openstax.org - Secure (SSL)

Résultats de la vérification pour : openstax.org

openstax.org est EN LIGNE

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Info supplémentaires pour https://openstax.org

État du site web openstax.org est EN LIGNE

Informations Techniques

Code de Statut HTTP	200
Version HTTP	HTTP/1.1
HTTPS	✔ Disponible
Adresse IP	13.227.231.9
Logiciel Serveur	AmazonS3
CDN	CDN (Hit from cloudfront)
Compression	gzip
ℹ 🔵 HSTS Manquant	HTTP Strict Transport Security n'est pas configuré. Recommandé pour les sites HTTPS.
ℹ 🔵 Content Security Policy Manquante	CSP n'est pas configuré. Cela aide à prévenir les attaques XSS et l'injection de contenu.
ℹ 🔵 X-Frame-Options Manquant	Le site peut être intégré dans des iframes par des tiers (risque de clickjacking).

Code de Statut HTTP 200
Version HTTP HTTP/1.1
HTTPS ✔ Disponible
Adresse IP 13.227.231.9
Logiciel Serveur AmazonS3
CDN CDN (Hit from cloudfront)
Compression gzip
ℹ 🔵 HSTS Manquant HTTP Strict Transport Security n'est pas configuré. Recommandé pour les sites HTTPS.
ℹ 🔵 Content Security Policy Manquante CSP n'est pas configuré. Cela aide à prévenir les attaques XSS et l'injection de contenu.
ℹ 🔵 X-Frame-Options Manquant Le site peut être intégré dans des iframes par des tiers (risque de clickjacking).

Performance

Résolution DNS	4.1 ms
Connexion TCP	5.3 ms
Négociation TLS	4.1 ms
Temps Jusqu'au Premier Octet (TTFB)	16.9 ms
Téléchargement du Contenu	0.1 ms
Temps de Réponse Total	17 ms

Résolution DNS 4.1 ms
Connexion TCP 5.3 ms
Négociation TLS 4.1 ms
Temps Jusqu'au Premier Octet (TTFB) 16.9 ms
Téléchargement du Contenu 0.1 ms
Temps de Réponse Total 17 ms

Sécurité

HTTPS	✔ Activé
HSTS	✘ Non configuré
CSP	⚠ Non configuré
X-Frame-Options	⚠ Non configuré
X-Content-Type-Options	⚠ Non configuré
HTTP/2	⚠ HTTP/1.1

HTTPS ✔ Activé
HSTS ✘ Non configuré
CSP ⚠ Non configuré
X-Frame-Options ⚠ Non configuré
X-Content-Type-Options ⚠ Non configuré
HTTP/2 ⚠ HTTP/1.1

Vérification SEO Rapide

Titre	OpenStax
Meta Description	OpenStax offers free college textbooks for all types of students, making education accessible & affordable for everyone. Browse our list of available subjects!
Titre Open Graph	OpenStax \| Free Textbooks Online with No Catch
Description Open Graph	OpenStax offers free college textbooks for all types of students, making education accessible & affordable for everyone. Browse our list of available subjects!
Image Open Graph	https://images.openstax.org/apps/image-cdn/v1/assets.open...
Twitter Card	summary_large_image
Titre Twitter	OpenStax \| Free Textbooks Online with No Catch
Description Twitter	OpenStax offers free college textbooks for all types of students, making education accessible & affordable for everyone. Browse our list of available subjects!
Image Twitter	https://images.openstax.org/apps/image-cdn/v1/assets.open...

Titre OpenStax
Meta Description OpenStax offers free college textbooks for all types of students, making education accessible & affordable for everyone. Browse our list of available subjects!
Titre Open Graph OpenStax | Free Textbooks Online with No Catch
Description Open Graph OpenStax offers free college textbooks for all types of students, making education accessible & affordable for everyone. Browse our list of available subjects!
Image Open Graph https://images.openstax.org/apps/image-cdn/v1/assets.open...
Twitter Card summary_large_image
Titre Twitter OpenStax | Free Textbooks Online with No Catch
Description Twitter OpenStax offers free college textbooks for all types of students, making education accessible & affordable for everyone. Browse our list of available subjects!
Image Twitter https://images.openstax.org/apps/image-cdn/v1/assets.open...

En-têtes HTTP

Content-type	text/html
Last-modified	Wed, 15 Jul 2026 15:06:07 GMT
X-amz-version-id	TcxsPiIaJ0.UTQiiQr3Ps0DCLo_PSe1Q
Content-encoding	gzip
Server	AmazonS3
Date	Wed, 22 Jul 2026 11:03:30 GMT
Cache-control	public,max-age=60
Etag	W/"322165f5c8613aa06c68e5dbf398d100"
Vary	Accept-Encoding
X-cache	Hit from cloudfront
Via	1.1 316c114eb8fab49aece19f163fecc6aa.cloudfront.net (CloudFront)
X-amz-cf-pop	CDG50-P5
X-amz-cf-id	39G2pWAlc-QX4qwUeHMy7Ii3NcB2gVVz0QcbVWEn9wrpJVfSO_-jdg==
Age	30

Balises Meta

Viewport	width=device-width,initial-scale=1,maximum-scale=5
Description	OpenStax offers free college textbooks for all types of students, making education accessible & affordable for everyone. Browse our list of available subjects!
Mobile-web-app-capable	yes
Theme-color	#fff
Application-name	@openstax/os-webview
Apple-mobile-web-app-capable	yes
Apple-mobile-web-app-status-bar-style	black-translucent
Apple-mobile-web-app-title	@openstax/os-webview
Msapplication-TileColor	#fff
Msapplication-TileImage
Msapplication-config	/dist/assets/browserconfig.xml

Content-type text/html
Last-modified Wed, 15 Jul 2026 15:06:07 GMT
X-amz-version-id TcxsPiIaJ0.UTQiiQr3Ps0DCLo_PSe1Q
Content-encoding gzip
Server AmazonS3
Date Wed, 22 Jul 2026 11:03:30 GMT
Cache-control public,max-age=60
Etag W/"322165f5c8613aa06c68e5dbf398d100"
Vary Accept-Encoding
X-cache Hit from cloudfront
Via 1.1 316c114eb8fab49aece19f163fecc6aa.cloudfront.net (CloudFront)
X-amz-cf-pop CDG50-P5
X-amz-cf-id 39G2pWAlc-QX4qwUeHMy7Ii3NcB2gVVz0QcbVWEn9wrpJVfSO_-jdg==
Age 30

Viewport width=device-width,initial-scale=1,maximum-scale=5
Description OpenStax offers free college textbooks for all types of students, making education accessible & affordable for everyone. Browse our list of available subjects!
Og:url https://openstax.org/
Og:type article
Og:title OpenStax | Free Textbooks Online with No Catch
Og:description OpenStax offers free college textbooks for all types of students, making education accessible & affordable for everyone. Browse our list of available subjects!
Og:image https://images.openstax.org/apps/image-cdn/v1/assets.openstax.org/f=webp,w=640,h=480/oscms-prodcms/media/images/240919_OpenStax_Students_Martin_272.original.webp
Og:image:alt OpenStax: OpenStax | Free Textbooks Online with No Catch
Twitter:card summary_large_image
Twitter:site @OpenStax
Twitter:title OpenStax | Free Textbooks Online with No Catch
Twitter:description OpenStax offers free college textbooks for all types of students, making education accessible & affordable for everyone. Browse our list of available subjects!
Twitter:image https://images.openstax.org/apps/image-cdn/v1/assets.openstax.org/f=webp,w=640,h=480/oscms-prodcms/media/images/240919_OpenStax_Students_Martin_272.original.webp
Twitter:image:alt OpenStax
Mobile-web-app-capable yes
Theme-color #fff
Application-name @openstax/os-webview
Apple-mobile-web-app-capable yes
Apple-mobile-web-app-status-bar-style black-translucent
Apple-mobile-web-app-title @openstax/os-webview
Msapplication-TileColor #fff
Msapplication-TileImage

Msapplication-config /dist/assets/browserconfig.xml

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