Certificate revocation checker

Paste a PEM certificate. The page reads its details, then asks the issuer's OCSP responder and CRL whether it has been revoked. The certificate is parsed in your browser; the OCSP and CRL requests are relayed through this site, because issuers' servers block direct requests from web pages.

Certificate (PEM)

You can paste the whole chain (server cert first, then the issuer). Only the first certificate is checked.

Issuer certificate and network options

Issuer certificate (PEM)

Custom proxy prefix (optional)

Leave this empty to use this site's built-in proxy. If you would rather use your own proxy, enter its prefix here and the full URL is appended to it.