claude.aiSSL Check Results
79
days until expiration
TLSv1.3
TLS_AES_256_GCM_SHA384
Let's Encrypt
256 bits
05C1DD3EDAEF80F3D3E7B4E26E848BAADA58
8B:5D:07:9B:4D:BA:4D:F8:14:5B:35:37:2B:3F:78:01:FA:5E:45:F9
C3:02:EA:5B:64:4C:DC:76:58:A1:60:AE:F1:9A:FF:53:BB:03:A9:F7:C1:CC:3F:CB:02:47:4D:96:5A:5A:E2:DA
Security Score
Excellent security configuration
E8
79 days
May 15, 2026
Aug 13, 2026
Security Analysis
Secure
Secure
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Certificate History
No historical data found
SSL Security Best Practices
Automate Renewals
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Use Strong Protocols
Always prefer TLS 1.3 or 1.2. Disable older, vulnerable protocols like SSL 3.0, TLS 1.0, and TLS 1.1 on your server.
Monitor Transparency
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Frequently Asked Questions
Everything you need to know about claude.ai's security status.
Q:When does claude.ai's SSL certificate expire?
claude.ai's certificate expires on August 13, 2026, which is in 79 days.
Q:Who issued the certificate for claude.ai?
It was issued by Let's Encrypt. This issuer is recognized by all major browsers.
Q:Is the connection to claude.ai safe?
Yes, the certificate is valid, meaning communication with claude.ai is encrypted and secure.
Q:Can I monitor this domain for free?
Yes! You can register at GuardSSL to get automatic alerts before claude.ai's certificate expires, preventing any downtime.