HTTP Headers Analysis for https://flattr.com

Detected Technologies from Headers

See all in URL Inspect 2

Google Static File Front End

SvelteKit

HTTP Security Headers

Status

Strict-Transport-Security

Present

max-age=31556926

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

• Increase HSTS max-age to at least 1 year and add includeSubDomains
• 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

Accept-Ranges

Performance

bytes

Connection

Performance

close

Vary

Performance

cookie,need-authorization, x-fh-requested-host, accept-encoding

accept-ranges: bytes
connection: close
vary: cookie,need-authorization, x-fh-requested-host, accept-encoding

Caching Headers

Cache-Control

Caching

private

Etag

Caching

"tvxsyg"

cache-control: private
etag: "tvxsyg"

Content Headers

Content-Length

Content

7325

Content-Type

Content

text/html

content-length: 7325
content-type: text/html

Server Headers

Server

Google Frontend

server: Google Frontend

CORS Headers

No CORS headers found

Cookies Headers

No cookies headers found

Other Headers

Alt-Svc

Other

h3=":443";ma=86400,h3-29=":443";ma=86400,h3-27=":443";ma=86400

Date

Other

Mon, 13 Apr 2026 16:20:41 GMT

Link

Other

URL ./_app/immutable/assets/0.Dts4eiNf.css

rel=preload as=style nopush

URL ./_app/immutable/entry/start.EAE-hGgk.js

rel=modulepreload nopush

URL ./_app/immutable/chunks/entry.yd_E8Ted.js

rel=modulepreload nopush

URL ./_app/immutable/chunks/scheduler.8ZBtWCZl.js

rel=modulepreload nopush

URL ./_app/immutable/assets/0.Dts4eiNf.css

rel=preload as=style nopush

URL ./_app/immutable/entry/start.EAE-hGgk.js

rel=modulepreload nopush

URL ./_app/immutable/chunks/entry.yd_E8Ted.js

rel=modulepreload nopush

URL ./_app/immutable/chunks/scheduler.8ZBtWCZl.js

rel=modulepreload nopush

URL ./_app/immutable/entry/app.BSGSTwSn.js

rel=modulepreload nopush

URL ./_app/immutable/chunks/index.DhlqobFm.js

rel=modulepreload nopush

URL ./_app/immutable/nodes/0.Cwxz0Iqz.js

rel=modulepreload nopush

URL ./_app/immutable/chunks/stores.bAkFIW54.js

rel=modulepreload nopush

URL ./_app/immutable/nodes/2.tu-4qqZx.js

rel=modulepreload nopush

X-Cache

Other

MISS

X-Cache-Hits

Other

0

X-Cloud-Trace-Context

Other

b0c346650a10f6e525d926ca9dc95993

X-Country-Code

Other

CA

X-Served-By

Other

cache-lga21949-LGA

X-Sveltekit-Page

Other

true

X-Timer

Other

S1776097242.562657,VS0,VE136

alt-svc: h3=":443";ma=86400,h3-29=":443";ma=86400,h3-27=":443";ma=86400
date: Mon, 13 Apr 2026 16:20:41 GMT
link: <./_app/immutable/assets/0.Dts4eiNf.css>; rel="preload";as="style"; nopush, <./_app/immutable/entry/start.EAE-hGgk.js>; rel="modulepreload"; nopush, <./_app/immutable/chunks/entry.yd_E8Ted.js>; rel="modulepreload"; nopush, <./_app/immutable/chunks/scheduler.8ZBtWCZl.js>; rel="modulepreload"; nopush, <./_app/immutable/entry/app.BSGSTwSn.js>; rel="modulepreload"; nopush, <./_app/immutable/chunks/index.DhlqobFm.js>; rel="modulepreload"; nopush, <./_app/immutable/nodes/0.Cwxz0Iqz.js>; rel="modulepreload"; nopush, <./_app/immutable/chunks/stores.bAkFIW54.js>; rel="modulepreload"; nopush, <./_app/immutable/nodes/2.tu-4qqZx.js>; rel="modulepreload"; nopush
x-cache: MISS
x-cache-hits: 0
x-cloud-trace-context: b0c346650a10f6e525d926ca9dc95993
x-country-code: CA
x-served-by: cache-lga21949-LGA
x-sveltekit-page: true
x-timer: S1776097242.562657,VS0,VE136

Recommendations

Enable compression (gzip/brotli) to improve performance