SSL Checker: certificate, chain, grade & expiry
Free in-browser SSL checker. Returns the SSL Labs grade (A+ to F), certificate subject and issuer, full chain of trust, expiry date, protocol support (TLS 1.2 / 1.3) and cipher suites. Backed by Qualys' public SSL Labs API — cached results return instantly, fresh scans take ~90 s.
publish=off so it's not added to SSL Labs' public board.
SSL Checker — frequently asked questions
A full SSL Labs scan probes every cipher suite and protocol from multiple test rigs, then re-checks against known vulnerability databases. The first scan of a host can take 90–120 s. Cached results return instantly.
A+ is the best. A means strong defaults. B / C indicate weaker ciphers or protocol gaps. F means broken — typically a self-signed or expired certificate, or an unsupported TLS version.
SSL Labs publishes a public list of recent scans by default. This tool sets publish=off automatically, so your scan is not added to that list.