HTTP Headers Analysis for https://jstach.io

Detected Technologies from Headers

See all in URL Inspect 3

Fastly

GitHub

Varnish

HTTP Security Headers

Status

Strict-Transport-Security

Present

max-age=31556952

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

Accept-Encoding

accept-ranges: bytes
connection: close
vary: Accept-Encoding

Caching Headers

Age

Caching

0

Cache-Control

Caching

max-age=600

Etag

Caching

"67cf43ba-362"

Expires

Caching

Sun, 19 Jul 2026 07:05:50 GMT

Last-Modified

Caching

Mon, 10 Mar 2025 19:55:38 GMT

age: 0
cache-control: max-age=600
etag: "67cf43ba-362"
expires: Sun, 19 Jul 2026 07:05:50 GMT
last-modified: Mon, 10 Mar 2025 19:55:38 GMT

Content Headers

Content-Length

Content

866

Content-Type

Content

text/html; charset=utf-8

content-length: 866
content-type: text/html; charset=utf-8

Server Headers

Server

GitHub.com

server: GitHub.com

CORS Headers

Access-Control-Allow-Origin

Cors

*

access-control-allow-origin: *

Cookies Headers

No cookies headers found

Other Headers

Date

Other

Sun, 19 Jul 2026 07:52:36 GMT

Via

Other

1.1 varnish

X-Cache

Other

HIT

X-Cache-Hits

Other

0

X-Fastly-Request-Id

Other

e90ad6c04e9e2a79dae68a6ca2381cd6b28cdd13

X-Github-Request-Id

Other

AC20:1D1F3C:5C47632:5CF4D65:6A5C74F6

X-Proxy-Cache

Other

MISS

X-Served-By

Other

cache-ewr-kewr1740055-EWR

X-Timer

Other

S1784447557.679306,VS0,VE17

date: Sun, 19 Jul 2026 07:52:36 GMT
via: 1.1 varnish
x-cache: HIT
x-cache-hits: 0
x-fastly-request-id: e90ad6c04e9e2a79dae68a6ca2381cd6b28cdd13
x-github-request-id: AC20:1D1F3C:5C47632:5CF4D65:6A5C74F6
x-proxy-cache: MISS
x-served-by: cache-ewr-kewr1740055-EWR
x-timer: S1784447557.679306,VS0,VE17

Recommendations

Enable compression (gzip/brotli) to improve performance