HTTP Headers Analysis for https://private-user-images.githubusercontent.com

Detected Technologies from Headers

See all in URL Inspect 1

Varnish

HTTP Security Headers

Status

Strict-Transport-Security

Good

max-age=31536000; includeSubDomains

Content-Security-Policy

Strong

default-src; script-src; img-src; +2 more Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Missing

Not configured

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Missing

Not configured

Permissions-Policy

Missing

Not configured

Recommendations

• Consider adding 'preload' to HSTS for maximum security
• Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
• 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

accept-ranges: bytes
connection: close

Caching Headers

No caching headers found

Content Headers

Content-Length

Content

0

content-length: 0

Server Headers

Server

GitHub.Cloud

server: GitHub.Cloud

CORS Headers

No CORS headers found

Cookies Headers

No cookies headers found

Other Headers

Date

Other

Sun, 22 Feb 2026 04:47:14 GMT

Retry-After

Other

0

Timing-Allow-Origin

Other

https://github.com

Via

Other

1.1 varnish

X-Cache

Other

MISS

X-Cache-Hits

Other

0

X-Served-By

Other

cache-ewr-kewr1740032-EWR

X-Timer

Other

S1771735634.203952,VS0,VE0

date: Sun, 22 Feb 2026 04:47:14 GMT
retry-after: 0
timing-allow-origin: https://github.com
via: 1.1 varnish
x-cache: MISS
x-cache-hits: 0
x-served-by: cache-ewr-kewr1740032-EWR
x-timer: S1771735634.203952,VS0,VE0

Recommendations

Enable compression (gzip/brotli) to improve performance

Add Cache-Control header to optimize caching