Información Técnica
| Código de estado HTTP | 200 |
| Versión HTTP | HTTP/1.1 |
| HTTPS | ✔ Disponible |
| Dirección IP | 52.200.228.211 |
| Software del servidor | duo-api |
| CDN | CDN (Miss from cloudfront) |
| Compresión | gzip |
|
ℹ 🔵 Falta HSTS | No se ha configurado HTTP Strict Transport Security. Recomendado para sitios HTTPS. |
|
ℹ 🔵 Falta Content Security Policy | No se ha configurado CSP. Ayuda a prevenir ataques XSS e inyección de contenido. |
Código de estado HTTP 200
Versión HTTP HTTP/1.1
HTTPS ✔ Disponible
Dirección IP 52.200.228.211
Software del servidor duo-api
CDN CDN (Miss from cloudfront)
Compresión gzip
ℹ 🔵 Falta HSTS No se ha configurado HTTP Strict Transport Security. Recomendado para sitios HTTPS.
ℹ 🔵 Falta Content Security Policy No se ha configurado CSP. Ayuda a prevenir ataques XSS e inyección de contenido.
Cadena de Redirecciones
| # | URL | Código de estado HTTP | Estado |
| 1 | https://support.duolingo.com:443 | 301 | HTTP/2 301 |
| 2 | https://www.duolingo.com/help | 200 | HTTP/2 200 |
#1 URL https://support.duolingo.com:443
Código de estado HTTP 301
Estado HTTP/2 301
#2 URL https://www.duolingo.com/help
Código de estado HTTP 200
Estado HTTP/2 200
Rendimiento
| Resolución DNS | 4.1 ms |
| Conexión TCP | 5.4 ms |
| Negociación TLS | 4.8 ms |
| Tiempo hasta el primer byte (TTFB) | 270 ms |
| Descarga de contenido | 0.1 ms |
| Tiempo total de respuesta | 270.1 ms |
Resolución DNS 4.1 ms
Conexión TCP 5.4 ms
Negociación TLS 4.8 ms
Tiempo hasta el primer byte (TTFB) 270 ms
Descarga de contenido 0.1 ms
Tiempo total de respuesta 270.1 ms
Seguridad
| HTTPS | ✔ Activado |
| HSTS | ✘ No configurado |
| CSP | ⚠ No configurado |
| X-Frame-Options | ✔ SAMEORIGIN |
| X-Content-Type-Options | ⚠ No configurado |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Activado
HSTS ✘ No configurado
CSP ⚠ No configurado
X-Frame-Options ✔ SAMEORIGIN
X-Content-Type-Options ⚠ No configurado
HTTP/2 ⚠ HTTP/1.1
Comprobación SEO
Tecnologías Detectadas
| Tecnología | Google Tag Manager |
Tecnología Google Tag Manager
Cabeceras HTTP
| Content-type
| text/html; charset=UTF-8 |
| Date
| Sat, 29 Aug 2026 02:43:48 GMT |
| X-envoy-upstream-service-time
| 6 |
| X-duo-request-host
| www.duolingo.com |
| Server
| duo-api |
| Set-cookie
| wuuid=b4245528-a587-44d9-b382-ffeaf403d444 |
| No-retry
| 1 |
| Cache-control
| no-store, no-cache, must-revalidate, proxy-revalidate |
| Expires
| 0 |
| Pragma
| no-cache |
| Surrogate-control
| no-store |
| X-frame-options
| SAMEORIGIN |
| X-tid
| fffff16b6a922f97259c |
| X-ws
| UK |
| X-runtime
| 0.00447 |
| Content-encoding
| gzip |
| X-cache
| Miss from cloudfront |
| Via
| 1.1 2240c1d1b110ac5a0d12735b2cf480d4.cloudfront.net (CloudFront) |
| X-amz-cf-pop
| CDG54-P1 |
| X-amz-cf-id
| dQzqWDULRKT7IhBYPKh3gTNMGZtuncudAVKhZSSbOlnFavJ3JHR1Tg== |
Meta Tags
| Viewport | width=device-width,initial-scale=1,user-scalable=no |
| Robots | NOODP |
| Refresh | 0; url=/nojs/splash |
| Apple-mobile-web-app-capable | yes |
| Apple-mobile-web-app-status-bar-style | black |
| Apple-mobile-web-app-title | Duolingo |
| Google | notranslate |
| Mobile-web-app-capable | yes |
| Apple-itunes-app | app-id=570060128 |
| Facebook-domain-verification | mwudgypvvgl4fekxjk5rpk3eqg7ykt |
| Fb:app_id | 234536436609303 |
| Keywords | learn, spanish, german, french, portuguese, italian, english, free, lessons, course, language, study, flashcards |
| Description | Duolingo is the world |
Content-type text/html; charset=UTF-8
Date Sat, 29 Aug 2026 02:43:48 GMT
X-envoy-upstream-service-time 6
X-duo-request-host www.duolingo.com
Server duo-api
Set-cookie wuuid=b4245528-a587-44d9-b382-ffeaf403d444
No-retry 1
Cache-control no-store, no-cache, must-revalidate, proxy-revalidate
Expires 0
Pragma no-cache
Surrogate-control no-store
X-frame-options SAMEORIGIN
X-tid fffff16b6a922f97259c
X-ws UK
X-runtime 0.00447
Content-encoding gzip
X-cache Miss from cloudfront
Via 1.1 2240c1d1b110ac5a0d12735b2cf480d4.cloudfront.net (CloudFront)
X-amz-cf-pop CDG54-P1
X-amz-cf-id dQzqWDULRKT7IhBYPKh3gTNMGZtuncudAVKhZSSbOlnFavJ3JHR1Tg==
