HTTP Headers Analysis for https://ar-js-org.github.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

"67fa4e49-25f"

Expires

Caching

Fri, 10 Apr 2026 23:14:25 GMT

Last-Modified

Caching

Sat, 12 Apr 2025 11:28:09 GMT

age: 0
cache-control: max-age=600
etag: "67fa4e49-25f"
expires: Fri, 10 Apr 2026 23:14:25 GMT
last-modified: Sat, 12 Apr 2025 11:28:09 GMT

Content Headers

Content-Length

Content

607

Content-Type

Content

text/html; charset=utf-8

content-length: 607
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

Fri, 10 Apr 2026 23:04:25 GMT

Via

Other

1.1 varnish

X-Cache

Other

MISS

X-Cache-Hits

Other

0

X-Fastly-Request-Id

Other

a32259f832cf58e1c59a25cd5e9b9227acc41c4d

X-Github-Request-Id

Other

6B18:3EEE0F:4C21EB:50AC2A:69D981F9

X-Origin-Cache

Other

HIT

X-Proxy-Cache

Other

MISS

X-Served-By

Other

cache-lga21925-LGA

X-Timer

Other

S1775862265.399664,VS0,VE19

date: Fri, 10 Apr 2026 23:04:25 GMT
via: 1.1 varnish
x-cache: MISS
x-cache-hits: 0
x-fastly-request-id: a32259f832cf58e1c59a25cd5e9b9227acc41c4d
x-github-request-id: 6B18:3EEE0F:4C21EB:50AC2A:69D981F9
x-origin-cache: HIT
x-proxy-cache: MISS
x-served-by: cache-lga21925-LGA
x-timer: S1775862265.399664,VS0,VE19

Recommendations

Enable compression (gzip/brotli) to improve performance