Open
Cached
·
just now
86/100
SECURITY SCORE
Certificate Information
Subject
CN=web.app
Issuer
C=US, O=Google Trust Services, CN=WR4
Valid From
October 28, 2025
Valid Until
January 26, 2026
68 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
C4:13:E4:A6:37:EB:55:37:7A:20:18:54:FC:20:22:D9:CE:EA:44:FE:F6:06:A0:6E:2F:CB:E1:76:BA:9B:A0:2A
Alternative Names
Security Configuration
TLS Protocols
TLS 1.2
TLS 1.3
Forward Secrecy
Supported
(Modern clients use PFS)
HTTP Security Headers
Status
Strict-Transport-Security
Excellent
max-age=63072000; includeSubDomains; preload
Content-Security-Policy
Basic
object-src; base-uri; script-src; +2 more
object-src 'none'; base-uri 'none'; script-src 'nonce-b96CoUQ5wYuH3/zq4tYS0w==' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' 'self' https://www.gstatic.com/ https://www.google-analytics.com/gtm/ https://www.googletagmanager.com/gtag/ https://storage.googleapis.com/appsheet-staging-frontend-assets https://storage.googleapis.com/appsheet-prod-frontend-assets https://www.youtube.com; worker-src 'self'; report-uri https://csp.withgoogle.com/csp/appsheet/2;
X-Frame-Options
Excellent
DENY
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
- • Improve CSP by adding more specific directives and removing 'unsafe-inline'
- • Add X-Content-Type-Options: nosniff
- • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
- • Consider adding Permissions-Policy to control browser features
CAA Records (Certificate Authority Authorization)
CAA Records
Not Configured
(Any CA can issue certificates)
CAA Issues
- • No CAA records configured - any CA can issue certificates
Recommendations
- • Implement CAA records to restrict which CAs can issue certificates for your domain
- • This adds an extra layer of security against unauthorized certificate issuance
- • Example: Add CAA record 'example.com. CAA 0 issue "letsencrypt.org"'
- • Consider adding 'iodef' record to receive security incident reports