HTTP Headers Analysis for https://a.klaviyo.com

Detected Technologies from Headers

See all in URL Inspect 2

Cloudflare CDN

Netlify

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

Present

same-origin

Permissions-Policy

Missing

Not configured

Recommendations

• Add Content-Security-Policy header to prevent XSS attacks
• Consider adding Permissions-Policy to control browser features

Performance Headers

Connection

Performance

close

Transfer-Encoding

Performance

chunked

Vary

Performance

Accept-Encoding

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

Caching Headers

Age

Caching

147

Cache-Control

Caching

public,max-age=0,must-revalidate

age: 147
cache-control: public,max-age=0,must-revalidate

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

Access-Control-Allow-Origin

Cors

*

access-control-allow-origin: *

Cookies Headers

Set-Cookie

Cookies

set-cookie: hasLoggedInBefore=false; Max-Age=31536000; Path=/; Secure; SameSite=Lax; Domain=.klaviyo.com

Other Headers

Cache-Status

Other

"Netlify Edge"; hit, "Netlify Edge"; hit;detail=p1

Cf-Cache-Status

Other

DYNAMIC

Cf-Ray

Other

9e89b4ab2f88826c-IAD

Date

Other

Tue, 07 Apr 2026 14:26:09 GMT

Service-Worker-Allowed

Other

/

X-Nf-Request-Id

Other

01KNM5C9WFJWNCHDC12PVWDW5G

cache-status: "Netlify Edge"; hit, "Netlify Edge"; hit;detail=p1
cf-cache-status: DYNAMIC
cf-ray: 9e89b4ab2f88826c-IAD
date: Tue, 07 Apr 2026 14:26:09 GMT
service-worker-allowed: /
x-nf-request-id: 01KNM5C9WFJWNCHDC12PVWDW5G

Recommendations

Enable compression (gzip/brotli) to improve performance