HTTP Headers Analysis for https://flammable.jp

Detected Technologies from Headers

See all in URL Inspect 1

Apache

HTTP Security Headers

Status

Strict-Transport-Security

Missing

Not configured

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

• Add Strict-Transport-Security header with max-age of at least 1 year
• 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

Upgrade, close

Vary

Performance

Accept-Encoding

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

Caching Headers

Etag

Caching

"286-63831dd036ec9"

Last-Modified

Caching

Sun, 22 Jun 2025 23:57:52 GMT

etag: "286-63831dd036ec9"
last-modified: Sun, 22 Jun 2025 23:57:52 GMT

Content Headers

Content-Length

Content

646

Content-Type

Content

text/html

content-length: 646
content-type: text/html

Server Headers

Server

Apache

server: Apache

CORS Headers

No CORS headers found

Cookies Headers

No cookies headers found

Other Headers

Date

Other

Fri, 20 Feb 2026 13:20:48 GMT

Upgrade

Other

h2,h2c

date: Fri, 20 Feb 2026 13:20:48 GMT
upgrade: h2,h2c

Recommendations

Enable compression (gzip/brotli) to improve performance

Add Cache-Control header to optimize caching