HTTP Headers Analysis for https://www.w3.org

Detected Technologies from Headers

See all in URL Inspect 1

Cloudflare CDN

HTTP Security Headers

Status

Strict-Transport-Security

Present

max-age=15552000; includeSubdomains; preload

Content-Security-Policy

Weak

frame-ancestors; upgrade-insecure-requests Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Missing

Not configured

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Missing

Not configured

Permissions-Policy

Missing

Not configured

Recommendations

• Increase HSTS max-age to at least 1 year and add includeSubDomains
• Significantly strengthen CSP directives
• Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
• Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
• Consider adding Permissions-Policy to control browser features

Performance Headers

Connection

Performance

close

Transfer-Encoding

Performance

chunked

Vary

Performance

Origin,Accept-Encoding

connection: close
transfer-encoding: chunked
vary: Origin,Accept-Encoding

Caching Headers

Age

Caching

44223

Cache-Control

Caching

public, s-maxage=7776000

age: 44223
cache-control: public, s-maxage=7776000

Content Headers

Content-Type

Content

text/html; charset=UTF-8

content-type: text/html; charset=UTF-8

Server Headers

Server

cloudflare

server: cloudflare

CORS Headers

No CORS headers found

Cookies Headers

Set-Cookie

Cookies

set-cookie: __cf_bm=.FK4elDWKLQeCXp2vK_BwtD6vLhGm7bRahUe1W3F2Z4-1775664580.2277203-1.0.1.1-BNGtX_P9qQY6Ykig.31VPcFAGhCmwg.3bkxsV.k.FD0AGkt2Zut.tYCwpVKiyAV8rOlRC_8VWHQuhwDXMRdnTp3XWn6gzHCNraqvAjP8MRlry64xoJdP3n.rdNynme9C; HttpOnly; Secure; Path=/; Domain=w3.org; Expires=Wed, 08 Apr 2026 16:39:40 GMT

Other Headers

Alt-Svc

Other

h3=":443"; ma=86400

Cf-Cache-Status

Other

HIT

Cf-Ray

Other

9e9289aa6f6ee607-IAD

Date

Other

Wed, 08 Apr 2026 16:09:40 GMT

X-Backend

Other

sf-frontend

X-Frontend-Content

Other

PUBLISHED

X-Request-Id

Other

9e8e51fce8e66ad9

X-Strata-Cache-Tags

Other

homepage,blogListing,pressReleasesListing,eventsListing,newsListing,ecosystemsLandingPage,blogPosts,newsArticles,pressReleases,members

alt-svc: h3=":443"; ma=86400
cf-cache-status: HIT
cf-ray: 9e9289aa6f6ee607-IAD
date: Wed, 08 Apr 2026 16:09:40 GMT
x-backend: sf-frontend
x-frontend-content: PUBLISHED
x-request-id: 9e8e51fce8e66ad9
x-strata-cache-tags: homepage,blogListing,pressReleasesListing,eventsListing,newsListing,ecosystemsLandingPage,blogPosts,newsArticles,pressReleases,members

Recommendations

Enable compression (gzip/brotli) to improve performance