HTTP Headers Analysis for https://www.insightful.io

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

Vary

Performance

Accept-Encoding

connection: close
vary: Accept-Encoding

Caching Headers

Age

Caching

2534

Cache-Control

Caching

public, max-age=3600, stale-while-revalidate

Etag

Caching

"CLyUhJLFm5QDEAE="

Last-Modified

Caching

Sat, 02 May 2026 21:24:22 GMT

age: 2534
cache-control: public, max-age=3600, stale-while-revalidate
etag: "CLyUhJLFm5QDEAE="
last-modified: Sat, 02 May 2026 21:24:22 GMT

Content Headers

Content-Length

Content

190439

Content-Type

Content

text/html; charset=utf-8

content-length: 190439
content-type: text/html; charset=utf-8

Server Headers

No server headers found

CORS Headers

No CORS headers found

Cookies Headers

No cookies headers found

Other Headers

Alt-Svc

Other

h3=":443"; ma=2592000

Date

Other

Sun, 03 May 2026 02:02:35 GMT

Link

Other

URL /webflow-static/686e2ea501c2497883c01360_01.avif

rel=preload as=image fetchpriority=high

URL /static/cdn.prod.website-files.com%2F620e4b3d823b714310fa6d5d%2Fcss%2Finsightfulio.shared.60fdbbd04.min.css

rel=preload as=style fetchpriority=high

URL /cloudflare/cookieconsent2/3.1.0/cookieconsent.min.css

rel=preload as=style fetchpriority=high

Via

Other

1.1 google

X-Appengine-Flex-Applatency

Other

0.001

alt-svc: h3=":443"; ma=2592000
date: Sun, 03 May 2026 02:02:35 GMT
link: </webflow-static/686e2ea501c2497883c01360_01.avif>; rel="preload"; as="image"; fetchpriority="high", </static/cdn.prod.website-files.com%2F620e4b3d823b714310fa6d5d%2Fcss%2Finsightfulio.shared.60fdbbd04.min.css>; rel="preload"; as="style"; fetchpriority="high", </cloudflare/cookieconsent2/3.1.0/cookieconsent.min.css>; rel="preload"; as="style"; fetchpriority="high"
via: 1.1 google
x-appengine-flex-applatency: 0.001

Recommendations

Enable compression (gzip/brotli) to improve performance