Open
Cached
·
just now
35
Headers
Detected Technologies from Headers
HTTP Security Headers
Status
Strict-Transport-Security
Missing
Not configured
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
no-referrer-when-downgrade
Permissions-Policy
Missing
Not configured
Recommendations
- • Add Strict-Transport-Security header with max-age of at least 1 year
- • Add Content-Security-Policy header to prevent XSS attacks
- • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
- • Consider adding Permissions-Policy to control browser features
Performance Headers
Connection
close
Transfer-Encoding
chunked
Vary
Accept-Encoding
connection: close transfer-encoding: chunked vary: Accept-Encoding
Caching Headers
Age
1305
Cache-Control
max-age=1800, stale-if-error=86400, public
Etag
W/"85c41fe985320f0384e5fd6344f8d2e5"
Expires
Sun, 26 Jul 2026 13:55:24 GMT
Last-Modified
Mon, 29 Jun 2026 15:03:47 GMT
age: 1305 cache-control: max-age=1800, stale-if-error=86400, public etag: W/"85c41fe985320f0384e5fd6344f8d2e5" expires: Sun, 26 Jul 2026 13:55:24 GMT last-modified: Mon, 29 Jun 2026 15:03:47 GMT
Content Headers
Content-Type
text/html; charset=utf-8
content-type: text/html; charset=utf-8
Server Headers
Server
cloudflare
server: cloudflare
CORS Headers
Access-Control-Allow-Methods
HEAD, OPTIONS, GET
Access-Control-Allow-Origin
*
access-control-allow-methods: HEAD, OPTIONS, GET access-control-allow-origin: *
Cookies Headers
Other Headers
Alt-Svc
h3=":443"; ma=86400
Cdn-Cache-Control
public, max-age=1800, stale-if-error=86400
Cf-Cache-Status
HIT
Cf-Ray
a213baedb9329aac-IAD
Date
Sun, 26 Jul 2026 13:25:24 GMT
X-Amz-Id-2
BSMre1yROVawi7stmbBNTK5FW/Vgdr9YAaHIOYVHS6jcsImOo/tWDWHcAxh1rOUkBN2KwfRyyWM=
X-Amz-Meta-Mtime
1782745424.137429743
X-Amz-Request-Id
354B7SB3Q6KQ8FS2
X-Amz-Server-Side-Encryption
AES256
X-Backend
web-i-01454defdfb087147
X-Rtd-Domain
www.asdf-format.org
X-Rtd-Force-Addons
true
X-Rtd-Path
/proxito/html/asdf-website/latest/index.html
X-Rtd-Project
asdf-website
X-Rtd-Project-Method
custom_domain
X-Rtd-Resolver-Filename
/
X-Rtd-Version
latest
X-Rtd-Version-Method
path
X-Served
Nginx-Proxito-Sendfile
alt-svc: h3=":443"; ma=86400 cdn-cache-control: public, max-age=1800, stale-if-error=86400 cf-cache-status: HIT cf-ray: a213baedb9329aac-IAD date: Sun, 26 Jul 2026 13:25:24 GMT x-amz-id-2: BSMre1yROVawi7stmbBNTK5FW/Vgdr9YAaHIOYVHS6jcsImOo/tWDWHcAxh1rOUkBN2KwfRyyWM= x-amz-meta-mtime: 1782745424.137429743 x-amz-request-id: 354B7SB3Q6KQ8FS2 x-amz-server-side-encryption: AES256 x-backend: web-i-01454defdfb087147 x-rtd-domain: www.asdf-format.org x-rtd-force-addons: true x-rtd-path: /proxito/html/asdf-website/latest/index.html x-rtd-project: asdf-website x-rtd-project-method: custom_domain x-rtd-resolver-filename: / x-rtd-version: latest x-rtd-version-method: path x-served: Nginx-Proxito-Sendfile
Recommendations
Enable compression (gzip/brotli) to improve performance