HTTPS & TLS SECURITY

SSL Certificate Checker

Inspect a website's live TLS certificate, hostname coverage, validity period, issuer, SANs, public key details, SHA‑256 fingerprint and certificate chain.

Quick examples
Opening secure TLS connection and reading certificate…
00:00
Certificate Status
Run a check to inspect the live certificate
READY
—Days Remaining
Hostname Match—
Self Signed—
TLS Version—
Key—
Common Name—
Issuer—
Valid From—
Valid Until—
Serial Number—
Signature Algorithm—
SHA-256 Fingerprint—
Subject Alternative Names
—
Waiting for certificateRun a check to validate the certificate.
—
No certificate chain yetRun a certificate check.

The certificate is retrieved live from the public server using SNI. Private, loopback, link-local and reserved destinations are blocked.