OpsBench

CSR Decoder

Decode a CSR and verify its self-signature.

● Runs on our server
Shows the subject, the SANs and the key, and verifies the CSR's self-signature — proving it was created with the matching private key.

How it works

We parse the CSR with OpenSSL, read the subject and public key, and verify the CSR’s self-signature — proof it wasn’t corrupted or edited after creation.