SSL Certificate Checker / Utilities
Certificate Decoder
Paste a PEM certificate or a whole chain and see the subject, issuer, validity, SANs, key, Extended Key Usage, validation level, OCSP and CRL URLs, embedded SCTs and SHA-256 fingerprints. Decoded in your browser.
Decoded in your browser: nothing you paste is sent to us.
Check a live site
The SSL Certificate Checker reads the certificate your server actually sends, its chain, revocation, CAA and renewal health.
Open the SSL Certificate Checker
