HTTP Headers Analysis for https://yahoo.jp

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

Good

SAMEORIGIN

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Missing

Not configured

Permissions-Policy

Present

ch-ua-full-version-list=*, ch-ua-model=*, ch-ua-platform-version=*; +2 more

Recommendations

• Add Strict-Transport-Security header with max-age of at least 1 year
• Add Content-Security-Policy header to prevent XSS attacks
• Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)

Performance Headers

Accept-Ranges

Performance

none

Connection

Performance

close

Transfer-Encoding

Performance

chunked

Vary

Performance

Accept-Encoding

accept-ranges: none
connection: close
transfer-encoding: chunked
vary: Accept-Encoding

Caching Headers

Age

Caching

0

Cache-Control

Caching

private, no-cache, must-revalidate

Expires

Caching

-1

age: 0
cache-control: private, no-cache, must-revalidate
expires: -1

Content Headers

Content-Type

Content

text/html; charset=UTF-8

content-type: text/html; charset=UTF-8

Server Headers

No server headers found

CORS Headers

No CORS headers found

Cookies Headers

Set-Cookie

Cookies

set-cookie: A=ev8ib91kuo6sv&sd=A&t=1777081247&u=1777081247&v=1; expires=Sun, 25 Apr 2027 01:40:47 GMT; domain=.yahoo.co.jp; path=/; httponly; secure
XA=ev8ib91kuo6sv&sd=A&t=1777081247&u=1777081247&v=1; expires=Sun, 25 Apr 2027 01:40:47 GMT; domain=.yahoo.co.jp; path=/; httponly; secure; samesite=none
B=c8a2c4fa-4047-11f1-ac34-110eddb7de90&v=6&u=1777081247&s=h7; expires=Tue, 25-Apr-2028 01:40:47 GMT; path=/; domain=.yahoo.co.jp; secure
XB=c8a2c4fa-4047-11f1-ac34-110eddb7de90&v=6&u=1777081247&s=h7; expires=Tue, 25-Apr-2028 01:40:47 GMT; path=/; domain=.yahoo.co.jp; secure; samesite=none

Other Headers

Accept-Ch

Other

Sec-CH-UA-Full-Version-List, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Arch

Date

Other

Sat, 25 Apr 2026 01:40:47 GMT

accept-ch: Sec-CH-UA-Full-Version-List, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Arch
date: Sat, 25 Apr 2026 01:40:47 GMT

Recommendations

Enable compression (gzip/brotli) to improve performance