KBCorrecto
✓Compression enabledCorrecto
Security
✓HTTPSCorrecto
✓HTTP redirects to HTTPSCorrecto
✓Valid TLS certificateCorrecto
✓No mixed contentCorrecto
×HSTSRequiere atención
×Content Security PolicyRequiere atención
×MIME sniffing protectionRequiere atención
×Frame protectionRequiere atención
×Referrer PolicyRequiere atención
×Permissions PolicyRequiere atención
✓Email privacyCorrecto
Mobile
✓Viewport meta tagCorrecto
✓Responsive viewportCorrecto
✓No embedded objectsCorrecto
🔒 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
Sign in / register freeThe core analysis remains available without an account.