SSL/TLS Certificate Checker

Enter a domain to fetch its live SSL/TLS certificate chain, inspect protocol version, cipher suite, and server connection details. The live fetch is relayed via our server; no data is stored.

Features

• Live certificate chain retrieval
• TLS protocol version detection (TLS 1.2 / 1.3)
• Negotiated cipher suite
• Trust status and chain depth
• Handshake connection metadata

Frequently Asked Questions

How does the URL SSL check work?

The tool establishes a TLS connection to the target server and extracts the certificate chain from the handshake. It also captures the protocol version, cipher suite, key exchange, and ALPN protocol (HTTP/2 support).

Why does my certificate show as untrusted?

A certificate is untrusted if it is self-signed, issued by an unknown CA, expired, or if an intermediate in the chain is missing. Use a recognized Certificate Authority (Let’s Encrypt, DigiCert, Google Trust Services) and serve the full chain.