SSL/TLS Certificate Checker· free · first run without an account
Tell me a domain and I'll open a real TLS connection — trust and chain, expiry, key strength, which names the certificate covers, protocol and cipher, whether TLS 1.0/1.1 are still on, and whether HTTP redirects to HTTPS with HSTS.
Enter to send · Shift+Enter for a new line · Paste or drop files
AI can make mistakes. Check claims before you publish.