🔒 SSL Certificate Checker
Check expiry, issuer, SANs, and chain info — from a domain lookup or PEM paste
Domain Lookup
PEM / Certificate Paste
Domain name (port optional)
ℹ️ Domain lookups use the crt.sh API and Cloudflare DNS-over-HTTPS. Certificate details are fetched from public certificate transparency logs.
Paste PEM certificate (-----BEGIN CERTIFICATE----- … -----END CERTIFICATE-----)
Check Certificate
Load sample PEM
Clear
Checking…
Certificate Details
Subject Alternative Names
Certificate Chain
Raw PEM
Copy PEM