HTTP Headers Analysis for https://cookpdf.io

HTTP Security Headers

Status

Strict-Transport-Security

Excellent

max-age=31536000; includeSubDomains; preload

Content-Security-Policy

Missing

Not configured Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Good

SAMEORIGIN

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Good

strict-origin-when-cross-origin

Permissions-Policy

Present

camera=(), microphone=(), geolocation=()

Recommendations

• Add Content-Security-Policy header to prevent XSS attacks

Performance Headers

Connection

Performance

close

Transfer-Encoding

Performance

chunked

Vary

Performance

rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding

connection: close
transfer-encoding: chunked
vary: rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding

Caching Headers

Cache-Control

Caching

no-cache, no-store, must-revalidate

cache-control: no-cache, no-store, must-revalidate

Content Headers

Content-Type

Content

text/html; charset=utf-8

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

Server Headers

No server headers found

CORS Headers

No CORS headers found

Cookies Headers

Set-Cookie

Cookies

set-cookie: pdf_editor_lang=vi; Path=/; Expires=Thu, 12 Aug 2027 04:27:08 GMT; Max-Age=31536000; SameSite=lax
did=c4b44762-929b-4262-bedf-25c8d83743a6; Path=/; Expires=Thu, 12 Aug 2027 04:27:08 GMT; Max-Age=31536000; SameSite=lax

Other Headers

Date

Other

Wed, 12 Aug 2026 04:27:08 GMT

Link

Other

URL /_next/static/css/3a06f0b05a1a01ec.css

rel=preload as=style

Via

Other

1.1 Caddy

X-Middleware-Rewrite

Other

/

date: Wed, 12 Aug 2026 04:27:08 GMT
link: </_next/static/css/3a06f0b05a1a01ec.css>; rel=preload; as="style"
via: 1.1 Caddy
x-middleware-rewrite: /

Recommendations

Enable compression (gzip/brotli) to improve performance