HTTP Headers Analysis for https://verify.proton.me

HTTP Security Headers

Status

Strict-Transport-Security

Excellent

max-age=31536000; includeSubDomains; preload

Content-Security-Policy

Good

default-src; connect-src; script-src; +7 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

Good

strict-origin-when-cross-origin

Permissions-Policy

Missing

Not configured

Recommendations

• Strengthen CSP by removing 'unsafe-eval'
• Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
• Consider adding Permissions-Policy to control browser features

Performance Headers

Accept-Ranges

Performance

bytes

Connection

Performance

close

Transfer-Encoding

Performance

chunked

Vary

Performance

Accept-Encoding

accept-ranges: bytes
connection: close
transfer-encoding: chunked
vary: Accept-Encoding

Caching Headers

Cache-Control

Caching

max-age=0, no-cache, no-store, must-revalidate

Expires

Caching

Wed, 11 Jan 1984 05:00:00 GMT

Last-Modified

Caching

Fri, 20 Dec 2024 10:04:04 GMT

Pragma

Caching

no-cache

cache-control: max-age=0, no-cache, no-store, must-revalidate
expires: Wed, 11 Jan 1984 05:00:00 GMT
last-modified: Fri, 20 Dec 2024 10:04:04 GMT
pragma: no-cache

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: Session-Id=acaIsLN8DQdURN8ULquDGAAAABo; Domain=proton.me; Path=/; HttpOnly; SameSite=None; Secure; Max-Age=7776000
Tag=default; Path=/; SameSite=None; Secure; Max-Age=7776000

Other Headers

Date

Other

Fri, 27 Mar 2026 13:40:00 GMT

Public-Key-Pins-Report-Only

Other

pin-sha256="CT56BhOTmj5ZIPgb/xD5mH8rY3BLo/MlhP7oPyJUEDo="; pin-sha256="35Dx28/uzN3LeltkCBQ8RHK0tlNSa2kCpCRGNp34Gxc="; report-uri="https://reports.proton.me/reports/tls"

X-Permitted-Cross-Domain-Policies

Other

none

date: Fri, 27 Mar 2026 13:40:00 GMT
public-key-pins-report-only: pin-sha256="CT56BhOTmj5ZIPgb/xD5mH8rY3BLo/MlhP7oPyJUEDo="; pin-sha256="35Dx28/uzN3LeltkCBQ8RHK0tlNSa2kCpCRGNp34Gxc="; report-uri="https://reports.proton.me/reports/tls"
x-permitted-cross-domain-policies: none

Recommendations

Enable compression (gzip/brotli) to improve performance