HTTP Headers Analysis for https://sainer.nl

Detected Technologies from Headers

See all in URL Inspect 2

Google Static File Front End

Next.js

HTTP Security Headers

Status

Strict-Transport-Security

Missing

Not configured

Content-Security-Policy

Missing

Not configured Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Missing

Not configured

X-Content-Type-Options

Missing

Not configured

Referrer-Policy

Missing

Not configured

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
• Add X-Content-Type-Options: nosniff
• 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

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

private, max-age=0, must-revalidate, stale-while-revalidate=86400

cache-control: private, max-age=0, must-revalidate, stale-while-revalidate=86400

Content Headers

Content-Type

Content

text/html; charset=utf-8

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

Server Headers

Server

Google Frontend

X-Powered-By

Server

Next.js

server: Google Frontend
x-powered-by: Next.js

CORS Headers

No CORS headers found

Cookies Headers

Set-Cookie

Cookies

set-cookie: NEXT_LOCALE=nl; Path=/; SameSite=lax

Other Headers

Alt-Svc

Other

h3=":443"; ma=2592000

Date

Other

Sun, 31 May 2026 06:26:47 GMT

Link

Other

URL /_next/static/media/0c89a48fa5027cee-s.p.4564287c.woff2

rel=preload as=font crossorigin type=font/woff2

URL /_next/static/media/fba5a26ea33df6a3-s.p.1bbdebe6.woff2

rel=preload as=font crossorigin type=font/woff2

URL

/_next/static/chunks/ddb53c4d4da907a9.css

rel=preload as=style

URL

/_next/static/chunks/b17eb688f1d4bd23.css

rel=preload as=style

Via

Other

1.1 google

X-Middleware-Rewrite

Other

/nl

alt-svc: h3=":443"; ma=2592000
date: Sun, 31 May 2026 06:26:47 GMT
link: </_next/static/media/0c89a48fa5027cee-s.p.4564287c.woff2>; rel=preload; as="font"; crossorigin=""; type="font/woff2", </_next/static/media/fba5a26ea33df6a3-s.p.1bbdebe6.woff2>; rel=preload; as="font"; crossorigin=""; type="font/woff2", </_next/static/chunks/ddb53c4d4da907a9.css>; rel=preload; as="style", </_next/static/chunks/b17eb688f1d4bd23.css>; rel=preload; as="style"
via: 1.1 google
x-middleware-rewrite: /nl

Recommendations

Enable compression (gzip/brotli) to improve performance

Consider removing X-Powered-By header to hide server technology